Chroma 63200 Series Operation & Programming Manual

63200 Series Operation & Programming Manual Version 1.9 June 2006 P/N A11 000599

Chroma ATE INC. makes no warranty of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Chroma ATE INC. shall not be held liable for errors contained herein or direct, indirect, special, incidental or consequential damages in connection with the furnishing, performance, or use of this material. CHROMA ATE INC. 66 Hwa-Ya 1st Rd., Hwa-Ya Technical Park, Kuei-Shan Hsiang, Taoyuan Hsien, Taiwan Copyright Notices. Copyright 2003-2006 Chroma ATE INC., all rights reserved. Reproduction, adaptation, or translation of this document without prior written permission is prohibited, except as allowed under the copyright laws. ii

period of one year after date of shipment. Chroma agrees to repair or replace any assembly or component found to be defective, under normal use during this period. Chroma’s obligation under this warranty is limited solely to repairing any such instrument, which in Chroma’s sole opinion proves to be defective within the scope of the warranty when returned to the factory or to an authorized service center. Transportation to the factory or service center is to be prepaid by purchaser. Shipment should not be made without prior authorization by Chroma. This warranty does not apply to any products repaired or altered by persons not authorized by Chroma, or not in accordance with instructions furnished by Chroma. If the instrument is defective as a result of misuse, improper repair, or abnormal conditions or operations, repairs will be billed at cost. Chroma assumes no responsibility for its product being used in a hazardous or dangerous manner either alone or in conjunction with other equipment. High voltage used in some instruments may be dangerous if misused. Special disclaimers apply to these instruments. Chroma assumes no liability for secondary charges or consequential damages and in any event, Chroma’s liability for breach of warranty under any contract or otherwise, shall not exceed the purchase price of the specific instrument shipped and against which a claim is made. Any recommendations made by Chroma for use of its products are based upon tests believed to be reliable, but Chroma makes no warranty of the results to be obtained. This warranty is in lieu of all other warranties, expressed or implied, and no representative or person is authorized to represent or assume for Chroma any liability in connection with the sale of our products other than set forth herein. CHROMA ATE INC. 66 Hwa-Ya 1st Rd., Hwa-Ya Technical Park, Kuei-Shan Hsiang, Taoyuan Hsien, Taiwan Tel: 886-3-327-9999 Fax: 886-3-327-2886 http://www.chromaate.com iii

Product Name: DC Electronic Load Model Name:63201, 63202, 63203, 63204, 63205, 63206, 63207, 63208, 63209 ,63210 Manufacturer’s Name: Chroma ATE Inc. Manufacturer’s Address: 66 Hwa-Ya 1st Rd., Hwa-Ya Technical Park, Kuei-Shan Hsiang, Taoyuan Hsien, Taiwan is herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Laws of the Member States Relating to Electromagnetic Compatibility (89/336/EEC) and electrical equipment designed for use within certain voltage limits (73/23/EEC;93/68/EEC) For electromagnetic compatibility, the following standards were applied: EMC: EN61326-1(1997):CISPR22:1994+A1 Class A IEC 1000-3-2:1995 Harmonics Current IEC 1000-3-3:1995 Voltage Fluctuations IEC 1000-4-2:1995 Electrostatic Discharge IEC 1000-4-3:1995 Radio-Frequency Electromagnetic Field IEC 1000-4-4:1995 Fast Transient Burst IEC 1000-4-5:1995 Surge Immunity test IEC 1000-4-6:1995 Immunity To Conducted Disturbances, Induced By Radio Frequency Fields IEC 1000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variations Immunity Test For safety requirement, the following standard was applied: Safety: EN61010-1(1993)+A2(1995) Taiwan May 2005 Place Date Vice President, Engineering Warning: This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. iv

service, and repair of this instrument. Failure to comply with these precautions or specific WARNINGS given elsewhere in this manual will violate safety standards of design, manufacture, and intended use of the instrument. Chroma assumes no liability for the customer’s failure to comply with these requirements. BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed. PROTECTIVE GROUNDING Make sure to connect the protective grounding to prevent an electric shock before turning on the power. NECESSITY OF PROTECTIVE GROUNDING Never cut off the internal or external protective grounding wire, or disconnect the wiring of protective grounding terminal. Doing so will cause a potential shock hazard that may bring injury to a person. FUSES Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard. Caution: Be sure to remove the power cord before changing the fuses. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes. DO NOT REMOVE THE COVER OF THE INSTRUMENT Operating personnel must not remove the cover of the instrument. Component replacement and internal adjustment can be done only by qualified service personnel. CLEANING THE INSTRUMENT Please use a clean and dry cloth to clean the instrument surface. v

Explanation: To avoid injury, death of personnel, or damage to the instrument, the operator must refer to an explanation in the instruction manual. Protective grounding terminal: To protect against electrical shock in case of a fault. This symbol indicates that the terminal must be connected to ground before operation of equipment. WARNING The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met. CAUTION The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the products. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met. vi

Date Version Revised Sections Mar. 2003 1.3 Update “CE Conformity Declaration” to add model 63205/63207/63209 Update “Specifications” for changes and addition of model 63205/63207/ 63209 Add the rear panel of Model 63205/630206/63207/63208/63209 in “Rear Panel Description” May 2003 1.4 Add a note to the “Specifications” for the fuse of 63205 Jan. 2004 1.5 Modify the “Specifications” in Chapter 1 for power rating changes for all models. Add a section of “Dimension Outline for 63200 Series” in Chapter 1. Jan. 2005 1.6 Add the following sections: − “Diagram of RS485 Parallel Connections” in Chapter 2. − “Load Surge Capability” in Chapter 3. − “Timer Function for Battery Discharge Testing” in Chapter 3. Modify the following sections: − “Specifications” in Chapter 1. − “Protection Features” in Chapter 3. Jun. 2005 1.7 Change the address of Chroma in CE-Conformity Declaration Nov. 2005 1.8 Modify the “Specifications” in Chapter 1. Jun. 2006 1.9 Modify the followings: − “Specifications” to add a new model 63210. − Description in the section of “Parallel Connections”. − “Load Connections” in the section of “Application Connection”. − Commands in the chapter of “Language Dictionary”. − “Questionable Status” in the chapter of “Status Reporting” − “Command Summary” in the chapter of “Index”. Add “Installing the 63200 Protective Cover” in the section of “Dimension Outline for 63200 Series”. vii

Table of Contents 1. General Information................................................................................................ 1-1 1.1 Introduction........................................................................................................ 1-1 1.2 Description ......................................................................................................... 1-1 1.3 Overview of Key Features.................................................................................. 1-2 1.4 Specifications ..................................................................................................... 1-2 1.5 Dimension Outline for 63200 Series................................................................ 1-12 2. Installation ................................................................................................................ 2-1 2.1 Introduction........................................................................................................ 2-1 2.2 Inspection ........................................................................................................... 2-1 2.3 Installing............................................................................................................. 2-1 2.3.1 Changing Line Voltage .............................................................................. 2-1 2.3.2 Turn-On Self-Test ...................................................................................... 2-2 2.4 Application Connection ..................................................................................... 2-3 2.4.1 Load Connections....................................................................................... 2-3 2.4.2 Remote Sensing Connections..................................................................... 2-5 2.4.3 Parallel Connections................................................................................... 2-5 2.4.4 Diagram of RS485 Parallel Connections ................................................... 2-6 2.5 Remote Control Connection............................................................................... 2-7 3. Operation Overview................................................................................................. 3-1 3.1 Introduction........................................................................................................ 3-1 3.2 Front Panel Description...................................................................................... 3-1 3.3 Rear Panel Description....................................................................................... 3-2 3.4 Local/Remote Control........................................................................................ 3-4 3.5 Modes of Operation............................................................................................ 3-5 3.5.1 Constant Current Mode.............................................................................. 3-5 3.5.2 Constant Resistance Mode ......................................................................... 3-7 3.5.3 Constant Voltage Mode.............................................................................. 3-8 3.5.4 Constant Power Mode................................................................................ 3-8 3.5.5 Load Surge Capability................................................................................ 3-9 3.5.6 Timer Function for Battery Discharge Testing ........................................ 3-10 3.6 Measurements................................................................................................... 3-11 3.7 Slew Rate & Minimum Transient Time........................................................... 3-11 3.8 Start/Stop Sink Current .................................................................................... 3-12 3.9 Short On/Off..................................................................................................... 3-13 3.10 Load On/Off ..................................................................................................... 3-14 3.11 Protection Features........................................................................................... 3-14 3.12 Save/Recall Setting .......................................................................................... 3-16 3.13 Program............................................................................................................ 3-16 3.14 External Waveform Control............................................................................. 3-16 3.15 Voltage & Current Monitor.............................................................................. 3-16 4. Local Operation........................................................................................................ 4-1 4.1 Introduction........................................................................................................ 4-1 4.2 Local Operation.................................................................................................. 4-1 4.2.1 Setting the Operation Mode ....................................................................... 4-4 4.2.2 Setting the Program.................................................................................. 4-10 ix

4.2.3 Running the Program ............................................................................... 4-12 4.2.4 Setting the Specification .......................................................................... 4-13 4.2.5 Setting the Configuration ......................................................................... 4-13 4.2.6 Recalling Files.......................................................................................... 4-17 4.2.7 Saving File/Default/Program.................................................................... 4-17 4.2.8 Going To Local ........................................................................................ 4-18 4.2.9 Setting System and RS-232C Connection................................................ 4-18 4.2.10 Online Change Level................................................................................ 4-20 5. Basic Information for Programming...................................................................... 5-1 5.1 Introduction........................................................................................................ 5-1 5.1.1 Setting the GPIB Address and RS-232C Parameters................................. 5-1 5.1.2 Wire Connection of RS-232C .................................................................... 5-1 5.2 GPIB Capability of the Electronic Load ............................................................ 5-2 5.3 RS-232C in Remote Control .............................................................................. 5-3 6. Introduction to Programming................................................................................. 6-1 6.1 Basic Definition.................................................................................................. 6-1 6.2 Numerical Data Formats .................................................................................... 6-2 6.3 Character Data Formats...................................................................................... 6-3 6.4 Separators and Terminators................................................................................ 6-3 7. Language Dictionary................................................................................................ 7-1 7.1.1 Common Commands.................................................................................. 7-1 7.1.2 Common Command Dictionary ................................................................. 7-1 7.2 Specific Commands............................................................................................ 7-4 7.2.1 CONFigure Sub-system ............................................................................. 7-5 7.2.2 COMMunicate Sub-system........................................................................ 7-8 7.2.3 CURRENT Sub-system............................................................................ 7-10 7.2.4 FETch Sub-system ................................................................................... 7-13 7.2.5 LOAD Sub-system................................................................................... 7-15 7.2.6 MEASure Sub-system.............................................................................. 7-17 7.2.7 MODE Sub-system .................................................................................. 7-19 7.2.8 POWer Sub-system .................................................................................. 7-20 7.2.9 PROGram Sub-system ............................................................................. 7-21 7.2.10 RESistance Sub-system............................................................................ 7-25 7.2.11 SPECification Sub-system ....................................................................... 7-27 7.2.12 STATus Sub-system................................................................................. 7-29 7.2.13 VOLTage Sub-system.............................................................................. 7-31 7.2.14 SYSTem Sub-system................................................................................ 7-33 8. Status Reporting....................................................................................................... 8-1 8.1 Introduction........................................................................................................ 8-1 8.2 Register Information in Common ...................................................................... 8-1 8.3 Questionable Status............................................................................................ 8-2 8.4 Output Queue ..................................................................................................... 8-3 8.5 Standard Event Status ........................................................................................ 8-3 8.6 Status Byte Register ........................................................................................... 8-4 8.7 Service Request Enable Register ....................................................................... 8-5 9. INDEX....................................................................................................................... 9-1 x

9.1 Command Summary........................................................................................... 9-1 9.2 Parallel Operation............................................................................................... 9-4 xi

63200 series high power electronic loads. All the machines are tested according to safety standard EN61010-1: TYPE POLLUTION II and INSTALLTION CATEGORY II. 1.2 Description The functions of the 63200 series loads are the same except the variations on input voltage, load current, and power ratings. They can be operated independently in constant current (CC) mode, constant resistance (CR) mode, constant voltage (CV) mode or constant power (CP) mode. VOLTS AMPS WATTS/OHMS CP CV CR CC CURSOR GO/NG 7 4 1 0 . 2 5 8 9 6 3 EDIT 16V/80V MODEL 60A/600A DC ELECTRONIC LOAD 63203 4KW 5.2KW Figure 1-1 The Front Panel of the Electronic Load There are three groups of keypads on the electronic load front panel shown in Figure 1-1. They are System keypad, Function keypad and Entry keypad from left to right. 1-1

1.3 Overview of Key Features � Local operation on front panel keypad. � Remote control via GPIB, RS-232C interface or remote controller (optional). � Photo-couple isolation supplies true floating Load. � Automatic fan speed control to reduce audio noise. � Constant current (CC), constant resistance (CR), constant voltage (CV) and constant power (CP) operation modes. � Programmable slew rate, load level, load period and conduct voltage (Von). � Programmable dynamic loading with speed up to 20KHz. � Minimum input resistance allows load to sink high current even with low input voltage. � Selective voltage and current ranges. � Remote sensing capability. � 100 sets of memories to save/recall user-definable setups. � 10 sets of programs to link files for automatic test. � 15-bit A/D converter with precision measurement. � Short circuit simulation. � Automatic GO/NG inspection to confirm UUT within spec. � Isolated voltage and current monitoring waveforms output. � Isolated external Vdc reference input to control the load current. 1.4 Specifications AC input: 115/230 interchangeable Vac line Fuse: 3.15A, 250V * Amplitude: ±10% Frequency: 47 to 63 Hz Maximum VA: 300VA * The fuses in 63201, 63202 are specified as 2A, 250V. The fuses in 63203, 63204, 63205, 63208, 63209 and 63210 are specified as 2.5A, 250V. The specifications of Load are listed below. � Notice 1. The equipment is for indoor use only. 2. The altitude up to 2000 meters is allowed to use the equipment. 3. All specifications are tested under 20°C ∼ 30°C except otherwise stated. 4. The range for operation temperature is 0°C ∼ 40°C. 5. The relative humidity is from 10% to 90%. 6. The specifications of DC current accuracy are tested after the input is applied for 30 seconds. 7. The typical temperature coefficient is 100ppm. 1-2

CAT IV – is for measurements performed at the source of the low-voltage installation. CAT III – is for measurements performed in the building installation. CAT II – is for measurements performed on circuits directly connected to the low-voltage installation. CAT I – is for measurements performed on circuits directly connected to mains. 1-3

SPECIFICATION Model 63201 63202 63203 Power*1 260W 2600W 260W 2600W 520W 5200W Current 0-30A 0-300A 0-5A 0-50A 0-60A 0-600A Voltage 1-80V 2.5-500V 1-80V Min. operating voltage 1V @ 30A 1V @ 300A 2.5V @ 5A 2.5V @ 50A 1V @ 60A 1V @ 600A Constant Current mode Range 0-30A 0-300A 0-5A 0-50A 0-60A 0-600A Resolution 7.5mA 75mA 1.25mA 12.5mA 15mA 150mA Accuracy 0.1%+0.1%FS 0.2%+0.1%FS 0.1%+0.1%FS 0.2%+0.1%FS 0.1%+0.1%FS 0.2%+0.1%FS Constant Resistance mode Range 0.005-20ohm 0.25-1000ohm 0.25-1000ohm 10-40000ohm 0.0025-10ohm 0.125-500ohm Resolution 12 bits 12 bits 12 bits 12 bits 12 bits 12 bits Accuracy*2 0.6mho+0.35% 0.9mho+0.1% 0.012mho+0.35% 0.04mho+0.1% 1.2mho+0.35% *4 1.2mho+0.1% Accuracy*3 (Vin>7V) 0.6mho+0.35% 0.012mho+0.35% 0.012mho+0.35% 112.5u mho+0.35% 1.2mho+0.35% 0.024mho+0.35% Constant Voltage mode Range 1-16V 1-80V 2.5-125V 2.5-500V 1-16V 1-80V Resolution 4mV 20mV 31mV 125mV 4mV 20mV Accuracy 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS Constant Power mode Range 0.6-260W 6-2600W 0.625-260W 6.25-2600W 1.2-520W 12-5200W Resolution 7.5mW 75mW 3.125mW 31.25mW 22.5mW 225mW Accuracy 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS Dynamic mode Timing T1&T2 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S Resolution 1uS 1mS 1uS 1mS 1uS 1mS Accuracy 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm Slew rate 5mA-1.25A/uS 50mA-12.5A/uS 0.8mA-0.2A/uS 8mA-2A/uS 10mA-2.5A/uS 100mA-25A/uS Resolution 5mA/uS 50mA/uS 0.8mA/uS 8mA/uS 10mA/uS 100mA/uS Current Range 0-30A 0-300A 0-5A 0-50A 0-60A 0-600A Resolution 7.5mA 75mA 1.25mA 12.5mA 15mA 150mA Accuracy 0.4%FS 0.4%FS 0.4%FS Measurement Voltage read back Range 0-16V 0-80V 0-125V 0-500V 0-16V 0-80V Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.05%+0.05%FS 0.05%+0.05%FS 0.05%+0.05%FS 1-4

Range 0-30A 0-300A 0-5A 0-50A 0-60A 0-600A Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.1%+0.1%FS 0.1%+0.1%FS 0.1%+0.1%FS Power read back Range 0-260W 0-2600W 0-260W 0-2600W 0-520W 0-5200W Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.3%+0.3%FS 0.3%+0.3%FS 0.3%+0.3%FS General Short circuit Current 30A 300A 5A 50A 60A 600A SIZE (mm) 440(W) X 177(H) X 644(D) 440(W) X 177(H) X 644(D) 440(W) X 353(H) X 644(D) WEIGHT 35Kg 35Kg 58Kg EMC & Safety CE CE CE *Specifications are subject to change without notice. 1. The power rating specifications at ambient temperature = 25°C and see the diagram below for power derating. Power Rating 100% 77% °C Ambient Temperature 10°C 20°C 30°C 40°C 2. The Vin must be greater than min. operating voltage of each model. 3. The Vin must be greater than 7V of each model. All CR mode accuracy should be referring to the CC mode accuracy. 4. Setting error will be 1% for R < 0.005Ω at CRL range. 1-5

Model 63204 63205 63206 Power*1 520W 5200W 650W 6500W 1040W 10400W Current 0-10A 0-100A 0-18A 0-180A 0-60A 0-600A Voltage 2.5-500V 1-80V 1-80V Min. operating voltage 2.5V @ 10A 2.5V @ 100A 1V @ 18A 1V @ 180A 1V @ 60A 1V @ 600A Constant Current mode Range 0-10A 0-100A 0-18A 0-180A 0-60A 0-600A Resolution 2.5mA 25mA 4.5mA 45mA 15mA 150mA Accuracy 0.1%+0.1%FS 0.2%+0.1%FS 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS Constant Resistance mode Range 0.125-500ohm 5-20000ohm 0.008-32ohm 0.4-1600ohm 0.0025-10ohm 0.125-500ohm Resolution 12 bits 12 bits 12 bits 12 bits 12 bits 12 bits Accuracy*2 0.024mho+0.35% 0.08mho+0.1% 0.375mho+0.35% 0.75mho+0.1% 1.2mho+0.35% *4 1.2mho+0.1% Accuracy*3 (Vin>7V) 0.024mho+0.35% 225u mho+0.35% 0.375mho+0.35% 0.075mho+0.35% 1.2mho+0.35% 0.024mho+0.35% Constant Voltage mode Range 2.5-125V 2.5-500V 1-16V 1-80V 1-16V 1-80V Resolution 31mV 125mV 4mV 20mV 4mV 20mV Accuracy 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS Constant Power mode Range 1.25-520W 12.5-5200W 0.36-650W 3.6-6500W 1.2-1040W 12-10400W Resolution 6.25mW 62.5mW 4.6mW 46mW 22.5mW 225mW Accuracy 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS Dynamic mode Timing T1&T2 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S Resolution 1uS 1mS 1uS 1mS 1uS 1mS Accuracy 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm Slew rate 1.6mA-0.4A/uS 16mA-4A/uS 3mA-0.75A/uS 30mA-7.5A/uS 12mA-3A/uS 100mA-25A/uS Resolution 1.6mA/uS 16mA/uS 3mA/uS 30mA/uS 12mA/uS 100mA/uS Current Range 0-10A 0-100A 0-18A 0-180A 0-60A 0-600A Resolution 2.5mA 25mA 4.68mA 46.8mA 15mA 150mA Accuracy 0.4%FS 0.4%FS 0.4%FS Measurement Voltage read back Range 0-125V 0-500V 0-16V 0-80V 0-16V 0-80V Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.05%+0.05%FS 0.05%+0.05%FS 0.05%+0.05%FS 1-6

Range 0-10A 0-100A 0-18A 0-180A 0-60A 0-600A Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.1%+0.1%FS 0.1%+0.1%FS 0.1%+0.1%FS Power read back Range 0-520W 0-5200W 0-650W 0-6500W 0-1040W 0-10400W Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.3%+0.3%FS 0.3%+0.3%FS 0.3%+0.3%FS General Short circuit Current 10A 100A 18A 180A 60A 600A SIZE (mm) 440(W) X 353(H) X 644(D) 440(W) X 310(H) X 644(D) 440(W) X 443.7(H) X 644(D) WEIGHT 58Kg 64Kg 90Kg EMC & Safety CE CE CE *Specifications are subject to change without notice. 1. The power rating specifications at ambient temperature = 25°C and see the diagram below for power derating. Power Rating 100% 77% °C Ambient Temperature 10°C 20°C 30°C 40°C 2. The Vin must be greater than min. operating voltage of each model. 3. The Vin must be greater than 7V of each model. All CR mode accuracy should be referring to the CC mode accuracy. 4. Setting error will be 1% for R < 0.005Ω at CRL range. 1-7

Model 63207 63208 63209 Power*1 1040W 10400W 1560W 15600W 1560W 15600W Current 0-30A 0-300A 0-60A 0-600A 0-100A 0-1000A Voltage 1-80V 1-80V 1-80V Min. operating voltage 1V @ 30A 1V @ 300A 1V @ 60A 1V @ 600A 1V @ 100A 1V @ 1000A Constant Current mode Range 0-30A 0-300A 0-60A 0-600A 0-100A 0-1000A Resolution 9.3mA 75mA 15mA 150mA 31.25mA 250mA Accuracy 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS 0.1%+0.2%FS Constant Resistance mode Range 0.005-20ohm 0.25-1000ohm 0.0025-10ohm 0.125-500ohm 0.0015-6ohm 0.075-300ohm Resolution 12 bits 12 bits 12 bits 12 bits 12 bits 12 bits Accuracy*2 0.6mho+0.35% 0.9mho+0.1% 1.2mho+0.35% *4 1.2mho+0.1% 1.2mho+0.35% *4 1.2mho+0.1% Accuracy*3 (Vin>7V) 0.6mho+0.35% 0.012mho+0.35% 1.2mho+0.35% 0.024mho+0.35% 1.2mho+0.35% 0.024mho+0.35% Constant Voltage mode Range 1-16V 1-80V 1-16V 1-80V 1-16V 1-80V Resolution 4mV 20mV 4mV 20mV 4mV 20mV Accuracy 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS 0.05%+0.1%FS Constant Power mode Range 0.744-1040W 6-10400W 1.2-1560W 12-15600W 2.5-1560W 20-15600W Resolution 9.3mW 75mW 22.5mW 225mW 31.255mW 250mW Accuracy 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS 0.5%+0.5%FS Dynamic mode Timing T1&T2 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S 0.025-10mS 1mS-30S Resolution 1uS 1mS 1uS 1mS 1uS 1mS Accuracy 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm 1uS+100ppm 1mS+100ppm Slew rate 6mA-1.5A/uS 50mA-12.5A/uS 12mA-3A/uS 100mA-25A/uS 20mA-5A/uS 166mA-41.6A/uS Resolution 6mA/uS 50mA/uS 12mA/uS 100mA/uS 20mA/uS 166mA/uS Current Range 0-30A 0-300A 0-60A 0-600A 0-100A 0-1000A Resolution 9.37mA 75mA 15mA 150mA 31.25mA 250mA Accuracy 0.4%FS 0.4%FS 0.4%FS Measurement Voltage read back Range 0-16V 0-80V 0-16V 0-80V 0-16V 0-80V Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.05%+0.05%FS 0.05%+0.05%FS 0.05%+0.05%FS 1-8

Range 0-30A 0-300A 0-60A 0-600A 0-100A 0-1000A Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.1%+0.1%FS 0.1%+0.1%FS 0.1%+0.1%FS Power read back Range 0-1040W 0-10400W 0-1560W 0-15600W 0-1560W 0-15600W Resolution 15 bits 15 bits 15 bits 15 bits 15 bits 15 bits Accuracy 0.3%+0.3%FS 0.3%+0.3%FS 0.3%+0.3%FS General Short circuit Current 30A 300A 60A 600A 100A 1000A SIZE (mm) 440(W) X 443.7(H) X 644(D) 546(W) X 843.7(H) X 700(D) (cabinet) 546(W) X 843.7(H) X 700(D) (cabinet) WEIGHT 90Kg 150Kg 150Kg EMC & Safety CE CE CE *Specifications are subject to change without notice. 1. The power rating specifications at ambient temperature = 25°C and see the diagram below for power derating. Power Rating 100% 77% °C Ambient Temperature 10°C 20°C 30°C 40°C 2. The Vin must be greater than min. operating voltage of each model. 3. The Vin must be greater than 7V of each model. All CR mode accuracy should be referring to the CC mode accuracy. 4. Setting error will be 1% for R < 0.005Ω at CRL range. 1-9

Model 63210 Power*1 1450W 14500W Current 0-15A 0-150A Voltage 2.5-500V Min. operating voltage 2.5V @ 15A 2.5V @ 150A Constant Current mode Range 0-15A 0-150A Resolution 3.75mA 37.5mA Accuracy 0.1%+0.1%FS 0.2%+0.1%FS Constant Resistance mode Range 0.083-333ohm 3.3-13200ohm Resolution 12 bits 12 bits Accuracy*2 0.036mho+0.35% 0.092mho+0.1% Accuracy*3 (Vin>7V) 0.036mho+0.35% 337.5u mho+0.35% Constant Voltage mode Range 2.5-125V 2.5-500V Resolution 31mV 125mV Accuracy 0.05%+0.1%FS 0.05%+0.1%FS Constant Power mode Range 5-1450W 50-14500W Resolution 25mW 250mW Accuracy 0.5%+0.5%FS 0.5%+0.5%FS Dynamic mode Timing T1&T2 0.025-10mS 1mS-30S Resolution 1uS 1mS Accuracy 1uS+100ppm 1mS+100ppm Slew rate 3mA-0.75A/uS 25mA-6A/uS Resolution 3mA/uS 25mA/uS Current Range 0-15A 0-150A Resolution 3.75mA 37.5mA Accuracy 0.4%FS Measurement Voltage read back Range 0-125V 0-500V Resolution 15 bits 15 bits Accuracy 0.05%+0.05%FS 1-10

Range 0-15A 0-150A Resolution 15 bits 15 bits Accuracy 0.1%+0.1%FS Power read back Range 0-1450W 0-14500W Resolution 15 bits 15 bits Accuracy 0.3%+0.3%FS General Short circuit Current 15A 150A SIZE (mm) 546(W) X 843.7(H) X 700(D) (Cabinet) WEIGHT 150Kg EMC & Safety CE *Specifications are subject to change without notice. 1. The power rating specifications at ambient temperature = 25°C and see the diagram below for power derating. Power Rating 100% 77% °C Ambient Temperature 10°C 20°C 30°C 40°C 2. The Vin must be greater than min. operating voltage of each model. 3. The Vin must be greater than 7V of each model. All CR mode accuracy should be referring to the CC mode accuracy. 4. Setting error will be 1% for R < 0.005Ω at CRL range. 1-11

1.5 Dimension Outline for 63200 Series � Model 63201 and 63202 � Model 63203 and 63204 1-12

� Model 63208 and 63209 and 63210 (Top View) Top Side Common Difference ± 2.0 mm Unit: mm Rack mount note for model 63207: Notices for Rack Mount Installation 1 The four wheels must be removed. 2 The supporter must be removed. 3 Use the original banner screws to secure the rack frame. 4 For safety, place it at the bottom of the rack. 1-14

Step 1: Insert the cable into protective cover. Step 2: Socket the Bakelite into the positive/negative copper plate until it touches the chassis and then secure the M6x20L screw and M6 screw nut to block the Bakelite. Step 3: Place a washer on the M6x20L screw and let it go through the positive/negative copper plate. Connect the two cables with an insulator to secure the cables on the positive/negative copper plate. Step 4: Cover the positive/negative copper plate with protective cover on the rear panel. Step 5: Use the attached M6x10L screw to secure the protective cover. Step 6: Complete installation. 1-15

procedure and application considerations. 2.2 Inspection As soon as the instrument is unpacked, inspect any damage that might have occurred in shipping. Keep all packing materials in case that the instrument has to be returned. If any damage is found, please file a claim to the carrier immediately. Do not return the instrument to Chroma without prior approval. In addition to this manual, be sure that the following items are also received – a power cord, this manual, a pair of load terminal screws kit, a V-sense cable and a GPIB cable. 2.3 Installing The Electric Loads can operate well within the temperature range from 0 to 40 ºC. However, you must install the Electric Load in an area that has enough space around the unit for adequate air flowing through and escaping from the back. 2.3.1 Changing Line Voltage The Electronic Load can operate with a 115/230 Vac input as indicated on the left hand side of the unit (facing the unit). If the factory set voltage does not correspond to your nominal line voltage, set the switch to the correct line voltage as shown in Figure 2-1 before plugging in the power cord and turning on the power. � Notice Line fuses do not need to be changed when the line voltage is changed. The line fuses will protect the Electronic Load for incorrect voltage setting. 2-1

Figure 2-1 Line Voltage Switch 2.3.2 Turn-On Self-Test Check the following before turning on the Load. 1. The unit has been set to the correct line voltage by factory. Refer to the line voltage indicated on the left hand side of the panel. 2. The power cord is connected to the AC input socket. � WARNING The power supplies a chassis ground through a third connector. Be sure that your outlet is of three-conductor type with the correct pin connected to ground. Turn on the Load by the power switch on the front panel and observe the display. Immediately after turning on, the Electronic Load executes a self-test to check the RS232, GPIB interface board and the system. The LCD displays FRONT PANEL TESTING [ RS232 ] PASS FRONT PANEL TESTING CHECKSUM PASS GPIB ADDRESS X CHROMA ATE INC. MODEL 632XX and then it goes to the output mode setting display. All of the 7-segment LEDs which display the measuring V, I, P (or R) will be activated when 2-2

In case of failure, return the Load to Chroma sales or service office for repair. 2.4 Application Connection 2.4.1 Load Connections � WARNING To satisfy safety requirements, load wires must be heavy enough not to overheat while carrying the short-circuit output current of the device connected to the Electronic Load. Input connections are made to the + and − terminal block on the rear of the Load. The major considerations in making input connections are the wire size, length and polarity. The minimum wire size required to avoid overheating may not be enough to maintain good regulation. The wires should be large enough to limit the voltage drop to less than 0.5V per lead. The wires should be as short as possible, and bundled or tied together to minimize inductance and noise. Connect the wire from the PLUS (+) terminal to the HIGH potential output terminal of the power supply (UUT). Connect the wire from the MINUS (−) terminal to the LOW potential output terminal of the power supply (UUT). Figure 2-2 illustrates the typical setup of the Load to the UUT. When using Model 63208,63209 and 63210 the distance should be 1 meter for chassis front and 2.5 meters for rear without any foreign object blocking the vents or the hardware temperature may rise and cause OTP. + _ UUT Figure 2-2 Load & Remote Sensing Connection � WARNING 2-3

When in the test conditions that hardware protection is not available such as discharging battery test, etc., it is necessary to do external protection for hardware to prevent any hazard from occurring. The configuration and operation for safety are described below. To avoid unclear explosion caused by operating the hardware, the factory suggests configuring the battery as Figure 2-3 shows to protect the LOAD for usage when doing battery discharge test. LOAD Fuse R No.2 NFB No.1 NFB BATTERY Figure 2-3 Configuring Battery for Discharge (1) (2) (3) (1) (2) (3) (1) (2) (3) NFB: Use No Fuse Breaker, the capacity (current) needs to be smaller than the battery maximum current so that it can cutoff when the MOSFET shorts due to aging. R: It is recommended to install the resistance above 100kΩ1W to avoid giving LOAD extreme voltage in a sudden. Fuse: It is suggested to calculate the KW to be discharged for using appropriate Fuse. It is recommended to use 20% higher. � If more than two LOADs are used for parallel discharge test, each LOAD has to add a fuse for protection at the front. Operating Procedure: Before inputting voltage to LOAD, first switch on No.1 NFB to avoid giving sudden high voltage to the MOSFET inside LOAD to cause it aging. Next switch on No.2 NFB to begin Battery discharge test. To stop discharge test, first press OFF on the LOAD, next switch off No.2 NFB and then No.1 NFB to shut down the discharge test completely. EX: When battery discharge 300V (maximum current is 100A) is in use, how to configure the wire if to discharge 2KW? Ans: I = P / V = 2000 / 300 = 6.6A Since the maximum current of battery is 100A, the NFB used must be smaller than 100A. It is suggested to use a 20A NFB. For R, it is suggested to use 100kΩ/ 1W. Fuse must be larger than loading discharge current. It is 6.6A so use a 10A Fuse is fine. � If there are any questions regarding operation, please contact the FAE of Chroma. 2-4

There are two sensing points for the Electronic Load. One is measurement at Load terminal, and another is measurement at Vsense. The Load will automatically switch to Vsense when Vsense terminals are connected to UUT, otherwise it will measure at Load terminals. Remote sensing compensates for voltage drop in applications that require long lead lengths. It is useful when the load is operating in CV or CR mode, or when it needs precise measurement. Figure 2-2 also illustrates a typical setup for remote sensing operation. � Notice The potential of V-sense red connector must be higher than that of V-sense black connector. 2.4.3 Parallel Connections 63200 series Loads can be paralleled to increase power dissipation. The Loads can be directly paralleled in CC mode for static or dynamic operation while in CR and CP modes the Loads can be paralleled for static operation only. It is not suggested to parallel Loads in CV mode. The Loads is linked via RS-485 cable to RS485 port. RS485 address represents the ID of each Load in the parallel group. There are two operation modes in this parallel function: The first is MASTER mode. The master gets the total setting commands from the remote control or front panel and then informs the slaves what setting current they should do according to their model. (The slave model has to be ready first.) So the only one you need to program is the master. The second is MASTER SYNC mode. Each Load gets the current setting from its own remote control or front panel, the master controls the loads H/W synchronization action so that all loads can be operated with same action at the same time no matter in static or dynamic mode. Referred to Section 4.2.9 for detail information of setting the Loads parallel function parameters. 2-5

2.4.4 Diagram of RS485 Parallel Connections 2.4.4.1 Pin Assignment 2.4.4.2 Connecting Master & Salve 2-6

The remote operation of Load can be done through GPIB, RS-232C or remote controller. These connectors on the rear panel connect the Load to the controller or computer. The GPIB interface of the electronic load is standard. The remote controller is optional. The 63200 series Remote Controller can control the load via RS-232C port. Connect the Remote Controller to the Electronic Load before powering it on. 2-7

quality assurance. It contains a processor, GPIB and RS-232C connectors, front panel keypad, display, and power stage. Its built-in remote control function allows you to control, read back current, voltage and status. The Save/Recall feature allows you to save up to 100 files, 10 programs, and one default setting. All of them can be saved in load EEPROM for future use. The load contains four cooling fans. The fan speed increases or decreases automatically when the load power rises or falls. This feature reduces the overall noise level as the fans do not always run at the maximum speed. Each load can operate in constant current (CC), constant resistance (CR), constant voltage (CV), and constant power (CP) modes. If the application is larger than one of DC load can provide in power or current rating, the DC loads operation in parallel is a suggested way. However, it can be applied in CC mode, CP mode and CR mode. 3.2 Front Panel Description The front panel of the load includes a 20 × 2 characters LCD display, three segment LED, 9 led status indicators, and keypads. The LCD display will show which function is being performed when you use the keypads. One of the keys has two functions. Figure 3-1 shows the front panel of the loads. 3-1

VOLTS AMPS WATTS/OHMS CP CV CR CC CURSOR GO/NG 7 4 1 0 . 2 5 8 9 6 3 EDIT 16V/80V MODEL 60A/600A DC ELECTRONIC LOAD 63203 4KW 5.2KW Figure 3-1 The Front Panel 3.3 Rear Panel Description The Mainframe rear panel includes ports of RS-232C, RS485, GPIB, two remote sense, three BNC connectors, a pair of input terminals, an AC LINE socket, and a fuse holder. Figure 3-2 shows the rear panel of Mainframe 63200. 3-2

Figure 3-2B The Rear Panel of 63205/63206/63207/63208/63209/63210 3.4 Local/Remote Control Local (front panel) control is in effect immediately after the power is applied. The front panel keypad and display allow manual control when Load is used in bench test applications. Remote control goes into effect as soon as the Load receives a command via GPIB, RS-232C or remote controller. When the remote control is in effect, only the computer can control the Load. The front panel keypad has no effect except the LOCAL key. You can return to local control by pressing LOCAL key. Most of the functions that perform remotely can be done locally too at the Load front panel. Details of local operation are given in Chapter 4 Local Operation. Fundamentals of remote programming are described in the latter part of this manual. 3-4

There are four modes of operation: Constant Current (CC), Constant Resistance (CR), Constant Voltage (CV), and Constant Power (CP). You can select the mode by pressing CC, CR, CV, or CP keys under the FUNCTION keypad. The parameters in current, resistance, voltage or power mode can be programmed easily when the mode is selected. All data set in CC/CR/CV/CP mode will be rescaled to fit the resolution of current/voltage levels or slew rate. In local mode any value can be set to the Load from the keypad. There is no upper and lower limit that would cause an error. The Load automatically selects data, which is rescaled from the programmed value, truncates and checks high, low boundary before fitting it into the memory. When the programmed data is over the boundary, the Load will set the maximum or minimum level for it. In remote mode the programmed value cannot be over boundary. An error will occur when data is over the maximum or minimum value. 3.5.1 Constant Current Mode I current setting Load Current V Input Voltage Figure 3-3 Constant Current Mode In CC mode, the Load will sink a current in accordance with the programmed value regardless of the input voltage. The CC mode can be set by CC key in the front panel. Press A/B key to select the current waveform in Static mode. Static function checks the stability of output voltage from a power supply. Press DYNA key to select the current waveform in Dynamic mode. This key is only valid under CC mode, and Dynamic function checks the transient response. Press RANGE key to select the current range suitable for your application no matter in static or dynamic current mode. Low range can supply better current resolution 3-5

You can program two different static settings, A and B under all static CC, CR, CV, and CP modes. Both A and B states use the same range. You can select A or B through the A/B key. Slew rate determines the rate that Load level changes from one state to another. Figure 3-4 shows the load current level after pressing A/B key. CCLA: 4A, CCLB:2A, CCL : 0.2A/µS, CCL : 0.08A/µS Time Current rise slew rate fall slew rate State A State B 4A 2A 10uS 25uS press key "A/B" Figure 3-4 Load Level after Pressing A/B Key Dynamic load operation enables you to program two load levels (CCDL1, CCDL2), load duration (CCDLT1, CCDLT2), and slew rate (CCDL , CCDL ). The loading level is switched between those two load levels according to your specific setting during operation. The dynamic load is commonly used to test the UUT’s performance under transient loading condition. Figure 3-5 shows current waveform of dynamic function. CCDL1:4A, CCDL2:2A, CCDL :1A/µS, CCDL : 1A/µS, CCDLT1:10mS, CCDLT2:10mS Time Current Load1 load2 10mS 10mS 10mS 10mS 4A 2A T1 T2 T1 T2 Figure 3-5 Dynamic Current Waveform 3-6

Slew rate determines the rate at which the current input of changes to a newly programmed value. There are two slew rate values, which are rise rate and fall rate. CC mode voltage specification setting The Load can do GO/NG test by pressing the GO/NG key under loading condition. It will check if the measured data is within the specification that set at the end of each mode setting. We can select are two types of parameters, percent or value, under the configure setting. This operation will be described in detail in section 4.2.4 Setting the Specification. 3.5.2 Constant Resistance Mode V Input Voltage Slope (R setting) I Load Current Figure 3-6 Constant Resistance Mode In CR mode, the Load will sink a current linearly proportional to the input voltage in accordance with the programmed resistance. There is a double pole RC filter of input voltage, so high frequency parts will be removed. The load sink current of CR mode is proportioned to the input voltage through a double pole RC filter. To prevent the load current change caused by the input voltage variation, the power source impedance should be as low as possible, and remote sensing cable must be used to sense load input voltage when high sink current (low setting resistance) is programmed. Resistance can be programmed in either of low range or high range by the RANGE key. The low range is used for input voltage in low voltage range while the high range is for the input voltage over low voltage range. The current range of CR mode is high range. There are two resistance levels (A or B) for CR function as static CC mode. Both A and B states use the same range. You can select CRLA or CRLB using A/B key. Slew rate determines the rate that the load level changes from one state to another. 3-7

3.5.3 Constant Voltage Mode V Voltage setting Input Voltage I Load Current Figure 3-7 Constant Voltage Mode In CV mode the Load will sink current to control the voltage source in programmed value. There are two response speeds of CV modes: fast and slow. The fast/slow respond speed is the slew rate of current change. Voltage can be programmed in either of low range or high range by the RANGE key. The low range is used for input voltage in low voltage range while the high range is for the input voltage over low voltage range. There are two voltage levels (A or B) for CV function. You can select CVHA or CVHB using A/B key. 3.5.4 Constant Power Mode I Load Power setting Current P = V * I V Input Voltage Figure 3-8 Constant Power Mode In CP mode, the Load will sink a current according to the programmed power. This mode is operated under the F/W calculation. That is, take the measured V data, divide the Power setting and get the I setting value. High frequency parts will be removed as there is a lower 3-8

Power can be programmed in either of low range or high range by the RANGE key. The low power range is operated under low current range mode while the high power range is under high current range mode. There are two power levels (A or B) for CP function as other modes. Both A and B states use the same range. You can select CPLA or CPLB using A/B key. Slew rate determines the rate that the load level changes from one state to another. 3.5.5 Load Surge Capability Chroma’s 63200 Series DC Loads provide a unique load surge simulation capability, which allows users to overdrive the loads up to 2.7 times their rated power for short periods. This feature is ideal when the average power require by the UUT is low compared to short-term peak power demands. Plasma Display Panel (PDPs) testing is one typical application, others include battery 3C discharge, breaker & fuse over rating (300% to 1000%) tests, car engine startup simulation and DC motor startup simulation. The amount of surge loading available using the 63200 loads is related to the initial loading conditions. Figures 3-9 and 3-10 show the relationship of initial state (Load_Low under Dynamic mode) and the maximum acceptable overdrive power. Under this operation, the load will display an Over Power Protection Alarm (OPP) and will disable the load current if the user violates the maximum load surge capability showed in the figures below. Figure 3-9 Load Surge Capability (Static Mode) 3-9

Figure 3-10 Load Surge Capability (Dynamic Mode) Note 1: The Initial state under Static Mode should last at least 1 second. Note 2: This load surge capability will be regulated by the temperature de-rating characteristics. (Refer to Note 1 in Specifications) Note 3: Examples below assume the use of the Model 63201 load with a continuous rating of 2600W/300A/1-80VDC. Example 1: STATIC LOADING The Model 63201 can be overdriven to approximately 5200W (200% of its rated continuous power rating) for 0.06 seconds when the starting power is 650W (25% of its rated power). This is represented by DOT on the blue curve in Figure 3-9. Example 2: DYNAMIC LOADING The Model 63201 is capable of a zero – to- 6500W (250%) pulse at a duty cycle of 5%. This is represented by the DOT on the purple curve in Figure 3-10. 3.5.6 Timer Function for Battery Discharge Testing The 63200 Loads include unique timing & measurement function allowing for precision time settings and measurements in the range of 1s to 99999s. This feature allows users to set a final voltage & timeout value for battery discharge testing and similar applications. For example, Figure 3-11 below shows that the 63200’s internal timer can be initiated automatically when the battery voltage falls below a preset value. The timer will continue counting until the second preset voltage value is reached. 3-10

The sampling rate is about 8 mS. Voltage and current measurements are performed with a 15-bit resolution of full scale ratings. There are three sets of 7-segment LEDs for the measuring data. One is for voltage, another is for current, and the other is for Power or Resistance that you can select under the configuration setting. The OHMS led will be on when you select the resistance measurement. 3.7 Slew Rate & Minimum Transient Time Slew rate is defined as the change in current over time. A programmable slew rate allows a controlled transition from one load setting to another to minimize induced voltage drops on inductive power wiring, or to control induced transients on a test device. If the transient from one setting to another is large, the actual transient time can be calculated by dividing the current transition by the slew rate. The actual transition time is defined as the time required for the change of input from 10% to 90% or from 90% to 10% of the programmed excursion. If the transition from one setting to another is small, the small signal bandwidth of Load will limit the minimum transition time for all programmable slew rates. Because of the limit, the actual transition time is longer than the expected time based on the slew rate. Therefore, both minimum transition time and slew rate must be considered in the determination of actual transition time. The minimum transition time is from 24 µS to 6 mS depending on the slew rate setting. 3-11

3.8 Start/Stop Sink Current To simulate the transient characteristics of load to UUT, the critical problems are when and how the Load starts sinking current to UUT. You may set the conducting voltage Von to solve the problems. The Load will start or stop sinking current when the UUT output voltage reaches the Von voltage. You can start sinking current when the load is ON, and the input voltage is over Von voltage, but stop sinking when the load is OFF, or the input voltage is below Von voltage. See Figure 3-9 and 3-10 for start and stop sinking current. There are two operation modes for Von control, latch and non-latch. Latch means that when voltage is over Von voltage, Load will start sinking current continuously in spite of the input voltage drop is below Von voltage. Non-latch means that when the input voltage is below Von voltage, the Load will stop sinking current. The Von voltage and operation mode are set in configuration. Figure 3-12 Start Sinking Current (Von Non-Latch) 3-12

3.9 Short On/Off The Load can simulate a short circuit at input by setting it on with full-scale current. The short circuit can be on/off from the front panel or via remote control. There are two operations for SHORT key on the front panel. One is toggled on/off, and the other is controlled by key. They are selected in configuration. The SHORT key will be enabled only when the Load is ON. Toggled on/off means pressing SHORT once to enable short circuit, and again to disable it. Control by Key means pressing SHORT and holding it to enable short circuit, and releasing it to return to normal operation. The actual value of electronic short depends on the mode and range that are active when the short is turned on. Its basic limit is the maximum power range the Load can supply. In CC mode it is equivalent to the programming of full-scale current. In CR mode it is equivalent to the programming of the minimum resistance for the present resistance range. In CV mode it is equivalent to the programming of zero voltage. In CP mode it is equivalent to the programming of the maximum power for the present power range. Turning on the short circuit does not affect the programmed setting, and Load input will return to the previous programmed values when the short circuit is turned off. Note that turning on the short circuit may cause the Load to sink so much current to trig protection circuit, and will turn off the Load. � Notice The 63200 series have a TTL signal from RS-485 pin 6 for your application to control the external short relay. TTL indicates high/low when the short key is set on/off. 3-13

3.10 Load On/Off A module’s input can be toggled on/off through the blue LOAD ON/OFF key on the front panel, or the remote control. The on/off change for input is done according to the slew rate. Turning off the load does not affect the programmed setting. The load will return to the previous programmed values when the Load is turned on again. 3.11 Protection Features The load includes the protection features: Over power, Over temperature, Fan fail, and Abnormal Alarms for Reverse Voltage and Over Voltage. The appropriate bits in the Load status registers are set when any of the protection features or alarm listed above is active. The Load’s buzzer will beep sound to inform you till protection or alarm status is reset. When any of the protection or alarm occurs, the Load input will turn off. � Over voltage The over voltage alarm circuit is set at a level slightly above the voltage range specified in the Load specification. The over voltage status register bit is set when the OV condition occurs and will remain set till it is reset. The Load will appear OVP as below when over voltage alarm occurs. PROTECTION OVP � Over current When Load is operating in CR or CV mode, it is possible to attempt to sink current more than it is rated for. The limit level of current is set at a level slightly above the current of the Load. The over current status register bit is set when the OC condition occurs, and will remain set till it is reset. The Load will appear as below when over current protection occurs. PROTECTION OCP � Over power The over power protection circuit is set at a level slightly above the power range specified in the Load specifications. The over power status register bit is set when the OP condition occurs, and will remain set till it is reset. The Load will appear as below when over power protection occurs. This protection will be activated also if the power 3-14

PROTECTION OPP � Over temperature The Load has an over temperature protection circuit, which will turn off the load if internal temperature exceeds the safe limit. The over temperature status register bit is set when the OT condition occurs, and will remain set till it is reset. Load will appear as below when over temperature protection occurs. PROTECTION OTP � Reverse Voltage The Load can conduct a reverse current when the polarity of UUT connection is not correct. The maximum safe reverse current is same as the Load rated current. If the UUT reverse current is over the Load rated current, the Load may be damaged. If a reverse voltage condition is detected, you must turn off the power to UUT immediately and correct the connection. The reverse voltage status register bit is set when the RV condition occurs, and will remain set till it is reset. The Load will appear as below when reverse voltage alarm occurs. PROTECTION REV � FAN FAIL The Load has a fan fail protection circuit, which will turn off the load if any of the four fans is out of order. The fan fail status register bit is set when the condition occurs, and will remain set till it is reset. The Load will appear as below when fan fail protection occurs. FAN FAIL All of the protections or alarms will latch when they are tripped. When any protection or alarm occurs, the load will turn off the input, and beep till you remove the condition and reset the protection by pressing ENTER. �CAUTION To protect the Electronic Load from possible damage, the input voltage must not exceed the maximum input voltage rating specification. In addition, the Load + terminal potential must be more than the − terminal potential. 3-15

3.12 Save/Recall Setting The Electronic Load setting can be saved and recalled for various test setups use. This simplifies the repetitive programming for different things. The present setting of mode parameters (CC, CR, CV, CP), programs and power on status (DEFAULT) can be saved in EEPROM using the SAVE key. Later you can recall the settings from the specified file via RECALL key. 3.13 Program The program feature is very powerful. It allows you to simulate various test conditions. There are ten programs in the Electronic Load. Each program has ten sequences. The setting mapped to the program sequence in file is one on one. It means that program 1, sequence 1 maps to file 1, and program 3, sequence 4 maps to file 24. Please see section 4.2.2 and 4.2.3 for setting and running the program. 3.14 External Waveform Control The external dynamic test, operated in the CC mode, is similar to that under the Dynamic test, but the load level switching is controlled by the duty cycle of an External TTL signal. It works the same way as the dynamic test except that the Period control signals are not generated internally, but are inputted from V EXT. Connectors are on the rear panel. A 0-to-10V external signal corresponds to the 0-to-full scale input range, so that users should apply DC offset for the external signal in the range from 0 to 10V. For the configuration of external waveform control usage, refer to section 4.2.5 for details. 3.15 Voltage & Current Monitor The 63200 series have two isolated BNC connectors to monitor load voltage and Current, the output signal from I MON. and V MON. Connectors are on the rear panel. A 0-to-10V output signal corresponds to the 0-to-full scale load V&I range. 3-16

The descriptions include panel control and indicators. 4.2 Local Operation In order to use the front panel keys to control the electronic load, local operation must be in effect. Immediately after the power is applied, local operation will be in effect. When local operation is in effect, you can use the display with keypad on the front panel to control the Load. The display can be used to view the programmed setting. The input voltage, current, power or resistance is displayed on the three 7-segment Leds. � Notice When you edit setting, the display will blink to let you know which setting is to be edited or has been selected. In the remote state, the keys on the front panel have no effect. Only remote controller can program the Load. The 7-segment will show the present input voltage and current readings. The Load LCD display will show REMOTE message. � Notice When setting the load level, the resolution of current, voltage, power, resistance and slew rate will be different from the entered values. The displayed value will remain as the one entered. But the output will be the actual value D/A programmed in the load. These parameters except resistance will be degraded to low values when entered. 4-1

VOLTS AMPS WATTS/OHMS CP CV CR CC CURSOR GO/NG 7 4 1 0 . 2 5 8 9 6 3 EDIT 16V/80V MODEL 60A/600A DC ELECTRONIC LOAD 63203 4KW 4 5 6 1 3 2 5.2KW Figure 4-1 Front Panel of the Load 1. Line switch Turn the ac power on/off. 2. LCD display Display setting information normally. 3. 7-segment LEDs Show the V, I, P, R measured data. 4. System keys SYS To set the remote control status, ext. wave enable and Parallel function parameters. RECALL To recall the saved settings from EEPROM, and all settings from specified files (1 to 101). SAVE To save all of the present mode settings in the specified files (1 to 100). The save program is from 1 to 10. Saving DEFAULT is to save the status for the next time the Electronic Load is turned on. All saved settings are stored in EEPROM, and will not be lost when ac power is cycled. CONF To select configuration data for editing. 5. Function keys CC To select the constant current mode for editing and the CC led aside this key will be on. CR To select the constant resistance mode for editing and the CR led aside this key will be on. CV To select the constant voltage mode for editing and the CV led 4-2

CP To select the constant power mode for editing and the CP led aside this key will be on. RANGE To select the setting level range for each mode. CURRSOR EDIT Enable to edit the digit by rotary knob under loading condition. This key is valid only when the Load is in on status. PROG. To select a program for settings or running. GO/NG To enable the SPEC. checking test. The GO/NG LED will turn red when any of the SPEC fails. It will turn green when the check is all right. A/B To select one of the two static settings. The LED aside this key will be on when you choose A setting, and off when you choose B setting. DYNA. Choose the dynamic current waveform and run the setting under Constant current mode. This key is only valid in CC mode and the LED aside this key will be on when in this status. SHORT The Load can simulate a short circuit across the input. The short circuit can be enabled when this key is pressed. When the input is shorted, the LED aside this key will be active. The SHORT key can be set in configuration to toggled on/off, or active by pressing. LOAD ON/OFF The input can be toggled on or off by pressing LOAD. When the input is turned on, the LED aside this key will be active. 6. Entry keys ▲, ▼ They let you scroll through the choices in a parameter list for a specific command. Parameter lists are circular. You can return to the starting position by pressing either key continuously. CLEAR To clear the digit entered from keypad. This key lets you correct wrong digits before they are entered. ENTER It executes the entered value or the parameter for the command accessed presently. The parameters you have entered with other keys are displayed but not entered into the Load until you press this key. Before pressing ENTER you can change or abort anything entered into the display previously. 0 - 9 They are used for entering numeric values. 4-3

. It is a decimal point. Rotary knob allows you to change the setting value continuously by turning this knob. 4.2.1 Setting the Operation Mode The CC, CR, CV, and CP keys are used to select the Load modes for local control. The load levels and slew rates are common to CC, CR, and CP modes. CV mode sets voltage level and response speed. There are two level settings for CC, CR, CV, and CP modes. They can be switched by the A/B key. Setting CC Values There are four modes for CC operation: CCL, CCH, CCDL, CCDH. The current levels are programmed in Amps. The slew rate levels are programmed in Amps/µS. The timings are programmed in millisecond. The setting buffers of four CC modes are independent. Changing the operation range doesn’t affect the settings of other ranges. The following examples show how to set the CC values for the Load model number 63203 channel. 1. Select mode Press CC key to go into the CC static mode. CCLA : 0.000A CCLB : 0.000A 2. Select range Press RANGE key to choose the high range constant current mode. CCHA : 0.00A CCHB : 0.00A If press RANGE again, it will go back to the low range constant current mode. 3. Set Current Level There are 4000 discrete steps from 0 to full scale in each range. Set level A current level to 200 amps by pressing 2, 0, 0, ENTER. Set level B current level to 5 amp by pressing 5, ENTER. CCHA : 200.00A CCHB : 5.00A 4-4

There are 250 discrete steps in each range. Set the rise 20 A/µS and fall slew rates to 0.5A/µS by pressing 2, 0, ENTER for rise and 0, . , 5 ENTER for fall slew rate. CCH : 20.0A/uS CCH : 0.5A/uS 5. Set Voltage spec Set the high voltage spec. to 6 V by pressing 6 , ENTER. CCH VOLTAGE SPEC. HIGH : 6.000V Set the low voltage spec. to 4 V by pressing 4 , ENTER. CCH VOLTAGE SPEC. LOW : 4.000V Then the display will go to the first editing page again. � Notice Spec. value can also be programmed by PERCENT under Configure setting. You have to input the CENTER Voltage, and then enter the HIGH and LOW percent to the center voltage. 6. Set dynamic current mode. Press DYNA key under CC mode, and select current range by RANGE key. Program the high current level to 50A by pressing 5, 0, ENTER keys. Program the low current level to 5A by pressing 5, ENTER keys. CCDL1: 50.000A CCDL2: 5.000A Then set the dynamic function period T1 to 0.1 mS, period T2 to 0.2 mS by pressing 0, . , 1, ENTER and 0, . , 2 , ENTER . The range of dynamic period is from 0.025 mS to 30 Sec. 4-5

CCDLT1: 0.100mS CCDLT2: 0.200mS The slew rate and Voltage Spec settings are same as those of static current mode. � Notice If you press ENTER key, and the blinked data do not go to next, change the configuration setting Enter Data Next to YES. Setting CR Values The Load CR mode is programmed by pressing CR. The resistance values can be programmed in low voltage (CRL) or high voltage (CRH) range. The current is always in high range. All resistance levels are programmed in ohm. The slew rate is in A/µS. Following examples illustrate how to set the CR values for Load model number 63203. 1. Select range Press RANGE key to choose the high range CR mode. CRHA : 500.000Ω CRHB : 500.000Ω If press RANGE again, it will go back to the low range CR mode 2. Set Resistance Level Set level A resistance level to 200 Ohm by pressing 2, 0, 0, ENTER. Set level B resistance level to 1 Ohm by pressing 1, ENTER. CRHA : 200.000Ω CRHB : 1.000Ω 3. Set Slew Rate Set the rise 20 A/µS and fall slew rates to 0.5A/µS by pressing 2, 0, ENTER for rise and 0, . , 5, ENTER for fall slew rate. CRH : 20.0A/uS CRH : 0.5A/uS 4-6

Set the high voltage spec. to 6 V by pressing 6 , ENTER. CRH VOLTAGE SPEC. HIGH : 6.000V Set the low voltage spec. to 4 V by pressing 4 , ENTER. CRH VOLTAGE SPEC. LOW : 4.000V Then the display will go to the first editing page again. Setting CV Values The CV mode for the Load is programmed by pressing CV. The voltage values can be programmed in low voltage (CVL) or high voltage (CVH) range. The current is always in high range. All voltage levels are programmed in Volt. The following examples illustrate how to set CV values for Load model number 63203. 1. Select range Press RANGE key to choose the low range CV mode. CVLA : 16.000V CVLB : 16.000V If press RANGE again, it will go back to the high range CV mode. 2. Set voltage Level Set level A voltage level to 10 V by pressing 1, 0, ENTER. Set level B voltage level to 8 V by pressing 8, ENTER. CVLA : 10.000V CVLB : 8.000V 3. Set Response Speed There are two response speeds for CV mode, fast and slow for different UUT testing. Refer to Figure 4-2 and 4-3 for transfer functions. 4-7

CVL RESPONSE 1: FAST 2. SLOW Press 2, ENTER to choose the slow response. Figure 4-2 CV Response Transfer Function (FAST) Figure 4-3 CV Response Transfer Function (SLOW) 4. Set Current spec Set the high current spec. to 8 A by pressing 8, ENTER. CVL CURRENT SPEC. HIGH : 8.000A Set the low current spec. to 4 A by pressing 4, ENTER. CVL CURRENT SPEC. LOW : 4.000A Then the display will go to the first editing page again. 4-8

The CP mode for the Load is programmed by pressing CP. The power values can be programmed in low current (CPL) or high current (CPH) range. All power levels are programmed in Walt. The slew rate is in A/µS. The following examples illustrate how to set CP values for Load model number 63203. 1. Select range Press RANGE key to choose the high range CP mode. CPHA : 12.000W CPHB : 12.000W If press RANGE again, it will go back to the low range CP mode 2. Set Power Level Set level A power level to 200 W by pressing 2, 0, 0, ENTER. Set level B power level to 4000 W by pressing 4, 0, 0, 0, ENTER. CPHA : 200.000W CPHB : 4000.000W 3. Set Slew Rate Set the rise 20 A/µS and fall slew rates to 0.5A/µS by pressing 2, 0, ENTER for rise and 0, . , 5, ENTER for fall slew rate. CPH : 20.0A/uS CPH : 0.5A/uS 4. Set Voltage spec Set the high voltage spec. to 6 V by pressing 6, ENTER. CPH VOLTAGE SPEC. HIGH : 6.000V Set the low voltage spec. to 4 V by pressing 4, ENTER. CPH VOLTAGE SPEC. LOW : 4.000V 4-9

Then the display will go to the first editing page again. 4.2.2 Setting the Program The Electronic Load is able to select customized basic tests, and link them to a program test for automatic execution. The PROG. key is used to select program or recall program for local control. There are ten programs (1-10). Each program has ten sequences to map files from 1 to 100. Program 1 maps files from 1 to 10. Table 4-1 shows the relationship between the program sequence and the corresponding file. Program 1 Sequence No. 1 2 3 4 5 6 7 8 9 10 Corresponding File No. 1 2 3 4 5 6 7 8 9 10 Program 2 Sequence No. 1 2 3 4 5 6 7 8 9 10 Corresponding File No. 11 12 13 14 15 16 17 18 19 20 : : Program 10 Sequence No. 1 2 3 4 5 6 7 8 9 10 Corresponding File No. 91 92 93 94 95 96 97 98 99 100 Table 4-1 The Relationship of the Program Sequence and the Corresponding File. When running a program you must set its corresponding file parameters first. If one program sequence is not enough for you to test the UUT, you can use program chain function to get more sequences. Press PROG. key, and the LCD will display as follows. Press number 1 -10 followed by ENTER to recall program from EEPROM, or use ▲, ▼ keys to edit the program. PROGRAM SELECT No: 1 1. Setting the Program Chain The chain function of program enables you to chain program so as to get more sequences for testing. Set program chain number to 0 means no program chained. Program chain function can chain itself for loop test, or other programs. Press 1, ENTER to chain itself for loop test. The default setting is 0. PROGRAM CHAIN No: 1 4-10

There are three modes to control the method of sequence execution. SKIP: Skip the sequence. Load will not change the input status. AUTO: Use ON/OFF time to control Load input on/off. When ON/OFF time passes, the Load will get to the next sequence automatically. MANUAL: Use ▲, ▼ or number 0 to 9 to control the execution sequence. Pressing number key lets you select a random sequence number to execute. Pressing 0 means to go to sequence 10. Press 2, ENTER keys to set sequence 1 to manual mode. You need to set ten sequence settings for one program. The default setting is SKIP. [ SEQ 1 ] 1: AUTO 0: SKIP 2: MANUAL 3. Setting the Sequence Load ON/OFF Time The sequence ON/OFF time controls the Load input ON/OFF when the program’s sequence is executed. The ON/OFF time range is 0 to 60 seconds. (30S each) Press 8, ENTER keys to set OFF time for 8 seconds. The default setting is 0 second for OFF time. 4. Setting the Short Delay/ON Time The range of short delay and on time is from 0 to 60 Sec. The short delay time starts from the beginning of the Load on time. If the short time is set to 0 Sec., the Load will not short. The default setting is 0 Sec. Press 8, ENTER to set SHORT on time for 8 seconds. SEQUENCE 1 SHORT DELAY : 0.0 S SEQUENCE 1 LOAD OFF TIME : 8.0 S SEQUENCE 1 LOAD ON TIME : 20.0 S 4-11

SEQUENCE 1 SHORT ON TIME : 8.0 S 5. Setting the Sequence P/F Delay/ON Time The sequence Pass/Failure Delay/ON time let you set the delay time for P/F checking and on time for how long it checks when load condition changes. The failure status of the sequence will latch when a program is executed. It means that any failure will be memorized even when the UUT becomes stable within the specifications later. The range of P/F delay and ON time is from 0 to 60 seconds. Press 1, ENTER to set the sequence P/F delay time for 1 second and then 5, ENTER for P/F on time for 5 seconds. Both default setting are 0 second. SEQUENCE 1 P / F DELAY : 1.0 S SEQUENCE 1 P / F ON TIME : 8.0 S 4.2.3 Running the Program Press LOAD ON/OFF to run program when the program function is selected. The display shows as below. PROG. 1 SEQ. 1 [ON ][ KEY ] [ PASS ] [ S ] The upper line shows the executed program and sequence number while the lower line shows the Load, key, test result and short status. ON/OFF: It shows the Load input status. KEY: It displays when MANUAL mode is active and waiting for key input. PASS/FAIL: It shows the test result compared with SPEC setting. S: It display if Load is Short now. When executing the program, the setting of sequence will recall files from EEPROM, and the SPEC function is always ON. All function keys are disabled until LOAD ON/OFF is pressed to stop the program execution, or the program run finishes. When the program run stops or finishes, the LCD will display as follows. PROGRAM OFF RESULT : PASS 4-12

as follows. PROG. XX Err. REPORT 1, 2, 3,…….10 PROG. XX indicates the file number of the program failed, 1 to 10. In addition, 1, 2, 3...10 shown by LCD stand for the failed sequence numbers. During program chain testing, if the failed program files are more than one set, you can use ▲, ▼ to read the contents of failed programs. 4.2.4 Setting the Specification The GO/NG key is to enable/disable specification checking function. The Load will compare measurement data with the set specifications for HIGH and LOW boundary when the SPEC TEST is ON, and the LED, GO/NG, is lighted on the panel. To set specifications for the load; please refer to the section 3.5 at the end of each mode for parameters setting. The specification unit for CC, CR, and CP modes is volt while CV mode is current. There are three levels for each mode: CENTER, HIGH and LOW. The CENTER level must be set by the value of channel input reference level. The HIGH and LOW levels can be set by the value or percentage selected in configuration SPEC.ENTRY MODE. The HIGH/LOW percentage range is from 0 to 100%. The default setting of HIGH and LOW is 100%. The CENTER value is half of the range. Please refer to section 4.2.5 for the specification selection set by Value or Percentage. 4.2.5 Setting the Configuration The Electronic Load provides useful features such as Von point, Current limit, Auto Load On, etc. To use these powerful features, you must set relevant parameters in accordance with application needs by the configuration setup. This procedure is only needed for initial setup of a test operation. The configuration of the Load is stored in EEPROM. To set configuration you must press the CONF key. Set the voltage range for CC, CP mode. There are two voltage ranges for CC or CP mode. High range is for high voltage and low range is for low voltage so as to get better voltage resolution. The default setting of V range is HIGH. CC, CP V RANGE SELECT 1: HIGH 2: LOW 4-13

Set Von point. Von is the conduction voltage level when the Electronic Load starts to sink current and the UUT output reaches the Von voltage. The default setting of Von voltage is 1V. Von POINT VOLTAGE = 1.000V Set Von latch. There are two operation modes for Von control. Von latch ON means that Load will sink current continuously when it reaches Von voltage. Von latch OFF means that Load will stop sinking current when UUT voltage is under Von voltage. The default setting of Von latch is OFF. Figure 4-4 and 4-5 show the Von LATCH ON and OFF current waveform respectively. Von LATCH ENABLE 1: YES 2: NO � CAUTION If Von is set to 0V, the Load circuit will be ON in spite of no UUT. This will get overshoot spike. If a UUT is applied, the overshoot may damage the UUT even though the Load current sets small. So, do not set Von to 0V. Figure 4-4 Von LATCH ON Current Waveform 4-14

Set CV mode CURR_LIMIT. This function will limit the Load current sinking to protect the UUT in CV mode. The default setting of current limit is the maximum Load current. CV CURRENT LIMIT CURRENT = 200.000A Set sign of voltage for display. The Electronic Load will show minus sign of the voltage if MINUS is selected. No sign will show if select PLUS. The default setting is PLUS. Selecting MINUS of SIGN OF VOLT. will occupy one digit. The displayed digits are five. SIGN OF VOLTAGE 1. PLUS 2. MINUS Set POWER/OHM for display. The right one of the three 7-segment LEDs can be selected to display POWER or OHM measurement data. The default setting is POWER. The LED “OHMS” will be lighted if you select OHM by pressing 2, ENTER. POWER / OHM SELECT 1: POWER 2: OHM Set the specifications of entry mode. The specifications of Load can be set by VALUE or Percentage for HIGH and LOW data. The percentage values refer to CENTER value of specification. The default setting of SPEC entry mode is percentage. 4-15

Select data entry mode by ENTER. If YES is selected for data entry, the setting will go to the next one after pressing ENTER. If NO is selected for data entry, the setting will remain at the same line for you to change it again and again. The default setting is NO. Select SOUND ENABLE. When you press the key on the module, it will produce a sound if sound = YES. The default setting for sound is YES. Select Load input status when it is powered ON. If YES is selected, the module will be active according to AUTO LOAD ON mode setting. The default setting of AUTO LOAD ON is NO. Select the load on mode if AUTO LOAD ON is ON. If LOAD is selected, the Load will be active as DEFAULT setting. If PROG is selected, the Load will be active as the program saved last time. The default setting of AUTO LOAD ON MODE is LOAD. Select short key mode. Set SHORT key mode for the Load. The default setting of SHORT mode is TOGGLE. Display the versions of host, load, and Panel. Press ▼ key and the display will show: WRTR: 00.85 BOOT: 00.85 MAIN: 00.85 SHORT KEY MODE 1: TOGGLE 2: HOLD AUTO LOAD ON MODE 1: PROG 2: LOAD AUTO LOAD ON 1: YES 2: NO SOUND ENABLE 1: YES 2: NO ENTER DATA NEXT 1: YES 2: NO SPEC. ENTRY MODE 1: VALUE 2: PCet 4-16

4.2.6 Recalling Files Press RECALL to recall files from 1 to 100. Files 1 to 100 are user data. File 101 is factor set state. After a file is recalled, the display will go to mode editor for you to edit or view the file. Pressing RECALL the display will show the file no. last recalled. The default file no. is 1 when the Load is powered on. Press RECALL, 3, ENTER to recall the number 3. The data of the Load will be recalled when you execute file recall. 4.2.7 Saving File/Default/Program There are 100 file locations (1 to 100) for you to save files. Press SAVE, 2, 0, ENTER to save a file to location 20. Press SAVE, ▲, ▼ until the display shows as follows. The DEFAULT states are used for Electronic Load after power-on. Press 1, ENTER to save DEFAULT to EEPROM. Press SAVE, ▲, ▼ until the display shows as follows. SAVE DEFAULT 1: YES 2: NO SAVE FILE FILE NO : 20 RECALL FILE FILE NO : 3 WRTR: 00.85 BOOT: 00.85 MAIN: 00.85 WRTR: 00.85 BOOT: 00.85 MAIN: 00.85 4-17

Press 1, ENTER to save program. SAVE PROGRAM 1: YES 2: NO 4.2.8 Going To Local The CONF./LOCAL key operates as local key when Electronic Load is in remote mode. You can press CONF./LOCAL key to go to local operation when Load is in remote state. In local operation, CONF./LOCAL key operates as CONF key. 4.2.9 Setting System and RS-232C Connection GPIB Address setting. Press 8, ENTER to set the Load GPIB address to 8. GPIB ADDRESS 8 RS485 Address setting. Press 3, ENTER to set the Load RS485 address to 3. This is for setting the models ID when used in parallel mode. RS485 ADDRESS 3 RS-232C parameters setting. There are four parameters for you to set: Baud Rate, Parity Check and Data Bit number. Baud Rate: 0:4800, 1:9600, 2:19200, 3:38400, 4:57600, 5: 115200 bits/second Parity Check: 0: NONE, 1: EVEN, 2: ODD Data Bit: 1: 7 bits, 2: 8 bits Stop Bit: 1: 1 bit, 2: 2 bits The RS-232C connector on the rear panel is a 9-pin connector (DB-9, male connector). The RS-232C connector bus signal is defined as below. 4-18

External wave Enable. The Load current can be controlled by the external DC voltage input via the Vext BNC connector on the rear panel if this function is selected 1: YES. The default is 2: NO. The Ext. Wave LED will be lighted when operating in this mode. EXT. WAVE ENABLE 1: YES 2: NO Parallel mode function. The Loads can be used in parallel to increase the loading power capacity. There is only one master in the parallel group, the rest are slaves. These Loads can be operated synchronized in static or dynamic mode via the master control. There are four different types for the Load to set in operation. There are maximum six models in parallel. PARALLEL = NONE PRESS 0 → 3 TO SELECT 0: NONE: Disable the parallel mode function. 1: MASTER: Used as the master for the parallel group, and this is the only one controlled by front panel or PC in this group. Not only do the synchronized operation, but also tell the slaves how many current they should sink. Measurement Display: Choose 1. SUM to show the total current on the master or 2. Sole to show the current the loads owned. SLAVE X MODEL: Press 0 → 6 to setup the slaves’ model to use in parallel. NONE means not exist. 2: SLAVE: Setup the Load as slave. 3: MASTER SYN: Same as 1: MASTER except this just do the SYNC parallel function, all the loading data of the slaves is decided by the front panel or PC input. 4-19

4.2.10 Online Change Level The Load provides you two ways for changing level online. They are convenient for you to change load directly with the rotary knob when LOADON. These two operation modes are described below. By Rotary knob: In LOADON, change load with the rotary knob in resolution unit. When the rotary knob rotates clockwise, it means as follows. CC mode: raise the current value. CR mode: raise the resistance value. CV mode: raise the voltage value. CP mode: raise the power value. When the rotary knob rotates counterclockwise, it means as follows. CC mode: lower the current value. CR mode: lower the resistance value. CV mode: lower the voltage value. CP mode: lower the power value. By CURSOR EDIT: In LOAD ON, press the mode key CC, CR, CV, or CP to make the display show numeric values for the setting. Press CURSOR EDIT to see the cursor blinking on the display. Press ▲, ▼ keys to move the cursor to the digit you want to edit. Change the value by rotary knob. Press the CURSOR EDIT key again to disable the cursor. 4-20

5. Basic Information for Programming 5.1 Introduction The following sections describe how to program the 63200 series electronic load remotely from a GPIB controller or RS232C. The command set introduced here can be applied to all 63200 series electronic loads including 63203, 63204, that equipped with GPIB or RS232C. Either GPIB or RS232C can be used one at a time. They cannot be used simultaneously. If GPIB is used first in remote control, RS-232C will be disabled unless the machine is reset, and vice versa. 5.1.1 Setting the GPIB Address and RS-232C Parameters The electronic load is shipped with the GPIB address set to 5. The address can be only changed via the “SYS” functional list menu (please see section 4.2.9). This menu is also used to select the RS-232C interface, and specify the parameters such as baud rate and parity. 5.1.2 Wire Connection of RS-232C The Electronic Load is shipped with the baud rate set to 115200, parity set to is None, and data length 8 bits, stop1 bit. For RS-232C interface, only TxD and RxD signals are used for data transfer. The RS-232C connector is a 9-pin D male connector. Following table shows you the RS-232C connector pins and signals. Pin No. Input/Output Description 1 --- +5V 2 INPUT RxD 3 OUTPUT TxD 4 OUTPUT DTR 5 --- GND 6 INPUT DSR 7 OUTPUT RTS 8 INPUT CTS 9 --- +5V The connection between the computer (IBM PC compatible) and the Electronic Load is illustrated below: 5-1

PIN 1 2 3 4 5 6 7 9 8 IBM PC DCD RX TX DTR GND DSR RTS RI CTS Electronic Load No Connection RX TX No Connection GND No Connection No Connection No Connection No Connection 5.2 GPIB Capability of the Electronic Load GPIB Capability Response Interface Functions Talker/Listener All electronic load functions are programmable over the GPIB. The electronic load can send and receive messages over the GPIB. Status information is sent using a serial poll. AH1, SH1, T6, L4 Service Request The electronic load will set the SRQ line true if there is an enabled service request condition. SR1 Remote/Local In local mode, the electronic load is controlled from the front panel but will also execute commands sent over the GPIB. The electronic load powers up in local mode and remains there until it receives a command over the GPIB. Once the electronic load is in remote mode, REMOTE will be shown on the front panel LCD, all front panel keys except LOCAL are disabled. Pressing LOCAL key on the front panel will return to local mode. Local can be disabled using local lockout, so only the controller or the power switch can return to local mode. RL1 5-2

5.3 RS-232C in Remote Control When you use RS-232C in remote control, you have to send the remote command CONFigure : REMote ON first to let control procedure enter into remote state, and then execute other command set. When control comes to an end, you have to send the command CONFigure : REMote OFF to let control procedure return to local operation mode. The RS-232C control commands are same as those of GPIB. When the RS-232C command string comes to an end for sending, should be added. Its ASCII code is 0A hexadecimal (or 10 decimal). 5-3

6. Introduction to Programming 6.1 Basic Definition GPIB statement includes instrument control and query commands. A command statement sends an instruction to the electronic load and query command request information from the electronic load. Simple Command A simple command statement consists of a command or keyword usually followed by a parameter or data: LOAD ON or LOAD:SHORT OFF Compound Command When two or more keywords are connected by colons (:), it creates a compound command statement. The last keyword usually is followed by a parameter or data: CURRent:STATic:L1 3 or CONFigure:VOLTage:RANGe H Query Command A simple query command consists of a keyword followed by a question mark: MEASure:VOLTage? MEASure:CURRent? or CHAN? Forms of Keywords Every keyword has two forms: Long-Form In this form, the word is spelled out completely to identify its function. For instance, CURRENT, VOLTAGE, and MEASURE are long-form keywords. Short-Form In this form, the word contains only the first three or four letters of the long-form. For instance, CURR, VOLT, and MEAS are short-form keywords. In keyword definitions and diagrams, the short-form part of each keyword is emphasized in UPPER CASE letters to help you remember it. However, the electronic load will accept Volt, volt, voltage, VOLTAGE, volTAGE, etc. regardless to which form you apply. If the keyword is incomplete, for example, “VOL” or “curre”, it will not be recognized. 6-1

6.2 Numerical Data Formats Chroma 63200 electronic load accepts the numerical data type listed in Table 2-1. Numeric data may be followed by a suffix to specify the dimension of the data. A suffix may be preceded by a multiplier. Chroma 63200 makes use of the suffixes listed in Table 2-2 and multipliers listed in Table 2-3. Symbol Description Example NR1 Digits with no decimal point. The decimal point is assumed to be to the right of the least-significant digit. 123, 0123 NR2 Digits with a decimal point. 123., 12.3, 0.123, .123 NR3 Digit with a decimal point and an exponent. 1.23E+3, 1.23E-3 NRf Flexible decimal form that includes NR1 or NR2 or NR3. 123, 12.3, 1.23E+3 NRf+ Expanded decimal form that includes NRf and MIN, MAX. MIN and MAX are the minimum and maximum limit values for the parameter. 123, 12.3, 1.23E+3, MIN, MAX Table 2-1 Numerical Data Type Mode Class Preferred Suffix Secondary Suffix Referenced Unit CC Current A Ampere CR Resistance OHM Ohm CV Amplitude V Volt CP Power W Watt ALL Time S Second ALL Slew Rate A/µS Amperes/micro Second Table 2-2 Suffix Elements Multiplier Mnemonic Definition 1E6 MA mega 1E3 K kilo 1E-3 M milli 1E-6 U Micro 1E-9 N Nano Table 2-3 Suffix Multipliers 6-2

6.3 Character Data Formats For command statements, the data format permits entry of required characters. For query statements, character strings may be returned in either of the forms shown in the following table. It depends on the length of the returned string. Symbol Character Form Crd Character Response Data. They permit the return up to 12 characters. aard Arbitrary ASCII Response Data. They permits the return of undelimited 7-bit ASCII. This data type is an implied message terminator (refer to Separators and Terminators). 6.4 Separators and Terminators In addition to keywords and parameters, GPIB program statements require the following: Data Separators: Data must be separated from the previous command keyword by a space. This is shown in examples as a space (CURR 3) and on diagrams by the letters SP inside a circle. Keyword Separators: Keywords (or headers) are separated by colon (:), semicolon (;), or both. For example: � LOAD:SHOR ON � MEAS:CURR?;VOLT? � CURR:STAT:L1 3;:VOLT:L1 5 Program Line Separators: A terminator to inform GPIB that it has reached the end of a statement. Normally, this is sent automatically by your GPIB programming statements. Termination also occurs with other terminator codes, such as EOI. In this manual, the terminator is assumed at the end of each example line of code. If it needs to be indicated, it is shown by the symbol , which indicates “new line” and represents the ASCII coded byte as 0A hexadecimal (or 10 decimal). Traversing the Command Tree: � The colon “:” separates keywords from each other which represents changes in branch level to the next lower one. For example: CONF:VOLT:ON 5 CONF is a root-level command, VOLT is the first branch, and ON is the second branch. Each “:” moves the command interpretation downward to the next branch. � The semicolon “;” allows you to combine command statements into one line. It returns the command interpretation to the previous colon. 6-3

For example: Combine the following two command statements: RES:RISE 100 and RES:L1 400 which can be formed into one command line as follows: RES:RISE 100;L1 400 5. To return to the root-level form you can 1. Enter a new-line character. This is symbolized as “” and can be linefeed “LF” or/and end-of-line “EOL”. Or else, 2. Enter a semicolon followed by a colon “;:”. Please refer to the following figure. 1. (root):VOLT:L1: 30 Starting a New Line to return to the Root. 2. (root):SPEC:VOLT:H 30; :L 5;: (root)RES:L1 400; :RISE 1000;: 6-4

Each command belonging to the same subsystem is arranged in alphabetic order. A syntax chart of the subsystem that contains the commands in the same group is included. Sub- systems are ordered alphabetically according to their names in the following sections. 7.1.1 Common Commands Common commands defined by the IEEE488.2 standard are generic commands and queries. The first part of the language dictionary covers the commands. Each of them has a leading “*”. Common Commands Syntax *CLS Clear status *ESE Standard event status enable *ESE? Return standard event status enable *ESR? Return event status enable *IDN? Return instrument identification *OPC Enable “operation complete” bit in ESR *OPC? Return a “1” when operation complete *RCL Recall instrument state *RST Reset *SAV Save instrument state *SRE Set service request enable register *SRE? Return service request enable register *STB? Return status byte 7.1.2 Common Command Dictionary *CLS Clear Status Command Description This command clears the following actions: 1. Clear Questionable Status Event register 2. Clear Standard Event Status Event register 3. Clear Status Byte 4. Clear the Error Queue Syntax *CLS Parameters None 7-1

*ESE Standard Event Status Enable Command/Query Description This command sets the condition of the Standard Event Status Enable register to determine which event the Standard Event Status Event register (see *ESR?) is allowed to set the ESB (Event Summary Bit) for the Status Byte register. A "1" in the bit position enables the corresponding event. All the events enabled by Standard Event Status Event register are logically ORed to cause the ESB (bit 5) of the Status Byte register to be set. See the descriptions of these registers in Chapter 8 Status Reporting. Syntax *ESE Parameters 0 to 255 Example *ESE 48 This command enables the CME and EXE events for the Standard Event Status Event register. Query Syntax *ESE? Return Parameters Query Example *ESE? This query returns the current setting for "Standard Event Status Enable". *ESR? Standard Event Status Register Query Description This query reads the Standard Event Status register. Reading the register clears it. See detailed explanation of this register in Chapter 8 Status Reporting. Bit Configuration of Standard Event Status Event Register Bit Position 7 6 5 4 3 2 1 0 Bit Name 0 0 CME EXE DDE QYE 0 OPC Bit Weight 128 64 32 16 8 4 2 1 CME = Command error DDE = Device-dependent error EXE = Execution error OPC = Operation complete QYE = Query error Query Syntax *ESR? Return Parameters Query Example *ESR? Return the Standard Event Status Register readings. Return Example 48 *IDN? Identification Query Description This query requests the Electronic Frame (632xx) to identify itself. Query Syntax *IDN? Return Parameters Query Example *IDN? String Information Chroma Manufacture 632xx Model name 12345678 Serial number 01.00 Firmware version 7-2

*OPC Operation Complete Command Description This command causes the interface to set the OPC bit (bit 0) of the Standard Event Status register when the Electronic Frame (6320) has completed all pending operations. Syntax *OPC Parameters None *OPC? Operation Complete Query Description This query returns an ASCII “1” when all pending operations are completed. Query Syntax *OPC? Return Parameters Query Example 1 *RCL Recall Instrument State Command Description This command restores the electronic load to a state that was previously stored in memory with *SAV command to the specified location (see *SAV). Syntax *RCL Parameters 1 to 100 Example *RCL 50 *RST Reset Command Description This command forces an ABORt, *CLS, LOAD:PROT:CLE command. Syntax *RST Parameters None *SAV Save Command Description This command stores the present state of electronic load in a specified location in memory. Syntax *SAV Parameters 1 to 100 Example *SAV 50 *SRE Service Request Enable Command/Query Description This command sets the condition of the Service Request Enable register to determine which event of the Status Byte register (see *STB) is allowed to set the MSS (Master Status Summary) bit. A "1" in the bit position enabled by bits is logically ORed to cause Bit 6 (the Master Summary Status Bit) of the Status Byte register to be set. See details regarding the Status Byte register in Chapter 8 Status Reporting. Syntax *SRE 7-3

Parameters 0 to 255 Example *SRE 24 Enable the QUES and MAV bit of the Service Request Enable Query Syntax *SRE? Return Parameters Query Example *SRE? Return the current setting for "Service Request Enable". *STB? Read Status Byte Query Description This query reads the Status Byte register. Note that the MSS (Master Summary Status) bit is returned in Bit 6 instead of RQS bit. This bit indicates if the electronic load has at least one reason for requesting service. *STB? does not clear the Status Byte register. It is cleared only when subsequent action has cleared all bits set. Refer to Chapter 8 Status Reporting for more information about this register. Bit Configuration of Standard Byte Register Bit Position 7 6 5 4 3 2 1 0 Bit Name 0 MSS RQS ESB MAV QUES 0 0 0 Bit Weight 128 64 32 16 8 4 2 1 MSS = master status summary ESB = event status byte summary RQS = request for service QUES = questionable status summary MAV = message available Query Syntax *STB? Return Parameters Query Example *STB? Return the contents of "Status Byte". Return Example 24 7.2 Specific Commands The 63200 series products are built-in with the following specific GPIB commands. 7-4

Syntax CONFigure:AUTO:LOAD Parameters 0 | OFF, 1 | ON Example CONF:AUTO:LOAD ON Start Auto Load On during power on. CONF:AUTO:LOAD OFF Close Auto Load On during power on. Query Syntax CONFigure:AUTO:LOAD? Return Parameters 0 | 1 Query Example CONF: AUTO: LOAD? Return Example 0 (OFF) Return the status of Auto Load On CONFigure:AUTO:MODE Description Set type of Auto Load On as LOAD ON or PROGRAM ON. Syntax CONFigure:AUTO:MODE Parameters 0 | PROGRAM, 1 | LOAD Example CONF:AUTO:MODE LOAD Set Auto Load On as general Load On. CONF:AUTO:MODE PROGRAM Set Auto Load On as Program On. Query Syntax CONFigure:AUTO:MODE? Return Parameters 0 | 1 Query Example CONF:AUTO:MODE? Return the execution type of Auto Load On. Return Example 0 ( PROGRAM) CONFigure:DISPlay Description Set measure display mode Command Syntax CONFigure:DISPlay 7-5

Parameters 0 | RESISTANCE, 1 | POWER Example CONF:DISP POWER Set the power display mode. CONF:DISP 0 Set resistance display mode. Query Syntax CONFigure:DISPlay? Return Parameters 0 | 1 Query Example CONF:DISP? Return the execution type of display mode. Return Example 1 (POWER) CONFigure:KEY Description Set enter data key mode Command Syntax CONFigure:KEY Parameters 0 | NEXT, 1 | HOLD Example CONF:KEY 0 Set enter data next mode. CONF:KEY HOLD Set enter data hold mode. Query Syntax CONFigure:KEY? Return Parameters 0 | 1 Query Example CONF:KEY? Return the execution type to enter data mode. Return Example 0 ( NEXT ) CONFigure:REMote Description Set the status of remote control (only effective in RS232C). Syntax CONFigure:REMote Parameters 0 | OFF, 1 | ON Example CONF:REM ON Set to remote control. CONFigure:SAVE Description Store CONFigure data into EEPROM. Syntax CONFigure:SAVE Parameters None Example CONF:SAVE CONFigure:SOUNd Description Set the buzzer sound ON/OFF. Syntax CONFigure:SOUNd Parameters 0 | OFF, 1 | ON Example CONF:SOUN 0 CONF:SOUN OFF Query Syntax CONFigure:SOUNd? Return Parameters 0 | 1 Query Example CONF:SOUN? Return the control status of the buzzer sound. Return Example : 0 (OFF ) CONFigure:VOLTage:LATCh Description Set the action type to Von. Syntax CONFigure:VOLTage:LATch Parameters 0 | OFF, 1 | ON Example CONF:VOLT:LAT 1 Set the action type to Von as Latch. 7-6

(Refer to the former part of this manual for detailed). Query Syntax CONFigure:VOLTage:LATCh? Return Parameters 0 | 1 Query Example CONF:VOLT:LAT? Return the action type to Von. Return Example 0 (OFF) CONFigure:VOLTage:LATCh:RESet Description Reset Von signal. Syntax CONFigure:VOLTage:LATCh:RESet Parameters None Example CONF:VOLT:LATC:RES CONFigure:VOLTage:ON Description Set the voltage of sink current to on. Syntax CONFigure:VOLTage:ON [suffix] Parameters For valid voltage range refer to respective specification. Example CONF:VOLT:ON 1 Set Von=1V. CONF:VOLT:ON 300mV Set Von=300mV. Query Syntax CONFigure:VOLTage:ON? Return Parameters [Unit=Voltage] Query Example CONF:VOLT:ON? Return the setting of Von value. Return Example 3.5 CONFigure:VOLTage:POLarity Description Set the voltage display polarity. Syntax CONFigure:POLarity Parameters 0 | MINUS, 1 | PLUS, Example CONF:POL 0 Set voltage display to minus. CONF:POL PLUS Set voltage display to plus. Query Syntax CONFigure:POLarity? Return Parameters 0 | 1 Query Example CONF:POL? Return the display polarity. Return Example 0 ( MINUS ) CONFigure:VOLTage:RANGe Description Set voltage measurement range in CC mode. Syntax CONFigure:VOLTage:RANGEe Parameters 0 | L, 1 | H Example CONF:VOLT:RANG 1 Set full-range to High. CONF:VOLT:RANG L Set full-range to Low. Query Syntax CONFigure:VOLTage:RANGe? Return Parameters 0 | 1 Query Example CONF:VOLT:RANG? Return Voltage range. Return Example 1 ( H ) 7-7

7.2.2 COMMunicate Sub-system COMMunicate :ADDRess :GPIB :RS485 :SERial :BAUD :BITS :PARity :SBITs COMMunicate:ADDRess:GPIB Description Set the GPIB address Syntax COMMunicate:ADDRess:GPIB Parameters 1 – 30 Example COMM:ADDR:GPIB 16 Query Syntax COMMunicate:ADDRress:GPIB? Return Parameters Query Example COMM:ADDR:GPIB? Return GPIB address. Return Example 16 COMMunicate:ADDRess:RS485 Description Set the RS485 address Syntax COMMunicate:ADDRess:RS485 Parameters 1 – 5 Example COMM:ADDR:RS485 5 Query Syntax COMMunicate:ADDRress:RS485? Return Parameters Query Example COMM:ADDR:RS485? Return RS485 address. Return Example 5 COMMunicate:SERial:BAUD Description Set the baud rate Syntax COMMunicate:SERial:BAUD Parameters 0 | BAUD_48, 1 | BAUD_96, 2 | BAUD_192, 3 | BAUD_384, 4 | BAUD_576, 5 | BAUD_1152 Example COMM: SER:BAUD 5 COMM: SER:BAUD_1152 Query Syntax COMMunicate:SERial:BAUD? Return Parameters 0 | 1 | 2 | 3 | 4 | 5 Query Example COMM:SER:BAUD? Return RS232 baud rate. Return Example 5 ( BAUD_1152 ) 7-8

Syntax COMMunicate:SERial:BITS Parameters 0 | BITS_8, 1 | BITS_7 Example COMM: SER:BITS 0 COMM: SER:BITS BITS_8 Query Syntax COMMunicate:SERial:BITS? Return Parameters 0 | 1 Query Example COMM:SER:BITS? Return RS232 data bits parameter. Return Example 0 ( BITS_8) COMMunicate:SERial:PARity Description Set the parity scheme that is to be used for transmission Syntax COMMunicate:SERial:PARity Parameters 0 | NONE, 1 | EVEN, 2 | ODD Example COMM: SER:PAR 0 COMM: SER:PAR NONE Query Syntax COMMunicate:SERial:PARity? Return Parameters 0 | 1 | 2 Query Example COMM:SER:PAR? Return RS232 bits parameter. Return Example 0 ( NONE ) COMMunicate:SERial:SBITs Description Set the number of the stop bits Syntax COMMunicate:SERial:SBITs Parameters 0 | SBITS_2, 1 | SBITS_1 Example COMM: SER:SBITS 0 COMM: SER:SBIT SBITS_2 Query Syntax COMMunicate:SERial:SBITs? Return Parameters 0 | 1 Query Example COMM:SER:SBIT? Return RS232 stop bits parameter. Return Example 0 7-9

7.2.3 CURRENT Sub-system CURRent :STATic :L1 :L2 :RISE :FALL :DYNamic :L1 :L2 :RISE :FALL :T1 :T2 CURRent:STATic:L1/L2 Description Set Static Load Current to constant current mode. Syntax CURRent:STATic:L1 [suffix] CURRent:STATic:L2 [suffix] Parameters For valid value range refer to respective specification. Example CURR:STAT:L1 20 Set Constant Current = 20A for Static Load L1. CURR:STAT:L2 10 Set Constant Current = 10A for Static Load L2. CURR:STAT:L1 MAX Set Constant Current = maximum value for Static Load L1. CURR:STAT:L2 MIN Set Constant Current = minimum value for Static Load L2. Query Syntax CURRent:STATic:L1? CURRent:STATic:L2? CURRent:STATic:L1? MAX CURRent:STATic:L2? MIN Return Parameters [Unit=Ampere] Query Example CURR:STAT:L1? Return the set current value of Static Load L1. Return Example 3.12 CURRent:STATic:RISE/FALL Description Set the current slew rate for constant current static mode. Syntax CURRent:STATic:RISE [suffix] CURRent:STATic:FALL [suffix] Parameters For valid value range refer to respective specification. Example CURR:STAT:RISE 2.5 Set rise slew rate to 2.5A/µS for static load. 7-10

static load. Query Syntax CURRent:STATic:RISE? CURRent:STATic:FALL? CURRent:STATic:RISE? MAX CURRent:STATic:FALL? MIN Return Parameters [Unit=A/µS] Query Example CURR:STAT:RISE? Return the rise slew rate of static load. Return Example 2.5 CURRent:DYNamic:L1/L2 Description Set Dynamic Load Current during constant current mode. Syntax CURRent:DYNamic:L1 [suffix] CURRent:DYNamic:L2 [suffix] Parameters For valid value range refer to respective specification. Example CURR:DYN:L1 20 Set dynamic load parameter L1 = 20A. CURR:DYN:L2 10 Set dynamic load parameter L2 = 10A. CURR:DYN:L1 MAX Set dynamic load parameter L1 = max. value CURR:DYN:L2 MIN Set dynamic load parameter L2 = min. value. Query Syntax CURRent:DYNamic:L1? CURRent:DYNamic:L2? CURRent:DYNamic:L1? MAX CURRent:DYNamic:L2? MIN Return Parameters [Unit=Ampere] Query Example CURR:DYN:L1? Return the setting current in dynamic load L1. Return Example 35.6 CURRent:DYNamic:RISE/FALL Description Set current slew rate of constant current dynamic mode. Syntax CURRent:DYNamic:RISE [suffix] CURRent:DYNamic:FALL [suffix] Parameters For valid value range refer to respective specification. Example CURR:DYN:RISE 2.5 Set rise slew rate to 2.5A/µS. CURR:DYN:FALL 1A/µS Set fall slew rate to 1A/µS. CURR:DYN:RISE MAX Set rise slew rate to the maximum value of dynamic load. CURR:DYN:FALL MIN Set fall slew rate to the minimum value of dynamic load. Query Syntax CURRent:DYNamic:RISE? CURRent:DYNamic:FALL? CURRent:DYNamic:RISE? MAX CURRent:DYNamic:FALL? MIN Return Parameters [Unit=A/µS] Query Example CURR:DYN:RISE? Return the rise slew rate of dynamic 7-11

load. Return Example 2.5 CURRent:DYNamic:T1/T2 Description Set the duration parameter T1 or T2 for dynamic load. Syntax CURRent:DYNamic:T1 [suffix] CURRent:DYNamic:T2 [suffix] Parameters For valid value range refer to respective specification. Example CURR:DYN:T1 10mS Set dynamic duration T1 = 10mS. CURR:DYN:T2 2S Set dynamic duration T2 = 2S. CURR:DYN:T1 MAX Set dynamic duration T1 to the maximum value. CURR:DYN:T2 MIN Set dynamic duration T2 to the minimum value. Query Syntax CURRent:DYNamic:T1? CURRent:DYNamic:T2? CURRent:DYNamic:T1? MAX CURRent:DYNamic:T2? MIN Return Parameters [Unit=Sec] Query Example CURR:DYN:T1? Return the dynamic duration parameter T1. Return Example 0.15 7-12

Query Syntax FETCh:CURRent? Return Parameters [Unit=Ampere] Query Example FETC:CURR? Return Example 3.15 FETCh:POWer? Description Return the power measured at the input of the load. Query Syntax FETCh:POWer? Return Parameters [Unit=Watt] Query Example FETC:POW? Return Example 3.15 FETCh:RESistance? Description Return the resistance measured at the input of the load Query Syntax FETCh:RESistance? Return Parameters [Unit=OHM] Query Example FETC:RSE? Return Example 10.22 FETCh:VOLTage? Description Return the voltage measured at the input of the load. Query Syntax FETCh:VOLTage? Return Parameters [Unit=Voltage] Query Example FETC:VOLT? Return Example 8.12 FETCh:STATus? Description Return the real time status of the load. Query Syntax FETCh:STATus? Return Parameters 7-13

Bit Position 15 14 13 12 11 10 9 8 Condition ╳ PR RS FF ╳ ╳ ╳ SP Bit Weight ╳ 16384 8192 4096 ╳ ╳ ╳ 256 Bit Position 7 6 5 4 3 2 1 0 Condition PF ST LD OT RV OP OV OC Bit Weight 128 64 32 16 8 4 2 1 Query Example FETC:STAT? Read back the present status of the load. Return Example 4 7-14

Syntax LOAD:[STATe] Parameters 0 | OFF, 1 | ON Example LOAD ON Activate the electronic load. LOAD OFF Inactivate the electronic load. Query Syntax LOAD:[STATe]? Return Parameters 0 | 1 Query Example LOAD? Return if the electronic load is active. Return Example 1 (ON) LOAD:SHORt[:STATe] Description Activate or inactivate short-circuited simulation. Syntax LOAD:SHORt:[STATe ] Example LOAD:SHOR 1 Activate short-circuited simulation. LOAD:SHOR OFF Inactivate short-circuited simulation. Parameters 0 | OFF, 1 | ON Query Syntax LOAD:SHORt:[STATe]? Return Parameters 0 | 1 Query Example LOAD:SHOR? Return the short-circuit simulation state. Return Example 1 (ON) LOAD:SHORt:KEY Description Set the short key mode in the electronic load. Syntax LOAD:SHORt:KEY TOGGLE Parameters 0 | HOLD, 1 | TOGGLE Example LOAD:SHOR:KEY TOGGLE Set short key mode to Toggle. LOAD:SHOR:KEY 0 Set short key mode to Hold. Query Syntax LOAD:SHORt:KEY? Return Parameters 0 | 1 Query Example LOAD:SHOR:KEY? Return the short key mode in the electronic load. Return Example 1 (TOGGLE) LOAD:PROTection? 7-15

Description This command returns the status of the electronic load. Query Syntax LOAD:PROTection:CLEar? Return Parameters Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Condition 0 0 0 0 0 0 0 0 0 0 0 OT RV OP OV OC Bit Weight 16 8 4 2 1 Query Example LOAD:PROT? Return the status of the electronic load. Return Example 0 LOAD:PROTection:CLEar Description This command resets status of the electronic load. Syntax LOAD:PROTection:CLEar Parameters For valid value range refer to respective specification. Example LOAD:PROT:CLE LOAD:SAVE Description This command saves the present state of electronic load as default. Syntax LOAD:SAVE Parameters None Example LOAD:SAVE 7-16

load. Query Syntax MEASure:CURRent? Return Parameters [Unit=Amper] Query Example MEAS:CURR? Return Example 3.15 MEASure:INPut Description Select the input port of the electronic load to measure voltage. Syntax MEASure:INPut Parameters 0 | LOAD, 1 | UUT Example MEAS:INP UUT MEAS:INP LOAD Query Syntax MEASure:INPut? Return the input port that has been set. Return Parameters 0 | 1 Query Example MEAS:INP? Return Example 0 (LOAD) MEASure:RESistance? Description Return the real time resistance measured at the input of the electronic load. Query Syntax MEASure:RESistance? Return Parameters [Unit=OHM] Query Example MEAS:RES? Return Example 8.12 MEASure:POWer? Description Return the real time power measured at the input of the electronic load. Query Syntax MEASure:POWer? Return Parameters [Unit=Watt] Query Example MEAS:POW? Return Example 8.12 MEASure:VOLTage? 7-17

Description Return the real time voltage measured at the input of the electronic load. Query Syntax MEASure:VOLTage? Return Parameters [Unit=Voltage] Query Example MEAS:VOLT? Return Example 8.12 7-18