ITech IT8700 Series Operation & User’s Manual

Loads Series IT8700 User Manual Model: IT8722/IT8723/IT8731/IT8732/IT8733/ IT8722B/IT8732B/IT8733B/IT8701/IT8702/IT8703 Version: 4.2

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior permission and written consent from Itech Electronic, Co., Ltd. as governed by international copyright laws. Manual Part Number IT8700-402216 Revision Fourth Edition, Jan. 21, 2019 Itech Electronic, Co., Ltd. Trademarks Pentium is U.S. registered trademarks of Intel Corporation. Microsoft, Visual Studio, Windows and MS Windows are registered trademarks of Microsoft Corporation in the United States and/or other countries and regions. Warranty The materials contained in this document are provided “as is”, and is subject to change, without prior notice, in future editions. Further, to the maximum extent permitted by applicable laws, ITECH disclaims all warrants, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. ITECH shall not be held liable for errors or for incidental or indirect damages in connection with the furnishing, use or application of this document or of any information contained herein. Should ITECH and the user enter into a separate written agreement with warranty terms covering the materials in this document that conflict with these terms, the warranty terms in the separate agreement shall prevail. Technology Licenses The hardware and/or software described herein are furnished under a license and may be used or copied only in accordance with the terms of such license. Restricted Rights Legend Restricted permissions of the U.S. government. Permissions for software and technical data which are authorized to the U.S. Government only include those for custom provision to end users. ITECH follows FAR 12.211 (technical data), 12.212 (computer software). DFARS 252.227-7015 (technical data--commercial products) for national defense and DFARS 227.7202-3 (permissions for commercial computer software or computer software documents) while providing the customized business licenses of software and technical data. Safety Notices A CAUTION sign denotes a hazard. It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met. A WARNING sign denotes a hazard. It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met. NOTE A NOTE sign denotes important hint. It calls attention to tips or supplementary information that is essential for users to refer to.

Copyright © Itech Electronic Co., Ltd. i Quality Certification and Assurance We certify that series IT8700 electronic load meets all the published specifications at time of shipment from the factory. Warranty ITECH warrants that the product will be free from defects in material and workmanship under normal use for a period of one (1) year from the date of delivery (except those described in the Limitation of Warranty below). For warranty service or repair, the product must be returned to a service center designated by ITECH.  The product returned to ITECH for warranty service must be shipped PREPAID. And ITECH will pay for return of the product to customer.  If the product is returned to ITECH for warranty service from overseas, all the freights, duties and other taxes shall be on the account of customer. Limitation of Warranty This Warranty will be rendered invalid in case of the following:  Damage caused by circuit installed by customer or using customer own products or accessories;  Modified or repaired by customer without authorization;  Damage caused by circuit installed by customer or not operating our products under designated environment;  The product model or serial number is altered, deleted, removed or made illegible by customer;  Damaged as a result of accidents, including but not limited to lightning, moisture, fire, improper use or negligence. Safety Symbols Direct current ON (power on) Alternating current OFF (power off) Both direct and alternating current Power-on state Protective conductor terminal Power-off state Earth (ground) terminal Reference terminal Caution, risk of electric shock Positive terminal Warning, risk of danger (refer to this manual for specific Warning or Caution information) Negative terminal Frame or chassis terminal - -

Copyright © Itech Electronic Co., Ltd. ii Safety Precautions The following safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or specific warnings elsewhere in this manual will constitute a default under safety standards of design, manufacture and intended use of the instrument. ITECH assumes no liability for the customer’s failure to comply with these precautions.  Do not use the instrument if it is damaged. Before operation, check the casing to see whether it cracks. Do not operate the instrument in the presence of inflammable gasses, vapors or dusts.  The electronic load is provided with a three-core power line during delivery and should be connected to a three-core junction box. Before operation, be sure that the instrument is well grounded.  Make sure to use the power cord supplied by ITECH.  Check all marks on the instrument before connecting the instrument to power supply.  Use electric wires of appropriate load. All loading wires should be capable of bearing maximum short-circuit current of electronic load without overheating. If there are multiple electronic loads, each pair of the power cord must be capable of bearing the full-loaded rated short-circuit output current  Ensure the voltage fluctuation of mains supply is less than 10% of the working voltage range in order to reduce risks of fire and electric shock.  Do not install alternative parts on the instrument or perform any unauthorized modification.  Do not use the instrument if the detachable cover is removed or loosen.  To prevent the possibility of accidental injuries, be sure to use the power adapter supplied by the manufacturer only.  We do not accept responsibility for any direct or indirect financial damage or loss of profit that might occur when using the instrument.  This instrument is used for industrial purposes, do not apply this product to IT power supply system.  Never use the instrument with a life-support system or any other equipment subject to safety requirements.  Failure to use the instrument as directed by the manufacturer may render its protective features void.  Always clean the casing with a dry cloth. Do not clean the internals.  Make sure the vent hole is always unblocked.

Copyright © Itech Electronic Co., Ltd. iii Environmental Conditions The instrument is designed for indoor use and an area with low condensation. The table below shows the general environmental requirements for the instrument. The speed of fan will change intelligently by the temperature of radiator. When the temperature is up to 40°C, the fan will be on and adjust intelligently when temperature changes. Environmental Conditions Requirements Operating temperature 0°C to 40°C Operating humidity 20%-80% (non-condensation) Storage temperature -20°C to 70 °C Altitude Operating up to 2,000 meters Pollution degree Pollution degree 2 Installation category II Note To make accurate measurements, allow the instrument to warm up for 30 min before operation. Regulatory Markings The CE mark indicates that the product complies with all the relevant European legal directives. The specific year (if any) affixed refers to the year when the design was approved. The instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard the electrical/electronic product in domestic household waste. This symbol indicates the time period during which no hazardous or toxic substances are expected to leak or deteriorate during normal use. The expected service life of the product is 10 years. The product can be used safely during the 10-year Environment Friendly Use Period (EFUP). Upon expiration of the EFUP, the product must be immediately recycled. Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC Waste Electrical and Electronic Equipment (WEEE) Directive This product complies with the WEEE Directive (2002/96/EC) marking requirement. This affix product label indicates that you must not discard the electrical/electronic product in domestic household waste. Product Category

Copyright © Itech Electronic Co., Ltd. iv With reference to the equipment classifications described in the Annex I of the WEEE Directive, this instrument is classified as a “Monitoring and Control Instrument”. To return this unwanted instrument, contact your nearest ITECH office.

Copyright © Itech Electronic Co., Ltd. v Compliance Information Complies with the essential requirements of the following applicable European Directives, and carries the CE marking accordingly:  Electromagnetic Compatibility (EMC) Directive 2014/30/EU  Low-Voltage Directive (Safety) 2014/35/EU Conforms with the following product standards: EMC Standard IEC 61326-1:2012/ EN 61326-1:2013 ¹²³ Reference Standards CISPR 11:2009+A1:2010/ EN 55011:2009+A1:2010 (Group 1, Class A) IEC 61000-4-2:2008/ EN 61000-4-2:2009 IEC 61000-4-3:2006+A1:2007+A2:2010/ EN 61000-4-3:2006+A1:2008+A2:2010 IEC 61000-4-4:2004+A1:2010/ EN 61000-4-4:2004+A1:2010 IEC 61000-4-5:2005/ EN 61000-4-5:2006 IEC 61000-4-6:2008/ EN 61000-4-6:2009 IEC 61000-4-11:2004/ EN 61000-4-11:2004 1. The product is intended for use in non-residential/non-domestic environments. Use of the product in residential/domestic environments may cause electromagnetic interference. 2. Connection of the instrument to a test object may produce radiations beyond the specified limit. 3. Use high-performance shielded interface cable to ensure conformity with the EMC standards listed above. Safety Standard IEC 61010-1:2010/ EN 61010-1:2010

Copyright © Itech Electronic Co., Ltd. vi Content DC Programmable Electronic Loads ......................................................................................................... 1 Quality Certification and Assurance .......................................................................................................... 1 Warranty .................................................................................................................................................... 1 Limitation of Warranty ................................................................................................................................ 1 Safety Symbols .......................................................................................................................................... 1 Safety Precautions .................................................................................................................................... 2 Environmental Conditions .......................................................................................................................... 3 Regulatory Markings .................................................................................................................................. 3 Waste Electrical and Electronic Equipment (WEEE) Directive .................................................................. 3 Compliance Information ............................................................................................................................. 5 Chapter1 Inspection and Installation .................................................................................................. 1 1.1 Verifying the Shipment ......................................................................................................................... 1 1.2 Module installation ............................................................................................................................... 1 1.2.1 Channel number ........................................................................................................................... 2 1.3 Mainframe installation .......................................................................................................................... 3 1.3.1 Installation Size Introduction ......................................................................................................... 3 1.4 Connecting the Power Cord ................................................................................................................ 7 Chapter2 Quick Start............................................................................................................................. 9 2.1 Brief Introduction ................................................................................................................................. 9 2.2 Introduction ........................................................................................................................................ 10 2.3 Front Pannel Introduction .................................................................................................................. 11 2.4 Rear panel description ....................................................................................................................... 11 2.5 Power-on Selftest .............................................................................................................................. 12 Chapter3 Panel function introduction ............................................................................................... 14 3.1 Mainframe operation .......................................................................................................................... 14 3.1.1 Mainframe keyboard functions introduction ................................................................................ 14 3.1.2 Menu list...................................................................................................................................... 15 3.1.3 Channel option ............................................................................................................................ 20 3.1.4 Save and recall ........................................................................................................................... 20 3.1.5 Configuration menu introduction ................................................................................................. 20 3.1.6 Module keyboard lock ................................................................................................................. 20 3.2 Module operation ............................................................................................................................... 21 3.2.1 Single channel module panel...................................................................................................... 21 3.2.2 Dual channel module panel ........................................................................................................ 21 3.3 VFD indicator function description ..................................................................................................... 22 3.4 8-pin control connector ...................................................................................................................... 23 3.4.1 External trigger connections ....................................................................................................... 24 3.4.2 External ON/OFF control connection .......................................................................................... 24 3.5 Extended frame connections ............................................................................................................. 25 3.6 Controlling link ................................................................................................................................... 25 3.6.1 Voltage failure indication ............................................................................................................. 26 3.6.2 Current monitoring ...................................................................................................................... 26 3.6.3 Digital I/O .................................................................................................................................... 26 3.6.4 Remote measurement connection .............................................................................................. 26 3.6.5 External analogue control ........................................................................................................... 27 3.7 Load connection ................................................................................................................................ 27 3.8 Parallel connections .......................................................................................................................... 28 Chapter4 Operations introduction ..................................................................................................... 29 4.1 Local/remote operation ...................................................................................................................... 29 4.2 PC control connection ....................................................................................................................... 29 4.3 Operating modes ............................................................................................................................... 29 4.3.1 Constant current (CC) mode....................................................................................................... 30 4.3.2 Constant resistance (CR) mode ................................................................................................. 31 4.3.3 Constant voltage (CV) mode ...................................................................................................... 31 4.3.4 Constant power (CW) mode ....................................................................................................... 32 4.3.5 Operations .................................................................................................................................. 33 4.4 Transient operation ............................................................................................................................ 34 4.4.1 Continuous .................................................................................................................................. 35

Copyright © Itech Electronic Co., Ltd. vii 4.4.2 Pulsed ......................................................................................................................................... 35 4.4.3 Toggled ....................................................................................................................................... 35 4.4.4 A/B transient operations .............................................................................................................. 36 4.5 List operation ..................................................................................................................................... 37 4.6 Triggered operation ........................................................................................................................... 40 4.6.1 Trigger function ........................................................................................................................... 40 4.6.2 Trigger source ............................................................................................................................. 40 4.7 Short operation .................................................................................................................................. 40 4.8 Input on/off operation ......................................................................................................................... 40 4.9 Synchronous load .............................................................................................................................. 41 4.10 Von operation .................................................................................................................................. 41 4.11 Protection functions ......................................................................................................................... 43 4.11.1 Over voltage protection (OVP) .................................................................................................. 43 4.11.2 Over current protection (OCP) .................................................................................................. 43 4.11.3 Over power protection (OPP) .................................................................................................... 43 4.11.4 Over temperature protection (OTP) .......................................................................................... 44 4.11.5 Reverse voltage protection (LRV/RRV) .................................................................................... 44 4.12 Save and recall operation ................................................................................................................ 44 4.13 Automatic test .................................................................................................................................. 44 4.14 CR-LED Test Function ..................................................................................................................... 48 Chapter5 Specifications ..................................................................................................................... 49 5.1 Main technical parameters ................................................................................................................ 49 5.2 Supplementary characteristics .......................................................................................................... 57 Chapter6 Remote operation ............................................................................................................... 59 6.1 RS232 interface ................................................................................................................................. 59 6.2 Ether Net interface ............................................................................................................................. 61 6.3 GPIB interface ................................................................................................................................... 61 6.4 USB interface .................................................................................................................................... 61 Appendix .................................................................................................................................................... 63 Specifications of Red and Black Test Lines ............................................................................................. 63

Copyright © Itech Electronic Co., Ltd. 1 Chapter1 Inspection and Installation This chapter mainly explains to the customer how to do the inspection after receiving the package, and introduces the installation size and steps for the mainframe and modules. 1.1 Verifying the Shipment Unpack the box and check the contents before operating the instrument. If wrong items have been delivered, if items are missing, or if there is a defect with the appearance of the items, contact the dealer from which you purchased the instrument immediately. The package contents include: Item Qty . Model Remarks Electronic Load x1 IT8700 series The IT8700 series include: IT8722/IT8723/IT8731/IT8732/IT8733 /IT8722B/IT8732B/IT8733B/IT8701 /IT8702/IT8703 Power cord x1 IT-E171/IT-E172/ IT-E173/IT-E174 User may select an appropriate power cord that matches the specifications of power socket used in the area. See the Section Connecting the Power Cord for details. CD x1 - It contains IT8700 electronic load User’s Manual, Programming Guide and other user documentations. USB x1 - - Ex-factory Test Report x1 - It is the test report of the instrument before delivery. NOTE Upon verification of the shipment, keep the package and relevant contents thereof in a safe place. When returning the instrument for warranty service or repair, the specified packing requirements shall be met. IT8700 series electronic Load have optional accessory which individual sales: IT-E153 Rack Mount Kit. 1.2 Module installation Two load modules (IT8731/ IT8732/ IT8722B/ IT8732B/ IT8733/ IT8733B/ IT8722/ IT8723) can be installed into IT8701 mainframe, and four load modules can be installed into IT8702 mainframe. If the modules installed all have double channels, the load will have eight channels at maximum. Load modules can be installed at any sequence into the mainframe. IT8703 extended frame can also contain four load modules. The installation steps of extended frame are the same as single mainframe, which just need screwdriver. Installation steps: 1. Turn off the power switch and disconnect the 110V/220V power cord. 2. Take off any packing materials around the mainframe. 3. Push the module into the slot(as shown in figure 1-1)

Copyright © Itech Electronic Co., Ltd. 2 4. Fix the module with a screwdriver, the position of the screw is in the upside and backside of the machine frame. 5. Install other modules one by one Figure 1-1 module installation NOTE Franklinism will damage the module. Please install the module according to standard electrostatic prevention operation style. Avoid touching the circuit board and connectors. 1.2.1 Channel number To IT8700, the channel number for all modules is determined by the location of the modules in relation to right side of the mainframe. To IT8702 mainframe, the total channel number is 8. The 1st & 2nd channel are always next to the right mainframe while 7, 8 channels are always next to the left side. Load channel number is fixed even if the location isn’t occupied. Load module could have one or two channels. The channel number of single channel model from right to left according to the slot position should be: 1th channel, 3th channel, 5th channel…. For module with dual channels, such as IT8722, the channel number should be: 1th and 2th channels, 3th and 4th channels, 5th and 6th channels… The figure below displays the rule of the module channel number. IT8701 mainframe and IT8703 extended mainframe can be understood in the same way. Fig 1-2 channel number distribution For example：If IT8702 mainframe contains two single channel modules IT8731 and two double channels modules IT8722, channel number is automatically Channel number sequentially are: 8,7,6,5,4,3,2,1 Module Mainframe

Copyright © Itech Electronic Co., Ltd. 3 assigned to every channel at the sequence from right to left: 1,3,5,6,7,8. Now channel number 2,4 aren’t occupied. IT8722 is double channels module. (If the installation location of two IT8722 modules is close to the left of the mainframe, the channel number is 5,6,7,8 in sequence.) Modules including single channel modules: IT8731,IT8732,IT8732B,IT8733,IT8733B and double channel modules: IT8722,IT8723,IT8722B can be installed into IT8701, IT8702 mainframe or IT8703 extended frame according to your need. 1.3 Mainframe installation The operating temperature of IT8700 series electronic load is 0 to 40℃. A fan cools the electronic load by drawing air through the top and sides and exhausting it out by the rear side. The electronic load must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation. Minimum clearances for bench operation are 3cm on the top. If there are radiator fan in your cabinet, please avoid installing the load near the fan for cabinet fan because it will limit air circulation of load. If you are installing equipment on top of your electronic load in the cabinet, use a filler panel above the unit to ensure adequate for air circulation. IT8702 and IT8703 can be mounted in a standard 19-inch rack panel cabinet. When it’s mounted, there’s no need to remove the bottom studs. You can achieve it using IT-E153B (optional). NOTE Do not block the fan exhaust at the rear of the Load. When the load uses on the desk, make sure there enough space on the bottom of the equipment for air circulation. 1.3.1 Installation Size Introduction The instrument should be installed at well-ventilated and rational-sized space. Please select appropriate space for installation based on the electronic load size. 单通道编号的例子 Channel 1 Channel 7 Channel 3 Channel 5 单通道编号的例子 Channel 1 Channel 7 Channel 3 Channel 5 Fig1-3 channel number order while installing 4single-channel unit

Copyright © Itech Electronic Co., Ltd. 4  the dimensions of IT8701 IT8701 Mainframe size Detailed Dimension Drawing IT8701 Installation figure

Copyright © Itech Electronic Co., Ltd. 5  the dimensions of IT8702/IT8703 Detailed Dimension Drawing IT8702 Mainframe size Detailed Dimension Drawing

Copyright © Itech Electronic Co., Ltd. 6  the dimensions of Module IT8722/IT8723/IT8731/IT8732//IT8722B IT8732B/IT8733B/IT8733 IT8702 Installation figure Detailed Dimension Drawing IT8703 Extended mainframe installation figure(dimension is the same as IT8702)

Copyright © Itech Electronic Co., Ltd. 7 1.4 Connecting the Power Cord Connect the power cord after checking that the power switch of the instrument is turned OFF. AC power input level IT8700 series electronic load support 110V/220V AC input. Please pay attention to the AC level setup before provide AC power. (The AC line switch is located at the rear of the unit.)  Option Opt.1: 220V ±10% 50Hz/60Hz  Option Opt.2: 110V ±10% 50Hz/60Hz Input voltage selection The load can work under 110/220V±10%AC input, as the label shown on the rear（refer to figure 1-4）. If the default value on the label doesn’t match your region’s, please switch the black key to choose input line voltage, and then insert power cord. Choose the right linear voltage as following. IT8700 Module Detailed Dimension Drawing

Copyright © Itech Electronic Co., Ltd. 8 NOTE There’s no need to change fuse when linear voltage changes. The fuse can protect the electronic load at any setting voltage specified. Figure 1-4 power switching keys Types of power cord Select from the following schedule of Power Cord Specifications an appropriate power cord that matches the voltage for the area in which you use the instrument. If the power cord included in the instrument you purchased does not match the voltage, contact the dealer or manufacturer for change. China IT-E171 United States & Canada IT-E172 Europe IT-E173 England IT-E174 Figure 1-5 types of power cord （L：Live or Active Conductor(also called “live” or “hot”; N：Neutral or identified conductor; E：Earth or Safety Ground） Connecting AC Input Connect standard power cord to the power supply input terminal. Figure 1-6 Connecting AC Input Connecting AC Input 电源转换开关 电源转换开关 放大图 电源转换开关 电源转换开关 放大图 110V 110V 110V 110V 110V 110V 110V 220V 220V 220V 220V 220V 220V 220V Power switch

9 Chapter2 Quick Start This chapter introduces the front panel and the rear panel of the electronic load, make sure that you can quickly know the appearance, instruction and the key function before you operate the load, Help you make better use of this series of electronic load. 2.1 Brief Introduction IT8700 series DC electronic loads are multi-channel programmable electronic loads which can provide multiple solutions according to the requirements of your design and test. This series have international advanced functions and features. IT8700 series DC electronic loads has four standard communication interfaces: RS232, USB, GPIB and Ether Net.  Removable modules for easy system configurability  Dynamic power distribution function for dual channels, save your cost  Dual-channel module displays every channel information simultaneously  Measure short-circuit peak current value  Up to 25KHZ transient mode and 100KHZ list mode  Measurement resolution: 0.1mV,0.01mA (10uA)  Measurement speed: up to 50KHZ  Auto-test function, with automatic judgment whether the test result exceeds the set specification  Adjustable up/down slope of current  Support several electronic loads working at the same time  Support up to 16 channels with mainframe extension  Output resolution up to 16 bits, voltmeter and ammeter reach 5 1/2 bits  CC/CV/CR/CW mode  Highlight VFD display for both mainframe and modules  Support SCPI communication protocol  Output terminals on the rear panel  Simulate the transient response and export measured values in time  Built-in waveform generator and LIST mode  Built-in Ether Net/GPIB/USB/RS232 interfaces Model Voltage Current Power IT8731 80V 40A 200W IT8732 80V 60A 400W IT8732B 500V 20A 300W IT8733 80V 120A 600W IT8733B 500V 30A 500W IT8722 80V 20A 250W 80V 20A 250W IT8723 80V 45A 300W 80V 45A 300W IT8722B 500V 15A 250W 500V 15A 250W

10 *IT8722, IT8723 and IT8722B are dual channel modules 2.2 Introduction This user’s manual introduces the specifications, installation, operation and programming of IT8700 series DC electronic loads. There’re two parts in IT8700 DC electronic loads, mainframe/ extended frame and modules. The frames mentioned are IT8701, IT8702 mainframe and IT8703 extended frame. The modules mentioned are divided into two kinds: single channel module (IT8731, IT8732, IT8732B, IT8733, IT8733B) and double channels module (IT8722, IT8723, IT8722B). Each module should be installed into frame to work. The range of every module’s specific voltage, current and power will be introduced in the Chapter 5: specifications in detail. There are up to 4 channels in IT8701 mainframe. After extended with IT8703 mainframe, it can be up to 12 channels. The dimension of IT8702 is the same with IT8703. The difference is that IT8702 is main control frame while IT8703 is an extended unit. There are up to 8 channels in IT8702 mainframe. After extended with IT8703 mainframe, it can be up to 16 channels. All panel operation and programming are also carried on the IT8701 or IT8702 main panel. One module could have one or two channels, each module will have its own channel number according to the slot position. In the case of IT8702 mainframe, there are 4 slot locations and each slot location has 2 channels, thus there are 8 channels in total and the channel number ranges from right to left in sequence. if each slot has one channel, then the channel number from right to left should be:1th channel,3th channel,5th channel….For module with dual channels, the channel number should be:1th and 2th channels,3th and 4th channels,5th and 6th channels….IT8703 extended mainframe can be understood in the same way. The technical parameters of each module such as voltage, current and power are different. (Refer to Chapter5 Specifications for more details). The menu functions of module IT8731, IT8732, IT8732B, IT8733, IT8733B, IT8722, IT8723 and IT8722B are similar. The main functions are described as follows: Module IT8731, IT8732, IT8732B, IT8733, IT8733B, IT8722, IT8723, IT8722B  Working functions: constant current(CC),constant resistance(CR),constant voltage(CV),constant power(CW)  Enable you to set the rising slope and falling slope of current in dynamic mode, dynamic functions has one mode: CC  Dynamic mode: up to 25KHZ,list mode: up to 100KHZ  Voltage measuring resolution:0.1mV, Current measuring resolution 0.01mA(10 uA), measuring speed could reach 50KHZ  With remote sense function  Short-circuit function  Storage capacity:101 sets, used to save customer’s setting parameters  List mode: enable you to edit a list file in CC mode. Number of list steps: 2-84, each step time: 0.000020~3600s.You can save seven list files.  Auto test function, up to 10 test files or 100 test items

11 2.3 Front Pannel Introduction There’re two parts in front panel, which are main panel and module panel. Refer to figure 2-1. Main panel and module panel keys’ function will be introduced below. Figure 2-1 IT8700 front panel (take example of IT8702) 1. VFD display 2. Module keyboard: ,,,, and direction keys. 3. Knob, change parameters 4. Mainframe function keyboard: control each channel’s operating status. Control input status: On/Off. Specific buttons: , , , , , , , , , , <▲>, <▼>. 5. Mainframe compound button(（numeric keys）:1.set parameters 2.assembled menu function. detailed buttons:<1>,<2>,<3>,<4> plus function keys to enter the system menu,<5> plus function keys to enter the config menu, <6> plus function keys to enter program menu,<7> plus function keys to select local operation,<8> plus function keys to select lock function, <9>, <0>,<.>, . 6. Power switch ON/OFF 2.4 Rear panel description The part introduces the location of terminals and interfaces on the rear panel. Refer to figure 2-2 for more details. Figure 2-2 IT8700 rear panel (take example of IT8702) ① ② ③ ④ ⑤ ⑥ Module Mainframe ⑪ ⑫ ① ③ ② ⑤ ④ ⑦ ⑥ ⑧ ⑨ ⑩ ⑬ ⑭