multicomp pro HDS-N Series Manual 

1.2 PACKAGE CONTENTS ·················································· 5 2. SAFETY INFORMATION ·················································· 6 2.1 Safety Symbols and Terms ·············································································· 6 2.1.1 Safety Symbols ····················································································· 6 2.1.2 Safety Terms ························································································· 6 2.2 General Safety Information ············································································ 6 3. GENERAL CHARACTERISTICS······································· 9 4. PERFORMING THE GENERAL INSPECTION ··················· 10 4.1 Performing the General Inspection ··································································10 4.1.1 Check whether there is any Damage on it Due to Transportation ····················10 4.1.2 Make a Check on Accessories ·································································10 4.1.3 Make a Check on the Complete Instrument ················································10 5. INPUT CONNECTIONS ·················································· 11 5.1 Input Connections ······················································································· 11 5.1.1 Input connections ···················································································· 11 5.1.2 The connection of 1 kHz/5 V Square-wave test signal ·········································12 5.2 Front Panel and Keys Overview ······································································12 6. USING THE OSCILLOSCOPE ········································ 15 6.1 About this Chapter ······················································································15 6.2 Powering Up the Oscilloscope ·········································································15 6.3 Oscilloscope Operation Window ······································································15 6.4 Menu Description ························································································17 6.5 Manually Setting the Vertical System, Horizontal System and Trigger Position ··········17 6.5.1 Setting the Vertical System ·········································································17 6.5.2 Setting the Horizontal System and Trigger Position ············································18 6.6 Recall factory settings ···················································································19 6.7 Input Connections ·······················································································20 6.8 Displaying an Unknown Signal with Auto Set ·····················································20 6.9 Automatic Zero-returning of Trigger Horizontal Position and Trigger Level Position ··21 6.10 Automatic Measurements ············································································21 6.11 Freezing the Screen ····················································································22 6.12 Using Average for Smoothing Waveforms ························································22

6.14 Using Peak Detection to Display Glitches ·························································24 6.15 Selecting AC-coupling ·················································································25 6.16 Reversing the Polarity of the Displayed Waveform ·············································26 6.17 Use USB mass storage device to save waveform data ··················································26 7. USING THE MULTIMETER ············································ 32 7.1 About this Chapter ······················································································32 7.2 Making Meter Connections ············································································32 7.3 Multimeter Operation Window ·······································································32 7.4 Making Multimeter Measurements ··································································33 7.4.1 Measuring Resistance Values ·································································33 7.4.2 Measuring Diode ··················································································34 7.4.3 On-off Test ··························································································35 7.4.4 Measuring Capacitance ·········································································35 7.4.5 Measuring DC Voltage ···········································································36 7.4.6 Measuring AC Voltage ···········································································37 7.4.7 Measuring DC Current ···········································································38 7.4.8 Measuring AC Current ···········································································39 7.5 Freezing the Readings ···················································································40 7.6 Taking a Relative Measurement ······································································41 7.7 Selecting Automatic/ManualRange Adjustment ··················································42 8. ADVANCED FUNCTION OF OSCILLOSCOPE ·················· 43 8.1 About this Chapter ······················································································43 8.2 Setting the Vertical Channel ···········································································43 8.2.1 Setting the Channel Coupling ··································································44 8.2.2 Open and Close Settings on Channel ·······················································45 8.2.3 Setting the probe attenuation ··································································45 8.2.4 Setting of Inverted Waveform ··································································46 8.3 Setting the Trigger System ·············································································46 8.4 Triggering Control ·······················································································46 8.4.1 Edge Trigger ························································································47 8.4.2 Video Trigger ·······················································································47 8.5 Setting the Acquiring Mode ············································································50 8.6 Display Setting ····························································································50 8.6.1 Display Style ························································································51 8.6.2 Persistence ·························································································51 8.6.3 Cymometer··························································································51 8.7 Waveform Saving Setups ···············································································52 8.7.1 Waveform Saving Setups in normal mode ·······················································52 8.7.2 Waveform Saving Setups in FFT mode ···························································53 8.8 Function Setting Menu ·················································································54

8.10 Setting the Cursor Measurements ··································································56 8.10.1 Setting the cursor measurement in normal mode ··············································56 8.10.2 Setting the cursor measurement in FFT mode ··················································59 8.11 Autoscale ·································································································60 8.12 Record ····································································································61 8.13 Using FFT ································································································64 8.14 System State Menu ·····················································································70 8.14.1 Real time clock ···················································································71 8.15 Setting of Time Base Mode ···········································································71 8.16 Data Transmission ······················································································73 9. TROUBLE SHOOTING ·················································· 75 10. APPENDIX ································································ 76 10.1 Appendix A: Specifications ···········································································76 10.1.1 Oscilloscope ······················································································76 10.1.2 Meter ································································································78 10.1.3 General Specifications ·········································································80 10.2 Appendix B: Maintenance and Cleaning ··························································81 10.2.1 Maintenance ······················································································81 10.2.2 Storage of Oscilloscope ········································································81 10.2.3 Replacing the Lithium Battery Unit ··························································82

See the picture below. This picture is only for your reference. If any discrepancy found between certain picture and product, please look the actual product. # Description Standard Optional 1 Oscilloscope and Battery ● 2 AC-DC adapter ● 3 Oscilloscope Probe × 1 (grey) ● 4 Multimeter test lead × 2 (black and red) ● 5 USB Mass Storage connect cable ● 6 Extension module for capacitance measurement ● 7 Probe adjustment tools ● 8 USB communication cable or RS-232C communication cable ● 9 User Manual ● 10 CD-ROM (software) ● 11 Metal carrying case ● 12 Soft carrying case ● 13 The output terminal of 1 kHz 5 V square-wave test signal ● Figure 1: Digital Oscilloscope Parts

In order to ensure the correct using and the best efficient service, please carefully read this user's manual. 2.1 Safety Symbols and Terms 2.1.1 Safety Symbols These symbols may appear in this manual or on the instrument. Warning: "Warning" identifies conditions and actions that pose hazards to the users. Caution: "Caution" identifies conditions and actions that may damage the product or other properties. 2.1.2 Safety Terms The following terms may appear on the instrument: Danger: The term "Danger" is used in this manual to indicate that when you read this mark, personal injury may be caused to you immediately. Warning: The term "Warning" is used in this manual to indicate that when you read this mark, personal injury may not be caused to you immediately, but you need to be cautionary. Notice: The term "Notice" is used in this manual to indicate that damages may be caused on this product or other properties. 2.2 General Safety Information Carefully read the following safety information in order to avoid any personal injury and damage on this product or any products connected with it. This product can only be used in the specified applications to prevent any possible dangers. DANGER: High Voltage Refer to the Manual Protective Conductor Terminal Chassis Ground Earth (ground) Terminal

adapter appointed by the manufacturer and subject to approval of being used in the user's country. Warning: The two channels of the oscilloscope are non-isolated electrically. The channels should adopt common basis during measuring. To prevent short circuits, the 2 probe ground must not be connected to 2 different non-isolated DC level. Warning: The channels should adopt common basis during measuring. To prevent short circuits, the 2 probe ground must not be connected to 2 different non-isolated DC level. The diagram of the oscilloscope ground wire connection: Ground Clip Signal Input Electrical Outlet Probe Oscilloscope AC Adapter The diagram of the ground wire connection when the battery-powered oscilloscope is connected to the AC-powered PC through the ports: Ground Clip Signal Input Oscilloscope (Battery-power) PC Electrical Outlet Probe USB/COM Cable It is not allowed to measure AC power when the oscilloscope is AC powered through the adapter, or when the battery-powered oscilloscope is connected to the AC-powered PC through the ports. Warning: To avoid fire or electrical shock if a test tool input is connected to more 42V peak (30Vrms) or on circuits of more than 4800VA: ● Use only insulated voltage probes, test leads and adapter supplied with the test tool, or indicated as suitable for the Oscilloscope & Multimeter. ● Before use, inspect voltage probes, test leads and accessories for mechanical damage and replace when damaged. ● Remove all probes, test leads and accessories that are not in use.

Oscilloscope & Multimeter. ● Do not apply voltages that differ more than 400 V from earth ground to any input when measuring in a CAT Ⅱ environment. ● Do not apply voltages that differ more than 400 V from each other to the isolated inputs when measuring in a CAT Ⅱ environment. ● Do not apply input voltages above the rating of the instrument Use caution when using 1:1 test leads because the probe tip voltage will be directly transmitted to the Oscilloscope & Multimeter. ● Do not use exposed metal BNC or banana plug connectors. ● Do not insert metal objects into connectors. ● Always use the Oscilloscope & Multimeter only in the manner specified. ● Voltage ratings that are mentioned in the warning are giver as limits for "working voltage". The represent V ac rms (50-60Hz) for AC sine wave applications and as V dc for DC applications. Overvoltage Category Ⅱ refers to local level , which is applicable for appliances and portable equipment . Only qualified technical personnel are permitted to perform maintenance. Pay attention to the nominal values of all terminals: To avoid fire or electric shock, please keep a watchful eye on all nominal values and marks specified for this product. Before any connection performed on this product, carefully read the user's manual of the product for further information of nominal values. No operation is allowed without the instrument cover plate: If the cover plate or panel has been removed, do not perform any operation on this product. No touch is allowed on bare conductors: When the product is powered on, do not touch any bare joints or parts of the scope meter. Operation is prohibited in case of any undetermined failure: When in doubt any damage on this product, consult the qualified personnel for checking on it. Keep ventilation in good condition: Refer to the user manual for detail installation instructions in order to fix this product correctly and provide it with good ventilation conditions. No operation is allowed under a humid environment. No operation is allowed under an explosive environment. Keep clean and dry on the product surface. Using the Oscilloscope & Multimeter in a manner not specified may impair the protection provided by the equipment.

Oscilloscope  2 in 1 (Multimeter function support);  Record length of 6,000 points for each channel;  Reading-out with the cursor;  Eighteen automatic measurement functions;  Autoscale function;  Colour liquid crystal display of high resolution and high contrast with adjustable back light;  Storage and call-out of waveforms;  Automatic setting function provided capable of fast setting;  FFT function  Implementation of detecting the average and peak values of the waveform;  Edge and video triggering function;  RS232 or USB communication ports;  Multiple Language User Interface. Multimeter  3 and 3/4 digits;  Volts, Amps, Ohms, Diode, Capacitance, Continuity measurement;  10A maximum amplitude;  Isolated inputs between oscilloscope and multimeter.

10 4. Performing the General Inspection 4.1 Performing the General Inspection When you have got a new oscilloscope, it is suggested that you should perform a general inspection on the instrument according to the following steps. 4.1.1 Check whether there is any Damage on it Due to Transportation If the packing boxes or foam cushions are found to have serious damage, keep them in a safe place until the complete instrument and accessories have passed the electrical and mechanical tests. 4.1.2 Check the Accessories Check that all the parts and accessories are included and in serviceable condition. 4.1.3 Check the Complete Instrument If the instrument is damaged in its appearance or it fails in normal operation or performance test, do not use it and contact the supplier directly.

5.1 Input Connections 5.1.1 Input connections See the following Figure 2: Figure 2：Input connections Description: 1. The power adapter is supplied for AC power supply and battery recharging. 2. Multimeter test lead. 3. Multimeter input jacks, including four circular banana jacks. The first jack measuring the current 2A-10A, the second jack on the current Measurement, the third COM ground input, and the fourth measuring voltage, resistance, Capacitance input. 4. Oscilloscope probe. 5. Oscilloscope channel input. 6. The output terminal of 1kHz/5V square-wave test signal.

At the left side of the oscilloscope, it is a port for testing 1 kHz/5 V square-wave signal which is used to adjust the probe, shown as Fig.3 Fig.3. The connection of Square-wave test signal 5.2 Front Panel and Keys Overview See the following Figure 4:

Description: 1. AC adapter Port 2. RS-232C Port. 3. USB Port. 4. USB Mass Storage Port. 5. Power switch. 6. F1 - F5: Switch or Adjust options for each menu.

trigger level according to the input signal. 8. COPY: Press to save the waveform data into the USB Mass Storage Device. 9. ▲ (red): Adjust vertical position in Channel. 10. VERTICAL ZERO (red): Adjust vertical position to zero. 11. ▼ (red): Adjust vertical position. 12. (red): Adjust voltage scale. 13. CHANNEL SETTING (red): Enter Channel settings directly. 14. (red): Adjust voltage scale. 15. RUN/STOP: key for running or stopping the operation 16. LIGHT: backlight control. 17. DMM/OSC: Operation mode switching key between oscilloscope and multimeter. 18. MENU ▲: Choose the upper item on the menu list. 19. MENU: Show / Hide the menu 20. MENU ▼: Choose the lower item on the menu list. 21. OPTION: the key for DSO setting and combines with four arrow keys. Then to set main time base, trigger horizontal position and trigger vertical position. Furthermore adjust cursor 1 (V1 or T1) and cursor 2 (V2 or T2) position during cursor measurement. 22. ▲ (OPTION): Oscilloscope display upward adjustment key. 23. ▼ (OPTION): Oscilloscope display downward adjustment key. 24. ► (OPTION): Oscilloscope right-direction adjustment key. 25. ◄ (OPTION): Oscilloscope left-direction adjustment key. 26. A: Selects DMM current measurement 27. V: Selects DMM voltage measurement 28. R: Selects DMM impedance, diode, continuity and capacitance measurement 29. SET: convert AC and DC during measure current or voltage in Multi-meter; convert resistance, diode, on-off and capacitance measure during resistance measuring.

15 6. Using the Oscilloscope 6.1 About this Chapter This chapter provides a step-by-step introduction to the scope functions. The introduction does not cover all of the capabilities of the scope functions but gives basic examples to show how to use the menus and perform basic operations. 6.2 Powering Up the Oscilloscope Connect oscilloscope to AC power via AC-DC adapter as shown in Figure 1. (The oscilloscope may still work with built-in Li-ion battery even without AC power supply). Turn the oscilloscope on by pressing down the power on/off key . The instrument then performs self checking after power on. A greeting window and a sentence "Press any key to continue." will display on the screen when the system finishes self checking. The users can press any key to enter the measuring function. The oscilloscope is powered up in its last setup configuration. 6.3 Oscilloscope Operation Window See the following figure 5: Figure 5: Oscilloscope Operation Window

16 Description: 1. Battery electric quantity indicating symbols. 2. Auto measurement window 1, in which "F "means frequency, "T" means cycle, "V" means the average value, "Vp" the peak-peak value ,"Vr" the root-mean-square value,. "Ma" the maximum amplitude value, "Mi" the minimum amplitude value, "Vt" the Voltage value of the waveform's flat top value, "Vb" the Voltage value of the waveform's flat base, "Va" the amplitude value, "Os" the overshoot value, "Ps" the Preshoot value, "RT" the rise time value, "FT" the fall time value, "PW" the +width value, "NW" the -Width value, "+D" the +Duty value, "-D" the -Duty value. 3. Auto measurement window 2. 4. The pointer indicates the horizontal triggering position. 5. This reading gives the Time Difference between the horizontal triggering position and the screen centerline. It reads zero when the pointer is in the center of the screen. 6. The trigger state indicates the following information. Auto: The oscilloscope is working in the automatic mode and displaying the waveform under the non-trigger state. Trig'd: The oscilloscope has detected a trigger and collecting the information generated after the trigger. Ready: All pre-triggered data have been captured and the oscilloscope has been ready to receive trigger signals. Scan: The oscilloscope can gather and display the waveform data continuously in scanning mode. Stop: The oscilloscope has stopped collecting the waveform data. 7. Green pointer indicates vertical trigger position when edge trigger, and no green pointer when video trigger. 8. A hidden-style menu: With the MENU key pressed, you can view or hide the menu. 9. Menu setting options: There are different setting options for different menus. 10. It reads the value of trigger voltage level. 11. The reading gives the value of primary time base. These graphics present the coupling modes of channel . The graphic "～" indicates AC, the graphic "－" indicates DC, the graphic " " indicates GND. 12. This reading shows the vertical Voltage Unit Scale of channel. 13. The red pointer gives the grounding datum point of the waveform on channel, which is the zero position of channel. No pointer display indicates the channel has not been opened.

17 14. OPTION operation prompt: There are different prompts for different OPTION operations. 15. Waveform display area, and the wave shows red. 6.4 Menu Description The following example shows how to use the tool's menus to select a function, as shown in the following figure. 1. Press the MENU key to display the Function Menu on the right of the screen and the corresponding optional settings on the bottom. Press MENU again will hide the Function Menu. 2. Press the MENU ▲ or MENU ▼ key to select different function menus. 3. Choose one key from F1 to F5 and press it to change function setting. See the following figure 6: Figure 6: the Tool's Menus 6.5 Manually Setting the Vertical System, Horizontal System and Trigger Position 6.5.1 Setting the Vertical System To set the vertical position of channel: (1) The key ▲ (red) and ▼ (red) can be used to adjust the vertical position of channel; the relevant information will be displayed at the left bottom of the screen. (2) The key (red) and (red) can be used to adjust the voltage scale of channel; the relevant information will be displayed at the left bottom of the screen. Note: Press VERTICAL ZERO (red) key to set the vertical position of channel to zero.

18 6.5.2 Setting the Horizontal System and Trigger Position OPTION key is a multiple setting key to set trigger vertical position, main time base and horizontal position (trigger horizontal position) during edge trigger and video trigger. The following example shows how to use OPTION key to make a setting. The following guidance is for the operation on the mode of edge triggering and video triggering. 1. Press once the OPTION key; the following is displayed at the bottom left side of the screen, as shown in the figure below. ◄/► – Time Base ▲/▼ – Trig See the following figure 7: Figure 7 2. Press ◄ (OPTION) or ► (OPTION) to adjust the main time base; press ▲ (OPTION) or▼ (OPTION) to adjust trigger level position, press R key to "zero" the trigger level position. 3. Press OPTION again and left bottom side display as ◄/► – Time ▲/▼ – Trig See the following figure 8:

19 Figure 8 4. Press ◄( OPTION) or ►( OPTION) to adjust time base horizontal position, press V key to "zero" the horizontal position; press ▲(OPTION) or ▼(OPTION) to adjust trigger level position, press R key to "zero" the trigger level position. 5. Press OPTION again to back up operation 1. Term interpretation  Vertical scale factor: It stands for the voltage amplitude represented by a division in the vertical direction of the display area, through the adjustment of which you can amplify or attenuate the signal and thus regulate the signal amplitude into the expected measurement range.  Vertical zero position: It is referred to as the grounding datum point, through the adjustment of which you can regulate the display position of the waveform on the screen.  Main time base: It means the time values represented by a division in the horizontal direction of the display area.  Trigger horizontal position: It means the time deviation between the actual trigger point and the screen central line, which will be displayed as 0 at the center point of the screen.  Trigger level position: It represents the voltage deviation between the actual trigger level and the zero position of the triggering signal source channel. 6.6 Recall factory settings If you want to reset the Oscilloscope to the factory settings, do the following: 1. Press MENU key and the function menu appears on the right side of the screen 2. Press the MENU ▲ or MENU ▼ key to select FUNCTION setting and three options are visible at the bottom of the screen.

20 3. Press F1 key to select "Recall Factory" to recall the factory settings. 4. Press F2 key to select "Auto calibration". If the ambient temperature variation is up to or larger than 5 Celsius degree, the Auto calibration function should be performed. But this will not affect the using and capability by the heat from LCD and electronic component See the following Figure 9: Figure 9: Reset the Oscilloscope 6.7 Input Connections See Figure 2 on P11. Look at the bottom and the right of the Oscilloscope. The Oscilloscope has six signal inputs: one safety BNC jack inputs (CH) for scope measurements, four safety 4-mm banana jack inputs for Multimeter R, V and A measurements. Isolated input allows independent floating measurements between Multimeters and Scopes. 6.8 Displaying an Unknown Signal with Auto Set The Auto-Set feature lets the Oscilloscope display and measure unknown signals automatically. This function optimizes the position, range, time base and triggering, assures a stable display of virtually any waveform. This feature is especially useful for quickly checking several signals. To enable the Auto-Set feature, do the following: 1. Connect the test probe to the tested signals. 2. Press the AUTO SET key and the Oscilloscope is under the automatic measurement condition. The tested signals appear on the screen.

21 6.9 Automatic Zero-returning of Trigger Horizontal Position and Trigger Level Position When we adjust the trigger horizontal position and trigger level position to be maximal to make it off the screen center remotely, then we perform the following steps to make trigger horizontal position and trigger level position return to zero automatically. 1. Press V key, the trigger horizontal position automatically returns to zero. 2. Press R key, the trigger level position automatically returns to zero. 6.10 Automatic Measurements The Oscilloscope offers 18 ranges of automatic scope measurements. Your can display two numeric readings: measurement 1 and measurement 2. These readings are selectable independently, and the measurements can be done on the input waveform. To choose a frequency measurement, do the following: 1. Press MENU key and the function menu appears on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select MEAS SET1. Four items selectable are visible at the bottom of the screen. 3. Press F1 key to select Freq measurement. The measurement 1 window shows the frequency for input waveform. To choose a Peak-Peak measurement, do the following: 1. Press MENU key and the function menu are displayed on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key and select MEAS SET2, with 4 items selectable displayed at the bottom of the screen. 3. Press F4 key to select PK-PK measurement. The measurement 2 window shows the peak-peak value for input waveform. See the following figure 10:

22 Figure 10: Automatic Scope Measurements 6.11 Freezing the Screen You can freeze the screen (all readings and waveforms) 1. Press the RUN/STOP key to freeze the screen and STOP appears at top right side of the screen. 2. Press the RUN/STOP key once more to resume your measurement. See the following figure 11: Figure 11: Freezing the Screen 6.12 Using Average for Smoothing Waveforms Using the Average acquisition mode, you can smooth out the displayed waveform by averaging multiple data samples. The number of averaging is selectable from 4, 16, 64, and 128. Note: In order for average mode to work in the best way, the waveform must be repetitive; As the

23 number of averaging increases, the slower the waveform update becomes. 1. Press the MENU key and the function menu appears on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select ACQU MODE, with four items selectable displayed at the bottom of the screen. 3. Press the F3 key to select Average, then, press F4 key to jump to Averages 64 item. This averages the outcomes of 64 acquisitions and shows the final averaging result on the screen, shown as the following figures. See the following figure 12: Figure 12: Average Factor Sampling Mode 6.13 Using Persistence to Display Waveforms You can use Persistence to observe dynamic signals. 1. Press MENU key and the function menu appears on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select DISP SET. 3. Press F2 key to select Persist 1 sec, 2 sec, 5 sec, Infinite or OFF. In this case, jump to Infinite and the observed dynamic is kept on the screen continuously. When the item OFF is selected, the Persistence function is closed. Look at the display, a screen like the following figure 13 can be shown.

24 Figure 13: Persistence to Observe Dynamic Signals 6.14 Using Peak Detection to Display Glitches You can use this function to display events (glitches or other asynchronous waveforms) of 50 ns or wider. 1. Press MENU key and the function menu appear at the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select the ACQU MODE. Four items selectable are displayed at the bottom of the screen. 3. Press F2 key and jump to Peak Detect. In this case, you can test the glitch. Now, you can see a screen that looks like the following figure 14. Figure 14: Peak Detection Term interpretation

25 Collecting mode: The oscilloscope transforms the collected analog data into a digital form after they are gathered in the following three different modes, that is, sampling, peak value detection and averaging values. Sampling: The oscilloscope takes samples from the signal at a equal time interval to reconstruct the waveform in this mode, by which the analog signal can be expressed correctly in most cases, yet, the rapid changes can not be collected between two sampling time intervals, causing the confusion and loss the narrow pulse in the signal probably. Peak value detection: The oscilloscope takes samples from the maximum and minimum of signals in each sampling interval and shows the waveform with the sampled data in this mode, thus, by which the oscilloscope may collect the possibly lost narrow pulse in the sampling mode but the noise is obvious. Averaging values: the oscilloscope collects several waveforms and average over them, and displays the averaged waveform in this mode, by which the random noise can be reduced. Duration time: When a new waveform is displayed, the previous waveform shown on the screen does not disappear immediately only to be displayed for a period of time, that is, the duration time, by setting which, the waveform can be displayed more continuously and thus a display similar to that shown by the analog oscilloscope can be achieved. Roll scan mode: The oscilloscope updates the waveform sampling points by scrolling display through a screen from left to right in this mode, which is only applicable to the primary time base setting of above 50ms. 6.15 Selecting AC-coupling After a reset, the Oscilloscope is dc-coupled so that ac and dc voltages appear on the screen, Use ac-coupling when you wish to observe a small ac signal that rides on a dc signal. To select ac-coupling, do the following: 1. Press MENU key and the function menu appear at the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select CH SETUP. Four items selectable are visible at the bottom of the screen. 3. Press the F1 key and jump to AC. The bottom left side of the screen displays the ac-coupling icon. Now, you can see a screen that looks like the following figure 15.

26 Figure 15: AC-Coupling 6.16 Reversing the Polarity of the Displayed Waveform To invert the input waveform, do the following: 1. Press the MENU key and the function menu appears at the right side of the screen. 2. Press the MENU ▲ or MENU ▼ key to select CH SETUP. Four items selectable are displayed at the bottom of the screen. 3. Press F4 key to jump to Inverted, set it as ON. The inverted waveform is displayed on the screen. Now, you can see a screen that looks like the following figure 16. Figure 16: Inverted On 6.17 Use USB mass storage device to save waveform data Insert the USB mass storage device into the USB port and press copy key, then the current

27 waveform data will be saved into the USB mass. The save waveform has two format, one is vector format and the other is bitmap format, according to the display settings from the choice of the communication settings. Name the file with current date and suffix by .bin or .bmp. Then connect the USB mass storage device with the computer after data is saved, and open the data of vector format with the analysis software, or direct open the bitmap. Note: It has clew in a series of process USB operation storage, such as "USB save successfully". USB disk Requirements The supported format of the USB disk: FAT32 file system, the allocation unit size cannot exceed 4K, mass storage USB disk is also supported. If the USB disk doesn't work properly, format it into the supported format and try again. Follow any of the following two methods to format the USB disk: using system-provided function and using the formatting tools. (The USB disk of 8 G or 8 G above can only be formatted using the second method – using the formatting tools.) Use system-provided function to format the USB disk 1. Connect the USB disk to the computer. 2. Right click Computer- Manage to enter Computer Management interface. 3. Click Disk Management menu, and information about the USB disk will display on the right side with red mark 1 and 2. Disk Management of computer

28 4. Right click 1 or 2 red mark area, choose Format. And system will pop up a warning message, click Yes. Format the USB disk warning 5. Set File System as FAT32, Allocation unit size 4096. Check "Perform a quick format" to execute a quick format. Click OK, and then click Yes on the warning message. Formatting the USB disk setting 6. Formatting process.

29 Formatting the USB disk 7. Check whether the USB disk is FAT32 with allocation unit size 4096 after formatting. Use Minitool Partition Wizard to format Download URL: http://www.partitionwizard.com/free-partition-manager.html Tip: There are many tools for the USB disk formatting on the market, just take Minitool Partition Wizard for example here. 1. Connect the USB disk to the computer. 2. Open the software Minitool Partition Wizard. 3. Click Reload Disk on the pull-down menu at the top left or press keyboard F5, and information about the USB disk will display on the right side with red mark 1 and 2.

30 Reload Disk 4. Right click 1 or 2 red mark area, choose Format. Choose format 5. Set File System FAT32, Cluster size 4096. Click OK. Format setting 6. Click Apply at the top left of the menu. Then click Yes on the pop-up warning to begin formatting.

31 Apply setting 7. Formatting process Format process 8. Format the USB disk successfully Format successfully

32 7. Using the Multimeter 7.1 About this Chapter This chapter provides a step-by-step introduction to the multi-meter functions of the test tool hereafter. The introduction gives basic examples to show how to use the menus and perform basic operations. 7.2 Making Meter Connections Use the four 4-mm safety banana jack inputs for the Meter functions: 10A, mA, COM, V/Ω/C. See figure 2 on P11 for the connections. 7.3 Multimeter Operation Window Figure 17: Multimeter Operation Window Description 1. Battery electric quantity indicator. 2. Manual/Auto range indicators, among which the MANUAL means measuring range in manual operation mode and AUTO refers to the measuring range in automatic operation mode.

33 3. Measurement mode indicators: DCV: Direct voltage measurement ACV: Alternating voltage measurement DCA: Direct current measurement ACA: Alternating current measurement R: Resistance measurement : Diode measurement : On/Off measurement C: Capacitance measurement 4. The relative magnitude measurement indicator. 5. Running state indicators, among which RUN expresses continuous update and STOP represents the screen locking. 6. The reference value of the relative magnitude measurement. 7. The multiplying power of the dial indication. To multiply the reading of dial pointer by multiplying power will get the measurement result. 8. The main reading of measurement 9. Automatic control measuring range. 10. Absolute/ relative magnitude measuring control: The sign "||" expresses the absolute magnitude measuring control and "△" represents the relative magnitude measuring control. Manually measuring range control. 11. Manual measurement control. 12. Test lead indicated the scale of test reading; different test modes display different colours. 7.4 Making Multimeter Measurements Press DMM/OSC key, the oscilloscope will switch to the multimeter measure; the screen will display the multimeter windows. 7.4.1 Measuring Resistance Values To measure a resistance, do the following: 1. Press the R key and R appears at the top of the screen.

34 2. Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. 3. Connect the red and black test leads to the resistor. The resistor value readings are shown on the screen in Ohm. Now, you can see a screen that looks like the following figure 18. Figure 18: Resistance Measurement 7.4.2 Measuring Diode To make a measurement on the diode, do the following: 1. Press the R key and R appears at the top of the screen. 2. Press SET key until the following is displayed on the screen . 3. Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. 4. Connect the red and black leads to the resistor and the diode resistor readings are displayed on the screen in V. Now, you can see a screen that looks like the following figure 19.

35 Figure 19: Diode Measurement 7.4.3 On-off Test To perform an On-off test, do the following: 1. Press the R key and R appears on the top of the screen. 2. Press the SET key until the following is shown on the screen. 3. Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. 4. Connect the red and black leads to the test point. If the resistance value of the tested point is less than 50Ω, you will hear beep sound from the test tool. Now, you can see a screen that looks like the following figure 20. Figure 20: On-off Test 7.4.4 Measuring Capacitance To measure a capacitance, do the following:

36 1. Press the R key and R appears on the top of the screen 2. Press the SET key until C appears at the top of the screen. 3. Insert the capacitance measurer of this multimeter to COM jack and V/Ω/C jack. 4. Insert the capacitance to the capacitance measurer, then screen shows the capacitance reading. Notice: when measured value is less than 5 nF capacitance, please use relative value measuring mode to improve measuring precision. It will take about 30seconds if capacitance measurement is larger than 40uF. Now, you can see a screen that looks like the following figure 21. Figure 21: Capacitance Measurement 7.4.5 Measuring DC Voltage To measure a DC voltage, do the following: 1. Press the V key and DCV appears at the top of the screen. 2. Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. 3. Connect the red and black leads to the measured point and the measured point voltage value is displayed on the screen. Now, you can see a screen that looks like the following figure 22.

37 Figure 22: DC Voltage Measurement 7.4.6 Measuring AC Voltage To measure the AC voltage, do the following: 1. Press the V key and DCV appears at the top of the screen. 2. Press the SET key and ACV appears at the top of the screen. 3. Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. 4. Connect the red and black leads to the measured points and the AC voltage values of measured points will be displayed on the screen. Look at the display; you can see a screen that looks like the following figure 23. Figure 23: AC Voltage Measurement

38 7.4.7 Measuring DC Current To measure a DC current which is less than 400 mA, do the following: 1. Press the A key and DCA appears at the top of the screen. The unit on the main reading screen is mA. mA and 10A will display on the right bottom of screen, press F4 and F5 to switch the measurement between mA and 10A. 400mA is acquiescently. 2. Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input. 3. Connect the red and black leads to the measured points and the DC current values of measured points will be displayed on the screen. Look at the display; you can see a screen that looks like the following figure 24. Figure 24: DC Current Measurement for 400 mA To measure a DC current which is larger than 400 mA, do the following: 1. Press the A key and DCA appears at the top of the screen. The unit on the main reading screen is mA. 2. Press F5 key change to 10A measurement, the unit on the main reading screen is A. 3. Insert the black lead into the COM banana jack input and the red lead into the 10A banana jack input. 4. Connect the red and black leads to the measured point and the DC current value of the measured point will be displayed on the screen. 5. Press F4 return to 400 mA measure. Look at the display; you can see a screen that looks like the following figure 25.

39 Figure 25: DC Current Measurement for 10A 7.4.8 Measuring AC Current To measure an AC current which is less than 400 mA, do the following: 1. Press the A key and DCA appears at the top of the screen. The unit on the main reading screen is mA. mA and 10A will display on the right bottom of screen, press F4 and F5 to switch the measurement between mA and 10A. 400mA is acquiescently. 2. Press the SET key once and ACA is visible at the top of the screen. 3. Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input. 4. Connect the red and black leads to the measured point and the AC current value of the measured point will be displayed on the screen. Look at the display; you can see a screen that looks like the following figure 26. Figure 26: AC Current Measurement for 400 mA

40 To measure an AC current which is larger than 400 mA, do the following: 1. Press the A key, an instruction prompt you to plug the multimeter test leads in the right position. After check, press any key to enter into multimeter measure and DCA appears at the top of the screen. The unit on the main reading screen is mA. 2. Press the SET key once and ACA is visible at the top of the screen. 3. Press F5 to select 10A measure, the unit of main reading window is A. 4. Insert the black lead into the COM banana jack input and the red lead into the 10A banana jack input. 5. Connect the red and black leads to the measured point and the AC current value of the measured point will be displayed on the screen. 6. Press F4 return to 400mA measure. Look at the display, you can see a screen that looks like the following figure 27. Figure 27: AC Current Measurement for 10A 7.5 Freezing the Readings You can freeze the displayed readings at any time. 1. Press the RUN /STOP key to freeze the screen and STOP will be displayed at the top right of the screen. 2. Again, press the RUN /STOP key, you can resume your measurement. Look at the display; you can see a screen that looks like the following figure 28.

41 Figure 28: Freezing the Readings 7.6 Taking a Relative Measurement A currently measured result relative to the defined reference value is displayed in a relative measurement. The following example shows how to take a relative measurement. At first, it is required to acquire a reference value. 1. Press R key and R is displayed on the top side of the screen. 2. Press the SET key until C appears at the top of the screen. 3. Plug capacitance extended module in capacitance measure jack. 4. When the reading leveling off, press F2 key and △ is displayed on the top side of the screen. The saved reference value is displayed below △. 5. Plug capacitance, the displayed major reading on the screen is actual the capacitance value. Look at the display; you can see a screen that looks like the following figure 29.

42 Figure 29: Relative Measurement 7.7 Selecting Automatic/ManualRange Adjustment The defaulted range mode of the instrument is automatic range. To switch to the manual range, perform the following steps: 1. Press F1 key and MANUAL is displayed on the top left side of the screen to enter the manual range mode. 2. Under the manual range mode, the measuring range is increased by a stage when pressing F1 key each time, and when reaching the highest stage, it jumps to the lowest stage by pressing F1 key once again. To multiply the reading of dial pointer by multiplying power and the unit of main reading on the screen will get the measurement result. 3. Press F3 key and AUTO is displayed on the top left side of the screen to switch back to the automatic range mode. Look at the display; you can see a screen that looks like the following figure 30. Figure 30: Automatic/Manual Range Adjustment Attention: capacitance measurement without manual range mode.

43 8. Advanced Oscilloscope Function 8.1 About this Chapter This chapter will detail the oscilloscope function of the test tool. 8.2 Setting the Vertical Channel Each channel has its own independent vertical menu and each item can be set respectively based on the specific channel. To make vertical Channel settings, do the following: 1. Press the MENU key and the function menu appears at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to jump to CH SETUP and 4 options appears at the bottom of the screen. 3. Select key from F1 to F4 to make different settings. Now, you can find a screen that looks like the following figure 31. Figure 31: Setting the Vertical

44 The following Table describes the Vertical Channel menu: Function menu Setting Description Coupling AC DC Ground The dc component in the input signal is blocked. The ac and dc components of the input signal are allowed. Input signal is interrupted. Channel OFF ON Close the channel. Open the channel. Probe 1 X 10 X 100 X 1000 X Select one according to the probe attenuation level to ensure a correct vertical scale reading. Inverted OFF ON Waveform is displayed normally. Open the Invert function of the waveform setting. 8.2.1 Setting the Channel Coupling Press F1 key, set Coupling as AC to make an AC coupling setting. The DC component contained in the tested signal is blocked. Press F1 key, set Coupling as DC to make a DC coupling setting. Both DC and AC components contained in the tested signal are permitted. Press F1 key, set Coupling as Ground to make a Ground coupling setting. Input signal is interrupted. The waveform is displayed as the following figure 32, figure 33, and figure 34. Figure 32: AC Coupling

45 Figure 33: DC Coupling Figure 34: Ground Coupling 8.2.2 Open and Close Settings on Channel Press F2 Channel key first, and then OFF to make a Close setting on channle. Press F2 Channel key first, and then ON to make an Open setting on channle. 8.2.3 Setting the probe attenuation To prevent excessive input voltage, we recommend you to set the probe attenuation level to the 10X position to prevent excessive voltage. After attenuating the probe level by 10:1, you also need to magnify the display level by 10 X to match the displayed amplitude with the real amplitude. Press F3 Probe to adjust the probe attenuation level.

46 Table: Probe attenuation level and the corresponding menu setting Probe attenuation level Corresponding Menu Setting 1:1 1 X 10:1 10 X 100:1 100 X 1000:1 1000 X 8.2.4 Setting of Inverted Waveform Inverted waveform: The displayed signal reverses 180 degrees relatively to the ground potential. Press F4 to set Inverted as ON to start Invert; as OFF to close Invert. 8.3 Setting the Trigger System The Trigger defines the time when the acquisition of data and display of waveform. If it is set correctly, the trigger can turn an unstable display into a significant waveform. When starting the acquisition of data, the oscilloscope collects sufficient data to draw the waveform at the left side of the triggering point. With waiting for the triggering condition, the oscilloscope is gathering data continuously. After a trigger is detected, the oscilloscope gathers enough data continuously to draw the waveform at the right side of the triggering point. To make a trigger mode setting, do the following: 1. Press the MENU key and the function menu appears at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select TRIG MODE and five options are displayed at the bottom of the screen. 3. Select from F1 to F5 key to make a different setting. 4. Press OPTION and left bottom display as below during edge trigger and video trigger: — Time — Time Base — Trig — Trig 5. Press ▲ (OPTION) or ▼ (OPTION) to adjust trigger vertical position, Press ◄ (OPTION) or ► (OPTION) to adjust time base horizontal position or adjust horizontal position. 8.4 Triggering Control There are three trigger modes including Edge trigger and Video trigger . Each trigger mode is set by different function menu. Edge trigger: The edge trigger type triggers on the incoming signal edge. Use the edge trigger for all signals except for video related ones.

47 Video trigger: Perform video field trigger or line trigger on the standard video signals. The following describes Edge trigger and Video trigger menus respectively. 8.4.1 Edge Trigger The Edge trigger is a mode by which trigger occurs at the triggering threshold value of the input signal edge. With the Edge trigger selected, the trigger happens on the rise or fall edge of the input signal, shown as the figure 35. Figure 35: Edge Trigger The Edge trigger menu is described in the following table. Function menu Settings Description Slope Rising Falling Triggering on the rise edge of the signal. Triggering on the fall edge of the signal. Trig mode Auto Normal Single Acquisition of waveforms is possible even if there is no triggering condition detected. Acquisition of waveforms can only be done when the triggering condition is satisfied. Sampling on a waveform when one trigger is detected, and then stop sampling. Coupling AC DC With this mode selected, the DC component is prevented from passing-though. All components are allowed. Holdoff To go to holdoff menu 8.4.2 Video Trigger The video trigger type is designed to capture the video signal format, NTSC, PAL or SECAM. For any other signal type, use the edge trigger. Figure 36 is the Video Odd Field Trigger. Figure 37 and figure 38 is the Video Line trigger.

48 Figure 36: Video Odd Field Trigger Figure 37: Video Designed Line trigger (Page1) Figure 38: Video Designed Line trigger (Page2) The Video trigger menu is described in the following table (First page): Function menu Settings Description Sync Line Field Odd Field Even Field Line NUM Make a video line trigger synchronization setting. Make a video field trigger synchronization setting. Make a video odd field trigger synchronization setting. Make a video even field trigger synchronization setting. Make a video designed line synchronization setting. MODU NTSC PAL/SECAM Video format setting Holdoff To go to holdoff menu －－＞ 1/2 Back to previous menu（When Sync selected as Line NUM）

49 2. when the sync is Line NUM, the second page menu is shown as bellow. Line Increase Decrease Set the line value to increase Set the line value to decrease Line No. Set and Show the line valve －－＞ 2/2 Back to previous menu When you go to the holdoff menu, you can see a screen in the following figure 39. Figure 39: Trigger Holdoff the Holdoff menu is described in the following table: Function menu Settings Description Off Time Set time slot before another trigger event. Time Increase Decrease Set the off time to increase. Set the off time to decrease. Reset Off Time Reset Holdoff time to100ns. Back Back to previous menu. Note: Trigger Holdoff can stabilize complex waveform, such as the pulse range. Holdoff time is the oscilloscope's waiting period before starting a new trigger. During Holdoff, oscilloscope will not trigger until Holdoff ends. Term interpretation Holdoff: Set time slot before another trigger event. Trigger modes: There are three kinds of trigger modes available for this oscilloscope, they are, Auto (acquires signal continuously), Normal (acquires signal when trigger conditions are met) and Single (manually triggers the signal). Automatic trigger mode: The oscilloscope can acquire the waveform without any triggering condition detected in this mode, in which it will be triggered compulsively when waiting for a

50 specified period of time without any triggering condition ignited. When an invalid trigger is enforced，the oscilloscope can not keep the waveform in phase. Normal trigger mode: In this mode, the oscilloscope cannot acquire the waveform until it is triggered. When there is not any trigger, the oscilloscope will display the original waveform without new waveforms captured. Single mode: In this mode, the oscilloscope will detect a trigger and capture a waveform at each time when the customer presses the RUN/STOP key. 8.5 Setting the Acquiring Mode The ACQU MODE menu is described in the list shown as below. Function menu Settings Description Sample The waveform data is sampled at an equal time interval. The sample mode accurately reconstructs the waveform, but cannot respond to rapid changes and sudden peaks. Peak Detect The maximum and minimum data in the sampling interval are picked up. The peak detect mode captures rapid changes and sudden peaks, but the waveform becomes noisy. Average Multiple samples are averaged together. The average mode reduces the noise level, but the waveform must be repetitive. Averages 4, 16, 64 or 128 Select the average number. 8.6 Display Setting The DISP SET menu is described in the following table. Function menu Settings Description Type Vectors Dots The vector drawing mode shows the waveform as a smooth line, connecting each data point. The dot drawing mode shows the waveform as a collection of independent data points. Persist OFF 1sec 2sec 5sec Infinite The persistence setting sets how long the old waveforms remain in the display, useful for observing the waveform variations. Carry Bitmap Vectors The data transmitted in communication are bitmaps. The data transmitted in communication are vectors. Cymometer ON OFF to set up cymometer limit to "ON" status. to set up cymometer limit to "OFF" status.

51 8.6.1 Display Style The display style includes Vectors and Dots displays, shown as the following figure 40, figure 41. Figure 40: Dots Style Figure 41: Vectors Style 8.6.2 Persistence With Persist function selected, the displayed saved original data gradually decay in colour and the new data are bright in colour; with infinite persistence mode selected, the oscilloscope keeps all past traces of the displayed waveform. 8.6.3 Cymometer It is a 6 digits cymometer. Its measurement range of frequency is 2Hz to full bandwidth. Set up cymometer limit to "ON" status. To make a cymometer setting, do the following:

52 If you want to measure frequency of the Channel, you can do as the follows: 1. Press MENU, the function menu will appear on the right of the screen. 2. Press MENU ▲ or MENU ▼ and choose DISP SET, five options will show at the bottom of the screen. 3. Press F4 and choose ON. See the following figure 42: Figure 42 Cymometer 8.7 Waveform Saving Setups The oscilloscope can save 4 waveforms, which can be displayed on the screen with the present waveform. The recalled waveform saved in the memory cannot be adjusted. 8.7.1 Waveform Saving Setups in normal mode The WAVE SAVE menu is described in the following list. Function menu Setups Description WAVE A, B, C and D Select the address for saving or recalling a waveform. Save Store the waveform of a selected signal source into the selected address. Show ON OFF Close or start displaying the waveforms stored in address A, B, C or D. To save a waveform in address A, do the following: 1. Press the MENU key and the function menu appears at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select the WAVE SAVE. Three options are displayed at the bottom of the screen.

53 3. Press the F1 key to select the address A. 4. Press the F2 key to save the waveform in address A. To display the saved waveform on the screen, do the following: 6. Press the F3 key to select ON for the address A. The waveform saved in address A will be displayed on the screen in green colour. The display colour is green, and the zero point of waveform, voltage and time is purple Now, you can see a screen that looks like the following figure 43. Figure 43: Waveform Saving 8.7.2 Waveform Saving Setups in FFT mode FFT being on, the WAVE SAVE is described in the following list. Function menu Setups Description WAVE A, B, C and D Select the address for saving or recalling a waveform. Save Store the waveform of a selected signal source into the selected address. Show ON OFF Close or start displaying the waveforms stored in address A, B, C or D. To save a waveform in address A, do the following: 1. Press the MENU key and the function menu appears at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select the WAVE SAVE. Three options are displayed at the bottom of the screen. 3. Press the F1 key to select the address A. 4. Press the F2 key to save the waveform in address A

54 To display the saved waveform on the screen, do the following: 5. Press the F3 key to select ON for the address A. The waveform saved in address A will be displayed on the screen in green colour and the zero point of waveform, Vamp and Freq is purple. Now, you can see a screen that looks like the following figure44 Figure 44: Waveform Saving in FFT Mode 8.8 Function Setting Menu The FUNCTION menu is described in the following list. Function menu Setting Description Recall Factory Resume the instrument to its factory settings. Auto calibration Perform the Auto-calibration procedure. Language Chinese English Other Select the display language. Auto-calibration The Auto-calibration function automatically configures internal parameters to maintain the accuracy. Run the Auto-calibration in the following cases: The temperature fluctuates more than 5 degrees Celsius during operations. Operate the oscilloscope in a new bench top or field environment. Procedure: 1. Press the MENU key and select the FUNCTION menu using MENU ▲ or MENU ▼ key. 2. Press F2 (Auto calibration). A message appears on the display, asking you to remove all cables and probes from oscilloscope.

55 3. After removing all cables, press F2 (Auto calibration) again. The Auto-calibration automatically starts and a message appears, showing that the calibration is ongoing. To interrupt calibration, press any key during the calibration. 8.9 Making Automatic Measurements The oscilloscope can perform 18 types automatic measurements such as frequency, cycle, average value, peak-to-peak value , root mean square value, Vmax, Vmin, Vtop, Vbase, Vamp, Overshoot, Preshoot, Rise Time, Fall Time, +Width, -Width, +Duty, -Duty; and gives two kinds of measurement results simultaneously on the screen. The function menu for automatic measurements is described in the following list. Function menu Description Freq Measure the frequency of waveform. Period Measure the period of waveform. Mean Measure the average value of waveform. PK-PK Measure the peak-to-peak value of waveform. Cyc RMS Measure Root Mean Square (RMS) value of waveform. Vmax Measure the Vmax of waveform Vmin Measure the Vmin of waveform Vtop Measure the Vtop of waveform Vbase Measure the Vbase of waveform Vamp Measure the Vamp of waveform Overshoot Measure the Overshoot of waveform Preshoot Measure the Preshoot of waveform Rise Time Measure the Rise Time of waveform Fall Time Measure the Fall Time of waveform +Width Measure the +Width of waveform -Width Measure the -Width of waveform +Duty Measure the +Duty of waveform -Duty Measure the -Duty of waveform To measure the frequency of waveform with Measurement 1 and the peak-to-peak value of waveform with Measurement 2, do the following: 1. Press the MENU key and the function menu is shown at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select MEAS SET 1. Four options appear at the bottom of the screen. 3. Press the F1 key to select the frequency measurement. The measurement window on the screen shows the frequency of waveform. 4. Press the MENU ▲ or MENU ▼ key to select MEAS SET 2. Five options appear at the bottom of the screen.

56 5. Press the F4 key to jump to the PK-PK measurement. The measurement window on the screen shows the peak-to-peak value of waveform. Now, you can see a screen that looks like the following figure 45. Figure 45: Automatic Measurements 8.10 Setting the Cursor Measurements This oscilloscope allows you to make manual cursor measurements on time and voltage. 8.10.1 Setting the cursor measurement in normal mode The cursor measurement menus are listed and described in the following table. Function menus Settings Description Type OFF Voltage Time Close the cursor measurement. Display the voltage measurement cursor and menu. Display the time measurement cursor and menu. Delta Display the difference of measured value between the two channels Cur1 Display the relating measured value of Cursor 1 Cur2 Display the relating measured value of Cursor 2 To make a voltage measurement, doing the following: 1. Press the MENU key and the function menus are displayed at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select CURS MEAS. Five options are shown at the bottom of the screen.

57 3. Press F1 key to select the measurement type Voltage. Two purple crossing dashed lines V1 and V2 are shown on the screen. 4. Press OPTION and display as —Cursor 1 —Cursor 2 When setting OPTION ▲ or OPTION ▼, V2 will move up and down and the relating voltage value to the zero position of Channel 1 will show at the bottom of the screen. Setting OPTION ◄ or OPTION ►, V1 will move up and down and the relating voltage value to the zero position of Channel 1 will show at the bottom of the screen, at the same time the increment shows the absolute value of V1-V2 shown as Fig 46: Figure 46: Use the Cursor for a Voltage Measurement When log out submenu, every value will show on the right bottom of the screen as figure 47: Figure 47

58 To use the cursor for a time measurement, do the following: 1. Press the MENU key and the function menus are displayed at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select CURS MEAS. 3. Press the F1 key to select the measurement type as Time. Two vertical dashed lines T1 and T2 appear on the screen. 4. Press OPTION and display as —Cursor 1 —Cursor 2 Press ▲(OPTION) or ▼(OPTION) and see T1 move left and right and LCD display the time value match T1 to point position in panel; press ◄( OPTION) or ►( OPTION) and see T2 move left and right and LCD display the time value match T2 to point position in panel. Now, you can see a screen that looks like the following figure 48. Figure 48: Cursor time measurement When log out submenu, every value will show on the right bottom of the screen as figure 49:

59 Figure 49: Use the Cursor for a Time Measurement 8.10.2 Setting the cursor measurement in FFT mode FFT being on, the cursor measurement menus are listed and described in the following table. Function menus Settings Description Type OFF Range Frequency Close the cursor measurement. Display the vamp measurement cursor and menu. Display the freq measurement cursor and menu. Delta Display the difference of measured value between the two channels Curs1 Display the relating measured value of Cursor 1 Curs2 Display the relating measured value of Cursor 2 To make a range measurement, doing the following: 1. Press the MENU key and the function menus are displayed at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select CURS MEAS. Five options are shown at the bottom of the screen. 3. Press F1 key to select the measurement type Range. Two purple crossing dashed lines V1 and V2 are shown on the screen. 4. Press OPTION and display as —Cursor 1 —Cursor 2 Press ▲ (OPTION) or ▼ (OPTION) to see V1 move up and down and the panel will display the voltage value match V1 and Channel 1 Zero; Press ◄ (OPTION) or ► (OPTION) to see V2 move up and down and panel will display the voltage value match V2 to Channel 1 Zero. LCD panel also display the absolute value of V1-V2. Now, you can see a screen that looks like the following figure 50.

60 Figure 50: Cursor range measurement 8.11 Autoscale The function is applied to follow-up signals automatically even if the signals change at any time. Autoscale enables the instrument to set up trigger mode, voltage division and time scale automatically according to the type, amplitude and frequency of the signals. The menu is as follows: Function menus Settings Description Autoscale OFF ON Turn off Autoscale Turn on Autoscale Mode Horizontal Vertical HORI—VERT Only adjust vertical scale according to input signal. Only adjust horizontal scale according to input signal. Adjust both vertical and horizontal scales according to input signal. Display only one or two cycles in waveform. Display Multi-cycles in waveform. If you want to measure voltage of Channel 1, you can do as the follows: 1. Press MENU, the function menu will appear on the right of the screen. 2. Press MENU ▲ or MENU ▼ and choose AUTOSCALE, three options will show at the bottom of the screen. 3. Press F1 and choose ON.

61 4. Press F2 and choose HORI -VERT. 5. Press F3 and displays on the screen as figure 51: Figure 51: Autoscale Horizontal- Vertical multi-period waveforms Note: Things you should be ware when turning on Autoscale. 1. The symbol is flickering on the top left corner of screen every half second. 2. The oscilloscope is setting Triggers automatically for the incoming signal based on its best approach. Access from front panel to trigger controls is disabled. A warning message will be displayed on the bottom left corner of the screen when trying to change submenus of Trigger controls. 3. Oscilloscope is set as DC coupling with AUTO Triggering. A warning message is displayed when trying to change these settings. 4. The oscilloscope will turn off Autoscale if user is trying to adjust vertical position, voltage division, trigger level or time scale. To back to Autoscale, Press AUTOSET. 5. The oscilloscope is always on main time base. 6. The oscilloscope is turned into Peak Detection mode if it is in Average mode. 7. When video triggering, the horizontal time scale is 50us. If one channel is showing edge signal, the other channel is showing video one, the time scale refers to 50us as video one as standard. 8.12 Record Waveform record: The function provides you to set the time interval between the frames and record the waveform up to 1000 numbers and get the better analysis effect more than before

62 through Playback and Save functions. Four record modes: Record, Play back, Storage, OFF. Record：Record the waveforms up until the set number of frames at specified time intervals. Record menu list： Menu Setting Instruction Mode Record Play back Storage OFF Select record mode. Select play back mode. Select storage mode. Turn off all recorder functions. End frame 1-1000 Set number of record frames. Operate Play Stop Press to start recording. Press to stop recording. Interval 1 ms - 1000 s Set time interval between record frames. －－＞ 1/2 To next menu Refreshed ON OFF The waveforms are in the state of refreshing when recording. The waveforms stop refreshing when recording. Direction Increase Decrease The value increases from that of end frame to time interval The value decreases from that of end frame to time interval －－＞ 1/2 Back to previous menu. Note: Both the waveforms are recorded at record mode. If one channel is off when recording, the channel data is not available at Playback mode. Play back: Play back the recorded waveforms. Play back menu list： Menu Setting Instruction Play mode Loop Single Set repeat play mode. Set single time play mode. Operate Play Stop Press to start playback. Press to stop playing. Interval 1ms-20s Set up interval value between frames.

63 －－＞ 1/2 To next menu Start Frame 1-1000 Set start frame. Cur frame 1-1000 Select current frame to be played. End frame 1-1000 Set End frame. Direction Increase Decrease The value increases at the mode of setting start frame, cur frame and end frame The value decreases at the mode of setting start frame, cur frame and end frame －－＞ 2/2 Back to previous menu (Only when Sync is set as Line NUM). Note: the Run/Stop button can also replay or continue the waveform display. Storage: Store recorded waveforms in non-volatile memory according to the setup frames. Storage menu list： Menu Setting Instruction Start Frame 1-1000 Set first frame to be saved. End frame 1-1000 Set last frame to be saved. Direction Increase Decrease The value increases from the set start frame to the end frame The value decreases from the set start frame to the end frame －－＞ 1/2 To next menu Save Save recorded waveform to internal memory location. Load Recall recorded waveform from internal memory location. －－＞ 2/2 Back to previous menu. Record the waveform as follows: 1. Press the MENU key and the function menu appears at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select RECORD and five options are displayed at the bottom of the screen. 3. Press the F1 key to select the Record mode. 4. Press F2 and set the End frame at 300 (select the direction as Increase or Decrease in the second menu before step4). 5. Press F4 and set the time Interval to 1.00ms. 6. Press F5 to enter into the second menu.

64 7. Press F1 and select OFF to stop refreshing waveforms. 8. Press F5 to back up to the first menu. 9. Press F3 and select Play to operate. Shown as Fig.52 and Fig.53 Fig.52：the first page of the record Fig.53: the second page of the record 8.13 Using FFT An FFT breaks down signals into component frequencies, which the oscilloscope uses to display a graph of the frequency domain of a signal, as opposed to the oscilloscope's standard time domain graph. You can match these frequencies with known system frequencies, such as system clocks, oscillators, or power supplies. FFT in this oscilloscope can transform 2048 points of the time-domain signal into its frequency

65 components and the final frequency contains 1024 points ranging from 0Hz to Nyquist frequency. The following table describes the FFT menu: Function Menu Setting Instruction FFT ON OFF Turn on FFT function Turn off FFT function Window Rectangle Blackman Hanning Hamming Select window for FFT. Format dB Vrms Set Vrms as vertical scale unit Set dBVrms as vertical scale unit Zoom ×1 ×2 ×5 ×10 Set multiple ×1 Set multiple ×2 Set multiple ×5 Set multiple ×10 Taking the FFT operation for example, the operation steps are as follows: 1. Press MENU key and the function menu appear on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select FFT MODE. Five items selectable are available at the bottom of the screen. 3. Press F1 to set ON. The green waveform F is shown in the screen after calculation. 4. Press F2 to switch over Window including Hamming, Rectangle, Blackman and Hanning. 5. Press F3 to switch over Format dB and Vrms. 6. Press F4 to zoom in or out the waveform, the magnification includes ×1, ×2, ×5, ×10. 7. Press CHANNEL SETTING (red) ,  One of the following three prompts circularly will show at the bottom-left of the screen when the format is dB. ▲/▼— CH Volts/Div ▲/▼ — FFT dB Scale

66  If left bottom of the screen displays "▲/▼—FFT dB Scale ", press (red) and (red) button to adjust dB value of each DIV, including 1dB, 2dB, 5dB, 10dB, 20dB;  If left bottom of the screen displays "▲/▼—CH Volts/Div " , press (red) and (red) button to adjust voltage of channel, and " 2v~ "shows in left bottom of the screen;  If left bottom of the screen displays "▲/▼—FFT Zero", press ▲ (red) and ▼ (red) button to adjust the position of the waveform along the vertical position such as "FFT 1.20 divs". 8. Press OPTION, the following prompts shows on the left bottom on the screen. ◄/►— Time Base ▲/▼— Trig Or ◄/►— Time ▲/▼— Trig When "◄/►— Time" is displayed, press OPTION ◄ and OPTION ► menu button to adjust the position of the waveform along the horizontal position. "FFT -2.00divs" shown on the left bottom means the section start of the waveform departures from the Origin for 2.00DIV. The shown frequency of M is the exact frequency of the cursor point in the middle of spectrum. Shown as Figure.54. When "◄/►— Time Base" is displayed, press OPTION ◄ and OPTION ► to adjust horizontal base on horizontal base, such as "250 Hz （5 kS/s）" will be shown on the bottom status bar.

67 Figure 54 The Shown Frequency of M Selecting an FFT Window ■ The FFT feature provides four windows. Each is a trade-off between frequency resolution and magnitude accuracy. What you want to measure and your source signal characteristics help determine which window to use. Use the following guidelines to select the best window. Type Description Window Rectangle This is the best type of window for resolving frequencies that are very close to the same value but worst for accurately measuring the amplitude of those frequencies. It is the best type for measuring the frequency spectrum of nonrepetitive signals and measuring frequency components near DC. Use rectangle for measuring transients or bursts where the signal level before and after the event are nearly equal. Also, use this window for equal-amplitude sine waves with frequencies that are very close and for broadband random noise with a relatively slow varying spectrum. Hamming This is a very good window for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy over the rectangle window. It has a slightly better frequency resolution than the Hanning. Use Hamming for measuring sine, periodic and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different.

68 Hanning This is a very good window for measuring amplitude accuracy but less so for resolving frequencies. Use Hanning for measuring sine, periodic and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are significantly different. Blackman This is the best window for measuring the amplitude of frequencies but worst at resolving frequencies. Use Blackman-Harris for measuring predominantly single frequency waveforms to look for higher order harmonics. Fig55, 56, 57, 58 show four kinds of window function referring to sine wave of 1 kHz. Fig 55: Rectangle window Fig 56: Blackman window

69 Fig.57. Hanning window Fig.58. Hamming window Quick Tips  If desired, use the zoom feature to magnify the FFT waveform.  Use the default dB scale to see a detailed view of multiple frequencies, even if they have very different amplitudes. Use the Vrms scale to see an overall view of how all frequencies compare to each other.  Signals that have a DC component or offset can cause incorrect FFT waveform component magnitude values. To minimize the DC component, choose AC Coupling on the source signal.  To reduce random noise and aliased components in repetitive or single-shot events, set the oscilloscope acquisition mode to average. Term interpretation Nyquist frequency: The highest frequency that any Real Time Digital Oscilloscope can measure

70 is exactly half of the sampling rate under the condition of no mistakes, which is called Nyquist frequency. If under-sampling occurs when the frequency sampled is higher than Nyquist frequency, "False Wave" phenomenon will appear. So pay more attention to the relation between the frequency being sampled and measured. NOTE： While FFT mode is turned on, DO NOT USE THESE SETTINGS: 1) Horizontal window setting. 2) Trigger control "SET 50%" 3) Auto-scale function 4) Wave record; 5) Measure 1 and Measure 2. 8.14 System State Menu The system state menu is used to display information about the present horizontal system, vertical system, trigger system and others. The operation steps are shown as below. 1. Press the MENU key and the function menu is displayed at the right of the screen. 2. Press the MENU ▲ or MENU ▼ key to select the SYS STAT. Four options appear at the bottom of the screen. 3. Sequentially press F1 to F4 key and the corresponding state information will be shown on the screen. 4. The screen that looks like the following figure 59 will be displayed. Figure 59: System State

71 8.14.1 Real time clock Function: Be synchronous with the U disk storage time. Do below steps to set up the real time clock: 1. Press MENU key and the function menu is displayed on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key and select SYS STAT and there will be 4 items displayed at the bottom of the screen. 3. Press F4 key and select Misc to display the system time, see Fig.60. Fig.60: System Time 4. Press OPTION to enter into timing mode and if that the background colour of the year, month, date, hour, minute, second which are in need of correct be deepened, the value can be adjusted. 5. Press OPTION▲ or OPTION▼ to change the corresponding value of the year, month, date, hour, minute and second effectively. 6. Press OPTION ◄ or OPTION ► to switch to the year, month, date, hour, minute and second that are in need of adjustment. 7. Press OPTION to enter into normal time mode after timing. 8. If need to timing, please kindly repeat the above steps. Note: The digital clock stops working when in time calculating mode. 8.15 Setting of Time Base Mode The time base mode menu is explained as the following table. Function menu Setting Explanation Main TimeBase Horizontal main time base is used to wave display Zone Window Use two cursors to define a window area Window Expand the defined window to full-screen display For the operation of window extension, please execute the following steps:

72 1. Press MENU key, display the function menu on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select TIME MODE, display three options at the bottom. 3. Press F2 key to select Zone Window. 4. Press OPTION key to pop up TIME BASE, at this time, then press ◄ (OPTION) and ► (OPTION) key to adjust the time base window area defined by two cursors, the window size will vary. 5. Press OPTION key and call TIME, at this time, press ◄( OPTION) and ►( OPTION) to adjust the window position defined by two cursors, the window position is the time difference of the window center to main time base's horizontal pointer. 6. Press F3 key, select Window, the defined window extends into the full-screen display. The screen that looks like the following figure 61, 62 will be displayed. Figure 61: Zone Window Figure 62: Window

73 8.16 Data Transmission For the operation of data transmission, please execute the following steps: 1. Press MENU key, display the function menu on the right side of the screen. 2. Press MENU ▲ or MENU ▼ key to select DISP SET. 3. Press F4 key, select the Bitmap or Vectors for data transmission. The oscilloscope supports communications with a PC through USB. You can use the Oscilloscope communication software to store, analyse, and display the data and allow remote control. Here is how to connect with PC via USB port. 1. To install the oscilloscope software, insert the CD rom and it should auto run or if not, double click on the CD rom desktop icon or run the setup.exe 2. Allow the default location or click 'Browse' and create or select a destination folder of your choice. 3. Click on 'OK' then select or create the destination location in the Start Menu for the programs shortcut icons. Finally click 'Install' to copy the files onto your PC. In the event that the DSO USB driver is not automatically installed by the Windows system, the USB driver may need to be manually installed. The following steps can be used to install the driver. Following this the PC software programs will recognise the oscilloscope and run normally. 1. Connect the Oscilloscope to the computer using the supplied USB cable and verify that the device is powered on. 2. Open the Window Device Manager by right clicking on 'My Computer' icon then selecting 'Manage' from the left hand column. 3. Click on 'Device Manager' and the list of devices will display on the right hand panel. 4. Find the USB device. It may be listed as "Unknown Device" possibly in "Other devices" section marked with a yellow exclamation icon. 5. Right click the USB device and select 'Update Driver Software' 6. In the next screen select 'Browse my computer for driver software' 7. Browse to the file location where you previously installed the oscilloscope software. 8. Click on the folder "USBDRV" then choose the option for which version of Windows operating system you are using. 9. Click next and the USB driver should install. 10. When the operation is complete click 'Close' 11. In Device Manager the oscilloscope should now be named correctly. 12. Close Device Manager.

74 On running the PC oscilloscope software, a valid connection between the oscilloscope and the PC is indicated in green on the bottom right hand corner of the screen.

75 9. Trouble Shooting 1. The oscilloscope does not power up It may be caused by the dead battery. At this time, the oscilloscope will not start even if it is powered by the battery charger. Firstly, charge the battery and supply the oscilloscope with power through the battery charger. However, don't switch on the oscilloscope until waiting for 15 minutes. 2. The oscilloscope stops working only after operating for several seconds Probably the battery is dead; Check the battery symbol at the upper left of the screen. The symbol indicates that the battery has been run out of power and must be charged. 3. The measurement type displays ERR when you switch to the Multimeter mode. Probably you do not select the measuring mode. In this case, push down any key of the three keys A, V or R. Thus, the relative measuring mode will be shown on the screen. If the ERR is still displayed, restart the oscilloscope. 4. The measured voltage amplitude value is 10 times larger or smaller than the real value under the oscilloscope mode. Check whether the channel attenuation level matches the actual probe attenuation ratio. 5. The waveform is displayed on the screen but is not stable under the oscilloscope mode.  Check whether the signal item in the trigger mode menu matches the actually used signal channel.  Check on the trigger mode: The edge trigger mode is applicable to the universal single and the video trigger mode applicable to the video signal. Only when the proper trigger mode is applied, can the waveform be in stable.  Try to change the trigger coupling into the HF rejection and LF rejection to filter the HF or LF noise trigger by the interference. (Only for the models that have this function.) 6. There is no display on the screen when you push down RUN/STOP key under the oscilloscope mode. Check whether the trigger mode in the trigger mode menu is in normal or single shot and whether the trigger level is out of the waveform range. In such condition, adjust and make the trigger level in the middle or select the non-auto trigger mode. Additionally, press the AUTO SET key and complete the above setting 7. When select the average sampling in the sampling mode or select a longer display time in the display mode under the oscilloscope, the display speed is slow. It is normal in the above case.

10.1.1 Oscilloscope Only if other instructions are provided, are all technical specifications applicable to the probe with the 10X attenuation switch setting and the HDS-N series digital type oscilloscope. In order to be up to these specifications, the oscilloscope should meet the following requirement. ■ The instrument should operate continuously for more than 30 minutes under the specified operating temperature. ■ If the operating temperature is up to or larger than 5 Celsius degrees, the system function menu must be opened to make the system perform a "Auto- calibration" procedure (see "calibration" on P54). Except those specifications marked with the word Typical, all specifications can be up to. Sampling Sampling modes Normal sampling Peak detection Average value Sampling rate MP720014 Max 500 MS/s MP720015 Max 500 MS/s Input Input coupling DC, AC, Ground Input impedance 1 MΩ±2% connected in parallel with 20 pF±5 pF Probe attenuation coefficient 1X, 10X, 100X, 1000X Max. Input voltage 400 V (peak) Channel delay time（typical） 150 ps Horizontal Sampling rate range MP720014 0.25 S/s - 500 MS/s MP720015 0.25 S/s - 500 MS/s Waveform interpolation （sin x）/x Record length 6k points on each channel Scanning speed range （S/div） 5ns/div - 100s/div, stepping in the "1-2-5" mode

time accuracy ±100ppm (any time interval which is equal to or larger than 1ms) Time interval ( △ T)measurement accuracy （full bandwidth） Single: ±(1 sampling interval time +100ppm×reading+0.6ns) >average 16 : ±(1 sampling interval time +100ppm×reading+0.4ns) Vertical Analog digital converter （A/D） With the resolution of 8 bits, make sampling on both channels synchronously. Displacement range ±2 V(5 mV/div ~ 200 mV/div), ±50 V(500 mV/div ~5 V /div) Analog bandwidth MP720014 20 MHz MP720015 60 MHz Single bandwidth Full bandwidth Low frequency response （AC coupling, -3dB） ≥10 Hz（at the BNC ） Rise time（typical one at the BNC） MP720014 ≤17.5 ns MP720015 ≤ 5.8 ns DC gain accuracy ±3% DC measurement accuracy （ average value sampling mode） The voltage difference (△V) between any two points on the waveform after averaging the captured waveforms more than 16: ±(5% reading + 0.05 divisions). Trigger Triggering level range ±6 divisions from the screen center Triggering level accuracy (typical) which is applicable to the signal with rise and fall time equal to or longer than 20ns ±0.3 divisions Trigger displacement 655 divisions for pre-triggering and 4 divisions for post- triggering. Trigger Holdoff range 100 ns – 10 s Make a 50% level setting (Typical). Operation with the input signal frequency equal to or larger than 50Hz.

frequency (Video triggering mode) Support the NTSC, PAL and SECAM broadcasting systems of any field or line frequency. Readout resolution 6 digits Frequency range AC coupling, 2 Hz to full bandwidth Single source  When the triggering mode is edge triggering, it is a one channel Cymometer.  When the triggering mode is video triggering，the Cymometer will not work.. Measurement Cursor measurement Voltage difference (△V) and time difference (△T) between cursors Auto measurement Peak-to-peak value, average value, root mean square value, frequency , period，Vmax, Vmin，Vtop, Vbase, Vamp, Overshoot, Preshoot, Rise Time, Fall Time, +Width, -Width, +Duty, -Duty. Probe 1X position 10X position Bandwidth Up to 6 MHz (DC) Up to full bandwidth (DC) Attenuation rate 1: 1 10: 1 Compensation range 15 pf – 35 pf Input resistance 1 MΩ ± 2％ 10 MΩ ± 2％ Input Capacitance 85 pf – 115 pf 14.5 pf - 17.5 pf Input voltage ＜200 V DC + Peak AC ＜600 V DC + Peak AC 10.1.2 Meter Voltage (VDC) Input Impedance: 10 MΩ. Max. Input Voltage: 1000 V (DC or AC peak value) Range Accuracy Resolution 400.0 mv ±1%±2 digits 100 uV 4.000 V 1 mV 40.00 V 10 mV 400.0 V 100 mV 1000 V 1 V

Max Input Voltage: 750 V (AC, RMS value) Frequency range: from 40 Hz to 400 Hz Display: RMS value of the sine wave Range Accuracy Resolution 4.000 V ±1%±3 digits 1 mV 40.00 V 10 mV 400.0 V 100 mV 750 V ±1.5%±3 digits 1 V Direct Current (DC) Range Accuracy Resolution 40.00 mA ±1.5%±1 digit 10 uA 400.0 mA ±1.5%±1 digit 100 uA 10 A ±3%±3 digits 10 mA Alternating Current (AC) Range Accuracy Resolution 40.00 mA ±1.5%±3 digits 10 uA 400.0 mA ±2%±3 digits 100 uA 10 A ±5%±3digits 10 mA Resistance Range Accuracy Resolution 400.0 Ω ±1%±3 digits 0.1 Ω 4.000 kΩ 1 Ω 40.00 kΩ 10 Ω 400.0 kΩ 100 Ω 4.000 MΩ 1 kΩ 40.00 MΩ ±1.5%±3 digits 10 kΩ Capacitance Range Accuracy Resolution 51.20 nF ±3%±3 digits 10 pF 512.0 nF 100 pF 5.120 uF 1 nF 51.20 uF 10 nF 100 uF 100 nF Diode: Voltage reading: 0 V - 1 V. On-off Test: There is a beep sound when the on-resistance is less than 50 Ω.

Basic parameter Mechanical dimension 18 cm×11.5 cm×4 cm Weight 645 g Power consumption ＜ 6 W Display type 3.7" colour liquid crystal display Display resolution 640 (horizontal) ×480 (vertical) pixels Display colour 65536 colours Power Adapter Power supply 100 - 240 V AC 50/60Hz Voltage output 8.5 VDC Current output 1500 mA Battery type: 7.4V built-in Li-ion battery. Working environment Temperature Operation Used battery 0 to 50 °C (32 to 122 °F) Power adapter 0 to 40 °C (32 to 104 °F) Storage -20 to 60 °C (-4 to 140 °F) Humidity Operation 0 to 10 °C (32 to 50 °F) no condensation 10 to 30 °C (50 to 86 °F) 95 % 30 to 40 °C (86 to 104 °F) 75 % 40 to 50 °C (104 to 122 °F) 45 % Storage -20 to 60 °C (-4 to 140 °F) no condensation

10.2.1 Maintenance Do not store or place the instrument in locations where the liquid crystal display (LCD) may be directly exposed to the sunshine for long periods. Be careful: Do not spray liquid into the instrument. Cleaning To clean the instrument exterior, perform the following steps: Wipe the dust from the instrument surface with a soft cloth. Avoid scratching the LCD screen. Clean the instrument with a lightly damp soft cloth. It is recommended to wipe with mild detergent or fresh water. To avoid damage to the instrument, do not use any corrosive chemical cleaning agent. Dirt or moisture in the terminals can distort readings. Follow the steps below to clean your multimeter. 1. Turn the multimeter off and remove the test leads. 2. Turn the multimeter over and shake out the dirt in the terminals. 3. Wipe the contacts in each terminal with a clean swab dipped in alcohol. Warning: Before running, please confirm that the instrument has been dried out so as to avoid electrical short circuit and personal injury caused by moisture. 10.2.2 Storage of Oscilloscope If the test tool is to be stored for a long time, it is required to charge the lithium battery before storage. Charging the oscilloscope The lithium battery is possibly not fully charged on delivery. To make the battery with enough electric quantity, it must be charged for 4 hours (the test tool must be turned off during charging). The battery can supply power for 4 hours after being charged completely. When supplying power by using the battery, a battery indicator is displayed on the top of the screen to show the power reserve. shows that the battery can only be used for about 5 minutes. To charge the battery and power the instrument, connect the oscilloscope using a power adapter according to Figure 1. The charging speed can be increased by powering off the instrument. Notice To avoid overheating of the battery during charging, the environment temperature is not recommended to exceed the permissible value given in the technical specification. Note: No hazard will occur when connecting the charger for extended periods. The instrument can automatically switch to reduced charging status.

It is usually not required to replace the battery unit, but if it is required to replace it, only qualified personnel can carry out this operation, and only use the same specification lithium battery. INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF ELECTRICAL & ELECTRONIC EQUIPMENT. When this product has reached the end of its life it must be treated as Waste Electrical & Electronics Equipment (WEEE). Any WEEE marked products must not be mixed with general household waste, but kept separate for the treatment, recovery and recycling of the materials used. Contact your local authority for details of recycling schemes in your area. Made in China LS12 2EN