USER`S GUIDE
Contents
1. capacity testing mode Battery Voltage 2 17 Von Voff Operation You can set voltage value Von Voff to control the input state on off for electronic load When the input voltage reaches the Von value the load s input state is on When the input voltage reaches the Voff value the load s input state is off Action for set Von Voff value 1 Press Menu J into menu 2 VFD displays gt CONFIG press key V to choose gt SYSTEM SET press to confirm 3 VFD displays gt MAX CURRENT SET press V key to choose gt VOLTAGE ON SET press Enter key to confirm 4 VFD displays gt VOLT ON 0 00V press numeric keys to set Von value 0 1V to max voltage value press Enter to confirm 5 Press V key to choose gt VOLTAGE OFF SET press to confirm 6 VFD displays gt VOLT OFF 0 00V press numeric keys to set Voff value OV to max voltage value press to confirm 28 USER S GUIDE ITECH ELECTRONICS Chapter 3 Installation Your Power Test Solution Chapter 3 Installation 3 1 Inspection Damage When you receive your electronic load inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and nearest Agent office and Support Office immediately Items Supplied The following user replaceable items are included with your electronic load Part Number Description Es 5 Users will get one of the power cords Power Cord E173 appropriate for your l2. 285 20684 153 783 Rm601 ByuckSan GaSan Dong Seoul Korea
3. Chapter 2 General Information Your Power Test Solution Operation Range Work in the range of Rated Current Rated voltage and Rated Power The figure is as following A a et D Q lt 2 et D Q Rated power A ADVLIOA LAdNI Input current Rated current Operation mode change state A fes et D Q lt 2 et Q Q Software Power Limit Software Current Limit A ASVLIOA LNANI and A Input current Rated current 2 13 Protection Features Electronic load includes the following protection features Over Voltage If input voltage exceeds the voltage limit set by the user the DC load will turn the input OFF and the buzzer will turn on The display will show OVER VOLTAGE as following The maximum voltage limit value is equal to 100 5 of the maximum rated voltage for each model OVER VOLTAGE USER S GUIDE 23 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution Over Current When operating in CR CC or CP mode the load current will be limited by a current limit value set by the user The maximum current limit value is equal to the maximum rated current for each model Once the maximum current limit is reached the DC Load will enter the over current protection state If the DC load previously operated CR or CP mode the DC load will automatically revert to CC mode and the VFD display will indicate CC When the DC load operates in a combined CV transition mode o
4. EZ 13 I LOAD CURRENT CONSTANT POWER MODE 18 USER S GUIDE ITECH ELECTRONICS Chapter 2 General Information Your Power Test Solution 2 9 Transient Operation Transient operation enables the electronic load to periodically switch between two load levels as might be required for testing power supplies A power supply s regulation and transient characteristics can be evaluated by monitoring the supply s output voltage under varying combinations of load levels frequency and duty cycle Transient operation can be turned on and off at the front panel or PC via the IT E131 isolated communication cable Before you turn on transient operation you should set the desired mode of operation as well as all of the parameters associated with transient operation Transient operation may be used in the CC CR or CV or CW modes and can be setup in continuous pulsed or toggled operation mode Continuous Generates a repetitive pulse stream the toggles between two load levels and change the state between value A and value B 2 0ms 3 0ms Continuous Transient Operation USER S GUIDE 19 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution Pulse Switch to value B as receiving one trigger signal taking the pulse time TWD of value B Load will return to Value A TWD TWD De a DEN TRIG TRIG Pulsed Transient Operation Trigger Mode Switching the state between value A and value B once recei
5. Pperauon moge sers cude Protocol information Controller Program and Software driver CD ROM Power View PV8500 software If you ve purchased the communication cable Active driver PD8500 OCX software you will get it for free 14 USER S GUIDE ee ene Chapter 2 General Information 2 3 Options and Accessories Options IT E151 Rack mounts kit for install one or two IT8500 series load on the 19 inch rack IT E131 isolated communication cable This cable converts the electronic load s serial port TTL 5V level to PC RS232 interface IT E132 isolated communication cable This cable converts the electronic load s serial port TTL 5V level to PC USB interface IT E134 isolated communication cable This cable converts the electronic load s serial port TTL 5V level to PC GPIB interface Accessories Power cord User manual Software CD Rom if you buy the communication cable you ll get it for free Calibration testing report 2 4 Description The IT8500 series electronic load is used for design manufacturing and evaluation of DC power supplies batteries and power components and so on The electronic load contains a processor serial port connector front panel keypad and VFD and other circuits common to the other entire load module T8500 series electronic load could work in constant current CC mode constant voltage CV mode or constant resistance CR mode and constant power CW mode 2 5 Features and Capab
6. Run well if no such display 3 Wait for another 2S ERROR CAL DATA system will go to the step 4 directly LOAD MODEL IT85XX 4 Press Shift button and SN XXX XXX XXX VER x xx Display the information of the product Type series number version of software Display the actual input voltage 5 Press S button 0 000V 0 000A aid 9 and current value Display the actual power value 6 Press AV 0 000W I 0 000A aim p and setting value USER S GUIDE 35 Chapter 4 Turn On Checkout ITECH ELECTRONICS Your Power Test Solution In Case of Trouble Electronic load failure to run during power on operation The test of following in this section help you to solve the possible problem when you turn on the power of electronic load 1 Make sure if you have connected the power cord to the unit and plug it in Power switch have been pressed 2 Check the power voltage setting Work voltage of load have two type 110V or 220V Please make sure it is right voltage accordance to the voltage in your area You could change the voltage setting through dial the switch in the rear panel 3 Check the fuse of load If fuse is blowout please change it as following specification Fuse specification bed 110VAC Fuse specification 220VAC 118511 TODA 250V TO 3A 250V 118512 TO 5A 250V TOA 250V IT8512B TO 5A 250V TO 3A 250V IT8512C TO 5A 250V TO 3A 250V 4 Location of Fuse 36 USER S GUIDE ITECH ELECTRONICS Chapte
7. V Rotary knob to adjust the resistance value Step 3 Press to confirm 0 000W V 3 000V 5 Shift Store Procedure Operation details VFD display Step 1 Press and VOLTAGE 1 500V Step 2 Press to confirm VOLTAGE y 6 Shift Recall Procedure Operation details VFD display Step 1 Press and RECALL 1 Step 2 Press to confirm Recall the saving data 7 In On Off input setting Use to change the input state of electronic load Switch on to off state by press 8 Transition Parameter Setting Users could press CShift_ G Tran to set the transition parameter gt CONTINUOUS gt PULSE Choose one of the three transition modes gt TOGGLED Finish transition setting USER S GUIDE 39 Chapter 5 Front Panel Operation 9 Continuous Transient Operation In this mode electronic load will generates a repetitive pulse stream that toggles between two load levels Load could switch the state between two setting value value A and value B In this following example assume that the CC mode is active the applicable transient operation parameters have been set as follows For example Continuous mode current level A 5A width 2mS Current level B 10A width 3ms Testing machine input voltage is 12V 2 0ms 3 0ms Continuous Transient Operation Action 1 Select the operation mode CC CV CR or CP and set a proper value press to turn off the load input Press Shi Tran set LEVEL A 5A
8. panel key T Battery discharge electronic operation Turn on or turn off short circuit Test Causes a trigger to occur Change the trigger source is IMMEDIATE USER S GUIDE 11 ITECH ELECTRONICS Chapter 1 Quick Reference Your Power Test Solution 1 6 Menu Operation Press Menu to indicate operation mode View the menu in VFD and using V and A to scroll through the completely menu list as following If press key you could get the selected menu function Press back Es to the previous menu selection page Menu CONFIG A INITIAL CONFIG eturn to the factory default setup value POWER ON RECALL Setting Power on state of Load When users turn on the electronic load the electronic load ml value will keep the state of last time when users turn off the electronic load OF F lt DEFAULT gt Disable this function INPUT RECALL Setup the electronic load input state as it is turned on When users turn on the electronic load the electronic load ON input will keep the state of last time when users turn off the electronic load When users turn on the electronic load the electronic load OFF lt DEFAULT gt l l input state will keep the off OFF Disablekeysound S Setup rotary knob lock state OFF lt DEFAULT gt Unlock Rotary knob SHORT CUT RECALL Fast recall the data stored before A A RANG SELECT Change the measure precision of voltage and current TI A REMOTE SENSE Setup voltage measurement Mode ON The electronic lo
9. 0 list steps gt lt OAD O N TIMER MER STATE Setting LOAD ON timer state When users choose ON and then turn on the electronic load input the LOAD ON TIMER will start working When the LOAD ON TIMER is reach the setup time the electronic load input will turn off automatically a Z OFF lt DEFAULT gt TIMER SET EXIT AAA EXIT AAA USER S GUIDE 13 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution Chapter 2 General Information 2 1 Document Orientation This manual describes the operation of the IT8500 electronic loads Unless otherwise noted all units will be referred to by the description electronic load throughout this user manual The following documents and software are shipped with your electronic load This User s Guide this document contains installation checkout front panel information and detailed programming information The Getting Started Map will help you find the information you need to complete the specific task that you want to accomplish Refer to the table of contents or index of each guide for a complete list of the information contained within 2 2 Getting Started Map Where to find information Checking out the unit Verifying proper operation User s Guide Using the front panel Using the front panel Front panel keys User s Guide Front panel examples Using the programming interface Jore cue RS 232 interface Remote
10. AAA 22 Input On Off CAER TE AAA AAA AA e ee eee eee 22 Operation Range EEE EE EE ET ET EE 23 2 13 Protection Features ce RE TE EE ER EE EE rT eee 23 2 14 Remote Sense Function aa 25 2 15 Saving And Recalling Settings DERE A Tre ER ee AAA AAA AAA 26 2 16 Battery Testing aa 27 2 17 Von Voff Operation A A AA NA 28 Chapter 3 Installation ns 29 3 1 Inspection a 29 2 USER S GUIDE ITECH ELECTRONICS Introduction Your Power Test Solution Damage Da a oo 29 Items Supplied o A li ere eee eee Te Cee das 29 Cleaning eee Te eT E eee TE CUR Ce ee eI ET 29 3 2 Location EEE AA DA A AA eT AER Te 30 3 3 Bench Operation Sr re iT ee ee ere re er ere EE ret rT ee errr ere tre er re eer ee ere errr 31 3 4 Rack Mounting ree ee ee ee er ee ee ee er re er eee eee reer 31 3 5 Input Connections ICAA AAA AI A AO 33 Power Cord id iia ii da 33 Chapter A Turn On Checkout O 35 4 1 Introduction o sxxxssennnnnnnennnnnnernnnnnennnnnnennnnnnnnnnnnnnnnunnnnenunnnnennunnnennunnnnnnunnnnenunn 35 42 Checkout Procedure gt creer 35 In Case Of Trouble 0 xxxxnnnnnnnnnnnnnnnnnunnnnnnnnnnvnnnnennennnnnnneenennnnnnennnnnnnnnnnennnnnen 36 Chapter 5 Front Panel Operation ED Y 5 1 Example rene 37 1 set set up a constant current from O to Max current oseeeeeeeeeererererrererrreeerren 37 2 P set set up a constant power from O to Max power trtttttmmmtmnennnnnnnnnoneninenos 38 3 R set set up a constant resistance from 0 10 to 400000 rrrrrrrrrrrrrrrrr
11. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met Caution The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met USER S GUIDE 7 ITECH ELECTRONICS Chapter 1 Quick Reference Your Power Test Solution Chapter 1 Quick Reference 1 1 The Front Panel 120V 150W DC ELECTRONIC LOAD 11 16 character display shows voltage and current measurements BR Rotary knob 5 Input terminals 4 Keypad Enable disable input Setup the current resistance and voltage modes Set and reset protection functions Scroll through front panel Entry keys numeric keys Enter values nlncreasing or decreasing the setup values Menu commands e Power switch ON OFF el 8 USER S GUIDE ITECH ELECTRONICS Your Power Test Solution Chapter 1 Quick Reference 1 2 The Rear Panel 4 Pin Trigger and Remote sensing connectors 9 Pin COM port interface connector Power switch 110V 220V 3 Pin IEC320 AC input connector Power code requires ground conductor el el EI 1 3 Front Panel Annunciators NANA NAI PAY AE VA USERS GUIDE 9 Chapter 1 Quick Reference SE Bn edle cere l l Indicates that the elec
12. USER S GUIDE TECH Models IT 8500 series This user manual is applicable to Model 1T8511 1T8512 1T8512B IT8512C 7 0000 El 210000 J100066 PT Copyright 2010 All Rights Reserved Ver3 0 Jan 2010 1T8500 401 ITECH ELECTRONICS Introduction Your Power Test Solution Chapter A Quick Reference HEEEEENEENNENENEEEEEEENENEEEEEEEEEENNNNNNENEEEEEEEEEEEE 8 1 1 The Front Panel na 8 1 2 The Rear Panel AAA 9 1 3 Front Panel Annunciators EE ee Ie 9 1 4 Key Pad a 10 15 Immediate Action Keys A A ee ee ee eee re eo Ea 11 1 6 Menu Operation Tr Tie te te eT ere EN eri ee rr a a a ee ee ee 12 Chapter 2 General Information a 44 2 1 Document Orientation DAS A AAA A AAA EE 14 22 Getting Started Map iii 14 2 3 Options And Accessories eee ee eee ee eee A A AA AAA 15 24 Description na 15 25 Features And Capabilities Serr TT ee eee er eT ee ee ee ee ee re re er re eee ee sree ee 15 2 6 Front Panel Controls na 16 2 7 Remote Programming RE ETE AAA AAA A 16 28 Operating Modes AAA AAA AA AA A AAA 16 Constant Current Cc Mode A EE EA AA AA RA AAA AAA 17 Constant Resistance Cr Mode EEE EE RR EE ee 17 Constant Voltage Cv Mode AS AA ANE EE omar 18 Constant Power Cw Mode PETE A cree er eee eee er eee eee ee 18 29 Transient Operation naaa 19 Continuous ii io 19 Pulse DUDAR DAA AAA AR AA AAA AA 20 Trigger Mode dE AAA AAA A AA EE 20 2 10 List Operation a 21 2 11 Triggered Operation aaa 21 2 12 Input Control a 22 Short On Off AAA AAA AA
13. ad will measure input voltage from the remote sense connector The electronic load will measure input voltage from the front OFF lt DEFAULT gt panel connector ADC UPDATE RATE gt HIGH LOWSDEFAULT gt o EXTERNAL Trigger signals from the TRIG connector in the rear panel O TI TI O Z O Z 12 USER S GUIDE ITECH ELECTRONICS Chapter 1 Quick Reference Your Power Test Solution BUS ONNECT MODE MAXTIDLEXING SEPARATE lt DEF gt BAUDRATE SET 600 lt DEFAULT gt Communication command trigger mode Setting baud rate 9200 8400 COMM PARITY SET NONE lt DEFAULT gt VEN QJ gt O OD oO Command parity setting ADDRESS SET KEY LOCK SET EXIT EM SET MAX CURRENT SET MAX POWER SET MAX VOLTAGE SET VOLTAGE ONSET VOLTAGE OFFSET EXIT Setting communication Flow mode Setting keypad password ep YST etup the maximum current etup the maximum power etup the maximum voltage Cp ep m MODE SET IXED MODE IST MODE CALL LIST FILE EDIT LIST FILE LIST STORE MODE X 120 STEPS X 250 STEPS X 500 STEPS X 1000 STEPS Setting operation mode Fixed mode Choosing List mode Recall list operation file Edit list operation file sers can choose 4 kind of memory space to save the list file otal 8 files and each file have120 list steps otal 4 files and each file have250 list steps otal 2 files and each file have500 list steps otal 1 file and each file have100
14. at most here they are 6 steps Press 6 to set TEST COUNT 6 press to confirm 8 Setting the mode of current procedure press Wto choose one mode in CONST CURRENT CONST VOLTAGE CONST POWER CONST RESIS Here the first step is CC mode press A Wto gt CONST CURRENT press to confirm 9 VFD shows SET 1 20 000A which means setting the current procedure Here the first sis 0 21A press then press Genter to confirm 10 Setting whether the current procedure is short circuit or not press A Wto choose one in SHORT ON or SHORT OFF Here the first step is SHORT OFF Press SHORT OFF press to confirm 11 Select the test number of this step press A W to choose gt READBACK V Press to confirm 12 VFD displays MIN 1 120 00V which means setting the lower limit Here the first step is 5 8V Press 8 press Genter to confirm 44 USER S GUIDE ITECH ELECTRONICS Chapter 5 Front Panel Operation Your Power Test Solution 13 VFD displays MAX 1 120 00V which requests setting the upper limit Here the first step is 6 15V press 6 then press ER to confirm 14 VFD shows DELAY 1 1 0 S which means setting the prolong time that is how long we can read the testing value after inputting the value we settled To wait for testing after the input stable the range of prolong time is 0 25 5 seconds when the setting is 25 5 seconds automatic testing will be pause only the user press Shift
15. ay at A Please see the following description Then press I set to confirm the value 0 00A 0 00V 0 0W 4 33A USER S GUIDE 37 Chapter 5 Front Panel Operation GE Ape Procedure Step1 Press button Step2 Adjust the Rotary knob to change the value the operation is as the same as item 1 Step5 Press button to confirm the current value 2 P set set up a constant power from 0 to Max power T8500 series electronic load can be set up for a constant power Constant power setup procedure is as following Procedure Operation details VFD display Step 2 Enter a new value by using numeric keys or POWER W Rotary knob to adjust the voltage value Step 3 Press to confirm 0 000W P 000W 3 R set set up a constant resistance from 0 10 to 40001 T8500 series electronic load can be setup for a constant resistance Constant resistance setup procedure is as following Procedure Operation details VFD display Step 2 enter a new value by using numeric keys or RESISTANCE R Rotary knob to adjust the resistance value Step 3 Press to confirm 0 000W R 0000R 4 V set set up a constant voltage from 0 1V to Max voltage T8500 series electronic load can be setup for a constant voltage Constant voltage setup procedure is as following 38 USER S GUIDE Eeg sd bok den Chapter 5 Front Panel Operation Procedure Operation details VFD display Step 2 enter a new value by using numeric keys or VOLTAGE
16. e more than 5m Sec to the trigger terminals in rear panel to trigger the electronic load Command triggering mode Send triggering command to the electronic load via the serial port USER S GUIDE 21 ITECH ELECTRONICS Chapter 2 General Information vem Poe tet Souls 2 12 Input Control Short On Off Load can simulate a short circuit at its input by turning the load on with full scale current The short circuit can be toggled on off at the front panel using the Short operation is not influence the operation setting current value When short operation is on OFF state Load back to the original setting state The actual value of the electronic short is dependent on the mode and current range that are active when the short is turned on Note Turning the Short Test on in CV mode may cause the load to draw so much current that the software current limit operates which may turn the input off Turning the short circuit on does not affect the programmed settings and the load input will return to the previously programmed values when the short is turned off Input On Off Electronic load s input can be toggled on off at the front panel Turning the input off zero current does not affect the programmed settings The input will return to the previously programmed values when the input is turned on again Note The Input On Off command supersedes the mode commands and Short Test On Off command 22 USER S GUIDE ITECH ELECTRONICS
17. he accident including but not limited to lightning water fire abuse or negligence Assistance The above statements apply only to the standard product warranty Warranty options product maintenance agreements and customer assistance agreements are also available USERS GUIDE 5 Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument We assumes no liability for the customer s failure to comply with these requirements Environmental Conditions This instrument is intended for indoor use Pollution degree 2 environments It is designed to operate at a maximum relative humidity of 95 and at altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range Before Applying Power Verify that all safety precautions are taken Note the instrument s external markings described under Safety Symbols Ground the Instrument This product is a Safety Class 1 instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cover must be connected to an electrical ground The instrument must be connected to the ac power mains through a grounded power cable with the ground wire f
18. he following information may help you to know how to control the output of electronic load through PC 7 1 Communication cable IT E131 RS232 Communication cable The DB9 interface connector on the rear panel of electronic load is TTL voltage level you can use the communication cable IT E131 to connect the DB9 interface connector of the electronic load and the RS 232 interface connector of computer for the communication IT E131 communication cable IT IT E131 ISOLATED 8 COMMUNICATION CABLE RS232J6 p ISOLATIOIG DL TTL 5 m e ES ml DE as0oee55e00002311 C mm IT E132 USB Communication cable The DB9 interface connector on the rear panel of electronic load is TTL voltage level you can use the communication cable IT E132 to connect the DB9 interface connector of the electronic load and the USB interface connector of computer for the communication 48 USER S GUIDE ITECH ELECTRONICS Chapter 7 Remote Operation Mode Your Power Test Solution IT E132 communication cable IT E134 GPIB Communication Cable The DB9 interface connector on the rear panel of electronic load is TTL voltage level you can use the communication cable IT E134 to connect the DB9 interface connector of the electronic load and then connect GPIB interface connector of IT E134 cable and computer with GPIB IEEE 4888 line for the communication IT E134 outer communication adapter COM in
19. he programmed value regardless of the input voltage CC mode can be set with front panel keys The CC mode parameters are discussed in the following paragraphs CURRENT LOAD SETTING CURRENT LOAD INPUT V VOLTAGE CONSTANTCURRENT MODE Constant Resistance CR Mode In this mode the module will sink a current linearly proportional to the input voltage in accordance with the programmed resistance The CR mode can be set at the front panel The CR mode parameters are described in the following paragraph LOAD SLOPE CURRENT RESISTANCE SETTING LOAD INPUT V VOLTAGE CONSTANT RESISTANCE MODE USER S GUIDE 17 ITECH ELECTRONICS Chapter 2 General Information vom Pose Test Soter Constant Voltage CV Mode In this mode the electronic load will attempt to sink enough current to control the source voltage to the programmed value The module acts as a shunt voltage regulator when operating in the CV mode The CV mode can be set at the front panel The CV mode parameters are described in the following paragraphs V VOLT LOAD INPUT SETTING VOLTAGE LOAD CURRENT CONSTANT VOLTAGE MODE Constant Power CW Mode In this mode the electronic loads will consumption power accordance with the programmed value regardless of the input voltage The CW mode can be set with front panel keys The CW mode parameters are discussed in the following paragraphs y POWER LOAD INPUT V2 gt SETTING VOLTAGE yg e gt
20. ilities e High accuracy and high resolution e Capable to work with constant current CC constant voltage CV constant resistance CR mode and constant power CW operation e Serial port DB9 RS232 port e Triggered input and measurement functions e Controlled by the keypad on the front panel USER S GUIDE 15 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution e Built in pulse generator for continuous pulsed and toggled transient mode operation e Over voltage over current over power and over temperature protection e Fan speed controlled by temperature e VFD display e Short circuit test e Battery testing function 2 6 Front Panel Controls The front panel has keyboard controls for setting the input voltage current and resistance The panel display provides digital readouts of a number of functions including the inputs Annunciators display the operating status of the electronic load 2 7 Remote Programming The electronic load can be remotely programmed from the computer via the isolated communication cable like IT E131 and so on 2 8 Operating Modes The four modes of operation are 1 Constant current CC 2 Constant voltage CV 3 Constant resistance CR 4 Constant power CW 16 USER S GUIDE ITECH ELECTRONICS Chapter 2 General Information Your Power Test Solution Constant Current CC Mode In this mode the electronic load will sink a current in accordance with t
21. imum current value is 12A and the resolution is 1mA it will become 120A when you press shitt V and you will get 2 decimal points xx xx compared to 3 decimal points before wheras if the fromer maximum current is 120A you can press Shift V to make it become 12A and the resolution will become as 1mA 46 USER S GUIDE a ITECH ELECTRONICS Your Power Test Solution Chapter 6 Specifications Chapter 6 Specifications Parameter 118511 118512 IT8512B IT8512C Voltage 0 to 120V 0 to 120V 0 to 500V 0 120V Input rating ara 1mA to 30A 1mA to 30A 1mA to 15A 1mA to 60A 150 W 300 W 300 W 300 W Regulation 0 3A 6A 2 0 1 0 1 FS 0 30A 15A 60A 2 0 1 0 1 FS CR Mode 0 1 100 1 0 3 FS 0 0010 0 0010 0 0010 Pep ET TT TT TE me 10 990 1 0 3 FS 0 010 0 010 0 010 CW Mode Regulation 0 100W 1 0 1 FS Input current 2FS 10 Input Voltage FS 100 3 1 0 1 FS 10 Input Voltage FS Current Measurement Voltage Measurement Power Measurement O 100W 100W 1 0 1 FS mW OES MW Wo Input current 2FS 10 10 Battery testing Input 0 1 120V Max measurement capacity 999AH function Resolution 10mA Timer range 1 60000sec Transition Mode Range of Frequency 0 1Hz 1kHz Frequency error rate lt 0 5 USER S GUIDE 47 ITECH ELECTRONICS Chapter 7 Remote Operation Mode OU Pener Teat Souto Chapter 7 Remote Operation Mode DB9 in the rear panel of electronic load could connect with RS 232 through on TTL connector T
22. irmly connected to an electrical ground safety ground at the power outlet Note Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of fumes or flammable gases KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers except as instructed in this Guide for installing or removing electronic load modules Component replacement and internal adjustments must be made only by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components 6 USER S GUIDE DO NOT SERVICE OR ADJUST ALONE Do not try to do some internal service or adjustment unless another person capable of rendering first aid resuscitation is present Safety Symbols gt ae Direct current Alternating current Both direct and alternating current Protective earth ground terminal Caution refer to accompanying documents Warning The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury
23. it must use the load testing periodic ensure the security of the battery Capability test Electronic load uses CC mode to do the capability test Make a program to set the voltage in off state The accumulator have too low voltage electronic load intermits test if system checks the accumulator which is near to one rating or in insecurity state In testing procedure you could see the accumulator voltage discharge current electronic load power and spare capability of accumulator If connecting with PC software discharge curve could be displayed in window This test can reflect the reliability and using time of accumulator So it s necessary to do the test before you change another new accumulator USER S GUIDE 27 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution Operation 1 Turn off the load connect with the tested battery V 2 Press tset VFD display CURRENT A Setting the discharge current of the battery then press Enter to confirm GY 3 Press snit Battery VFD display MIN Min voltage VOLT V Setting the voltage when turned off Press to start the capacity testing When the battery voltage is same as the voltage without power the load turns off During the testing use Wand A to change the Load Sink Current voltage actual discharge current the electronic load power and the released discharge capacity of the battery 4 Then press Battery exit the battery
24. nth group number And if there is not stored number VFD will show NO EEPROM DATA 5 3 Automatic Testing Function of Electronic Load You test various parameters of power supplies at different loads Now we take a kind of charger as an example to explain the usage of the automatic testing of the electronic load USER S GUIDE 43 Chapter 5 Front Panel Operation rer Ah od The test proceeding of R35 charger Mode Voltage V Current mA Power W Ripple counter 1st step 5 8 6 15 lt A input175VAC 2nd step 59 64 0 lt 1 2 input175VAC lt 50mVpp 1 Edit the Testing File 1 Press Shift Menu into menu VFD displays gt CONFIG 2 PressV to gt LIST SET 3 Press into submenu press Y to gt EDIT LIST FILE 4 Press and begin to edit the automatic testing file VFD shows MAX CURR 20 000A which means setting the maximum of voltage The maximum is bigger than 3A which means CC mode is in high range here the maximum is 3A Press and press Enter to confirm 5 VFD displays MAX VOLT 120 00V which means setting the maximum of voltage the maximum is bigger than 18V which means CV is in high range here the maximum is 18V Press to set MAX VOLT 18V press to confirm 6 VFD displays MAX POWER 200 00W which means setting the maximum of power here it is150W Press 0 to set MAX POWER 150W press Enter to confirm 7 VFD displays TEST COUNT 2 which means setting steps of testing 20 steps are permitted
25. oad 3 4 Rack Mounting The 118500 series electronic load can be mounted in a standard 19 inch rack Rack mount kits are available as Optional IT E151 The electronic load can be mounted in a standard 19 inch rack panel or enclosures using an Optional IT E151 rack mount kit A rack mount kit for joining two half rack units is also available by using Optional IT E151 USER S GUIDE 31 Chapter 3 Installation ITECH ELECTRONICS Your Power Test Solution Rack Installation a kO9SSSSJEN a hr PS ag TT Side elevation for Installation one electronic load in a standard 19 inch rack 32 USER S GUIDE ITECH ELECTRONICS Chapter 3 Installation Your Power Test Solution 0000 0dF en lololo m Gees fa ae m neet mm ORO TT Elevation for Installation two electronic loads in a standard 19 inch rack Caution Remove the carrying handle and the two plastic ears before rack mounting the instrument To remove the handle grasp the handle by sides and pull outwards and rotate it to a special position to let the arrow on the handle oppose the other arrow on the plastic ears then pull the handle outward After removing the handle you can use a screwdriver to remove the two plastic ears 3 5 Input Connections Power Cord Connect the power cord to the IEC 320 connector on the rear of the unit If the wrong power cord was shipped with your unit contact your nearest Agent to obtain the correct cord See f
26. observe the voltage and current we inputted and also can observe the step number of testing 3 Press Shift and begin to operate when the automatic testing is pause the current prolong time of one step is 25 5S press Shift also can make the testing continue USER S GUIDE 45 Chapter 5 Front Panel Operation ITECH ELECTRONICS Your Power Test Solution 1 When the automatic testing is finished the buzzer will hint by tweet buzzer VFD reads the result of testing If the testing passed VFD reads PASS or reads FAULT Press A V also to observe the numerical value and result of every step 5 Press sto back the automatic testing 4 Select the Resolution between Low Range and High Range 1 Press to enter into menu VFD displays gt CONFIG 2 Press into the submenu VFD displays gt INITIAL CONFIG 3 Press Vto make VFD display RANGE SELECT 4 Press to confirm and press W to choose ON 5 Press to confirm 6 Press sy to exit menu Then you can pressC Shift_ A to change the voltage range maximum voltage If the former maximum voltage value is 120V and the resoulution is 10mV it will become 18V when you press A and you will get 3 decimal points xx xxx compared to 2 decimal points before Wheras if the former maximum voltage is 18V you can press V to make it become 120V also the resolution will become as 10mV On the other hand you can press V to change the currnet range maximum current If the former max
27. ocation IT E174 A Contains installation checkout and front panel Programming information The Instrument calibration report oftware CD Rom Calibration Report User s Guide and Cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally Warning To prevent electric shock unplug unit before cleaning USER S GUIDE 29 Chapter 3 Installation ITECH ELECTRONICS Your Power Test Solution 3 2 Location The outline diagram in following figure gives the dimensions of your electronic load The electronic load must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation Installation Dimension 214 5mmW x 88 2mm H x 254 6mm D Terminal length 29 4mm Feet height 17 5mm 30 USER S GUIDE Outline Diagram Unit mm ITECH ELECTRONICS Chapter 3 Installation Your Power Test Solution Carrying Handle 3 3 Bench Operation A fan cools the electronic load by drawing air through the button and sides and exhausting it out the back Minimum clearances for bench operation are 25 mm along the sides Caution Do not block the fan exhaust at the rear of the L
28. ollowing figure for the part number and ordering options USER S GUIDE 33 Chapter 3 Installation ITECH ELECTRONICS Your Power Test Solution Warning SHOCK HAZARD the power cord provides a chassis ground through a third conductor Be certain that your power outlet is of the three conductor type with the correct pin connected to earth ground Note The detachable power cord may be used as an emergency disconnecting device Removing the power cord from the ac input connector will disconnect ac input power to the unit O a E China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 34 USER S GUIDE ITECH ELECTRONICS Chapter 4 Turn On Checkout Your Power Test Solution Chapter 4 Turn On Checkout 4 1 Introduction Successful tests in this chapter provide a high degree of confidence that the electronic load is operating properly 4 2 Checkout Procedure The test in this section checks for proper operation of the electronic load If you have not already done so connect the power cord to the unit and plug it in Procedure Display Explanation 1 Turn the unit on The electronic Load Fe ne nd an a During self test all segments are undergoes a self test VA when you First turn it on EEPROM damage or Lost data of last power off 2 Wait for 1s after turn Run well if no such display l EPROM ERROR l on electronic load system will go to the step 3 directly EEPROM Lost calibration data
29. press Enter set WIDTH A 3mS press set LEVER B 10A press Enter set WIDTH B 2mS press Enter to confirm Transition mode now is CONTINOUS press to confirm Press Tran to activate the transient mode Press Ctran_ again to stop the transient operation Press on off the input of load is powered on N oy E pa 10 Pulse Transient Operation In this mode generates a transient pulse of programmable width when pulsed transient operation is in effect For example When load receiving one trigger signal it will switch to 10A current value and taking 10mS to return the current value of 5A 40 USER S GUIDE ITECH ELECTRONICS Your Power Test Solution me Chapter 5 Front Panel Operation TWD TWD FEE lie TRIG TRIG Pulsed Transient Operation Action 1 Select the operation mode CC CV CR or CP and set a proper value press to turn off the load input 2 Press CShift_ set LEVER A 5A LEVER B 10A WIDTH B 10msS Transition mode now is CONTINOUS Press Y till gt PULSE Press set transient mode is PULSE Press EM to activate the transient mode Press Smm to start another pulse Press Shift rigger get more pulse Press C Shift again to stop the transient operation Press on off the input of load is powered on O N Sy OS 11 Toggled Transient Operation In this mode after transition operation start Load could change the input between the main level and the t
30. r 5 Front Panel Operation Your Power Test Solution Chapter 5 Front Panel Operation 5 1 Example 1 I set set up a constant current from 0 to Max current Set up a constant DC current input is the first main function of programmable DC electronic load T8500 series electronic load provides two methods to set up the constant DC current input by using the number keyboard and the rotary button Please see the following operation procedure Procedure Operation details VFD display Enter the password or jump the step 4 if your Step 2 l PASSWORD password for reentering Enter the original value which displayed in the LCD or enter a new value by using number keys or Rotary CURRENT A knob to adjust the voltage value Step 4 Press to confirm 0 00V 0 000A Setup the input current at 4 33A Method 1 To set up by using number keyboard Step1 Press button Step2 Press numeric button to enter the current value 4 33 Step3 Press button to confirm the current value Method 2 To set up by using Rotary SW If the key board is unlocked by password directly adjust the Rotary SW button and voltage will be continually changed from the previews value according the rotation At the beginning the cursor will be shown on the last number of the value which is indicated on the VFD you can move the cursor to the first number second number etc by using number buttons and then adjust the Rotary SW to change each number and let it st
31. r CV List mode the buzzer will sound if the input current exceeds the current limit and the display will show a flashing current value Over Power If the input power exceeds the power limit in the normal operation mode Load will work in the over power protection state VFD displays the information as CW When work in transition mode and list mode if the input power exceeds the power limit Buzzer is mooing VFD display the flashing current value and voltage value Reverse Voltage This feature protects the load module in case the input DC voltage lines are connected with wrong polarity if a reverse voltage condition is detected Buzzer is mooing VFD display as following REVERSE VOLTAGE Over Temperature If internal power components s temperature exceeds safe limits 80 C Over temperature protection is on work Load will turn off the input and Buzzer is mooing VFD display as following OVER HEAT 24 USER S GUIDE ITECH ELECTRONICS Chapter 2 General Information Your Power Test Solution 2 14 Remote Sense Function When work in CC CV CR and CP mode if load consumes biggish current it will cause one depressed voltage in the connection line between tested machine and terminals of Load In order to assure testing precision Load provides one remote testing terminals in the rear panel Users could test the output terminals voltage of tested machine through it Users should set the Load in REMOTE mode before using thi
32. ransient level when toggled transient operation is in effect For example When Load receives one trigger signal Load current will switch between 5A and 10A TRG Toggled Transient Operation USER S GUIDE 41 Chapter 5 Front Panel Operation ITECH ELECTRONICS Your Power Test Solution Action 1 Press GGnit_ Sen Setting LEVER A 5A LEVER B 10A transition mode is TOGGLED 2 Press Smm to activate the transient mode 3 Press Shit switch to the current value of 10A 4 Press Skft switch between 5A and 10A 5 Press Shift again to stop the transient operation 12 List Operation Users can use the front panel keypad or Power View 8500 PV8500 software to programming the list sequence Please refer to the software user s guide The following example will help you how to do the list operation in front panel Trigger 0 1 2 3 4 5 4 List count 1 List count 2 List sequence Action 1 Press the button of on off execute the input of Load I in OFF state 2 Press Shift Menu move cursor to the option of menu of CONFIG Press into the next step menu move cursor to TRIGGER SOURCE PC Enter_ and move cursor to IMMEDIATE lt DEF gt setting trigger source mode is panel IMMEDIATE mode 3 Press Enter to confirm 4 Press s to the previous menu move cursor to LIST SET 5 Press Enter into the next step menu move cursor to EDIT LIST FILE 6 Press Enter into the next
33. rigger the testing will continue Here the first step is 1 second press and then press Enter to confirm 15 Repeat 9 14 and set the other process step by step as follows A CONST CURRENT O0A SHORT OFF READ BACK V 5 9V 6 4V 1S B CONST VOLTAGE 5V SHORT OFF READ BACK A 0 205A 0 245A 1S C CONST VOLTAGE 3V SHORT OFF READ BACK A 0 205A 0 245A 1S D CONST VOLTAGE 2V SHORT OFF READ BACK A 0 205A 0 245A 1S E CONST CURRENT 0A SHORT ON READ BACK A 0A 0 245A 1S 16 VFD displays SHORT TEST FILE which requests saving the files edited to EEPROM automatically testing files and LIST files use a common memory area and the area can contain 8 groups of automatic testing files for next usage Here the testing file could be saved in the first group press and press Enter to confirm 17 When the edition of automatic testing file is finished press Enter two times to back the menu 2 Fast Recall the Test File 1 Press Shift to enter into menu VFD displays gt CONFIG 2 PressV and move the menu to gt LIST SET 3 Press to enter into submenu VFD displays gt MODE SET 4 PressV and move the menu to gt CALL TEST FILE 5 Press and recall the file edited 3 Automatic Testing After editing the automatic testing file the automatic testing could be carried out by the below steps 1 Press EM set to enter into automatic testing VFD displays the name of current file NAME TEST FILE 1 2 Press Enter to
34. rrrnnnnnnrnrnn 38 4 V set set up a constant voltage from 0 1V to Max voltage rtttrrtteteererrrrrrrrrrrnn 38 SES NE NE 39 FE GER NE ER EE 39 7 In On Off input setting teererrerreervenernenvenvenr ansees nes neve ve vennen annan nernernennonnennen 39 8 Transition Parameter Setting crt venv nevner ner venrnerrnnrnernennnen 39 9 Continuous Transient Operation rrrrmerriernernnrnnnn narran AO 10 Pulse Transient Operation oT ee IAS er ee re eee re 40 11 Toggled Transient Operation erre nen 41 12 List Operation 0 mmm 42 5 2 Fast Recall Function reada pianta da a a a 43 5 3 Automatic Testing Function of Electronic Load ttteerrrrerrreren rann ennnv renn rennrrennrrrnnrrrnnnnnn 43 1 Edit the Testing File rrrerrerrenrnervnnvanrnerne noon ans nnnnennno nor nnnvonnann never tanne nEn EE 44 2 Fast Recall the Test File Tec ee EEE Te ee eee eee er er reer rere ce cet er ee 45 3 Automatic Testing meme A5 4 Select the Resolution between Low Range and High Range seseeeseseeeeeeeeeeereee 46 Chapter 6 Specifications os 4 iy 4 Chapter 7 Remote Operation Mode o AQ kes une SE NR RR tilo ES EREEREER AEE 48 USER S GUIDE 3 Introduction IT E131 RS232 Communication cable IT E132 USB Communication cable IT E134 GPIB Communication Cable 7 2 Communication between electronic load and PC 4 USER S GUIDE ITECH ELECTRONICS Your Power Test Solution Warranty Information Certification We certify that this product met its published
35. s function 4 Pin trigger and remote sensing connectors Remote Sensing SENSE and SENSE are the remote sensing inputs By eliminating the effect of the inevitable voltage drop in the load leads remote sensing provides greater accuracy by allowing the load to regulate directly at the source s output terminals TRIG A TTL compatible input that responds to external edge trigger signal A trigger applied to this input can be used to change settings voltage current resistance etc toggle between settings in transient toggle mode or generate a pulse in transient pulse mode You must set the remote sense mode in the menu before using the remote sense function USER S GUIDE 25 Chapter 2 General Information ITECH ELECTRONICS Your Power Test Solution Action 1 Press key to go to the menu 2 VFD displays gt CONFIG press key to confirm 3 Press key to choose gt REMOTE SENSE press Enter key to confirm 4 Press V tochoose gt ON press Enter key to confirm And the remote sense function has been set Wiring diagram for remote sense Input port in front panel 2 15 Saving and Recalling Settings The electronic load has internal registers in which settings mode current voltage resistance transient level etc Users could use CShift_ Store and Recall to save and recall the relative data as following CC value CW value CR value CV value Transition current A value Transition current B
36. specifications at time of shipment from the factory Warranty This hardware product is warranted against defects in material and workmanship for a period of ONE year from date of delivery 118500 series electronic load for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period our company will either repair or replace products which prove to be defective Our company does not warranty that the operation for the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by our company Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to our place for warranty service Our company shall pay for return of products to Customer Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance Product number or serial number has been altered deleted removed or were unable to identify Damage from t
37. step menu move cursor to CURRENT LIST select CURRENT MODE 7 Press Enter move cursor to REPEAT Setup LIST is in cycle mode 8 Press Enter to confirm setup the list steps 5 9 Press Enter to confirm setup step 1 current 3A 42 USER S GUIDE ITECH ELECTRONICS Chapter 5 Front Panel Operation Your Power Test Solution Action 10 Press Enter to confirm setup step 1 width 6mS 11 Repeat 7 and 8 operation set current and width of one step OA 5mS 2A 4mS 6A 2mS 0A 5msS 12 Press to confirm Menu STORE LIST FILE 1 save file in group1 13 Move cursor to Mode Set press Enter to enter into the next step menu to set mode is lt LIST MODE gt 14 Press to confirm 15 Press s Press make Load in ON state Press Smit rigger make list operation run or stop 16 Stop the list operation mode Move cursor to LIST SET press Enter move cursor to Mode Set in option menu press enter into next step menu Select mode is lt FIXED MODE gt 17 Press Enter to confirm 5 2 Fast Recall Function You recall 10 groups numbers very conveniently which were stored before Action 1 Press shift 2 PressVWto CONFIG press into submenu press V to SHORTCURT RECALL 3 Press Enter select gt ON and press to confirm 4 Press Es two times and quit the menu 5 Press O and you can get the first group number Press you can get the second group number Press 0 you can get the te
38. terface of Electronic load GPIB line IT E134 ISOLATED Serial IEEE 488 Controller Note Forbidden to connect DB9 connector in electronic load directly with PC or other RS232 port USER S GUIDE 49 Chapter 7 Remote Operation Mode ITECH ELECTRONICS Your Power Test Solution 7 2 Communication between electronic load and PC Before using the remote operation mode please make sure that the baud rate and communication address in electronic load are the same as in the computer software otherwise the communication will fail you can change the baud rate and communication address from the front panel or from computer 1 Address the range is from 0 to 254 default setting is 0 2 Baud rate 4800 9600 19200 and 38400 are selectable default setting is 4800 3 Data bit 8 bit 4 Stop bit 1 5 Parity None Parity None Start Bit 8 Data Bits Stop Bit DB9 Interface Details DB9 in the rear panel of electronic load is TTL level signal it can be connecting with standard PC interface through the IT E131 isolated communication cable 50 USER S GUIDE ITECH Electronic Co Ltd China Tel 025 52415098 Fax 025 52415268 310 Ning Nan Da Dao NanJing City 210012 Jiangsu Province China Europe Tel 477 590101 Fax 477 572323 32 rue Edouard Martel 42100 St Etienne France USA Tel 714 9219095 Fax 714 9216422 22820 Savi Ranch Parkway Yorba Linda CA 92887 U S A South Korea Tel 285 20680 Fax
39. tronic load is OFF input off Trigger E Es waiting an initiate and trigger to occur Indicates that the electronic load is in CC Constant current CC mode Sense Remote sensing state Error CW Constant power CW mode In the communication state Indicates that the electronic load is in remote state RS 232 In the remote Resistance CR mode Rmt l l state only the active key is the Local key The input channel is enabled for Shift Indicates that the shift key has been i transient operation pressed List mode is initiated or running keyboard is locked by password The input is unregulated 1 4 Key Pad Store Recall S Tran Menu 7 Local Battery Short Trigger 10 USER S GUIDE ITECH ELECTRONICS Chapter 1 Quick Reference Your Power Test Solution O fm ooo Scrolling keys let you move through the commands in the presently Select function menu bring up the next command in the list Function menus are circular you can return to the starting position by continuous pressing the key Go back to the previous command in the list Function menus are circular you can return to the starting position by continuous pressing the key Confirmation key 1 5 Immediate Action Keys Shift Press to recall an existing electronic load state in non volatile Memory Shift Set the transition operation parameter Enter operation Menu When the load is controlled by PC press these keys to enable the front pre y
40. value Transition voltage A value Transition voltage B value Transition power A value Transition power B value Transition Resistance A value Transition Resistance B value 26 USER S GUIDE ITECH ELECTRONICS Chapter 2 General Information Your Power Test Solution Current A pulse width time Current B pulse width time Voltage A pulse width time Voltage B pulse width time Power A pulse width time Power B pulse width time Resistance A pulse width time Resistance B width time Transition current testing mode Transition voltage testing mode Transition power testing mode Transition resistance testing mode Max current value Max voltage value Max power value Action 1 Press GSet_ set a value of current or voltage press to confirm 2 Press Sa set a store code at random press Enter to confirm 3 Press CShift_ set the store code that you set before press Enter to confirm then you can get the number stored 2 16 Battery Testing Experiment proves the test with load is the best method to ensure the battery whether work well or not Only with the correct load testing the battery can be confirmed if it was being the expectant life curve location The electronic loads can be used to test any type of the battery nowadays As the accumulator is used by any sheltered equipment or the uninterrupted service system it is necessary to use the load testing Because the battery nearly is the lowest reliability component so
41. ving a triggering signal TRG Toggled Transient Operation 20 USER S GUIDE ITECH ELECTRONICS Vans Pover Test Sollien Chapter 2 General Information 2 10 List Operation List mode lets you generate complex sequences of input changes with rapid precise timing which may be synchronized with internal or external signals List operation can be changed by edit every step value and time in list operation The parameter of list operation include the group file name input step setting the max steps is 1000 steps time of one step 1mS 1h and setting value of one step In CC mode dwell time range is 1mS to 6S which also have an associated value Note that lists data can only be saved in total 1000 steps memory of 4 situations GROUP Total 1000 steps 1000 steps 500 steps 500 steps 250 steps 250 steps 250 steps 250 steps 8 1120 steps 120 steps 120 steps 120 steps 120 steps 120steps 120 steps 120 steps When receiving one trigger signal it will start the list operation until receiving another trigger signal or finish the List operation Trigger 0 1 2 34 5 List count 1 List count 2 gt List sequence 2 11 Triggered Operation The electronic load has various triggering modes to allow synchronization with other test equipment or events Such as Keypad triggering mode Press to trigger the electronic load TTL triggering mode Send a high pulse with a constant tim
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