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1. 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 34 IT E131 communication 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 interface of GPIB line Electronic load IT E134 ISOLATED Serial IEEE 488 Controller 35 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 36
2. 12 13 14 15 16 17 Repeat 7 and 8 operation set current and width of one step 0A 5mS 2A 4mS 6A 2mS 0A 5mS Press to confirm Menu STORE LIST FILE 1 save file in group1 Move cursor to Mode Set press to enter into the next step menu to set mode is LIST MODE gt Press to confirm Press 8 Press On Off make Load in ON state Press C Shift Trigger make list operation run or stop Stop the list operation mode Move cursor to LIST SET press Enter move cursor to Mode Set in option menu press CEnter enter into next step menu Select mode is FIXED MODE gt Press to confirm Fast Recall Function You recall 10 groups numbers very conveniently which were stored before Action 1 2 Press Shift Menu Press V to CONFIG press Enter into submenu press Y to SHORTCURT RECALL PressCEnter select gt ON and press Enter to confirm Press 3 two times and quit the menu Pres ana you can get the first group number Pres P you can get the second group number Pres O you can get the tenth group number And if there is not stored number VFD will show NO EEPROM DATA 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 The test proceeding of R35 charger process Test Method Mode Vol
3. In Case of Trouble i rere FR HR RR RR RR RR PE FER Re Eee dei de ed e 24 FRONT PANEL OPERATION t o ro re t cte te eee cup eas bea Der a faf lad tarta iE UE 25 EXAMPLEoS tri a a UU DL DELE E D Eu d el nll es hs 25 I set set up a constant current from O to Max current oococconcccccccnocccnconancncconnnnccnnnnnnconcnnnn cnn 25 P set set up a constant power from 0 to Max power seemme 26 R set set up a constant resistance from 0 10 to 40000 26 V set set up a constant voltage from 0 1V to Max voltage 26 ShifE 3 Store ave eee cia vices ES A Es 26 Shift 4 Recall rr rre RR Rr RR ROTER ERE ER EA UE BE ONE OD I COE UR 27 Ii nO input sellus torno ione inde eode inti peaa aaa DIM IRE 27 Transition Parameter Seld tet teta a nu n MI I M D ERE LAE 27 Gontinuotis Transient Opera tat kk Lali at 27 Pulse Transient Operation curas 28 Toggled Transient Operation axe eta ta ee a ae US 28 Ae A ar ce O Wea te ene eg aad 29 FAST RECALL FUNCTION css 30 AUTOMATIC TESTING FUNCTION OF ELECTRONIC LOAD cceeceeeceeeeeeeeeeeeeeeeeeeeaeeseeeseaeeeaeesneeeeaeeeaeeeas 30 Edit ne Testing File acid 31 FastRecall the Test Flu ee ete de ethos 32 Automatic Testing iii dd aa 32 Select the Resolution between Low Range and High Range sssee 32 SPECIBICATONS deia a M INTE 33 REMOTE OPERATION MOD Es att td tt ds e de cles 34 1 COMMUNICATION GABLE ista 34 2 COMMUNICATION BETWEEN ELECTRONIC LOAD AND PC ss
4. 19200 38400 COMM PARITY SET Command parity setting NONE lt DEFAULT gt EVEN ODD ADDRESS SET Setting communication Flow mode KEY LOCK SET Setting keypad password EXIT SYSTTEM SET MAX CURRENT SET Setup the maximum current MAX POWER SET Setup the maximum power MAX VOLTAGE SET Setup the maximum voltage VOLTAGE ONSET VOLTAGE OFFSET EXIT LIST SET MODE SET Setting operation mode FIXED MODE Fixed mode LIST MODE Choosing List mode CALL LIST FILE Recall list operation file EDIT LIST FILE Edit list operation file LIST STORE MODE Users can choose 4 kind of memory space to save the list file 8X120 STEPS Total 8 files and each file have120 list steps 4X 250 STEPS Total 4 files and each file have250 list steps 2X500 STEPS Total 2 files and each file have500 list steps 1X 1000 STEPS Total 1 file and each file have1000 list steps EXIT LOAD ON TIMER TIMER STATE Setting LOAD ON timer state ON 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 OFF lt DEFAULT gt TIMER SET Setting time of LOAD ON timer EXIT EXIT 10 General Information Document Orie
5. 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 11 Accessories Power cord User s manual Software CD Rom if you buy the communication cable you ll get it for free Calibration testing report 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 IT8500 series electronic load could work in constant current CC mode constant voltage CV mode or constant resistance CR mode and constant power CW mode Features and Capabilities e High accuracy and high resolution Capable to work with constant current CC constant voltage CV constant resistance CR mode and constant power CW operation Serial port interface DB9 RS232 port Triggered input and measurement functions e Within the controlled keypad in the front panel Built in pulse generator for continuous pulsed and toggled transient mode operation Over voltage over current overpower and over temperature protection Electronic load calibrate by Software
6. 4C Battery exit the battery capacity testing mode Voy Battery Voltage Min voltage A Load Sink Current 20 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 Voff Yon Action for set Von Voff value 1 Press Shift D CMenu into menu 2 VFD displays gt CONFIG press V key to choose SYSTEM SET press Enter to confirm 3 VFD displays MAX CURRENT SET press V key to choose VOLTAGE ON SET press CEnte 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 sVOLTAGE OFF SET press Entento confirm 6 VFD displays gt VOLT OFF 0 00V press numeric keys to set Voff value OV to max voltage value press Enero confirm Installation 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 Item Part Number Description Power Cord IT E171 Users will get one of the power IT
7. E d Confirmation key Immediate Action Keys CShift DCA D Switch to A setting value CShift C B Switch to B setting value CD Cia Start Stop transition operation SDA Press to store an existing electronic load state in non volatile Memory SMD Press to recall an existing electronic load state in non volatile Memory C Shift S Tran Set the transition operation parameter C Shift Menu Enter operation Menu Shift Local T is controlled by PC press these keys to enable the front C Shift gt Battery Battery discharge electronic operation C Shift_ Short Turn on or turn off short circuit Test C Shift Trigger Causes a trigger to occur Change the trigger source is IMMIDIATE 8 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 Enter rey you could get the selected menu function Press Shack to the previous menu selection page MENU CONFIG INITIAL CONFIG Return to the factory default setup value POWER ON RECALL Setting Power on state of Load ON When users turn on the electronic load the electronic load setup value will keep the state of last time when users turn off the electronic load OFF lt DEFAULT gt Disable this function INPUT RECALL S
8. E172 cords appropriate for your location IT E173 21 IT E174 User s Guide Contains installation checkout and front panel information and Software CD Rom Programming information Calibration Report The Instrument calibration report Cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally To prevent electric shock unplug unit before cleaning 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 448mmW x185mmHx539mmD 179 52 70 22 Outline Diagram Unit mm A Bench Operation A fan cools the electronic load by drawing air through the button and sides and exhaugting it out the back Minimum clearances for bench operation are 25 mm along the sides Do not block the fan exhaust at the rear of the Load 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 following figure for the part number and ordering options SHOCK HAZARD the power cord provides a chassis ground through a third conductor Be certain that your power ou
9. value which displayed in the LCD or enter a new Step 3 Jod CURRENT A value by using number keys or Rotary knob to adjust the voltage value Step 4 Press to confirm 0 00V 0 000A Setup the input current at 4 334 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 set 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 stay at A Please see the following description Then press l set to confirm the value 0 00A 0 00V 0 0W 4 33A Procedure 25 Step1 Press Eset button Step2 Adjust the Rotary knob to change the value the operation is as the same as item 1 Step5 PressCEntet button to confirm the current value P set set up a constant power from 0 to Max power IT8500 series electronic load can be set up for a constant power Constant power setup procedure is as following Procedure Operation details VFD display Step 1 Press Pse POWE
10. R 0 0W Enter a new value by using numeric keys or Step 2 ee PLA POWER W Rotary knob to adjust the voltage value Step 3 PressCEnte to confirm 0 000W P 000W R set set up a constant resistance from 0 10 to 40000 1T8500 series electronic load can be setup for a constant resistance Constant resistance setup procedure is as following Procedure Operation details VFD display Step 1 Press B set RESISTANCE 0 0R Step 2 enter a new value by using numeric keys or RESISTANCE R Rotary knob to adjust the resistance value Step 3 Press CEnter to confirm 0 000W R 0000R V set set up a constant voltage from 0 1V to Max voltage IT8500 series electronic load can be setup for a constant voltage Constant voltage setup procedure is as following Procedure Operation details VFD display Step 1 Press VOLTAGE 1 500V enter a new value by using numeric keys or Step 2 VOLTAGE V P Rotary knob to adjust the resistance value 9 a Step 3 Press ED to confirm 0 000W V 3 000V Shift Store Procedure Operation details VFD display Step 1 Press C Shift ana Store STORE 1 Step 2 Press enter to confirm Store the relative data 26 Shift Recall Procedure Operation details VFD display Step 1 Press Shift ang Recall RECALL 1 Step 2 Press Ente to confirm Recall the saving data In On Off input set
11. 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 31 contain 8 groups of automatic testing files for next usage Here the testing file could be saved in the first group pres P and press CEnter to confirm 17 When the edition of automatic testing file is finished pressC Enter two times to back the menu Fast Recall the Test File 1 Press C Shift gt Menu Dto enter into menu VFD displays CONFIG 2 Press Y and move the menu to LIST SET 3 Press Entento enter into submenu VFD displays gt MODE SET 4 Press Y and move the menu to gt CALL TEST FILE 5 Press Ente and recall the file edited Automatic Testing After editing the automatic testing file the automatic testing could be carried out by the below steps 1 PressCShift ED o enter into automatic testing VFD displays the name of current file NAME TEST FILE1 2 Press Entento observe the voltage and current we inputted and also can observe the step number of testing 3 Press Shift CTriggeD and begin to operate when the automatic testing is pause the current prolong time of one step is 25 5S press Shift TriggeD also can make the testing continue 4 When the automatic testing is finished the buzzer will hint by tweet buzzer VFD re
12. USER S GUIDE Programmable DC Electronic Load Models IT8516S Copyright 2004 All Rights Reserved Ver1 1 APR 2006 IT8500 401 QUICK REFERENCE cocinas 6 RE ERONT PANEL 75 s tt stat teta o ae 6 THE REAR PANED aci SR Se SE NS ES a risc dra bra bad 7 FRONT PANEIANNUNCIATORS tcs tote Cer t Er eie E e eee Erben fer ie ead Eds 7 REV PAD soso e e e tallat 8 IMMEDIATE ACTION IKEYS tetes ta ee oi 8 MENU OPERATION ed dedo s 9 GENERAL INFORMATION 2 2 tt es eraat len 11 DOCUMENT ORIENTATION ccesccceessscceecssseececesseeeecesaeeeeceseeeeesseseeeecesaeeeeseseeeeesecesaeeesesseeeesessateeess 11 GETING STARTED MAP cz ds eds Ttt etate etes Salcedo eate tdi feda dedere eeu deudor A 11 OPTIONS AND ACCESSORIES aaa A E EUR A E E PE EE UC ERR da Ege Pv ae AA 11 OPI toute SECS ORIG Cod M D IE 11 AGCCeSSOTIOS i e e eee ia 12 DESCRIPTION MT E tem al le MA P S 12 FEATURES AND GAPABIEITIES ish sok a el ek ak eee re Se keel Merve dee 12 FRONT PANEL CONTROLS sament dedicat dieta A 12 REMOTE PROGRAMMING ccccsccccsssccsssccesseecesseeessseecsaseccsseecssseecsaseccsseecssseccsaeecscaaseceseeeseeeesstesenaes 12 OPERATING MODES cccssecceccssssceecesseceusessanseesssanseesessneeusessaesensesansensessesausesessanseseusansensesseseusessanees 12 Constant Current CCC Mode ui di 13 Constant Resistance CR Mode sse eene enne enne enne nnne 13 Constant Voltage CV Mode ssssssssssssssseseeeenneennn ener e
13. 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 Quick Reference The Front Panel 16 character display shows voltage and current measurements Rotary knob Power switch ON OFF Input terminals E ENEE Entry keys numeric keys Enter values Increasing or decreasing the setup values Menu commands El Reypad Enable disable input Setup the current resistance and voltage modes Set and reset protection functions Scroll through front panel ON OFF Input terminals si e The Rear Panel 3 Pin IEC320 ac input connector Power code requires ground conductor Power switch 110V 220V Fuse 9 Pin COM port interface connector 4 Pin Trigger and Remote sensing connectors Fan cool a a 9 e v 2 Front Panel Annunciators Indicates that the electronic load is waiting OFF input off Trigger P 99 an initiate and trigger to occur Indicates that the electronic load is in CC Constant current CC mode Sense Remote sensing state CV Constant voltage CV mode Error A errors have occurred CW Constant power CW mode Link In the communication state Indicates that the electronic load is in CR Resistance CR mode Rmt remote s
14. ads the result of testing If the testing passed VFD reads PASS or reads FAULT Press amp Y also to observe the numerical value and result of every step 5 Presso back the automatic testing Select the Resolution between Low Range and High Range You can adjust the resolution by selecting the low and high range The first step you should do is to enable this function in the menu Action 1 Press Shift CMenu 4 enter into menu VFD displays gt CONFIG 2 Press Enter into the submenu VFD displays gt INITIAL CONFIG 3 Press V to make VFD display RANGE SELECT 4 Press Entento confirm and press Y to choose ON 5 Press Enter to confirm 6 Press to exit menu Then you can press CShift 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 C Shift 4 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 Shift y to make it become 120V also the resolution will become as 10mV 32 On the other hand you can press C Shift y to change the currnet range maximum current If the former maximum current value is 12A and the resolution is 1mA it will become 120A when you press CShift 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 CShift y to make i
15. age resistance transient level etc Users could use C Shift CStore and C Shift 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 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 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 Eset set a value of current or voltage pressCEnter to confirm 2 Press Shift CStore set a store code at random press Enter to confirm 3 Press C Shift Recall set the store code that you set before press Enero confirm then you can get the number stored 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 shelter
16. ain to stop the transient operation 6 Press On Off the input of load is powered on 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 TWD i TWD 10ms gt 10ms j 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 C Shift GTran set EVER A 5A LEVER B 10A WIDTH B 10mS Transition mode now is CONTINOUS Press V till gt PULSE PressCEnter set transient mode is PULSE Press Shift C Tran gt to activate the transient mode i Press Shift Trigger to start another pulse Press C Shift Triggen get more pulse Press Shift ran again to stop the transient operation i PressON O the input of load is powered on o NOOA C Toggled Transient Operation In this mode after transition operation start Load could change the input between the main level and the transient level when toggled transient operation is in effect For example When Load receives one trigger signal Load current will switch between 5A and 10A 28 TRG Toggled Transient Operation Action 1 PressCShift GTran setting LEVER A 5A LEVER B 10A transition mode is PULSE 2 Press C S
17. ce Assistance The above statements apply only to the standard product warranty Warranty options product maintenance agreements and customer assistance agreements are also available 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 firmly connected to an electrical ground safety ground at the power outlet Note Any interruption of
18. e Display the actual power value 6 Press AV 0 000W 1 0 000A Pa E and setting value 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 Checkthe 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 24 Model Fuse specification Fuse specification 110VAC 220VAC IT8516S T2 5A 250V T1 25A 250V Front Panel Operation Example 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 IT8500 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 Step1 Press ESE CURRENT 0 000A Enter the password or jump the step 4 Step 2 p nba P PASSWORD if your password for reentering Enter the original
19. e Fan speed control by temperature e VFD display Short circuit test e Battery testing function 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 Remote Programming The electronic load may be remotely programmed from the computer via the IT E131 isolated communication cable Operating Modes The four modes of operation are 1 Constant current CC 2 Constant voltage CV 3 Constant resistance CR 4 Constant power CW 12 Constant Current CC gt Mode In this mode the electronic load will sink a current in accordance with the 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 l CURRENT LOAD CURRENT SETNING gt 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 Constant Voltage CV Mode In this mode the el
20. ectronic 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 13 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 POWER LOAD INPUT V2 SETTING VOLTAGE y3 CURRENT CONSTANT POWER MODE 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 o
21. ed equipment or the uninterrupted service system it is 19 necessary to use the load testing Because the battery nearly is the lowest reliability component so 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 Operation 1 Turn off the load connect with the tested battery 2 Press Eset VFD display CURRENT A Setting the discharge current of the battery then press CEnter to confirm 3 Press C Shit gt C Battery VFD display MIN 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 voltage actual discharge current the electronic load power and the released discharge capacity of the battery 4 Then press Shift
22. ene nennen nennt nn 13 Constant Power CW Mode sssssssssssssssseseeeeeeenneeenner eene enne nn nennen nnne nnne nnne nn 14 TRANSIENT OPERATION set ettet a mamar 14 Continuous a 14 PUIS 5 A eI itenim 14 Ti oger Mode 5 A ac a t A REED 15 EISTOPERATION mrina tro evt euo eed eet ted A i 15 TRIGGERED OPERATION mizi eet oet EE ore ete 16 NUCA 16 ShortzOh Ofs uisa edo ae edo eel AAA ATAA o De les 16 PO A O MER DNE E ea acta is 16 Operation RIN EE ES EE E RE is 17 PROTECTION FEATURES cssscccsssccesseecssseecessecesseecsuseecasecesseacsuseccsaeecsseeecsasecesaaeesesaeecseeecsasecesseees 17 REMOTE SENSE gener td iii 18 SAVING AND RECALLING SETTINGS cccscccssscccssseecsseccsseeccseecesseecssseccsseecseseecasecesseecsseeecssaeesessneeens 19 BATTERY TESTING cui 19 VON VOFF OPERATION MEME 21 INSTALLATION cccccccccccssscccsscccsseeccsseeccseecesseecsasecesseecesseecseeeccsatecsceaeacenseecsaeecesseeceseeceseeeesaeesenseees 21 INSPECTION curia alo eter a lid ltd 21 DAMA rita ebrio st le e e De aaa tata 21 E A E 21 E si ee t t M t d LEE 22 LOCATION S 22 lnstallation ce EE A ER EL 22 BENCH OPERATION da Tere UI uA CE T ede 23 INPUT CONNECTIONS a ete e e be e RE 23 Power COrd c agosode code ad 23 TURNONGHECGROUT ee taii fui Pace tens a ee ae i site Pa he rete SM nieda iada ia nipin dadada ada MAL AS 24 INTRODUCTION ccn acad tento doses ien eo sete cano uc ese ete ote tette testa 24 CHECROUT PROCEDURE cc ii 24
23. etup of the electronic load input state in Power on ON When users turn on the electronic load the electronic load input state will keep as the last time when users turn off the electronic load OFF lt DEFAULT gt When users turn on the electronic load the electronic load input state will keep the off KEY SOUND SET Keypad sound setting ON lt DEFAULT gt Enable key sound OFF Disable key sound KNOB LOCK SET Setup rotary knob lock state ON Lock Rotary knob OFF lt DEFAULT gt Unlock Rotary knob SHORT CUT RECALL Quickly recall the data stored before ON OFF gt RANG SELECT Change the measure precision of voltage and current ON OFF gt REMOTE SENSE Setup voltage measurement Mode ON The electronic load will measure input voltage from the remote sense connector OFF lt DEFAULT gt The electronic load will measure input voltage from the front panel connector ADC UPDATE RATE HIGH LOW lt DEFAULT gt TRIGGER SOURCE Choosing the trigger signals source IMMEDIATE lt DEF gt Trigger signals from Shift TrigdeD key EXTERNAL Trigger signals from the TRIG connector in the rear panel BUS Communication command trigger mode CONNECT MODE MAXTIDLEXING SEPARATE lt DEF gt BAUDRATE SET Setting baud rate 9600 lt DEFAULT gt 9600
24. hift C Tran Dto activate the transient mode 3 Press Shift TriggeD switch to the current value of 10A 4 Press Shift Trigger switch between 5A and 10A 5 Press Shift CTran again to stop the transient operation 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 Listcount 2 List sequence Action 1 Press the button of On Off execute the input of Load in OFF state 2 PressC Shift 4 Menu move cursor to the option of menu of CONFIG Press Ente into the next step menu move cursor to TRIGGER SOURCE Press CEnter and move cursor to IMMEDIATE lt DEFs setting trigger source mode is panel IMMEDIATE mode 3 Press CEnter to confirm 4 Press E to the previous menu move cursor to LIST SET 5 Press CEnte into the next step menu move cursor to EDIT LIST FILE 6 Press Ete into the next step menu move cursor to CURRENT LIST select CURRENT MODE 7 PressCEnten move cursor to REPEAT Setup LIST is in cycle mode 8 Press to confirm setup the list steps 5 9 Press to confirm setup step 1 current 3A 10 Press to confirm setup step 1 width 6mS 29 11
25. ltage 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 the function 4 Pin trigger and remote sensing connectors IN amp 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 Action 1 Press Shift Menu key into the menu 2 VFD displays gt CONFIG press Ente key to confirm 3 Press V key to choose gt REMOTE SENSE press Ente key to confirm 18 4 PressA V to choose gt ON press Enter key to confirm And the remote sense function has been set Wiring diagram for remote sense nput port in front pane Saving and Recalling Settings The electronic load has internal registers in which settings mode current volt
26. lue 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 or 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 17 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 Remote Sense Function When work in CC CV CR and CP mode if load consumes biggish current it will cause one depressed vo
27. ntation This manual describes the operation of the IT Model 8500 electronic loads Unless otherwise noted all units will be referred to by the description electronic load throughout this User s 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 Getting Started Map Task Where to find information Checking out the unit User s Guide Verifying proper operation Using the front panel Calibrating the unit Using the front panel User s Guide Front panel keys Front panel examples Using the programming interface User s Guide RS 232 interface Remote operation mode User s Guide Protocol information Controller Program and Software driver CD ROM Power View PV8500 software If you ve purchased the communication Calibration PC8500 software cable you will get it for free Active driver PD8500 OCX software 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
28. peration mode Continuous Generates a repetitive pulse stream the toggles between two load levels and change the state between value A and value B Sl gt 2 0ms 3 0ms Continuous Transient Operation Pulse Switch to value B as receiving one trigger signal taking the pulse time TWD of value B Load will return to Value A 14 TWD TD EM gt le Oms TRIG TRIG Pulsed Transient Operation Trigger Mode Switching the state between value A and value B once receiving a triggering signal TRG Toggled Transient Operation 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 Jand 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 1 1000 steps 2 500 steps 500 steps 4 250 steps 250 steps 250 steps 250 steps 8 120 steps 120 steps 120 steps 120 steps 120 steps 120steps 120 steps 1120 steps When receiving one trigger signal it will start the list operation un
29. rrent 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 The Input On Off command supersedes the mode commands and Short Test On Off command 16 Operation Range Work in the range of Rated Current Rated voltage and Rated Power The figure is as following pe 9 e o Q lt o 0 e Rated power A ADVLIOA LNdNI Input current Rated current Operation mode change state Rated voltagd C Software Power Limit Software Current Limit A 39VL1IOA LNdNI Input current Rated current 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 Over Current When operating in CR CC or CP mode the load current will be limited by a current limit va
30. ssssseeeeenenen enne 35 Warranty Information Certification We certify that this product met its published 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 IT8500 series electronic load for use with a hardware product and when properly installed on that hardware product are warranted nat 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 maintenan
31. t become 12A and the resolution will become as 1mA Specifications IT8516S Output Rating 0 40 C Current 1mA 300A 3000 Range Load Regulation 0 18V 0 05 0 02 FS 1mV 0 120V 0 05 0 025 FS 10mV 0 30A 0 1 0 1 FS 1mA 0 300A 0 2 0 15 FS 10mA CV Mode 0 18V CC Mode 0 30A 0 1 0 1 FS 1mA Regulation 0 300A 0 2 0 15 FS 10mA 0 1 100 1 0 3 FS 0 0010 CR Mode 10 990 1 0 3 FS 0 010 Regulation 100 9990 1 0 3 FS 0 10 CW Mode 0 100w Regulation 100 3000W Current 0 30A 0 1 0 1 FS 1mA Power 0 100W 1 0 1 FS 1mW Measurement 100 3000W 1 0 1 FS 100mW Battery Oo N o lt Max measurement capacity 999AH 5 me c 33 Testing function Resolution 10mA Timer range 1 60000sec Transition Mode Range of Frequency 0 1Hz 1kHz Frequency error rate lt 0 5 Remote Operation Mode DB9 in the rear panel of electronic load could connect with RS 232 through on TTL connector The following information may help you to know how to control the output of electronic load through PC 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
32. tage V Current mA Power W Ripple counter 1 step CC 5 8 6 15 210 lt 4 input175VAC 2 step None 5 9 6 4 0 lt 1 2 input175VAC 3 step eC 5 205 245 4 step CV 3 205 245 lt 50mVpp 5 step cv 2 205 245 6 step Short circuit 0 lt 245 30 Edit the Testing File On A 9 PressC Shift CMenu into menu VFD displays gt CONFIG Press V to LIST SET Press CEnter into submenu press Y to gt EDIT LIST FILE PressCEnter 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 NY and press CEnter to confirm VFD displays MAX VOLT 120 00V vvhich means setting the maximum of voltage the maximum is bigger than 18V which means CV is in high range here the maximum is 18V Pres DO to set MAX VOLT 18V press Entento confirm VFD displays MAX POWER 200 00W which means setting the maximum of power here it is150W Press RO to set MAX POWER 150W press to confirm VFD displays TEST COUNT 2 which means setting steps of testing 20 steps are permitted at most here they are 6 steps Press to set TEST COUNT 6 press to confirm Setting the mode of current procedure press A Vto 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 En
33. tate RS 232 In the remote state only the active key is the Local key The input channel is enabled for Indicates that the shift key has been Tran Shift transient operation pressed List List mode is initiated or running Lock keyboard is locked by password Unreg The input is unregulated Key Pad POWER De Q9 8 699 8 0 Store Recall S Tran Menu 9 C I set V set P set R set Shift nputon of A Local Battery Short Trigger A 0 through 9 are used for entering numeric values Decimal point DOS The escape key It may used to exit any working state Choosing CC mode and setup the input current of regulation current mode Choosing CV mode and setup the input voltage of regulation voltage mode Choosing CW mode and setup the input watt of regulation power mode Choosing CR mode and setup the input resistor of regulation resistance mode Shift keys Power ON OFF A Scrolling keys let you move through the commands in the presently Select function menu bring up the next command in the list Function menus arg 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 Enter
34. tento confirm VFD shows SET 1 20 000A which means setting the current procedure Here the first sis 0 21A e 0 0 0 0 then press CEnter 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 Enter io confirm 11 Select the test number of this step press A V to choose sREADB ACR V PRESSCEnter to confirm 12 VFD displays MIN 1 120 00V which means setting the lower limit Here the first step is 5 8V pro 0 0 0 pressCEhter to confirm 13 VFD displays MAX 1 120 00V which requests setting the upper limit Here the first step is 6 15V oes 0 0 0 press Entento 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 yTriggen the testing will continue Here the first step is 1 second press Band then pressC Enter io confirm 15 Repeat 9 14 and set the other process step by step as follows A CONST CURRENT OA 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
35. 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 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 Direct current Alternating current Both direct and alternating current Protective earth ground terminal DO Al Caution refer to accompanying documents The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes
36. til receiving another trigger signal or finish the List operation Trigger d 0 1i 2 3i4 5 M Listcountz1 Listcount 2 List sequence 15 Triggered Operation The electronic load has various triggering modes to allow synchronization with other test equipment or events Such as Keypad triggering mode Press C Shift Trigger to trigger the electronic load TTL triggering mode Send a high pulse with a constant time 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 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 C Shift D CShort 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 In CC CW and CR mode the max short circuit current value is 1 2 times of the current range In CV mode short circuit operation is same as the operation of setting CV to OV Turning the Short Test on in CV mode may cause the load to draw so much cu
37. ting UseOn O to change the state of electronic load Switch on to off state by press On Off On Off Transition Parameter Setting Users could press Shift S Tran to set the transition parameter LEVEL A 0 000A Setup value A WIDTH A 0 5MS Setup time width of value A LEVEL B 0 000A Setup value B WIDTH B 0 5MS Setup time width of value B gt CONTINUOUS Choose one of the three gt PULSE transition modes gt TOGGLED Finish transition setting 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 On Off to turn off the load input 27 2 Press C Shift_ S Tran set LEVEL A 5A press CEnter set WIDTH A 3mS press Enter set LEVER B 10A press Ente set WIDTH B 2mS pressCEnter ig confirm 3 Transition mode now is CONTINOUS press CEnterDio confirm 4 Press C Tran to activate the transient mode 5 Press Shift Gian ag
38. tlet is of the three conductor type with the correct pin connected to earth ground 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 OOR China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 23 Turn On Checkout Introduction Successful tests in this chapter provide a high degree of confidence that the electronic load is operating properly 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 During self test all segments are The electronic Load briefly lit undergoes a self test when you First turn it on EEPROM damage or Lost data of last power off 2 Wait for 1s after turn on i EPROM ERROR Run vvell if no such display electronic load system will go to the step 3 directly EEPROM Lost calibration data 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 Display the information of the 4 Press Shift button and SN XXXEXXX XXX product Type series number A Vkeys VER xxx version of software Display the actual input voltage 0 000V 0 000A 5 Press button and current valu

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