IT8500 Electronic Load USER`S GUIDE
Contents
1. 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 ar 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 g lt Enter Confirmation key Immediate Action Keys Shift PAC A Switch to A setting value CShift C B D Switch to B setting value Shift Start Stop transition operation CShift CTran CShift Press to store an existing electronic load state in non volatile Memory Shift Press to recall an existing electronic load state in non volatile Memory C Shift_ CS Tran Set the transition operation parameter C Shift Y4CMenu Enter operation Menu C Shift 4 LocaD ace is controlled by PC press these keys to enabl2. c cccceceeeceeceeeeeeeeeeeeeececneeaeeeeeeeececeesaaeeeeeeeeseseeccaeeseeeeeeeseeneneaees 25 Toggled Transient Operation sinirinin aa a aa aa a anaa eia a AA aa Eiaeaen iS 26 LISTO POMAR A Wa ih AA Ed a 26 FAST RECALL FUNCTION sisas at edad co 27 AUTOMATIC TESTING FUNCTION OF ELECTRONIC LOAD ooococccccccccconconcncnnnncncnnnnnnnnncnnnnonnnnannnnnnnnnnininnas 27 Edith Testing ler a elie aed OMS te oi SR 28 Fast Recalltne Test File cio ii el nia 29 Automatic Test iii ead ite ala 29 Select the Resolution between Low Range and High Rang ccccceceseeeeecceeeeeeeeteeeeeees 29 SPECIFICATION Socialista 30 REMOTE ORERATION MODE cita cc Delta dees 31 1 COMMUNICATION CABLE occ ccctct siatsnegcqeenatsctseestnennend dhsesetneeennhhcadaebarasiaceeneneseswaiatecteasavehnacides aaaeae 31 2 COMMUNICATION BETWEEN ELECTRONIC LOAD AND PC c cccceceeeeeeeeeeeaeeeeeeeeteeneaeaeeeseeeeteneneas 32 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 not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of deli
3. mk kkk Step Rotary knob to adjust the resistance value VOLTAGES IAN Step 3 PressCEnter to confirm 0 000W V 3 000V Shift Store Procedure Operation details VFD display Step 1 PressC Shift ana Store STORE 1 Step 2 Press CEnter to confirm Store the relative data Shift Recall Procedure Operation details VFD display Step 1 Press Shift and Recall RECALL 1 Step 2 Press CEnter to confirm Recall the saving data In On Off input setting Use Onl to change the state of electronic load Switch on to off state by press On Off 24 Transition Testing Operation Users could switch between the two different current and voltage in the transition mode it could test the transition specialty of power supply Users could use front panel or communication interface CTRAN ON AND TRAN OFF to make it work or not please setting parameters before transition operation Include Transition setting value Constant pulse width setting and Transition Pulse width setting and Transition testing mode The mix pulse width is 500uS The Max pulse width is 6S Transition Operation only could work in CC and CV mode Users can choose one of the three operation modes Continuous Pulse and Toggling mode Transition Parameter Setting Users could press Shift G 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
4. 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_ TriggeD 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 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
5. C Short 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 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 Operation Range Work in the range of Rated Current Rated voltage and Rated Power The figure is as following Rated voltage Zz Rated power A ASVLIOA LAN Input current Rated current Operation mode change state Rated voltage c z Software Power Limit Software Current Limit A 39VLI0A LNdN
6. Please refer to the software user s guide The following example will help you how to do the list operation in front panel 26 Trigger Piru oi 1 2134 5 List count 1 e List count 2 gt List sequence Action 1 Press the button o On Off execute the input of Load in OFF state 2 Press Shift_ CMenu move cursor to the option of menu of CONFIG Press CEnter into the next step menu move cursor to TRIGGER SOURCE Press CEnter and move cursor to IMMEDIATE lt DEF gt setting trigger source mode is panel IMMEDIATE mode Press CEnter to confirm Press E to the previous menu move cursor to LIST SET Press Ente into the next step menu move cursor to EDIT LIST FILE Press CEnter into the next step menu move cursor to CURRENT LIST select CURRENT MODE Press Enten move cursor to REPEAT Setup LIST is in cycle mode Press to confirm setup the list steps 5 Press to confirm setup step 1 current 3A Press to confirm setup step 1 width 6ms 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 lt LIST MODE gt 14 Press to confirm 15 Press PressCON 0ft make Load in ON state Press C Shift Trigger make list operation run or stop 16 Stop the list
7. 10 Input Voltage2FS 10 100 9990 1 0 3 FS 1K 4KQ 1 0 8 FS 1 CW Mode Regulation 0 100W 1 0 1 FS Input current 2FS 10 mW Input Voltage2FS 10 100 600W 1200W 1 0 1 FS 100mw Current Measurement Yann SO ES 0 120A 240A 0 2 0 15 FS Voltage Measuremen toa AnS DAREN Input current2FS 10 Input Voltage2FS 10 100 600W 1200W 1 0 1 FS 100myV CAS TAS Ga ar Input 0 1 120V Max measurement capacity 999AH y 9 Resolution 10mA Timer range 1 60000sec Transition Mode Range o Frequency 0 1Hz 1kHz Frequency error rate lt 0 5 30 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 input 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 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 com
8. 3 Press Shift 4 Recall set the store code that you set before press Enter to 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 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 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 input of electronic load then connect the load with battery 2 Press Eset on the pane
9. CONFIG 2 Press Ente into the submenu VED displays gt INITIAL CONFIG 3 Press V to make VFD display RANGE SELECT 4 Press CEnter jo confirm and press V to choose ON 5 Press CEnter to confirm 6 Press to exit menu Then you can press CShift 4 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 Shift 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 Shift to make it become 120V also the resolution will become as 10mV On the other hand you can press Shift w 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 Shift Y 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 D y to make it become 12A and the resolution will become as 1mA 29 Specifications Voltage 0 to120V 0 to 120V mao e Curent tmAtot208 tmatzwa O 40 Current 1mA to120A 1mA to240A ow 1200 Accuracy Resolution 0 18V 0 05 0 02 FS 1mV 0 120V 0 05 0 025 FS 10mV Load Regulation 0 12 24A 0 1 0 1 FS 1mA 0 120 240A 0 2 0 15 FS 10mA Regulation 0 120A 240A 0 2 0 15 FS 1 0 3 FS CR Mode Regulation 10 990 1 0 3 FS 0 010 Input current 2FS
10. STEPS Total 4 files and each file have250 list steps 2X 500 STEPS Total 2 files and each file have500 list steps 1 X 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 9 automatically OFF lt DEFAULT gt TIMER SET Setting time of LOAD ON timer EXIT EXIT General Information Document Orientation This manual describes the operation of the IT8500 series 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 Verifying proper operation Using the front panel User s Gui
11. cccccccccccccccccccee cece cece cece lla 11 Constant Resistance CR Mode cccccccccceeeceeeceeeeeeeeeneaeeeeeeeeseseccneeaeeeeeeeeseneeieaeeeseeeeteeeas 12 Constant Voltage CV Mode ccccceceeeeeeeceeceeeceeeeeeeceaeaeeceeeeeeesecaeeaeeeeeeeseeeceneaeeseeeeetseeas 12 Constant Power CW ModE siana seiiet e a o e i N EE a 12 TRANSIENT OPERATION cuicos 12 CONUAUQUS it teta o to a 13 PUIS Es sc Li 13 Trigger Modes eae a ia a ner 13 ListO pera A a aia 13 TRIGGERED OPERATION costo a A A knees 14 INPUT CONTROL escusa ete 14 SKOT OMOT aeien e as es ego illa 14 INPUEO MO ica ip 14 Operation Ranges miii A ii 15 PROTECTIONIFEATURES seca ti tit a e tia o dveacteeut eaten 15 REMOTE SENSE FUNCTION isc isla li oi wnt dened beens Oana endl dade en les 16 SAVING AND RECALLING SETTINGS 2 ccccccceceeeeeeeeeeeceeeeeeeececncaeaeeeeeeeeseseccceeeaeeeeeeeeseeceieaeeeeeeeeteeeas 16 BATTERY TESTING 4 208 rr EA A EE ea 17 VON VOFFOPERATI N cescocccotcncot asiatico iot aptes presti enters iran itin Met ed ei sent ets 18 INSTALLATION eis i a a a a EE ie et ci 18 INSPECTION ei E tota act Gadea daca tt ttatseeteicesi 18 Damadge tut time tit da 18 items Supplied si iii A Li A aa il 19 CIOani di LA A 19 LOCATION A uts r s 19 A EEE 19 BENCH OPERATION corista ita citas 20 RACK MOUNTING A a daten 20 INPUT CONNECTIONS ada ee os 21 POWE CO dinnat il A ci 21 Trigger and Remote Sensing Connections coooooccocccncccccnono
12. current resistance and voltage modes Set and reset protection functions Scroll through front panel Ls Input terminals The Rear Panel ET 02D sz MAA TT ELIO S amp S C amp D a E 3 Pin 1EC320 ac input connector Power code requires ground conductor El 4Pin Trigger and Remote sensing connectors E 9 Pin COM port interface connector El Power switch 110V 220V Front Panel Annunciators OFF input off Trigger Indicates that the electronic load is waiting an initiate and trigger to occur cc Constant current CC mode Sense Indicates that the electronic load is in Remote sensing state CV Constant voltage CV mode Error JA 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 state RS 232 In the remote state only the active key is the Local key The input channel is enabled for R 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 a Store Recall S Tran Menu Local Battery Short Trigger l set V set ET 3 amp 9 B Tran CP set R set C Shift nput on of Z 2 0 through 9 are used for entering numeric values
13. 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 Oms 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 2 Press C Shift D G Tran set LEVEL A 5A pressCEnter set WIDTH A 3ms press Enten set LEVER B 10A press Enten set WIDTH B 2ms press Entento confirm 3 transition mode now is CONTINOUS press CEnterDto confirm 4 Press CTran Dto activate the transient mode 5 Press Shift Gian again 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 25 For example When load receiving one trigger signal it will switch to 10A current value and taking 10ms to return the current
14. A system will go to the step 4 directly Display the information of the product Type series number version of software LOAD MODEL IT85XX 4 Press Shift button and SN XXX XXX XXX A VReys VER X XX Display the actual input voltage 5 Press Eso button 0 000V 0 000A and current value A Press AV 0 000W 1 0 000A Display the actual power value 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 Make sure if you have connected the power cord to the unit and plug it in Power switch have been pressed 1 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 22 2 Check the fuse of load If fuse is blowout please change it as following specification Model Fuse specification Fuse specification 110VAC 220VAC IT8513C T0 5A 250V T0 3A 250V IT8514C T0 5A 250V T0 3A 250V 3 Location of Fuse ET ES SEA AS ET I Sos CAS EA ass GL BAS CAR gt a a Ce ALAYO ANN DO DO Is IT AO SD ETS SSS Ce XL TS SO SES CSS SSA Front Panel Operation Example I set set up a constant cu
15. ILE Press Ente 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 value here the maximum is 3A Press Band press CEnter to confirm 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 value here the maximum is 18V Pres PB GO to set MAX VOLT 18V press to confirm VFD displays MAX POWER 200 00W which means setting the maximum of power here it is150W Press D 0 O to set MAX POWER 150W press to confirm VFD displays TEST COUNT 2 vvhich means setting steps of testing 20 steps are permitted at most here they are 6 steps Pres BD to set TEST COUNT 6 press to confirm Setting the mode of current procedure press A V to choose one mode in CONST CURRENT CONST VOLTAGE CONST POWER CONST RESIS Here the first step is CC mode press A Vto gt CONST CURRENT press Enter to confirm VFD shows SET 1 20 000A which means setting the current procedure Here the first sis 0 21A res 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 Entento confirm 11 Select the test number of this step press A W to choose gt READBACK V PRESSCEnter to confirm 12 VFD dis
16. 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 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 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 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 inpu
17. USER S GUIDE Programmable DC Electronic Load Model IT8513C IT8514C Copyright 2004 All Rights Reserved Ver1 1 APR 2006 IT8500 401 1 QUICK REFERENCE ei ds tati a aa teed alee eon atelier ates aah tals 6 THESPRONTRANEL te A eds hoe aaa etmek 6 THERREAR PANEL cities GS ma a dia 6 FRONT PANEL ANNUNCIATORS ocooocccocoooconoconoconononnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnRnnRRnnnnnnnnnnnnnnnnnnnnnneneneneneness 7 KEV PADES etat ten tra emeten ce ena ets dol co dao to toco del oda mester es Ms 7 IMMEDIATE ACTION KEYS 000 vee Dr a i act a ee ua De reis 8 MENU OPERATION teu eo tegenea nia cesa 8 GENERAL INFORMATION cooocococcnnncnnncnnnonononnncnnnconnnonnnonnonononnnnnnonononnnnnnronnnonononnrnnnnonnrn nono ennn ennnen een 10 DOCUMENT ORIENTATION cc iii iii em dindi mi ai 10 GETTING STARTED MAP viii A iO We ceeds 10 OPTIONS AND ACCESSORIES aiala rasoei aa aads EE TEA aeeeeeeseeeeegaaeaneeseeeesseqeaeaneeseeeetenesiaaes 10 Option Sa a A ih onde ie trade cet te ae oe NE 10 AGCESSOMES E EAE TEA AA titat A E EA EEATT 10 DESCRIPTION tics 222 a EE o a ASS a 11 FEATURES AND CAPABILITIES 2 2 sc0ssceescesesesscesscesscsesseescasscesecesseauecescceseesestagceascseseceusuagerssctenerss 11 FRONT PANEL CONTROLS cceceeeeceeeeeeeeeeceeeaeeceeecesesecaaeeaeeeeeeeeseceeeaaeeeeeeeesesescueeeeeeeeeesesnsunaneeeees 11 REMOTE PROGRAMMINGis inci ti tida teta 11 OPERATING MODES ci ras te ee PE Et aten dis 11 Constant Current CC Mode
18. de Calibrating the unit Using the front panel Front panel keys User s Guide Front panel examples Using the programming interface RS 232 interface Remote operation mode Protocol information Controller Program and Software driver Power View PV8500 software Calibration PC8500 software CD ROM Active driver PD8500 OCX software User s Guide User s Guide 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 series port TTL 5V level to PC RS232 interface IT E132 isolated communication cable This cable converts the electronic load s series port TTL 5V level to PC USB interface IT E134 isolated communication cable This cable converts the electronic load s series port TTL 5V level to PC GPIB interface 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 voltag
19. e CV mode or constant resistance CR mode and constant power CW mode Features and Capabilities 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 interface DB9 RS232 port e Triggered input and measurement functions e Within the controlled keypad in the front panel e Built in pulse generator for continuous pulsed and toggled transient mode operation e Over voltage over current overpower and over temperature protection e Electronic load calibrate by Software e Fan speed control by temperature e VFD display e 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 Constant Current CC 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 f
20. e the front C Shift_ Cattery Battery discharge electronic operation C Shift C Short Turn on or turn off short circuit Test C Shift CTrigge Causes a trigger to occur Change the trigger source is IMMIDIATE the completely menu list as following If press CEnter key you could get the selected menu function Press back 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 Setup of the electronic load input state in Power on ON When users turn on the electronic load the electronic load input will keep the state of last time when users turn off the electronic load OFF lt DEFAULT gt When users turn on the electronic load the electronic load input will keep the state off KEY SOUND SET Keypad sound setting ON lt DEFAULT gt Enable key sound OFF Disable key sound El 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
21. e using the remote sense function Action 14 Press enD Menu key into the menu 2 VFD y gt CONFIG press Ente key to confirm 3 Press A choose gt REMOTE SENSE press Ente key to confirm 4 PressA 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 voltage resistance transient level etc Users could use CShift CStore ang CShift CShift Recall Recall to save and recall the relative data as follovving 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 CD set a value of current or voltage press Enter to confirm 2 Press Shift_ Store gt set a store code at random press Enter to confirm
22. equired 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 12 Continuous Generates a repetitive pulse stream the toggles between two load levels and change the state between value A and value B 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 TWD TWD 10ms 10ms 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 gro
23. eys to set Voff value OV to max voltage value press Entento 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 E172 cords appropriate for your location IT E173 User s Guide Contains installation checkout and front panel information and Programming information Software CD Rom 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 429mmW x88 2mm H x 354 6mm D Outline Diagram Unit mm 19 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
24. l VFD displays CURRENT A set discharge current value and press CEnter to confirm Note the discharge current should not be more than the current that the battery can supply 3 Press C Shift_ Gattery VFD displays MIN VOLT V set the min voltage value press to start the test When the battery voltage reaches as the min voltage the battery test will stop During the testing press down key Wand up key A to observe the voltage current and discharge capacity of the battery and the power of load 4 Press Shift G attery ty stop battery test f Battery Voltage Min voltage 4 Load Sink Current gt 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 Wott Yon Action for set Von Voff value 1 PressC Shift Menu into menu 2 VFD displays gt CONFIG press Y key to choose gt SYSTEM SET press Enten to confirm 3 VFD displays gt MAX CURRENT SET press Y key to choose gt VOLTAGE ON SET press CEnter Rey to confirm 4 VFD displays gt VOLT ON 0 00V press numeric keys to set Von value 0 1V to max voltage value press Entento confirm 5 Press V key to choose gt VOLTAGE OFF SET press Entento confirm 6 VFD displays gt VOLT OFF 0 00V press numeric k
25. lug are provided on rear panel for accessing input signals and remote sensing all leads connected to the connector should be twisted and shielded to maintain the instrument s specified performance Remote Sensing sense and sense Used to connect the remote sensing leads to the power source TRIG IN TRIG IN 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 TRIG GND TRIG Provides the common connection for the trigger signals 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 EPROM ERROR Run well 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 DAT
26. munication IT E132 communication LAVIS INSTRUMENT 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 IT E134 ISOLATED Serial IEEE 488 Controller Electronic load GPIB line 31 Note Forbidden to connect DB9 connector in electronic load directly with PC or other RS232 port 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 1 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 communicatio
27. n cable 32
28. nonncnnonocnnnannnnnnnnnnoncnnnnnnnnnnnnnnnennnnnnnes 22 TURN ON CHECKOUT sna avian hack A dag ai Gara AA ac eae 22 INTRODUCTION scripts 22 CHECKOUT PROCEDURE 20000 Aa 22 InCase of Trouble ca e temes 22 FRONT PANEL OPERATION 2 cccceceeeceeeeeeeeeee cree cecceeaeeeeeeeesceneaaeeeeeeeeeesenecaeeseeeeeeesesnenneaneeeees 23 EXAMPLE ie heath e AS Malt ee a 1G te 23 l set set up a constant current from O to Max Current cccccceeeeeeceeceeeeeeeeeeeecenceeeeeereetees 23 P set set up a constant power from O to Max pOWeT oooococccccconoconooccccocccccncononnconnnnnnonannnnenennnnos 24 R set set up a constant resistance from 0 10 to 40000 oococococococccccccococncononnnononcnnonannnnnnnnnnnos 24 V set set up a constant voltage from 0 1V to Max VOltage oooooocccccccncocococccccccccnnnananccnnnnoninnns 24 Shift E Store A A A A MS SS caer EET is 24 Shift Recal iii dla ia 24 In On Off input setting 2 2 eee cece cece ee ceeeeeee cece ceee cece aaeeaeeeeeeeesceaaaeeeeeeeesesecccaeeseeeeeeesesnenieaeeeeees 24 TRANSITION TESTING OPERATION c ceeceececeeeeeeeceneaeeeeeeeeeeecceeeaeaeeeeeeeeeecceeaeeeeeeeesseeeieeeseeeetseeeas 25 Transition Parameter Setting cc cccccceceeeeeeeceeeeeeeeeeeeeeeeeaeaeeeeeeeescegeaeaeeeeeeeeseeeeiaeeeeeeeetseees 25 Continuous Transient Operation ccccccceeecesececeeeeeeeeeceeeaeeeeeeeeeesececeeeseeeeeeeeseeseneaeeeeeeeeteeees 25 Pulse Transient Operation
29. nts 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 PO 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 a hazard It calls attention to an operating procedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the products Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Quick Reference The Front Panel El 16 character display shows voltage and current measurements EH Rotary knob El Power switch On Off El Entry keys numeric keys Enter values Increasing or decreasing the setup values Menu commands Ls Keypad Enable disable input Setup the
30. operation are 25 mm along the sides Do not block the fan exhaust at the rear of the Load Rack Mounting The 118500 series electronic load can be mounted in a standard 19 inch rack Rack mount kits are available as Option IT E151 The electronic load can be mounted in a standard 19 inch rack panel or enclosures using an Option IT E151 rack mount kit Rack Installation Unit mm Elevation for Installation one electronic load in a standard 19 inch rack NOTE You need to use a screwdriver remove the two plastic ears on the two front side before rack mounting the instrument 20 ll Le Dig 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 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 Oa Es China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 21 Trigger and Remote Sensing Connections A 4 pin connector and a quick disconnect mating p
31. operation mode Move cursor to LIST SET press Enten move cursor to Mode Set in option menu press CEnter enter into next step menu Select mode is lt FIXED MODE gt 17 Press to confirm Fast Recall Function You recall 10 groups numbers very conveniently which were stored before Action 1 Press Shift 4CMenu 2 Press Vto CONFIG press Enter into submenu press Y to SHORTCURT RECALL 3 Press CEnter select gt ON and press CEnter to confirm 4 Press8 tvvo times and quit the menu 5 Press and you can get the first group number Press 2 you can get the second group number Press 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 27 The test proceeding of R35 charger process method Mode Voltage V Current mA Power W Ripple counter 1 step CC 5 8 6 15 210 lt 4 input175VAC Dm step None 5 9 6 4 0 1 2 input175VAC rd 2 step CC 5 205 245 lt 60mVpp 4 step CV 3 205 245 5 step CV 2 205 245 6 step Short circuit 0 245 Edit the Testing File 9 PregsC Shift CMenu into menu VFD displays gt CONFIG Press Y to gt LIST SET Press CEnter into submenu press Y to gt EDIT LIST F
32. plays MIN 1 120 00V which means setting the lower limit Here the first step is 5 8V Press Q G press Enter to confirm 13 VFD displays MAX 1 120 00V which requests setting the upper limit Here the first step is 6 15V press 0 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 Triggen the testing will continue Here the first step is 1 second press and then press Enter tg confirm 15 Repeat 9 14 and set the other process step by step as follows CONST CURRENT 0A SHORT OFF READ BACK V 5 9V 6 4V 1s CONST VOLTAGE 5V SHORT OFF READ BACK A 0 205A 0 245A 1s CONST VOLTAGE 3V SHORT OFF READ BACK A 0 205A 0 245A 1s CONST VOLTAGE 2V SHORT OFF READ BACK A 0 205A 0 245A 1s CONST CURRENT 0A SHORT ON READ BACK A 0A 0 245A 1S Moo gt 28 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 pres OD and press CEnter gt to confirm 17 When the edition of a
33. rements 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 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 compone
34. ront panel keys The CC mode parameters are discussed in the following paragraphs l CURRENT SETTING LOAD 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 l LOAD SLOPE CURRENT RESISTANCE SETTING LOAD INPUT Vv VOLTAGE CONSTANT RESISTANCE MODE 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 gt POWER LOAD INPUT V2 gt SETTING VOLTAGE V3 a I2 I3 l LOAD CURRENT CONSTANT POWER MODE Transient Operation Transient operation enables the electronic load to periodically switch between two load levels as might be r
35. rrent 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 STEP 1 Press Eset CURRENT 0 000A STEP 2 Enter the password or jump the step 4 PASSWORD if your password for reentering STEP 3 Enter the original value which CURRENT A displayed in the LCD or enter a new value by using number keys or Rotary knob to adjust the voltage value STEP 4 Press io 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 upCtset_ 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 I se
36. t 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 component 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 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 the function 4 Pin trigger and remote sensing connectors N 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 befor
37. t to confirm the value 0 00A 0 00V 0 0W 4 33A Procedure 23 Step1 Press CAD button Step2 Adjust the Rotary knob to change the value the operation is as the same as item 1 Step5 PressCEnter 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 Step1 Press PED POWER 0 0W Enter a new value by using numeric Step 2 keys or Rotary knob to adjust the POWER W voltage value Step 3 Press Ee to confirm 0 000W P 000W R set set up a constant resistance from 0 10 to 40000 IT8500 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 Reset 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 ProessQ 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
38. up 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 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 120 steps When receiving one trigger signal it will start the list operation until receiving another trigger signal or finish the List operation Trigger Em Ln 2i 3i 4 5 Listcount 1 e List count 2 List sequence Triggered Operation The electronic load has various triggering modes to allow synchronization with other test equipment or events Such as Keypad triggering mode Press Shift 4Triggen 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 Shift
39. utomatic testing file is finished press CEnter two times to back the menu Fast Recall the Test File 1 Press CShift CMenu Dto enter into menu VFD displays gt CONFIG Press V and move the menu to gt LIST SET 2 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 Ete 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 PressC Shift Ctset_ to enter into automatic testing VFD displays the name of current file NAME TEST FILE1 2 PressCEnter to observe the voltage and current we inputted and also can observe the step number of test ing 3 PressC Shift CD anc begin to operate when the automatic testing is pause the current prolong time of one step is 25 5s press Shift riggeD also can make the testing continue 4 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 PressA Y also to observe the numerical value and result of every step 5 Press to 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 Menu enter into menu VFD displays gt
40. value of 5A TWD TWD i Oms I i Oms TRIG TRIG Pulsed 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 2 PressC Shift G Tram set LEVER A 5A LEVER B 10A WIDTH B 10ms Transition mode now is CONTINOUS 3 Press Y till gt PULSE 4 PressCEnter set transient mode is PULSE 5 Press Shift_ Tran Dto activate the transient mode 6 Press Shift TriggeD to start another pulse Press Shift Triggen get more pulse 7 PressCShift Gian again to stop the transient operation 8 Press On OM the input of load is powered on 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 Toggled Transient Operation TRG TRG Action 1 Press Shift G Tran Setting LEVER A 5A LEVER B 10A transition mode is PULSE 2 Press CShift CTran Dto activate the transient mode 3 Press Shift Triggen switch to the current value of 10A 4 PressC Shift rigen switch between 5A and 10A 5 PressC Shift ran 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
41. very 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 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 requi
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