"user manual"
Contents
1. 4 Location of Fuse FUSE a KO GLA O gt e E DEL EE E LS m EL E A GH a lo ca 2 L3 o gt a ED oF paoc Ge CL CE catu Front Panel Operation Introduction Here is what you will find in this chapter A complete description of the front panel controls Front panel programming examples Display 16 character fluorescent display for showing measurements and programmed values Annunciator Annunciators light to indicate operating modes and status conditions OFF power off Trigger Indicates that the electronic load is waiting an initiate and trigger to occur cc The selected input channel isin Sense the constant current CC mode Indicates that the electronic load is in sense state CV The selected input channel isin Error the constant voltage CV mode A errors have occurred CW The selected input channel is in Link the constant power CW mode In the communication state CR The selected input channel isin Rmt the resistance CR mode Indicates that the electronic load is in remote state RS 232 In the remote state only the active key is the Local key Tran The selected input channel is Shift enabled for transient operation Indicates that the shift key has been pressed List A list is initiated or running Lock keyboard is the mode for password Function keys Main Function2. 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 DATA system will go to the step 4 directly l LOAD MODEL IT85XX Display the information of the 4 Press Shift button and dai SN XXX XXX XXX product Type series number A V keys VER x xx version of software Display the actual input voltage 0 000V 0 000A 5 Press Es button and current value Display the actual power value 6 Press AV 0 000W 1 0 000A pay P and setting value In Case of Trouble Electronic load failure to run during power on operation The test of following in this section helps 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 22 2 Check the power voltage setting Work voltage of load have two type 110V or 220V Please make sure it is right voltage accordance to the voltage in your area You could change the voltage setting through dial the switch in the rear panel 3 Check the fuse of load If fuse is blowout please change it as following specification Model Fuse specification 110VAC Fuse specification 220VAC IT8513B T1 25A 250V
3. aaan 24 Ps 24 Examples 22 2 ORC ERE BA 25 I set set up a constant current from O to Max current cccoonoccccnnoncccnononoccnconnnncnnnnnancnnnnnnn cnn nnnnnncnnnnnnss 25 P set set up a constant power from 0 to Max power emen 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 VO tage ooococccnnoccccnnnccccnconanccnnonnnnconnnnnnconcnnnncnns 26 Shift SIOIG i noon delen aW RE ERR iaa 26 jail Recalde tt dl iaa 27 In Om OIrFInpUb Sellilig doo A A i i Ii re lS a cl 27 Transition Testing OPperati n otio eee eee aie ai 27 Transition Parameter AAA O A 27 Continuous Transient Operation T 27 Pulse Transient Operational lala 28 Toggled Transit A RR OE ERR DER RE iaa 29 Bio vue o AT 29 Fast Recall Furictiohi us inediti P E a ean EXER Fx AG Da EE CoD a tia nadie 30 Automatic Testing Function of Electronic Load seseeeeneeemenmeeneennnne 31 Edit ihe Testing File zi Redde dede 31 Automatic Testing inscrito 32 Select the Precision between Low Range and High Ran coocococccocccoccconccnoconancconcconcconnncnnncnnncnnnnnnn 33 SPECIFICATONS coa e o ll oia 33 REMOTE OPERATION NODE cui e e o de o da ri aa T 34 1 Communication cable 2 n gna nea ER e a v en e ve Pe aet dans 34 2 Communication between electronic load and PC esesssssseeeeeeeeenee nnne 35 Warranty Information Certification We certify that this
4. Procedure Operation details VFD display Step1 Press Bse RESISTANCE 0000R enter a new value by using numeric keys or Rotary knob Step 2 RESISTANCE R to adjust the resistance value Step 3 Press Enter to confirm 0 000W R 0000R V set set up a constant voltage from 0 1V to Max voltage 8500A electronic load can be setup for a constant voltage Constant voltage setup procedure is as following Procedure Operation details VFD display Step 1 P gas VOLTAGE 1 500V Step 2 enter a new value by using ick Rotary knob namere eys Ela otary kno VOLTAGE V to adjust the resistance value Step3 Press ED to confirm 0 000W V 3 000V Shift Store Procedure Operation details VFD display Step 1 Press Shift ana Store gt STORE 1 Step 2 Press enter to confirm Store the relative data 26 Shift Recall Procedure Operation details VFD display Step PressCShift ang Recall RECALL 1 Step 2 Press Entel to confirm Recall the saving data In On Off input setting Use ONO to change the input state of electronic load Switch on to off state by press On Off 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 TRAN ON AND TRAN OFF to make
5. Set up a constant current output Set up a constant power output Set up a constant resistance output Select CC CR and CV and CW modes Select Current Resistance and Voltage levels Set Trigger and Transient levels Set up front panel measurements Recall the stored data Battery testing Short circuit testing Entry Keys Entry keys let you Enter programming values Increasing or decreasing setup values Press A or V select the front panel menu parameters Power The Power switch turns the electronic load power on or off 24 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 8500 serial electronic load provides two methods to set up the constant DC current output by using the number keyboard and the rotary button Please see the following operation procedure Procedure Operation details VFD display RRENT 0 STEP1 press SED c es Enter the password or jump the step 4 PASSWORD if your password for reentering Enter the original value which CURRENT A STEP 3 displayed 1 the LCD or enter a new value by using number keys or Rotary knob to adjust the voltage value STEP 4 Press to confirm 0 000V A Setup the output 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
6. Operation 1 Turn off the output of electronic load then connect the load with battery 2 Press Eset on the panel 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 Battery 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 V and up key A to observe the voltage current and discharge capacity of the battery and the power of load 4 Press C Shift Battery io stop battery test Battery Voltage Min voltage a Load Sink Current External Control Signals Electronic Load has a 4 pin connector mounted on its rear panel These signals are described in the following paragraphs 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 Ins
7. Step3 Press button to confirm the current value Method 2 To set up Eset by using Rotary SW 1 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 Step1 Press Eset button Step2 Adjust the Rotary knob to change the value the operation is as the same as item 1 Step5 Press Ente button to confirm the current value 25 P set set up a constant power from 0 to Max power 1T8500 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 C P set POWER 0 000W Step 2 Enter a new value by using numeric POWER W keys or Rotary knob to adjust the voltage value Step 3 Press Ene to confirm 0 000W P 000W R set set up a constant resistance from 0 10 to 40000 8500 series electronic load can be setup for a constant resistance Constant resistance setup procedure is as following
8. 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 9596 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
9. 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 delivery During the warranty period our company will either repair or replace products which prove to be defective Our company does not warranty that the operation for the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by our company Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to our place for warranty service Our company shall pay for return of products to Customer Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance Assistance The above statements apply only to the standard product warranty
10. 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 nat 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 gt A 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 correctl
11. 20 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 Mia 2i 3i List count 1 4 5 1 List sequence List count 2 gt Triggered Operation The electronic load has various triggering modes to allow synchronization with other test equipment or events Such as Keypad triggering mode Press CShift_ 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 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 circ
12. A 0 1 0 1 FS 10mA 0 18V 0 02 0 025 FS 1mV Voltage Measurement 0 500V 0 02 0 025 FS 10mV 0 100W 1 0 1 FS 1mW Power Measurement 100 600W 1 0 1 FS Input 0 1 500V Max measurement capacity 999AH Battery testing function Resolution 10mA Timer range 1 60000sec 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 cable 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 E132 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 i
13. HEAT Remote Sense Function When work in 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 Saving and Recalling Settings The electronic load has internal registers in which settings mode current voltage resistance transient level etc Users could use C Shift Store 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 cu
14. 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 Work produce process method Mode Voltage V Current mA Power W Ripple counter mVpp The first step CC 5 8 6 15 210 lt 4 input1 75VAC The second step None 5 9 6 4 0 1 2 input1 75VAC The third step CC 5 205 245 The fourth step CV 3 205 245 lt 50mVpp The fifth step CV 2 205 245 The sixth step Short 0 245 circuit Edit the Testing File Press CShift CMenu into menu VFD displays gt CONFIG Press Y to gt LIST SET PressCEnter into submenu press Y to gt EDIT LIST FILE Press Ete and begin to edit the automatic testing file VFD shows MAX CURR A 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 ER press Ente to confirm VFD displays MAX VOLT V 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 DEO to set MAX VOLT 18V press to confirm VFD displays MAX POWER W which means setting the maximum of power here it is150W Press D 5 0 to set MAX POWER 150W press to confirm VFD displays TEST COUNT which means setting steps of testing 20 steps are permitted at most here they are 6 steps Press 8 to set
15. TEST COUNTS 6 press to confirm Setting the mode of current procedure press A Wto choose one mode in CONST CURRENT CONST VOLTAGE CONST POWER CONST RESIS Here the first step is CC mode press A Vio CONST CURRENT press Eeto confirm VFD shows SET which means setting the current procedure Here the first sis 0 21A iiO O 2 1 then press CEnter ig confirm 31 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 pressA V to choose gt READBACK V PREssCEnten yy confirm 12 VFD displays MIN z which means setting the lower limit Here the first step is 5 8V Press 9 O 8 oros nDo confirm 13 VFD displays MAX which requests setting the upper limit Here the first step is 6 15V press 6 2 0 5 then pressCEnter to confirm 14 VFD shows DELAY 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 output stable the range of prolong time is 0 255 seconds when the setting is 255 seconds automatic testing will be pause only the user press Shift rigen the testing will continue Here the first step is 1 second a then press Eteo confirm 15 Repeat 9 14 and set the other process s
16. TTING LOAD INPUT v 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 I 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 V LOAD INPUT V2 VOLTAGE v3 POWER SETTING 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 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 trans
17. USER S GUIDE Programmable DC Electronic Load Model IT8513B QUICK REFERENCE ocioteca cc a 6 The Rear Panel eee eee de Me eee on 7 Front Panel Annuriclator a 3 cd aide dde sedili edid indies 7 Immediate ACTION KSyS cristal 8 FrontPanel E 8 A sensu M M D x I M I IM DIM IM MUNI M IP PD DOQINII MI MONA NS NO 8 AIN utet tuu I MM I MED MM MI D dM a IN 9 GENERALE INFORMA MON Esso in bibite 11 DOCUMENLOFSNIAON 11 Geltung MS ont Stain a tal a Lat fa quate stated 11 Opti risald Accessories eue Lec NC LIU CL DU Dm CI es 11 OI leeis 11 ACCOSSOMOS m 12 B Izerjen o epe 12 Features and Capabilities uen tetti ueste estre cte anderes ea SEEDER acne tra Me Mrd eat Rd cfe 12 Fr nt Panel COMTO EMT ME ENS 12 Remote Programming cccccccescceceeeceeeeneeeeeneneeeeeeeneeenaneseeeessanenesaneseanessaneeeaneseasesseneeennenenaneseeeeeesas 12 Opera IONS Si et tla Si ct tng E 12 Constant Current CC Mode ates coud tadas 13 Constant Resistance CR Mode ccccccccescceseeeeeeeeeeceaeeeceneeeeaeeessaeeeseneeesneeseeeeseaeesseneeeseeeessueeeseaes 13 Constant Voltage CV MOGG 5st ote ertet ertet a a ep erret rete eta 13 Constant Power CW Mode sssssssssssssseseeeeene nennen nenne name n nen nn nennen rnt nenne nnne 14 Transient DOT tacens A AAA iid RR etu t uscite etc tt RRE 14 GORDON denda in
18. automatic testing is pause the current prolong time of one step is 255S press Shift TriggeD 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 Press 4 V also to observe the numerical value and result of every step 5 Press So back the automatic testing Select the Precision between Low Range and High Range Select the low range and high range you can measure the voltage and current more precisely Action 1 Press Shift Menu to enter into menu VFD displays gt CONFIG 2 Press Ente nto the submenu VFD displays gt INITIAL CONFIG 3 Press V to make VFD display RANGE SELECT 4 PressCEnter to confirm and press Y to choose ON 5 Press CEnter to confirm 6 Press 9 to exit menu Specifications Output Rating 0 40 C one som Accuracy 1 Resolution 0 05 0 02 FS Load Regulation 0 05 0 025 F S 0 1 0 1 FS 0 2 0 15 FS 0 1 18V 0 05 0 02 FS CV Mode Regulation 0 1 500V 0 05 0 025 FS I 0 3A 0 1 0 1 FS CC Mode Regulation 1 0 20A 0 1 0 1 FS i CR Mode Regulation 0 1410 Q 1 0 3 FS 0 001 Q 33 10 99 42 1 0 3 FS 0 01 Q 100 999 Q 1 0 3 FS 0 1 2 1K 4K Q 1 0 8 FS 0 100W 1 0 1 FS i 1mW CW Mode 1 100 600W 1 0 1 FS 1 100mW 0 3A 0 1 0 1 FS 1 1mA Current Measurement 0 20
19. 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 Press directly to disable the key lock function 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 4X250 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 the timer state ON and then turn on the 10 electronic load input the LOAD ON TIMER
20. d Accessories Options IT E151 Rack mounts kit for install one or two IT8500 series load on the 19 inch rack IT E131 isolated communication cable This cable converts the Electronic Load s serial port TTL 5V level to PC RS232 interface IT E132 isolated communication cable This cable converts the Electronic Load s serial port TTL 5V level to PC USB interface IT E134 isolated communication cable This cable converts the Electronic Load s serial port TTL 5V level to PC GPIB interface Accessories Power cord User s manual Calibration testing report Description The IT8513B 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 The IT8513B 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 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 Within the controlled keypad in the front panel Built in pulse generator for continuous pulsed and toggled transient mode operati
21. elect CURRENT MODE Press ED 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 LIST MODE gt Press to confirm Press Eso Press OWOfD Make Load in ON state Press Shift riggen make list operation run or stop Stop the list operation mode Move cursor to LIST SET Press CEnter move cursor to Mode Set in option menu press CEnter Enter into next step menu Select mode is lt FIXED MODE Press to confirm Fast Recall Function Action Press C Shift CMenu Press Vto CONFIG press Ete into submenu press Y to SHORTCURT RECALL Press Ee select gt ON and press Ente to confirm Press 9 two times and quit the menu 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 30 Automatic Testing Function of Electronic Load After developing of IT85xx electronic load version 1 57 we add automatic testing function that is convenience for you test various parameters of power supplies at different loads
22. f NV Key Pad 0 through 9 are used for entering numeric values Decimal point The escape key It may used to exit any working state Choosing CC mode and setup the input current of regulation current mode V set Choosing CV mode and setup the input voltage of regulation voltage mode P set Choosing CW mode and setup the input watt of regulation power mode R set Choosing CR mode and setup the input resistor of regulation resistance mode Shift Shift keys On Off Power ON OFF O O CRNE d Scrolling keys let you move through the commands in the presently Select function menu Bring up the next command in the list Function menus ari circular you can return to the starting position by continuous pressing the key V Go back to the previous command in the list Function menus are circular you can return to the starting position by continuous pressing the key Confirmation key Menu Operation Press Menu to indicate operation mode View the menu in VFD and using Y and A to scroll through the completely menu list as following IF pressCEnter key you could get the selected menu function Press pack 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 elect
23. ient operation Transient operation may be used in the CC CR or CV or CW modes and can be setup in continuous pulsed or toggled operation mode Continuous Generates a repetitive pulse stream the toggles between two load levels and change the state between value A and value B 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 Oms gt TRIG Pulsed Transient Operation Trigger Mode TWD i Oms TRIG Switching the state between value A and value B once receiving a triggering signal 5A7 77 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 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 1
24. input channel is enabled for Shift Indicates that the shift key has been transient operation pressed Tran List List mode is initiated or running Lock keyboard is locked by password Unreg The input is unregulated Immediate Action Keys lt o lo Choosing CV mode and setting the input of regulation voltage mode l set Choosing CI mode and setting the input of regulation current mode Choosing CP mode and setting the input of regulation power mode R set Shift Shift e 2 J Choosing CR mode and setting the input of regulation resistor mode A Switch to A setting value Switch to B setting value Shift 4 CShift 2 Press to store an existing electronic load state in non volatile Memory CShift Press to recall an existing electronic load state in non volatile Memory Enter operation Menu Shift Short Turn on or turn off short circuit Test Start Stop transition operation Causes a trigger to occur Change the trigger source is IMMIDIATE Shift Battery Battery discharge electronic operation Shift S Tran Set the transition operation parameter On Off Enable or disable load input Front Panel Menus POWER C I set_ V set P s 0008 B Tran Store Recall S Tran Menu Local Battery Short Trigger CP set R set ENTER Shift nput on o
25. 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 tg set the transition parameter CShift LEVEL A Setup value A WIDTH A Setup time width of value A LEVEL B Setup value B WIDTH B Setup time width of value B CONTINUOUS Choose one of the three PULSE transition modes 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 210A width 2 3ms Testing machine output voltage is 12V 27 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 O to turn off the load input 2 Pres
26. n toggled transient operation is in effect For example When Load receives one trigger signal Load current will switch between 5A and 10A TRG TRG Toggled Transient Operation Action 1 Press C Shift G Tram _ Setting LEVER A 5A LEVER B 10A Transition mode is PULSE 2 Press Cran Dto activate the transient mode 3 Press Shift Triggel switch to the current value of 10A 4 Press Shift Triggen switch between 5A and 10A 5 Press CShift ran again to stop the transient operation List Operation Users can use the front panel keypad or Power View 8500 PV 8500 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 21345 List count 1 List count 2 List sequence 29 Action 1 2 18 Press the button o amp OWOfD execute the input of Load in OFF state PressC Shift CMenu move cursor to the option of menu of CONFIG Press EMED into the next step menu move cursor to TRIGGER SOURCE Press CEnterand move cursor to IMMEDIATE lt DEFs setting trigger source mode is panel IMMEDIATE mode Press Enter to confirm Press S to the previous menu move cursor to LIST SET PressCEnter into the next step menu move cursor to EDIT LIST FILE Press Ete into the next step menu move cursor to CURRENT LIST s
27. nterface 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 Electronic load GPIB line IT E134 ISOLATED Serial IEEE 488 Controller E 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 Baud rate 4800 9600 19200 and 38400 are selectable default setting is 4800 Data bit 8 bit Stop bit 1 Parity None Parity None Start Bit 8 Data Bits Stop Bit 1 DB9 Interface Details A IS 35 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
28. on Over voltage over current overpower and over temperature protection Electronic load calibrate by Software Fan speed control by temperature VFD display Short circuit test 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 front panel keys The CC mode parameters are discussed in the following paragraphs CURRENT SETTING LOAD CURRENT 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 SE
29. ronic 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 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 CTriggeD key EXTERNAL Trigger signals from the TRIG
30. rrent or voltage press Enter to confirm 2 Press Shift 4CStore D set a store code at random press Enter to confirm 18 3 Press Shift 4 CRecall set the store code that you set before press Eeto 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
31. s C Shift_ G Tran set LEVEL A 5A pressCEnier set WIDTH A 3mS press Enten set LEVER B 10A pressCEnter set WIDTH B 2mS press Eeto confirm 3 Transition mode now is CONTINOUS pressCEnte to confirm 4 Press Shift Cran Dto activate the transient mode 5 Press Shift ran again to stop the transient operation 6 Press OOD 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 TWD nl Oms ps 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 Press Shift GTram set EVER A 5A LEVER B 10A WIDTH B 10mS Transition mode now is CONTINOUS 3 Press V till gt PULSE 4 Press Cente set transient mode is PULSE 5 Press Shift CTran Dto activate the transient mode 28 6 Press Shift Crigge to start another pulse Press Shift CrriggeD get more pulse 7 PressC Shift ran again to stop the transient operation 8 PressON Of 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 whe
32. tallation 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 IT E174 User s Guide Contains installation checkout and 20 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 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 The detachable power cord may be used as an emergency disconnecting device Remo
33. te rd iE esito er ey LO bete tec a ere ree 14 Uurcs race 14 A EET 15 ListpSralione unc cd I c d MC M M ES 15 Triggered Operation RM 16 Input Controlado 16 Short Ne on eS 16 INPC DI delete dede do dei dd dde de dedo dd 16 Sjoen Anale e T detente olaaa docto en ENE OTRA DON 16 Protection Features cete citer EEG EL CERE LX E EE EX EXE LE ERE ceda ERR E EE E 2L CER inca ciedad 17 Remote Sense PUTGCHOE a Ea AEn Ra Rd Iud Und REB ite at 18 Savingiand Recalling Setllij8 iioi ia stag ie eie ua iine atia a 18 Battery TSUN Gl NO 19 External Gontrol Signal citada 20 INSTALLATION 52 t G aaa INIM IM G LO 20 INSPECCIONES 20 Daiages sus ititetinitutipntietieftesenelenedenenadenetenadetenenatena latina 20 Cres 20 A NS 21 UA O M HEU UC cU D C LU aN 21 OWS A istic ie be b hohe ine int br ebrio b Sbe E 21 Trigger and Remote Sensing Connections essen enne nnne nnne nnne nennen 21 TURN ON CHECKOU Tied tu epu bo head adele io 22 A E EE OR 22 Checkout LT 22 In Gase Ole Trouble AS Heer ee iet eise ee A e tes reae ited ede ec genie eee eei AE 22 FRONT PANEL OPERATION A ber o e obe oe oso e e oet EE 23 a ifefo bred ola UN 23 JiSplayzsse nentur aset nl qu EI IM EDI DIM ME MILII I MIR NNI 24 AOTER EEE E EEEE ETEEN 24 FUNCION Keys oare a aaa a a ofds 24 laa c
34. tep by step as follows A CONST CURRENT 0A SHORT OFF READ BACK V 5 9V 6 4V 1S B CONST VOLTAGE 5V SHORT OFF READ BACK A 0 2054 0 245A 1S C CONST VOLTAGE 3V SHORT OFF READ BACK A 0 205A 0 245A 1S D CONST VOLTAGE 2V SHORT OFF READ BACK A 0 205A 0 245A 1S E CONST CURRENT 0A SHORT ON READ BACK A 0A 0 245A 1S 16 VFD displays SHORT TEST FILE which requests saving the files edited to EEPROM automatically testing files and LIST files use a common memory area and the area can contain 8 groups of automatic testing files for next usage Here the testing file could be saved in the first group pu and press CEnter ig confirm 17 When the edition of automatic testing file is finished pressCEnter two times to back the menu Taking out the Testing File 1 Press C Shift Menu Jt enter into menu VFD displays gt CONFIG 2 Press Y and move the menu to LIST SET 3 Press Enter to enter into submenu VFD displays gt MODE SET 4 Press Y and move the menu to CALL TEST FILE 5 Press Ete ang recall the file edited Automatic Testing After editing the automatic testing file the automatic testing could be carried out by the below steps 1 Press Shift Ckset D to enter into automatic testing VFD displays the name of current file NAME TEST FILE1 32 2 PressCEnter to observe the voltage and current we inputted and also can observe the step number of testing 3 Press Shift CiriggeDang begin to operate when the
35. uit 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 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 The Input On Off commands supersedes the mode commands and Short Test On Off commands Operation Range Work in the range of Rated Current Rated voltage and Rated Power The figure is as following JJ 5 c o a lt o c 0 e Rated power A 39V L1OA LAdNI Input current Rated current Operation mode change state Rated voltage C z Software Power Limit c 5 Software Current Limit r1 gt o m ed AE oe IMPR 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
36. ving the power cord from the ac input connector will disconnect ac input power to the unit D fs 3 China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 Trigger and Remote Sensing Connections A 4 pin connector and a quick disconnect mating plug 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 21 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 E 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 The electronic Load undergoes a self test when you First turn it on During self test all segments are briefly lit
37. 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 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 LU Y O LI If internal power components 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
38. will start working and 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 General Information Document Orientation This manual describes the operation of the IT8513B DC 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 PV 8500 software Calibration PC 8500 software Active driver PD 8500 OCX software Options an
39. y 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 E ERE 16 character display shows voltage and current measurements Rotary knob Power switch ON OFF Entry keys numeric keys Enter values Increasing or decreasing the setup values Menu commands Keypad Enable disable input Setup the current resistance and voltage modes Set and reset protection functions Scroll through front panel Input terminals The Rear Panel CE Cs CS co m Sarg E 3 COI CMT CSS ALT AO Gs AO GZZLS IP E 3 Pin IEC320 ac input connector Power code requires ground conductor E 4Pin Trigger and Remote sensing connectors E 9 Pin COM port interface connector E Power switch 110V 220V Front Panel Annunciator Indicates that the electronic load is waiting OFF power off Trigger Au 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 X 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
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