User's Manual
Contents
1. Fans running speed is determined by radiator temperature When temperature reaches 40 C fans start to work and intelligently adjust its speed with temperature variation Operation temperature O to 40 C Storage temperature 20 to 70 C Using condition Suitable for indoor use Allowable maximum humidity is 80 without condensation 25 User Manual ITECH T8500 USER MANUAL Chapter4 Functions and Characteristics This chapter elaborates on the functions and characteristics of electronic loads Contents following sections Local mode Remote mode Operation mode CC CV CR CW On Off control Four trigger function Transient mode List mode Save Recall VON function OCP test OPP test Battery test funtion Full protection function OCP OVP OTP OPP Reverse voltage Safe lock function Terminals function at the rear panel 4 1 Local mode Remote mode There are two types of control modes for IT8500 series products Local mode and Remote mode In remote mode you can operate the electronic loads through PC via communication cable optional While After power on electronic loads it defaults in local mode and all buttons are avaiable in this mode In remote control mode the keys on the front pannel can not work except local key Customers could through Local key to switch the control mode 4 2 Operation Mode There are four operation modes of IT8500 series products 1 Constant current mode CC 2 Constant voltage mode2. Eeprom Fail means EEPROM is not functional 2 Eeprom data lost means parameters of power on have been lost Reset them by pressing Shift 4 save 0 3 Cal data lost means calibration date have been lost 4 Eeprom Data lost means the system settings are lost reset them in system menu If you experience these error messages the instrument should be returned to ITECH for service AN WARNING The electronic load is shipped from factory with a power cord that has a plug appropriate for your location Your electronic load is equipped with 3 wire grounding type power cord the third conductor being ground The electronic load is grounded only when the power line cord is plugged into an appropriate receptacle Do not operate your power supply without adequate cabinet ground connection 2 1 3 Instrument won t turn on If the instrument won t turn on please check as follows 1 Check whether the power cord is connected well 15 User Manual N CO 4 ITECH T8500 USER MANUAL Please ensure the power cord is plugged into the back of the instrument the other end of the cord is plugged into a live AC power outlet and the power is on Check the power line voltage setting The line voltage is set to the proper value for your country 110VAC or 220VAC when the electronic load is shipped from facory Change the line voltage setting if it s not correct Check whether the fuse is ok If the instrument st
3. IT8500 USER MANUAL User s Manual DC Programmable Electronic Load Model IT8500plus series 1T8511 1T8512 1T8512B 1T8512C 11T8513C 1T8514B 1T8514C 1T8516C Copyright 2010 All Right Reserved Ver1 1 MAR 2013 IT8500 1 User Manual ITECH T8500 USER MANUAL CHAPTER INSPECTION AND INS TALELAT ION 5545 sss ess eee eee 7 11 INSPECTION usinas a cole eiii 7 no ig aal maa a ama 7 1 9 INSTALLATION E 7 1 3 1 Mounting Dimensions sss sss esse eee eee eee eee eee T 1 3 2 Adjustment of Handle T 11 TS RACK MOUNINO E 12 TA INPUT CONNEC HONS E 14 CHAPTER QUICIS TAR E 15 2 1 POWER ON SELFTESE ee 15 P N H o Kalo Tene 15 PREAS E E E o E E A E E E E E A N 15 2 1 3 Instrument WON TTUTM EE 15 2 2 FRONT PANNEL INTRODUCTION casas accio 17 2 3 REAR PANNEL INTRODUCTION EE 18 ZEN FE DISPLAY ANNUNCIATORS daa aiii 19 2O FRONT PANEL eebe 19 2 0 COMBINATION EE 20 CHAPTER G SFECIFICA NL 21 EE EE 21 3 2 SUPPLEMENTARY CHARACTERISTICS ss sss sonce essere neeo tidad ee 25 CHAPTER4 FUNCTIONS AND CHARACTERIG TICE 26 SEENEN 20 e GEN ei Ree 26 4 21 Constantcument MOGAE GE mee mitta t vatist koliini ae buds oo radar 26 4 2 2 Constant voltage Made CV ssepe rosana inline sans 27 4 2 3 Constant resistance mode CR esse 27 4 2 4 Constant power ue A UA 27 EREECHEN 28 Che RARO DN A 28 4 gt e gamma mu um mu A M Me i er RR eee 28 AS Y STEM MENG SYSTEM ist sesasistansid limane v in apart kammida Geese i nuia aata laim
4. for STOP CAP 7AH example 7AH then press Enter to confirm b press Enter to confirm SAVE BATT FILE 1 1 10 0 00W I 2 00A Off cc User Manual CURRENT 2 000A i STOP VOLT 0 al E C H IT8500 USER MANUAL o cut off Display Ta Shift 5 Battery set current 0 0000V 0 000A 2 Setdischarge current for example 2A a to confirm 999 999AH press Enter to confirm press Enter to confirm SAVE BATT FILE 1 1 10 0 00W I 2 00A Off cc 4 Any of the three conditions cut off Step Operation TE Display Press Shift 5 Battery set current range 0 0000V a CURRENT 2 00041 STOP VOLT 0 STOP CAP 999 999AH RANGE 0 00A 2 Setdischargecurrentforexample24 UNSEAT example 2V then press Enter to confirm example AH then press Enter to confirm example 3800S then press Enter to confirm gt the battery test to specified file 0 0000V 0 Ken SAVE BATT FILE 1 1 10 o Enter to confirm 0 0000V e 000A 0 00W 2 00A Off cc 5 go into battery test mode 1 Press shift 8 system enter into 0 0000V 0 000A sysmtem menu POWER ON BUZZER 2 Press right key select RUNMODE and 0 0000V 0 000A confirm with Enter button RUN lt NORMAL 3 Press direction key select 0 0000V 0 000A OCP TEST Press Enter to AA RUN lt BATTERY 4 Press Esc button to quit menu set 0 0000V 0 000A OS 0 000AH 6 Start battery test Press trigger to provide a signal to
5. 00W TRAN 0 and life Trig Turn on the load press P Shift Trigger to trigger Press anyone of CC CV CW CR button can quit the transient test if vou want to continue the test again please repeat 1 11 steps User Manual 44 ITECH 1T8500 USER MANUAL 5 2 2 Pulse transient operation DAD OO TWD P OMS TUM al TEIS TRIS Pulse Translent Operation Press Shift 2 Tran enter the transient operation setup menu Press Shift 2 Tran TRAN ON OFF move key to select e press Enter to confirm Preess G amp L to select MODE CONTINUOUS gt transient operation mode as JUESa the indicator lamp Trig will be lighted Enter to confirm Enter to confirm confirm Set level B press Enter to Level B 10 000A confirm 7 Set the time width press Enter IDTH 5S 0 00005 3600S to confirm ON OFF Open the transient test function LENA mentain on the on selection press Enter to confirm EM Then the VFD will display 10 0000V 0 0000A LN and GE 0 00W TRAN 0 Trig Turn on the load press gt Shift Trigger to trigger Press anyone of CC CV CW CR button will quit the transient test if you want to continue the test again please repeat 1 10 steps 45 User Manual E e C H 178500 USER MANUAL 5 2 3 Toggle transient operation Toggled Transient Operation TRG TRG Press Shift 2 Tran to enter the transient operation setup menu Steps Operation NED display P
6. Ea Kala o is Desc 48 CHAPTER6 COMMUNICATIONINTEREACEGS en nnne annae enne enn nana nn nnnannnn enn nana 53 6 1COMMUNICATION MODULES INTRUDUCTION xxe ee e ee 53 Ao ee we KEE 54 3 User Manual ITECH T8500 USER MANUAL 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 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 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 inadeguate 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
7. start battery test The discharing process will be auto terminated when stop conditions are reached User Manual 38 C C H 178500 USER MANUAL 7 Recall battery file Press shift Enter button to select programe file the panel displays RECALL BATTERY 1 Enter the file name 1 10 press Enter button to confirm 8 Pannel locked in case of error operations Press O shift on off Lock button to lock the panel In this mode only O shift and on off button is enabled According to the following steps to escape OPP mode Press O shift 8 system RUNMODE Eneter select NORMAL mode Enter 4 14 Protection features DC load protection features include OVP OCP OPP OTP reverse voltageprotection LRV RRV 4 14 1 Over Voltage Protection OVP If input voltage exceeds the voltage limit set by the user the DC load will turn the input OFF and the buzzer will sound The display will show 373 Operations to clear the OVP state Disconnect the instrument under test Press any key on the front panel the on the VFD will disappear then the DC load exits OVP protection state 4 14 2 Over Current Protection OCP The DC load includes both hardware and software over current protection features Hardware OCP maximum input current of the DC load will be limited at about 110 of the current range once the hardware OCP is activated the status register s OC bit will be set when the hardware OCP is removed the
8. to 1A by press CC and turned on the input Then increase the setting value to 2A with knob When customer turn off load and trun on again the setting value changes to 2A As explained above after the DC load is turned on again the setting value is 1A instead of 2A changed with knob SOURCE Set trigger mode MANUAL Def MANUAL Def Triggered from the O Shift Trigger key TRIGGER EXTERNAL Triggered from a TTL high signal at the trigger connector on rear panel Triggered from a serial bus command 5AH User Manual 28 KNOB a C C H 178500 USER MANUAL HOLD Receving a command 9DH MEMORY O indicates1 10 group 1 indicates 11 20group by parity of reasoning DISP TIMER Timer function DISPLAY ON Enable timer function OFF default Disable timer function RS 232 4800 8N 1 Baudrate 4800 data bit 8 none parity stop bit 1 9600 BN 1 Baudrate 9600 data bit 8 none parity stop bit 1 RS 232 19200 8N 1 Baudrate 19200 data bit 8 none parity stop bit 1 38400 BN 1 Baudrate 38400 data bit 8 none parity stop bit 1 ADDRESS ADDRESS 0 Set the instrument s address 0 31 Runing mode at power on NORMAL Normal mode BATTERY Default in battery test mode at power on RUNMODE PROG TEST Default in autotest mode at power on OCP TEST Default in OCP test mode at power on OPP TEST Default in OPP test mode at power on DEFAULT DEFAULT NO Do not return instrument to factory default settings yes Retrun instrument to facto
9. value RESET Reset the config menu RESET NOU Donotreset S 4 6 Trigger function 4 6 1 Trigger operation Triggering is used with the transient operation list operation and test function There are four types of triggers you can use for IT8500 products User Manual 30 ITECH T8500 USER MANUAL 4 6 2 Trigger source Manual An immediate trigger is created by pressing Shift Trigger on the front panel External TTL signal An external trigger is a TTL low signal applied to the trigger connection on the rear panel This TTI signal must last for more than 10us Bus The instrument will be triggered if command 5AH is sent via the communication interface Hold The instrument will be triggered if command 9DH is sent via the communication interface 4 7 Transient function The transient test allows switching between two different load values A common application is to test the dynamic characteristics of DC source There are three different types of transient operation continuous pulse toggled 4 7 1 Continuous mode In continuous transient operation the load iscontinuously switched between two load values An example is shown in the following figure Continuous Transient operation 4 7 2 Pulse mode In pulse operatrion the load operates at the A value that has been entered until a trigger is received At the trigger the load switches to the B value and stays at that level for the B timing value Then the load swit
10. wires Using remote sensing you can sense the voltage at the power supply s terminals effectively removing the effect of the voltage drop in the connection wire When using remote sensing the power displayed by the instrument includes both the power dissipated inside the instrument and the power dissipated in the leads from the power supply to the DC Load s input terminals Steps to enable remote sensing in the menu 1 Press Shift 9 key into the menu 2 VFD displays 40 ALS press Enter key to confirm 3 Press to choose gt SENSEI press Enter key to confirm User Manual 40 ITECH T8500 USER MANUAL 4 Press to choose gt been set and VFD display press Enter key to confirm then remote sense function has indicator Remote Sensing SENSE and SENSE are the remote sensing inputs By eliminating the effect of the inevitable voltage drop in the DC load leads remote sensing provides greater accuracy by allowing the DC load to regulate directly at the source s output terminals Wiring diagram for remote sensing 4 16 2 External Triggering EXTERNAL An external trigger is a TTL low signal applied to the Trigger connection on the back panel This TTL signal must last for more than 5 ms A trigger applied to this input can be used to change settings voltage current resistance toggle between settings in transient toggle mode or generate a pulse in pulse mode Operation to select the trigger source as
11. 3 In CV mode move the stepping cursor by pressing aL and then adjust the voltage by pressing A V To set voltage range follow the steps Steps Operation NED display RANGE 120 00V 1 Press CV then Shift CV 2 Set the voltage range press Enter 54 VM c 4 R 5511 L to confirm Press Esc to escape HIGH 30 000A Note When you set the voltage range to low range the resolution of voltage will rise 5 1 3 Constant power operation Set a value from 0 to upper limit of power User Manual 42 Kel TECH There are three ways to set the power value 1 In CW mode rotate Rotary konb 2 In CW mode input value through number key boards directly press Enter to confirm 3 In CW mode move the stepping cursor by pressing CP and then adjust the power by pressing A V 178500 USER MANUAL To set power range follow the steps Steps Operation VFD display e RANGE 150 00 1 Press CW then Shift CV 2 Set the power range press Enter to AE SA confirm 5 1 4 Constant resistance operation Allowed setting range is 0 050 to 75000 There are three ways to set the resistance value 1 In CR mode rotate Rotary knob 2 In CR mode input value through number key boards directly press Enter to confirm 3 In CR mode move the stepping cursor by pressing Al and then adjust the resistance by pressing A V To set resistance range follow the steps Steps Operation VFD display om RANGE 7500 00 d Pres
12. 82 5 mmW x 174 5mm H x 531 5mm D 9 User Manual IT8500 USER MANUAL T E C H IT8500 USER MANUAL ogs L ST9 unit minimeter Mm 1 3 2 Adjustment of handle Model 1T8511 1T8512 1T8512B IT8512C IT8513C has handle The following pictures demonstrate various ways to use the handle Please use proper strength to adjust the handle to enable itin a favorable location 11 User Manual T E C H IT8500 USER MANUAL EA CC Les ra Ii a Ls HOI The handle may be removed if desired The way to remove the handle Move the handle to depart it from the load s side by 2mm and then rotate the handle to the position as below pictures remove it F move Zmm then turn raund 0000000000 8400000000 Fmove mm than turn round 1 3 3 Rack mounting Model 1T8511 1T8512 1T8512B IT8512C IT8513C can be mounted into 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 E15C1 rack mount kit A rack mount kit for joining two half rack units is also available by using Option IT E151 Before you install IT E151 you should first remove the handle as described in 1 3 2 Then tear the tags on both sides User Manual 12 ITECH T8500 USER MANUAL Rack Installation 17 Elevation for Installation two electronic loads in a st
13. CV 3 Constant resistance mode CR 4 Constant power mode CW 4 2 1 Constant current mode CC In constant current mode the DC load will comsume a constant current regardless of the voltage at its terminals Load Setting current current Input voltage V CC mode Diagram 4 1 l V curve in CC mode User Manual 26 ITE C H IT8500 USER MANUAL 4 2 2 Constant voltage mode CV In constant voltage mode the DC load will cause a constant voltage to appear at its terminals V Setting voltage Input voltage Input current CV mode Diagram 4 2 l V curve in CV mode 4 2 3 Constant resistance mode CR In constant resistance mode the DC load will behave as a fixed resistance value As shown below the load linearly changes the current value with the rising of input voltage Slope is egual Load To the setting current resistance Input voltage V CR mode Diagram 4 3 l V curve in CR mode 4 2 4 Constant power mode CW In constant power mode the DC load will cause a constant power to be dissipated in the load As shown below the load current is decreasing with the rising of input voltage while power always maintain the setting value Setting power Input voltage V3 Load current GW mode Diagram 4 4 I V curve in CP mode 27 User Manual ITECH T8500 USER MANUAL 4 3 Input On Off control 4 3 1 On Off operation On Off button on the front panel is used to manually toggle the instru
14. Saving and recalling settings We can save some often used parameters in the non volatile memory including working mode voltage current value and so on IT8500plus series provide 100 non volatile registers They are divided into 10 Memory groups Group0 9 You can setitin the system menu Group0 means you can save and recall parameters in 0 10 registers Group1 User Manual 32 ITECH T8500 USER MANUAL means you can save and recall parameters in 11 20 registers Group2 Group9 can be concluded in the same manner Save and Recall operation For example the instrucment works in CC mode setting value is 1A Memory Group is 6 Save CC 1A in the 61th register and then recall Operation VFD Display DES Se 1 Set the parameters ok To save the instrument s settings 5 EEE D a register press Shift 4 Save Enter number 6 and E Then press Enter The setting is saved E 8949V 0 99994A 5 89W cc 1 000 Esc U EE 1 To recall the instrument s settings from a register press Shh Ue TA Shift Enter Recall La LU 2 Enter 1 Then the setting is recalled E 8949V 0 90994A M 5 89W cc 1 000A Note Saving operation will overwrite any values previously saved in that register Recalling operation will light the Enter You should press ESC to escape the recalling state before setting other parameters 4 10 VON function The DC load can be set to only turn on if the voltage is above a set value VON set under configure m
15. ama aja kama aa n ia 28 AS CONFIG MENU CONFIO EE 29 6 TRIGGER FUNCTION TETE 30 A e SL e re EE 30 4 6 2 TAHE e A A 31 AT EERSTEN 31 4 7 1 Continuous MOS mnt tai a aata 31 4 7 2 Pulse MOS nisa sa a alpi aan vai haa lii deste aaa daa ia im a 31 4 7 3 Toggled mode sss sese 32 4 8 LIST OPERATION doi ca 32 4 9 SAVING AND RECALLING SETTINGS ee e ee 32 4 10 VON FUNCTION EE 33 E PIC OPERATION A PES a stapes 39 c 12 OPE ORERAMON pi AA A E E E E AAE 36 a bg E KE 36 1 14 PROTECTION FEATURE Srecni a E a A 39 4 14 1 Over Voltage Protection OVH eee 39 414 2 Over Current Protection OCP EE 39 414 3 Over Power Protection OPP TT 39 4 14 4 Over Temperature Protection CT 40 4 14 5 Reverse voltage protection RN 40 e EU AI A 40 ASO THE TERMINALSON THE REAR PANEL T 40 416 1 Remote Sensing orar dai cae a Saka 40 User Manual 2 ITECH T8500 USER MANUAL 4 16 2 External Trtgderimg kA RENE 41 4 16 3 Current monitoring Montor nene enne 41 CHARTER BASI OPERA TON src rn a patna all iia ia 42 Sl OPERATION MODE sairia aa E a es hanna aitan tie 42 5 1 1 Constant current operation nene nnnan stare nene aad daO annae nan 42 5 1 2 Constant voltage operation EE 42 5 1 3 Constant power OperatiON EE 42 5 1 4 Constant resistance operation eee eee 43 5 2 TRANSIENT TES OPERA MON TT 43 EN Rn Te En EE e ee EE 44 2 2 PUSS Tansicht eee aU ON T 45 5 2 9 e ee WEEN EEN de elel EE 46 SFU TOPE e WE 46 e TEST FIE a cece tec nes es esse
16. andard 19 inch rack Caution Be careful not to grip your fingers due to too much strength when you take off the handle 13 User Manual Keil TECH 1 4 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 the following figure for the part number and ordering options SECHS China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 178500 USER MANUAL User Manual 14 ITECH IT8500 USER MANUAL Chapter2 Quick Starts 2 1 Power on selftest 2 1 1 Introduction A successful test process indicates that the instrucment meets the factory specifications and can be operated well 2 1 2 Selftest steps Power cord should be connected correctly Following is the detailed selftest steps About 1S later System Selftest System self check VFD The first line display actual voltage and 0 0000V 0 0000A current value About 1S later 0 00W CC 0 ONDA The second line display the actual OFF CC Aia power value and the setting current voltage power resistance value The third line display the input state operation mode IT85XX Ver 1 XX Display products information You can Press Shift 7 SN1 XXXXXXXXXXXXX press direction buttons to examine SN2 XXXXX product s model SN software version It may display following prompts when selftest fail 1
17. ating procedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met NOTE We suggest you operate the instrucment after half an hour warm machine operation to ensure the accuracy The content of this manual is subject to change without notice 9 User Manual ITECH T8500 USER MANUAL Introduction IT8500plus series DC electronic loads are single channel programmable electronic load which can provide multiple solutions according to the requirements of your design and test This series have international advanced functions and features e Highlight VFD display e Dynamic mode Up to 10KHZ e Measurement resolution 0 1mV 0 1mA e Measurement speed up to 40KHZ e Four operation mode CV Constant Voltage CC CR CW e Rotary knob making the operation more convenient e Remote Sense function e Battery test function e Memory capacity to save recall setting parameters 100 registers e Short circuit function e Intelligent fans e Build in Buzzer as alarm signal e Power off memory function Operational accessory 118511 118512 118512B 118512C IT8513C optional accessory IT E121 RS232 IT E122 USB IT E123 RS485 IT E151 Rack mount kit IT8514B IT8514C IT8516C optional accessory No the models equipped with RS232 USB interface Voltage Cu
18. ce RS232 interface 1T8514B IT8514C IT8516C Remote measurement and external trigger terminals USB interface 000656060 2 4 VFD Display annunciators Voltage range automatically ZI Constan power mode Auto Ve function is open Miralda sim he EIS ne keyboard is locked LUST LOAN ON is on Gin Shift button has been pressed 2 5 Front panel keys 0 Short Tran List Y s Save Bat tery og Pause OPP DD O Info Config Trigger Recall Lock o Blue green Shift button is a composite key gt Gray Local button is used to switch local and remote mode 19 User Manual C H IT8500 USER MANUAL eege Choose constant current mode Choose constant voltage mode CD ED Eiere selected value or setting CG Tumne DC Load ON or OFF OFF is high impedance state SA Soaupker 9 NV Swolidownkey 90 2 6 Combination keys Press Shift button first and then other keys to achieve all kinds functions in the following table 1 Short Turn short circuit on or off 2 Tran Start or stop transient condition O Set LIST operation parameters 3 List p p 4 Save Store the DC Load state in non volatile memory rs Turn on or off battery testing function 9 6 P Enter auto tese function L Info Display product s Model SN Version 8 System System menu setting ei W 9 Configy Configure menu setting Press this button E a E you need a pause when runing an auto test fi
19. ches back to the A value and stays there until another trigger is received TAD OO TAD pe UME DE TEIG Pulse Translent Operatlon T 31 User Manual ITECH T8500 USER MANUAL 4 7 3 Toggled mode In toggled transient operation the load starts at the stored parameters for the mode When a trigger is received the load switches to B value When another trigger is received the load switches to the A level lt stays at the A value until another trigger is received at which point it switches to the B value Here s an example Toggled Transient Operation TRG TRG 4 8 LIST operation List mode allows you to generate a complex current sequence Moreover the mode change can be synchronized with an internal or external signal to accomplish dynamic and precise test A list file includes following parameters file name step counts range 2 84 time width of single step 0 00005s 3600s step value and slope The edited list file can be saved in nonvolatile memory can be recalled easily The DC load provides 7 nonvolatile registers to save list files for recall later In list mode the DC load start to run the list file once receiving a trigger signal continue to run once receiving another trigger signal To illustrate the use of a list we ll create a list that runs the following constant current profile on a power supply Trigger 0 1102345 List count 1 re List count 2 gt List seguence 4 9
20. cond step s rise slope 01 0 e such as 1A uS press Enter to confirm as 5S Press Enter to confirm confirm such B 1 press Enter to confirm to select 51 71 press G LO e the Lie indicator will be light now press ESC Turn on the DC load press o Shift Trigger to trigger Press any function ksys if you want to quit list mode LIST ON CALL EDIT If you want to run a list file you ve saved please recall it first The steps is 47 User Manual IT8500 USER MANUAL Steps Operation VFD display Dress Shift 3 List make LIST ON CALL EDIT sure the 9 is flashing if not press Enter to select then press lb to select Dress Enter to confirm Select the list file Press Enter to RECALL LIST 1 LIST ON CALL EDIT 5 4 Test files Test files are a generalization of lists they let you generate a sequence of tests using different modes mode parameters and durations They are useful for executing a set of tests on a device then displaying whether the tests passed or failed We will illustrate how to use test files by a short example You can edit up to 10 groups of testing files each file has 10 steps it can edit up to 100 steps which can be saved in EEPROM address Suppose we have a small AC to DC power supply a wall wart and we want to setup an acceptance test for a number of these devices Our test will consist of two steps 1 Set the DC load to constant current mode to draw th
21. confirm third step e g 2S press 2 set start voltage Please refer UTO START 0 000 14 to function of auto start voltage Set stop condition STOP COMP FAILURE Function of Auto start voltage 1 Auto start 0V Auto test file start to run when receive a trigger signal by pressing O shift trigger or providing a external trigger signal 2 Auto start is not equal to 0V Take 2V as an example In this condition user only need to connect the charger to input termianls of E load The unit can auto start to run test file when detect a rising edge from 0 2V Auto start voltage is not suggested to be a big value 2V is suitable Ton Toff and Tpf P F relation SEQO1 SEQO2 OST pt Tont T ort 49 User Manual T E C H IT8500 USER MANUAL Tpf is the delay time for a step Set stop conditions COMP STOP COMP FAILURE means stop test when all the steps are completed FAILURE means stop test when the testing fails Press Enter key to confirm Select the test file to link if you d AAA AGUA like to The linked file must be saved before O stands for not linking to other files Press Enter key to confirm PROGRAM 1 Sequence PROGRAM 2 Sequence DD Ed PROGRAM 10 Sequence Save the edited files in SAVE PROGRAM 1 1 10 EEPROM you can save up to 10 groups of files e g please press 1 to save the edited file in group 1 and then press Enter to confirm Select a operation mode and TITA 18 then pres
22. e 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 person 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 the 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 capacitors and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not try to perform 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 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 oper
23. e rated current of 1 2A from the device The output voltage of the device at the rated current must be between 4 4V and 4 6V 2 Setthe DC load to constant voltage 3V The output current of the device is between 2A and 3A 3 When the device operates into a short the supplied current must be larger than 3 0 A RER OG Se eee NN 1 Press SER 6 Prog JAcTIVE 0987654321 0987654321 Press 1 2 and 3 Press Enter L MO 0987654YYY to confirm Select the step that needs to 22415 SSNS SS i KEFA pause during the test When it is paused press V can continue the test Step 3 short circuit testing SHORT NNNNNNNY21 press 3 And press Enter to confirm Set Ton for the first step if SEQ01 ON 2S you want to load on 25 press 2 and then press Enter to confirm Ton range 0 60S Set Toff for the first step if SEQ01 OFF 2S you want to load off 2S press User Manual E C H 178500 USER MANUAL a Toff range 0 60S O 60S e g 1S press 1 Set Ton for the second step if 301140 EPA you want to load 25 press 2 then press Enter to confirm Set Toff of the second step if 39515612 522 you need 2S press 2 and then press Enter to confirm Set testing delay time of the 54174212 E second step e g 1S press 1 Set Ton for the third step if SEQ03 ON 3S 11 you want to load on 35 press 3 then press Enter to confirm Set Toff of the third step if SEQ03 OFF 2S 12 you need 2S press 2 then press Enter to
24. em RUNMODE Enter select NORMAL mode Enter 4 13 Battery test IT8500plus series products test the battery capability in CC CW CR mode The test mode should be set first and then the discharge stop conditions There are three discharge stop conditions to be set for IT8500 plus series products When user only need to do battery testing in one or two stop conditions the other conditions should be set to the specified value STOP VOLT 0V STOP CAP 999 999AH STOP TIMER 999995 When the system checks the discharging time or battery voltage or capacity is egual to the setting stop value or under an insecurity state the battery test will stop and the E Load will turn off The battery voltage discharge current discharge time and discharged capability are displayed on the VFD while testing Take CC mode for example the operations are as below Voltage threshold cut off Step Operation Display Press Shift 5 Battery set current 0 0000V 0 000A 2 Set discharge currentfor example 2A L t press Enter to confirm 999 999AH press Enter to confirm press Enter to confirm SAVE BATT FILE 1 1 10 0 00W I 2 00A Off cc 2 Capacity threshold cut off Operation Display 1 Press Shift 5 Battery set current 0 0000V 0 000A KA Set discharge current for example 2A Set the stop voltage to OV then press Enter to confirm Set the stop capability
25. enu by pressing Shift 9 There are two types of VON function Living and Latch The following will have detailed description for the two types Note VON set is used to ensure an electronic system under test will not have power applied unless the supply voltage is above a certain value lf you have no such testing request do not set this value arbitrarily lf your instrument can not work normally for example set CC 1A after turn on the input while the current is still OA instead of setting value 1A then you should check VON set firstly lf VON set is not 0V then please modify to 0V ER User Manual 178500 USER MANUAL Von LOAD SIHE CURRENT t VON LIVING MODE In Living mode when power is applied to the DC load the voltage must rise above VON setting before the load draws current from the source the voltge below VON setting on the load s terminals the load will turn off input LOAD SINK CURRENT vile RISE RATE Aus VON LATCH MODE In Latch mode as before the load will turn on only when the voltage exceed VON setting but once on it will now stay on even if the voltage drops to zero User Manual 34 4 11 OCP operation OCP test process After input voltage reaches VON point the DC load start to draw a current from the source after a delay time The current value will increase by a certain step size at regular intervals Simultaneously the DC load will judge whether the input voltage is lower than OCP voltage y
26. eters Set the resistance range press RANGE 20 Enter to confirm voltage press Enter to confirm voltage press Enter to confirm 0 00W CR 2 0000 51 User Manual Keil TECH Go into autotest mode Operation Display on front pannel IT8500 USER MANUAL 1 Press shifty 8 system enter into 9 0000V 0 000A sysmtem menu POWER ON BUZZER 2 Press right key select RUNMODE and 0 0000V 0 000A confirm with Enter button RUN lt NORMAL 3 Press direction key to select 0 0000V 0 000A OCP TEST Press Enter to confirm RUN lt PROG TEST 4 Press Esc button to quit menu set 0 0000V 0 000A P01 According to the following steps to escape OPP mode Press O shift 8 system RUNMODE Eneter select NORMAL mode Enter 6 Start auto test file Press trigger to provide a signal to start auto test file The discharing process will be auto terminated when stop conditions are reached 7 Recall test file Press O shift Enter button to select programe file the panel displays RECALL PROGRAM 1 Enter the file name 1 10 press Enter button to confirm If you need a pause please press O Shift O pause Press V can continue the test User Manual 52 C C H 178500 USER MANUAL Chapter6 Communication interfaces DB9 in the rear panel of the DC load could connect with RS 232 through on TTL connector The following description may help you to know how to control the output of the DC
27. external Shift 8 system to enter the menu use AB to select il a Dress Enter and then select 3 9434 M8 Press ESC to exit the menu 4 16 3 Current monitoring Monitor Current monitoring terminal will output 0 10V analog signal to corresponding to 0 to full range of input current You can connect an external voltmeter or an oscilloscope to display the input current s changing 41 User Manual T E C H IT8500 USER MANUAL Chapter 5 Basic Operation 5 1 Operation mode 5 1 1 Constant current operation Set the current from 0 to the current limit There are three ways to set the current value 1 In CC mode rotate Rotary knob 2 In CC mode input value through number keys directly press Enter to confirm 3 In CC mode move the cursor to change the step value by pressing the ma and then adjust the current by pressing the A V To set current range follow the steps Step Operation VFD display Press CC and then RANGE 30 000 Shift CV Setup gt Set the current range press RANGE 10 000A Enter to confirm Press Esc to escape HIGH 120 00V Note when you set the current range to low range within 3A the resolution of current will rise 5 1 2 Constant voltage operation Set the voltage from 0 1V to the setting voltage limit There are three ways to change the voltage 1 In CV mode rotate Rotary knob 2 In CV mode input value through number key boards directly press Enter to confirm
28. face connector of computer for the communication IT E123 communication cable PC Instrument i PTR 4 El P wl rrr E Mm J sch bho RS485 pins 6 2 Communication with PC Before using the remote operation mode please make sure that the baud rate and communication address in the DC 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 Commnunication settings In order for the computer to communicate with the DC load both must be set to the same RS 232 settings These communication settings are 1 Address the range is from O to 31 default setting is O 2 Baud rate 4800 9600 19200 and 38400 are selectable default setting is 9600 Refer to chaptor 1 7 3 Data bit 8 bit 4 Stop bit 1 5 Parity None Even Odd default is None refer to chaptor1 7 Parity None Start Bit 8 Data Bits Stop Bit User Manual 54 DB9 serial port 55 User Manual IT8500 USER MANUAL Support process If you have a problem follow these steps 1 Check the documentation that come with the product 2 Visit the ITECH online service Web site is www itechate com ITECH is avaliable to all ITECH customers It is the fastest source for up to date product information and expert assistance and includes the following features Fast access to email AE Software and driver updates for the prod
29. ill won t turn on remove the power cord from the instrument Open the fuse container on the rear panel and check the fuse for continuity Please refer 4 to take down the fuse If the fuse is an open circuit replace it with the proper fuse indicated in the following table wot emer eee V AC operation VAC operation IT8514C T1 25A 250V T2 5A 250V IT8516C T2 5A 250V TSA 250V The method of replacing fuse Use a flat bladed screwdriver to open the small plastic cover under the AC input connector on the rear panel of the load then you can see the fuse Please use the matching fuse figure showing the fuse location User Manual 16 bel TECH 2 2 Front pannel introduction Front panle of 1T8511 1T8512 1T8512B IT8512C IT8513C ees eel H hie 4 6 006 Es SIS E 9998 83 178500 USER MANUAL ITECH T8500 USER MANUAL Power switch VFD display Composite key and Local key Number key Set the parameters value Achieve the menu s function by key combination Function key Set the operation mode Control the input state On Off Direction function Rotary knob Input terminal AONO YA 2 3 Rear Pannel Introduction Rear panel of IT8511 IT8512 IT8512B IT8512C IT8513C TOI FAGO User Manual 18 Rear panel of IT8516C Fan Power swith 110V 220V Power input socket I monitor DB9 COM interfa
30. imum operation 0 6V at 3A 3V at 15A 0 25V at 6A 2 5V at 60A E range 0 50V 0 500V 0 18V 0 120V CV mode OVA 0 0 0 0 0 05 0 02 FS H 0 05 nae AS OS 02 FS 0 05 0 025 FS 0 15A 0 60A CC mode om im im Im 0 0 0 0 0 S 0 05 0 05 FS 00 05 unn 05 F 0 05 GE 05 FS 0 05 OL 05 FS 0 30 100 100 E SE 100 7 5KQ CR mode 16bit CW mode 0 1 0 1 FS 0 1 0 1 FS Dynamic mode Dynamic mode Rising decending 0 0001 0 3A uS 0 001 0 8A uS 0 0001 0 3A uS 0 001 1 2A uS slope Measuring range 0 50V 0 500V 0 18V 0 120V Readback resolution Im mV 1 TA mv mV 1 Im voltage 0 OTSAS 025 FS 0 025 0 a 025 0 TOSS ORFS 025 FS accuracy Y 3 A current accuracy 0 05 0 05 FS 0 05 0 05 FS 300W 300W rea accuracy 0 1 0 1 FS 0 1 0 1 FS Protection range User Manual 22 IT8500 USER MANUAL lad ES 6 65 60A voltage KAEL E impendance 214 5mm 88 2mm 354 6mm 214 5mm 88 2mm 354 6mm IT8513C IT8514C Input voltage 0 120V 0 120V EST current 0 12A 0 120A 0 24A 0 240A Rated value Input power 600 W 1500W 0 40 Minimum operation 0 2V at 12A 2V at 120A 0 25V at 24A 2 5V at 240A a OU moale 0 05 0 025 FS 0 05 0 02 FS 0 05 0 025 FS HOTO IRFS resolution 16bit 16bit 0 01 0 08S 2 0 01 0 0008S 0 02 0 08S 2 0 02 0 0008S range 600W 1500W CW mode 10mW Dynamic mode CC mode 11 8 T2 100uS 3600S Re
31. le WS Trigger Cause an immediate trigger CC OCP Enter E as EEE test function cwSetup Set detailed parameters in CC CV CW CRmode CW OPP Enter OPP test function Enter Recall Recall the DC Load state from non volatile memory On Off Lock Key lock function User Manual 20 C H 178500 USER MANUAL Chapter3 Specifications 3 1 Specifications Model HIRR TBI Rated valus 0 40 C Minimum operation 0 14V at 3A 1 4V at 30A 0 12V at 3A 1 2V at 30A Ee range 0 18V 0 120V 0 18V 0 120V CV mode CI mW 0 30A O CC mode resolution mA 1mA EN omg 1mA ma 0 0 0 0 0 0 05 0 05 FS SA 0 05 aer 05 F 0 05 GE 05 FS 0 05 Erem 05 ES 0 050 100 100 7 5KQ a 100 100 7 5KQ CR mode mode es oo AOMW O AOMW S 0 1 0 1 FS 0 1 0 1 FS Dynamic mode Dynamic mode Rising decending 0 0001 0 3A uS 0 001 1 5A uS 0 0001 0 3A uS 0 001 1 5A uS slope Measuring range 0 18V 0 120V 0 18V 0 120V Readback resolution Dim 1mV mv Dim 1mV Im voltage 0 semi Ze 025 FS 0 AAA 025 0 ech een 025 0 OTSAS 025 FS accuracy E FS 2 current accuracy 0 05 0 05 FS 0 05 0 05 FS 150 300W Ke accuracy 0 1 0 1 FS 0 1 0 1 FS Protection range oe emm mm SO Specification 21 User Manual C H IT8500 USER MANUAL current a 3 3 3A EE 3 3 3A 33 30A impendance 214 5mm 88 2mm 354 6mm 214 5mm 88 2mm 354 6mm Rated valus 0 40 C Min
32. load through PC WARNING Don t connect the DC load s DB9 connector to a standard RS232 instrument doing so may damage the instrument 6 1Communication modules intruduction IT E121 communication module The DB9 interface connector on the rear panel of the DC load is TTL voltage level you can use the communication module IT E121 and an a standard RS232 extension cable to connect the DB9 interface connector of the DC load and the RS 232 interface connector of computer for the communication IT E121 communication cable PC Instrument TAN SIINOBLIST 49311 ER IT E122 communication module The DB9 interface connector on the rear panel of the DC load is TTL voltage level IT E122 has a USB interface on one end you can use IT E122 and an a standard USB extension cable to connect the DB9 interface connector of the DC load and the USB interface connector of computer for the communication IT E122 communication cable PC LOAD instrument Ta eeng A ges KM we SC aal FF lt ff 1 m PA ho Do User Manual ITECH T8500 USER MANUAL IT E123 communication module The DB9 interface connector on the rear panel of the DC load is TTL voltage level The interface on both side port of IT E123 are DB9 interface and RS485 interface you can use the communication module IT E123 and an a standard RS485 RS232 conversion cable to connect the DB9 interface connector of the DC load and the RS 232 inter
33. ment between its set mode and an infinite impedance state e control input on and off On Off button lighted indicates the load input is on meanwhile the e Ja indicator will disappear 4 3 2 Short Short circuit simulation and short circuit current measuremen you may press O Shift 1 short botton to emulate a short state lt can be used to check whether the tested instrument s short protection is avaiable In short mode the DC load will draw maximum current from the DC supply in any of the four operation modes CC CV CW or CR In CC CV or CR mode you may press Shift 1 short to stop short The DC load will return to its previous operation However in CW mode the short current will continue to be drawn To stop the short you must press the On Off key after you press Shift 1 short When emulating a Short in CC CW or CR mode the maximum allowable short current is equal to the 110 of current range 4 4 System menu System Press Shift 8 System to enter the system menu POWER ON Power on state of instrument RST default Do not remember state in SAVE 0 Customer POWER ON ju can save a often used data in SAVE 0 to recall when power on the DC load next time SAVO Remember state in SAVE 0 E BUZZER ON default Enable audible beep when key is pressed No sound when key is pressed KNOB UPDATE default The value modified with knob during operation will be saved after load is off For example the DC load is set
34. nput voltage has reached VON point power will begin to work after a delay time The power value will increase by a step size at regular intervals Simultaneously the DC load will judge wether the input voltage is lower than OPP voltage you need to set If it is then the present current value will be compared to see if it is in the current range you ve set in this range the OPP test will Pass or fail On the contrary the power will continue to increase within the cut off current range And then compare OPP voltage with input voltage too To start a OPP test press Shift Trigger Press Shift CW OPP to enter OPP test operation OPP TEST RUN STOP Run OPP test file OPP TEST ee ge Set the power on mode to be OPP test mode 1 Press shift 8 system enter into 0 0000V 0 000A sysmtem menu POWER ON BUZZER 2 Press right key select RUNMODE and 0 0000V 0 000A confirm with Enter button RUN lt NORMAL 3 Press direction key to select 0 0000V 0 000A OCP TEST Press Enter to confirm RUN lt OPP TEST 4 Press Esc button to quit the set 0 0000V 0 000A STOP 0 000A After above steps press Trigger button to run OPP test file Recall OPP file Press O shift Enter button to select programe file the panel displays CALL OPP FILE 1 Enter the file name 1 10 press Enter button to confirm User Manual 36 ITECH 1T8500 USER MANUAL According to the following steps to escape OPP mode press O shift 8 syst
35. ou ve set lf it is then the present current value will be compared to see if it is in the current range you ve set in this range the OCP test will Pass or fail On the contrary the DC load will continue to increase drawing current and compare the voltage To start an OCP test press Shift Trigger Press Shif CC OCP to enter OCP operation OCP TEST 1 VON LEVEL 0 000V Set Voltage threshold 2 VON DELAY 0 00S After delay certain time the DC load starts to draw current 3 RANGE 3 000A Set current range 4 START 0 1000A Set start current 8 OCP VOLT 2 000V Set OVP value Set the power on mode to be OCP test mode 1 Press shifty 8 system enter into 0 0000V 0 000A sysmtem menu POWER ON BUZZER 2 Press right key select RUNMODE and 0 0000V 0 000A confirm with Enter button RUN lt NORMAL 3 Press direction key to select 0 0000V 0 000A OCP TEST Press Enter to confirm RUN lt OCP TEST 4 Press Esc button to quit the set 0 0000V 0 000A STOP 0 000A After above steps press Trigger button to run ocp test file Recall OCP file Press O shift Enter button to select programe file the panel displays CALL OCP FILE 1 Enter the file name 1 10 press Enter button to confirm According to the following steps to escape OCP mode press O shift 8 system RUNMODE Enter select NORMAL mode Enter 30 User Manual 4 12 OPP operation OPP test process When the i
36. rature Protection OTP If internal temperature exceeds safety limits 85 C 185 F the Over temperature circuitry will be activated The DC Load will turn off the input the buzzer will sound and the display will show 2592 Operations to clear the OTP state When the DC load temperature drops to the protecting point press any key on the front panel the displayed on the front panel will disappear the DC load exits OTP protection state 4 14 5 Reverse voltage protection LRV This feature protects the DC load in case the DC input terminals are connected to a power source with reversed polarity If a reverse voltage condition is detected the buzzer will sound and EWT will be displayed on the VFD Operations to clear the reverse voltage state Check whether the connection is reversed if so disconnect the power source 4 15 Key Lock Function Press Shift On Off Lock key to lock the front panel keys VFD will display a label In this state setting values can not be modified woriking mode can not be changed Press O Shift On Off Lock again will disable this function 4 16 The terminals on the rear panel 4 16 1 Remote sensing Remote sensing is used to counteract the effect of lead resistance For example if you connect a power supply to the DC Load the voltage at the power supply s terminals will not be the same as the voltage at the DC Load s terminals if there is a current flowing because of the finite resistance from the
37. ress Shift 2 Tran move key to select W press Enter to confirm Set transient operation mode as 10 CONTINUOUS gt WJA the indicator lamp seet will RB lighted NENE the rising P SOpe press press 51 Dap KEE to weit DE Enter to confirm confirm confirm E ce function press Enter to confirm HES the VFD will display AUN LN and als 0 00W TRAN 0 Trig Turn on the load press P Shift Trigger to trigger Press anyone of CC CV CW CR button will quit the transient test if you want to continue the test again please repeat 1 9 steps 5 3 List operation Before run a list file you should edit the list file firstly and save it in a non volatile memory The following examples will help you understand the function well In the example the output voltage and current are 10V and 3A and the DC load is in CC mode User Manual 46 178500 USER MANUAL Trigger 0 1 2i SAS e List count 1 pe List count 2 gt List seguence Steps Operation VFD display Press Shift 3 List make CALL sure the 9 is flashing if not press Enter to select Si 7 then press i Ki key to select press Enter to confirm 2 Setthe current range the current range DD MS RANGE 3A keys and press Enter to confirm Enter to confirm press Enter to confirm ER MEMES 58 Press Enter to confirm Set the second step s current STEP 01 2A l such as 1A press Enter to confirm Set the se
38. rrent Communication interface IT8511 120V 150W IT8512 120V 300W IT8512B 500V 300W User Manual 6 ITECH T8500 USER MANUAL Chapter1 Inspection and Installation 1 1 Inspection Make sure that you have received the following compontents in the table below one instrucment for example If anything has been lost please contact with your franchiser item Part Number IT E171 One power IT E172 You can choose different power cord cord IT E173 according to your region IT E174 One user s Installation operation self test information manual Calibration report One test report 1 2 Cleaning Do not clean any internal parts of the electronic loads casually lf you need to clean the outside cover please use a dry cloth or moistish cloth to wipe N Caution Cut the power off before cleaning 1 3 Installation The following outside drawing has marked the dimension information The instrucment should be fixed in a ventilation and reasonable size of space 1 3 1 Mounting Dimensions 118511 118512 118512B 1T18512C Dimension 214 5 mmW x 88 2mm H x 354 6mm D Refer to the following dimension drawing 7 User Manual IT8500 USER MANUAL unit minimeter mm unit minimeter mm IT8514B IT8514C Dimension 436 5 mmW x 88 2mm H x 463 5mm D TOL o 888384 4 D 0000 DO ED M o COS 4 User Manual 8 178500 USER MANUAL unit minimeter Mm IT8516C Dimension 4
39. ry default settings 4 5 Config menu Config Press Shift 9 Config to enter the menus Set hardware power protection MAX POWER 150 00W Set hardware OPP value A LIMIT Set software current protecting cf ALIMIT sd LIMIT ON Enable ees SIS SS over current protection PROTECT function A LIM POIN 30 000A Set the software OCP level A LIM DELAY 3S Set the OCP delay time Disable the software OCP funtion Set software power protecting State P LIM POIN 150 00W Set the software OPP level 29 User Manual C C H IT8500 USER MANUAL P LIM DELAY 3S Set the OPP delay time TIMER Set load on timer LOAD TIMER ATT LOAD TIMER 10 0S Set the load on time 0 1S 9999 9S OFF Disable load on timer V RANGE Voltage auto rangefuntion Enable voltage auto range function Disable voltage auto range function FILTER Set the filter parameter MEASURE FILTER CT 2M4 Filter count set range 2 16 Ta ON ET V1 TIME VOLT1 0 000V TIME V2 TIME VOLT2 120 00V Set the start time to measure the voltage rise fall time Set the end time to measure the voltage rise fall time EE CR LED Imitate LED in CR mode CR LED Open the function in CR mode press shift CV to set Vd value Disenable the function ja E A RE Disable remote sense function VON s lt the load s VON point vow VON point living state VON VON POINT 0 10V Set the VON value LATCH VON point latch state ON OFF VON POINT 0 10V Set the VON
40. s Shift CV to set ARN CC 1 000A related parameters Edit the three steps of the test file details refer to below procedure 19 After all the steps are set Press ESC to exit setup and then press O Shift 4 to save You need to recall the test file before runing it Set the steps of a test file in the example CC mode 1 2A voltage range 4 4V 4 6V Step _ Operation VFD display 1 Press CC button and then P Shift CV Setup to enter the setting interface Set the current range press RANGE 1 2A o 50 User Manual C H IT8500 USER MANUAL E fcc r press Enter to confirm press Enter to confirm con press Enter to confirm press Enter to confirm 0000V 0 000A Finish the setup 0 00W CC 0 000A CV mode 3V current range 2A 3A Steps Operation NED degen Press CV button press Shift CV to set related parameters 2 Set the voltage range press RR Enter to confirm EM set the upper limit of HE current press Enter to confirm EE current press Enter to confirm 0 00W CV 10V The CW and CR is set as the same way CW mode Steps Operation VFD display Press CW button press P Shift CV to set related parameters Set the power range press RANGE 1 00W Enter to confirm voltage press Enter to confirm vonage press Enter to confirm 0 00W CW 1 00W CR mode Steps Operation VFD display Press CR button RANGE 7500 00 press P Shift CV Setup to set related param
41. s 1 uS 100uS 3600S Res 1 uS 10uS 100ppm 10uS 100ppm ecending slope Measuring range AA nan accuracy 0 2 0 2 FS 0 2 0 2 FS Protection range opp 620W 1550W 23 User Manual Mel T E C H IT8500 USER MANUAL Specification current CC 130 120A 26 7 24A 267 240A voltage CV m mai E ee eg 50 impendance Dimension 214 5mm 88 2mm 453 5mm 436 5mm 88 2mm 463 5mm Model Ir TBRBIABT IT85t6c Rated value 0 40 Minimum operation 0 25V at 6A 2 5V at 60A 0 15V at 24A 1 5V at 240A voltage CV mode 0 05 0 025 FS 0 05 0 025 FS range accuracy 0 05 0 05 FS 0 1 0 1 FS KA a CR mode CW mode Dynamic mode CC mode T1 T2 100uS 3600S Res 1 uS 120uS 3600S Res 1 uS 10uS 100ppm 10uS 100ppm 0 001 0 15A uS 0 01 0 8A uS 0 001 0 3A uS 0 01 2 8A uS decending slope Measuring range Rai GG Pa 0 025 0 025 FS pm 0 1 0 196FS g accuracy 0 2 0 2 FS User Manual 24 IT8500 USER MANUAL Specification DS current CC 6 7 6A rea os ms voltage as Ae v E M 150KO 150KO IN M 436 5mm 88 2mm 463 5mm 436 5mm 176mm 463 5mm 3 2 Supplementary characteristics Memory capacity 100 registeres Suggested calibration freguency Once a year AC input level A transfer switch is selectable on the rear panel Option Opt 1 220V 10 50Hz 60Hz Option Opt 2 110V 10 50Hz 60Hz Cooling type Intelligent fans Fans working principle
42. s CR then Shift CV Setup 2 Set the resistance range press Enter to Wal leis Ue confirm Press Esc to escape HIGH 120 0V 5 2 Transient test operation Transient operation enables the DC load to periodically switch between two levels To edit a transient test file related parameters need to be set A level B level time width only in pulse mode frequency duty and running mode Continuous Pulse Toggled If in CC dynamic mode user can set current rising and falling slope additionally Following is an example to illustrate the three transient operations 43 User Manual ITECH 1T8500 USER MANUAL 5 2 1 Continuous transient operation Continuous Transient Operation Press O Shift 2 Tran to enter the transient operation setup menu VED display Press Shift 2 Tran TRAN ON OFF move key to select SN press Enter to confirm Preess le to select MODE CONTINUOUS gt transient operation mode as O10 141501010 the indicator lamp Trig will be lighted Enter to confirm Set the descending slope press Enter to confirm Set level A press Enter to confirm Steps Set level B press Enter to LEVEL B 10A confirm gt Set the frequency press Enter gisele les IA AMEN P to confirm Set the dutyfactor press Enter MIME E to confirm Open the transient test TRAN ON OFF function mentain on the on selection press Enter to confirm Then the VFD will display 10 0000V 0 00006 TRAN 0
43. status register s OC bit will be reset Hardware over current protection won t change the DC load s On Off state Software OCP users can setthe DC load s software OCP value steps Shift 9 ProtectsAlimit set ON Apoint set OCP current value Adelay set delay time before alarm When the software OCP function is actived the DC load will automatically turn off VFD displays 9 94 Operations to clear the OCP state Disconnect the instrument under test Press any key on the front panel the displayed on the VFD will disappear the DC load exits OCP protection state 4 14 3 Over Power Protection OPP The DC load includes both hardware and software OPP features Hardware OPP the DC load allows user to set a power protection limit in hardware which will limit the power in the range you set when the OPP occur The hardware OPP protection will not change the ON OFF state of the the DC load Software OPP users can set the DC load s software OPP value steps Shift 9 lt loa BT de hiset OPP power value s BT HS 9 94 set alarm delay 39 User Manual ITECH T8500 USER MANUAL If the the DC load s power value reach OPP limit and after the delay time the DC load will automatically turned off VFD will display Jd Operations to clear the OPP state Disconnect the instrument under test Press any key on the front panel the 5533 displayed on the VFD will disappear the DC load exits OPP protection state 4 14 4 Over Tempe
44. uct Call ITECH support line 4006 025 000 Ibu User Manual 56
45. warranty Warranty options product maintenance agreements and customer assistance agreements are also avallable 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 in a pollution degree 2 environment It is designed to operate at a maximum relative humidity of 80 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 User Manual 4 ITECH T8500 USER MANUAL electrical ground The instrument must be connected to the AC power 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 protectiv
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