IT8813-16 user manual
Contents
1.2. 0 a T 05 accuracy FS FS FS 0 sa 0 240A 0 10A 0 100A resolution mA 10mA mmh 10m paga 0 wa 05 FS 0 i 05 F 0 zedinn 05 F 0 saora 05 F accuracy 0 nas ni 5KQ 0 S 100 100 d 5KQ CC mode CR mode 16bit accuracy 0 2 0 2 FS 0 2 0 2 FS Dynamic mode CC mode T1 amp T2 20uS 3600S Res 1 uS 20uS 3600S Res 1 uS Dynamic 5 uS 100ppm 5 uS 100ppm mode 0 001 0 25A uS 0 01 2 5A uS 0 001 0 1A uS 0 01 1A uS time Measurement range 0 18V 0 120V 0 50V 0 500V Readback m mv Om voltage 0 025 0 025 0 Lei ene 025 0 NANA LANA 025 0 TORS accuracy FS FS FS _ range 0 24A 24A 0 240A 010A 10A 0 100A ET e Protection range User Manual 16 ITECH IT8800 USER MANUAL _ OPP 3050W 2550W 26 4A 264A Sun OVP 130V 530V OTP 85C 95 C Specification Tan 26 4A 24A 264A 240A 11 10A 110 1004 Short Voltage CV Resistance CR 7 wi terminal wi Rated value 0 40 C Minmum setting 0 12V 12A 1 2V 120A 0 15V 24A 1 5V 240A _ range 0 18V 0 120V 0 18V 0 150V CV mode omv m o KM 05 F TE AG ech er FS FS FS 0 ta 0 120A 0 24A 0 240A CC mode 0 05 0 1 FS 0 05 0 1 FS 0 05 0 1 FS 0 05 0 1 FS Moor a R score CR mode Dynamic mode CC mode Dynamic mode 0 001 0 25A uS 0 01 2 5A uS 0 001 0 25A uS 0 01 2 5A uS time Measurement range 0 18V ae 120V 0
3. IT8800 USER MANUAL User s Manual DC programmal electronic load Model IT8813 I1T8814 IT8816 IT8813B IT8814B IT8816B IT8813C IT8814C IT8816C aie e ECH et e 4 dE gen es IN u Co i Oe am Kr yang Copyright 2010 All Right Reserved Ver1 1 MAY 2013 IT8800 701 1 User Manual T E C H IT8800 USER MANUAL DIRECTOTRY CHAPTER1 INSPECTION AND INSTALLATION 7 1 1 INSPECTION aaa T 1 2 er e 7 1 FACCESSORY EE 7 1 4 INSTALLATIONSITE i 7 TAT Mounting DIMENSIONS ARR 7 1 4 2 INPUT CONNECTIONS arenge E ea aaa a a aaa ma a aaa E E KENE Ka ein 6 CHAPTER 2 QUICK START iii 9 2 1 POWER ON SELFTEST narra 9 2 1 1 Introduction aa 9 2 12 OCIMES US ECOS ln 9 2 1 3 If the electronic load can t power on i 9 2 2 FRONT PANEL INTRODUCTION rara 10 2 3REAR PANEL INTRODUCTION arara 11 2 4 VFD STATUS INDICATOR LAMP DESCRIPTION 0cececececececeeececececeeeaeaeeeececeatavaneeeennees 11 2 5 KEY BOARD DESCRIPTION i 12 2 6 COMBINATION KEY 13 CHAPTERS TECHNICAL SPECIFICATION EE 14 3 1 MAIN TECHNICAL SPECIFICATION rara 14 3 2 SUPPLEMENTARY CHARACTERISTIO iesse aset ae ee cansadas il 19 CHAPTER4 FUNCTION AND CHARACTERISTIC e eaaa eaaa cececececececececeeeeeeeeeeeenees 20 4 1LOCAL REMOTE OPERATION Bd Le e LEE 20 4 2 OPERATION MODES EE 20 4 2 1Constant current mode CC 20 4 2 2 Constant voltage Mode C
4. This function protects the load module in case the input DC voltage lines are connected with wrong polarity Once in reverse connection condition input will be immediately turned off buzzer alarm status registers LRV RRV and VF bits will be set main frame screen displays LRV RRV they will remain until they are reset In this condition the 8 pins connector s VF pin will output a high level you can disconnect the power supply via this signal Operations to clear the reverse voltage state Check whether the connection is reversed if so disconnect the object to be meaured 4 15 Key Lock Function Press ED number 8 key to lock the front panel keys VFD will display lable In this state setting values can not be modified woriking mode can not be changed press number 8 key again will disable this function 4 16 rear panel interfaces introduction 4 16 1 Remote sense function When work in CC CV CR and CP mode if load consumes biggish current it will cause one depressed voltage in the connection line between tested machine and terminals of Load In order to assure testing precision Load provides one remote testing terminals in the rear panel Users could test the output terminals voltage of tested machine through it Users should set the Load in REMOTE mode before using the function Remote Sensing SENSE and SENSE are the remote sensing inputs By eliminating the effect of the inevitable voltage drop in the
5. each file has 10 steps it can edit up to 100 files which can be saved in EEPROM address SE a automatical test file VED display Ei PROGRAM 5 Press direction key to move menu to gt EDIT PROGRAM EDIT PROGRAM to edit testing files Active Sequence 0987654321 Select the steps needed to test if you EDIT PROGRAM want to test 4 steps please press in Active Sequence 09876543XX order 1 2 3 4 0 stands for the tenth step If you want to cancel a step press again the numeric keys you want to cancel Press to confirm In the 4 steps if you want to suspend EDIT PROGRAM e g you want to suspend step 2 press Pause Sequence 0000000oXX numeric key 2 press EB to confirm Edit the 1 step of the 2 steps EDIT PROGRAM determine whether need short circuit Short testing for example if step2 needs Sequence ooo00000XX short circuit testing press number 2 press EB to confirm Set with load time if you want to load EDIT PROGRAM 2S press numeric key 2 then press SEQ01 On Time 2S E ID to confirm Set unloading time if you need 25 EDIT PROGRAM press numeric key 2 then press SEQ01 Off Time 2S GED to confirm i EDIT PROGRAM e Set testing delay time e g 1S press SEQ01 P F Delay Time 1S User Manual 40 ISS C C H IT8800 USER MANUAL numeric key 1 Tpf is testing delay time Set with load time of the second step if EDIT PROGRAM you want to load 2S press numeric key SEQ02 On Time 2S 2 then press G
6. 18V 0 120V Readback resolution Im mV 10m Dim 0 Dim 0 mV Im mV voltage e NANA zer 0 025 0 025 0 025 0 025 0 ata y FS FS FS ES 0 05 0 1 FS 0 05 0 1 FS Gegen i 0 2 0 2 FS 17 User Manual T E C H IT8800 USER MANUAL Protection range oe __ 760W 13 2A 132A 26 4A 264A 130V 130V Specification ye 13 2 12A 132 120A 26 4 24A 264 240A Voltage Resistance o DI n wi terminal wi Model O IT8816C Voltage 0 120V Rated value 0 48A 0 480A 0 40 C 3000W Minmum setting 0 2V 48A 2V480A voltage geg a 0 010 100 10Q 7 5KO CR mode 16bit 0 01 0 08S 0 01 0 0008S 3000W CW mode 100m 0 2 0 2 FS Dynamic mode aula Measurement range accurac 0 025 0 025 FS 0 025 0 025 FS y H Readback current 0 48A 0 480A User Manual 18 ITECH IT8800 USER MANUAL resolution 1mA 10mA accuracy 0 05 0 1 FS range 3000W Readback power resolution 100mW accuracy 0 2 0 2 FS Protection range Specification Resistance CR 4m0 Input terminal 300KQ impedence Current CC 52 8 48A 528 480A Short Voltage CV ov 3 2 Supplementary characteristic Memory capacity 100 groups Suggested calibration frequency 1time year AC power input scale selectable by switch on the rear panel Option Opt 1 220V 10 50Hz 60Hz Option Opt 2 110V 10 50Hz 60Hz Cooling method Fans Fan contr
7. 2 60W cc 1 000A Note You should combine the Memory function in the system menu with Recall function to help you recall the saved parameters 21 User Manual T E C H IT8800 USER MANUAL Memory function When you want to recall the data saved in the memory you should set the memory group in the system menu first Group0 means you can recall datas saved in 0 10 groups Group1 means you can recall datas saved in 11 20 groups Group2 Group9 can be concluded in the same manner 4 10 VON function Press UL number 9 to enter configure menu you can set voltage value Von Voff to control the input state on off for electronic load When the input voltage reaches the Von value the load s input state is on When the input voltage reaches the Voff value the load s input state is off There is two types of Von working modes Living and Latch When you select Living that means working in living state when you select Latch it means working in latch state when the voltage reach the Von point LOAD SINE CURRENT RISE RATE Fall Kate Asus Aus VON LIVING state load working mode When enable LIVING mode as voltage rise and is higher than the Von loading voltage input of electronic load is turned on When the power supply s voltage fall and is lower than Von unload value input is turned off User Manual 28 IT8800 USER MANUAL LOAD SINK CURRENT RISE RATE Aus t VON LATCH state load working mode
8. Verify 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 3 Verify that the correct power line fuse is installed If fuse is blowout please replace it according to the following specification 9 User Manual ball TECH Model Fuse specification 110AC Fuse specification 220AC IT8813 T 3 15A 250VAC T1 5A 250VAC IT8814 T 3 15A 250VAC T1 5A 250VAC IT8816 T 3 15A 250VAC T1 5A 250VAC IT8813B T 3 15A 250VAC T1 5A 250VAC IT9914B T 3 15A 250VAC T1 5A 250VAC IT8816B T 3 15A 250VAC T1 5A 250VAC IT8813C T 3 15A 250VAC T1 5A 250VAC IT9914C T 3 15A 250VAC T1 5A 250VAC IT8816C T 3 15A 250VAC T1 5A 250VAC 4 The method to replace 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 shows the fuse location rear lock 2 2 Front panel introduction 1 The power switch 2 VFD display 3 Rotary knob Operation mode CC CV CR CW keys D Direction buttons D Function keys Number keys Composite function keys User Manual 10 IT8800 USER MANUAL SS l C H IT8800 USER MANUAL 2 3 Rear panel introduction DDD EN Imput terminal Current detection terminal 3 Remote sense terminal external trigger terminals 0 10V anolog
9. control interfaces External signal control interface D RS232 communication interface sl USB communication interface GPIB communication interface AC power switching 110V 220V AC power input socket with fuse in it Fans 2 4 VFD status indicator lamp description OFF Theloadisin OFF state Error Something wrong happened cc Constant current mode Trig Waiting for the trigger signal CV Constant voltage mode Remote sense function is enabled CR Constant resistance mode Prot Software OCP state cw Constant power mode Rear GZ analog control function is open Remote control mode ais Voltage range automatically seleting function is open en The key lock function is open a mode Serial request enquire a hift has been pressed 11 User Manual T C C H IT8800 USER MANUAL 2 5 Key board description Shift ITE CH Re DC Electronic K Glen Enter Shift composite key Recall parameters that have been saved such as current setting value D _ Tran Set the dynamic test parameters Trig Trigger button open trigger function Set the parameters of List test file Pause if needed during auto test Select constant current mdoe set current level Select constant voltage mode set the voltage level D e constant resistance mode set the resistance value GD select constant power mode set the power value ED Ensure button GED Control the input mode on off CETTE value ME crei value gt Right arrow move the cursor
10. factory Warranty This hardware product is warranted against defects in material and workmanship for a period of ONE year from date of delivery IT8800 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 Warranty options product maintenance agreements and customer assistanc
11. 5 kinds of trigger modes to Synchronously trigger the tested instrument before enable the trigger function users should first select trigger source Disale external 0 10V analog signal control function 4 6 2 Trigger source keyboard GED key trigger when the keyboard trigger mode is active press ZE will enable a trigger operation External trigger signal TTL level the 1 pin of the 8 pins connector on the rear panel of the main frame is trigger input terminal when external trigger signal is available input a low pulse gt 10uS to the internal the load will enable a trigger operation Bus trigger when bus trigger is available as soon as the load receive a trigger command GET or TRG from the GPIB port the load will enable a trigger operation Timer trigger when timer trigger is available the electronic load will enable a trigger operation periodly Trigger maintenance when trigger maintenance is available only when the load receive the trigger command TRIG IMM from the communication port the load will enable a trigger operation 4 7 AIB transient operations Transient operation enables the module to periodically switch between two load levels as might be required for testing power supplies dynamic property We can enter the transient operation menu from the front panel by key GED before you turn on the operation you should set the parameters associated with transient operation The parameters inc
12. ED to confirm Set unloading time of the second step if EDIT PROGRAM 10 you need 2S press numeric key 2 then SEQ02 Off Time 2S press EB to confirm Set testing delay time of the second EDIT PROGRAM step e g 15 press numeric key 1 Tpf is testing delay time EU SEQO2 i Terei i Torte 0 Tp To nt T off Tpf is test delay time Set the condition when stop testing PROGRAM COMPLETE mean stop test When all the Complete Stop Failure Stop steps are completed FAILURE mean stop test when the testing fails press key to confirm Whether you need to link to the next file to PROGRAM be tested if you need to link to group 2 Chain Program File 0 0 10 press number key 2 0 stands for not linking to other files Press ED key to confirm e Sequence Save Group _ CAME i Sequence anengen 10 Sequence 41 User Manual T E C H IT8800 USER MANUAL Save the edited files in EEPROM you can PROGRAM save up to 10 groups of files e g please Save Program File 1 1 10 press numeric key 1 to save the edited file in group 1 and then press ED to confirm 15 Press ESC key to exit E Select a operation mode and then press 10 0000V 0 0000A CV setup to set related parameters 9 00W CC 1 000A for example the first step functions in CC mode current setting value is 2A the upper voltage limitation is 10V the lower limitation is 2V the second step works in CV mode setting voltage value
13. S line to signal hold off when its input buffer is almost full and it interprets its Clear to Send CTS line as a hold off signal from the controller 4 When the input queue of the electronic load becomes more than 3 4full the instrument issues an X OFFcommand The control program should respond to this and stop sending characters until the electronic load issues the X ON which it will do once its input buffer has dropped below half full The electronic load 43 User Manual T E C H IT8800 USER MANUAL recognizes X_ON and X_OFF sent from the controller An X OFF will cause the electronic load to stop outputting characters until it sees an A ON 4 NONE There s no flow control Flow control options are stored in non volatile memory RS 232 connections The RS 232 serial port can be connected to the serial port of a controller i e personal computer using a straight through RS 232 cable terminated with DB 9 connectiors Do not use a null modem cable Table 2 2 shows the pinout for the connector If your computer uses a DB 25connector for the RS 232interface you will need a cable or adapter with a DB 25 connector on one end and a DB 9 connector on the other wired straight through not null modem 5 43 2 1 9 87 6 RS 232 connector pinout TXD transmit data RXD receive data no connection e RTS ready to send __ 8 rocomecton _ RS 232 trouble shooting If you are having trouble communicating over the RS 232 interface
14. V 21 4 2 3 Constant resistance mode Chi 21 4 2 4 Constant power Mode CW 22 4 3 INPUT CONTROL iii 23 4 341 INPUESWIICHTO DORSO lai at 23 4 3 2 ONO DEK QUO EE 23 4 4 SYSTEM MENU SYSTEM 23 4 5 CONFIG MENU CONFIG i 24 4 6 TRIGGER FUNCTION eaaa eaaa aana aa aaa eaaa aaa aaa aaa aaa aaa aaa aaa aaa eaaa eaaa ae aaa aee 25 4 6 1 TRIGGER FUNCTION cccecececececeeeececececeaeaeeeceseceaeaeaeececeseaeavaeeseseneatatateeeeentatatanees 25 4 0 2 WRIGGER ele GE 25 4 7 A B TRANSIENT OPERATIONS ageet EE 26 4 7 1 Continuous mode CONTINUOUS erra 26 4 7 2 Pulse mode Pulse 26 4 7 9 Toggled mode LOGGED 26 4 8 LAST OPERATION LIS T seniores continente pate pate nala aga piera an pa ana E agro saio oratore 27 4 9 SAVE AND RECALL FUNCTION E 27 4 10 VON FUNCTION 26 User Manual 2 ITECH IT8800 USER MANUAL 4 110CPTEST FUNCTION EE 30 EE 30 4 13 BATTERY DISCHARGING TEST 31 4 14 PROTECTION FUNCTIONS eaaa eaaa aaa aaa aaa aa aaa aa aaa aaa aaa aaa aa aaa aaa aaa ae aaa eaaa 32 4 14 1 OVER VOLTAGE PROTECTION OVP 32 4 14 2 OVER CURRENT PROTECTION OCP a 32 4 14 3 OVER POWER PROTECTION OPP 33 4 14 4 OVER TEMPERATURE PROTECTION OTP a 33 4 14 5 REVERSE VOLTAGE PROTECTION LRV a 33 4 15 KEY LOCK FUNCTION 33 4 16 REAR PANEL INTERFACES INTRODUCTION rar 34 4 16 1 REMOTE SENSE FUNCTION 0cecececececeeeececececeeeaeaeecece
15. W 5 1 4 Constant resistance CR allowed setting range refer to the Technical Specification There are three means to change the resistance 1 In constant resistance mode rotate Rotary SW 2 In contant resistance mode press numeric keys to set the resistance directly press EID key to confirm 3 In constant resistance mode press Gi CV Setup to set according to the steps below Steps Operation details VFD display 4 Press CR key press GD CV to enter the colin biet Range 7500 00 parameter setup interface gt Set the max working resistance press Constant Resistance Gio confirm Range 20 3 Set the upper voltage level press EBD Constant Resistance confirm High 130 0V Set the lower limit of voltage press to Constant Resistance confirm Low 0 000V 10 0000V 0 0000A 5 le 0 00W CC 2 0000 5 2 Transient test operation Transient operation enables the load to periodically switch between two levels Here we take the example of CC mode For example A B setting value is 1A and 2A The output voltage of power supply is 10V 3A 5 2 1 Transient test operation in continuous mode We can set the transient operation parameters and then run transient test User Manual 36 ITECH IT8800 USER MANUAL Steps Operation details VFD display TRANSITION Use direction key to move to On and select TRANSITION 2 Continuous press Elio confirm the Continuous Pulse Trig indicater lamp on VFD will then be lit T
16. When enable Von LATCH voltage rise and is higher than the Von loading voltage input of electronic load is turned on When the power supply s voltage fall and is lower than Von unload value input won t be turned off 4 11 OCP test function OCP test process When the input voltage has reached Von point current will begin to work after a delay time The current value will increase by a step size at regular intervals Simultaneously unit will judge whether the input voltage is lower than OCP 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 Within this range the test will Pass or will Fault On the contrary the current will continue to increase within the cut off current range And then compare OCP voltage with input voltage too Press key GED to start OCP US CC OCP to enter OCP test function setup interface OCP TEST Run Run OCP test fil OCP TEST Recall e Recall OCP File 1 Recall OCP test file 1 5 OCP TEST OCP 1 Voltage on level 0 000V Set Von value Press key st 2 Voltage on Delay 0 00S Set voltage on delay time 3 Current Range 0 000A Set current range Set start current value 5 Step Current 0 000A Set step current value TEST 6 Step Delay 0 00S Set the step delay time 7 End Current 0 000A Set cut off current 29 User Manual T E C H IT8800 USER MANUAL ie 9 Max Trip Current 0 000A upper limit of OCP value 10 M
17. are OPP users can set load s software OPP value steps ED number 5 gt Protect gt Point set OPP power value Plimit set alarm delay If the load power value is OPP delay time load will automatically turned off VFD will display OPP At the same time the OP and PS bits in the status register will be set they will remain until they are reset Operations to clear the OPP state Check whether the input power is in the rated power range or the programmed protecting ranges if it is outside the range please disconnect the instrument under test Press any key on the front panel or send commandPROTection CLEar the OPP displayed on the front panel will disappear load exits OPP protection state 4 14 4 Over Temperature Protection OTP Each module has an over temperature protection circuit which will turn off the input if the internal temperature exceeds safe limits When load s internal circuit temperature is over User Manual 32 ITECH IT8800 USER MANUAL 85 C load will enable OTP Input will automatically turned off VFD display OTP At the same time the OT and PS bits in the status register will be set they will remain until they are reset Operations to clear the OTP state when load temperature dropped to the protecting point press any key on the front panel or send command PROTection CLEar the OTP displayed on the front panel will disappear load exits OTP protection state 4 14 5 Reverse voltage protection LRV
18. check the following 4 The computer and the electronic load must be configured for the same baudrate parity number of data bits and flow control options Note that the eledtronic load is configured for 1 start bit and 1stop bit these values are fixed 4 The correct interface cables or adapters must be used as described under RS 232 connector Note that even if the cable has the proper connectors for your system the internal wiring may be incorrect 4 The interface cable must be connected to the correct serial port on your computer COM1 COM2 etc Communication setting Before communication operation please make sure that the following parameters of electronic load match that of PC User Manual 44 C H IT8800 USER MANUAL Baud rate 9600 4800 9600 19200 38400 57600 115200 You can enter system menu through panel to set communication baud rate 1 Data bit 8 2 Stop bit 1 3 Parity none even odd EVEN eight data bits with even parity ODD eight data bits with odd parity NONE eight data bits without parity Local address 0 31 default setting is 0 Parity None Start Bit 8 Data Bits Stop Bit 6 2 USB interface use cables with double USB interface to connect load and PC All electronic load functions are programmable over the USB The USB488 interface capabilities of the electronic load are described below 4 The interface is 488 2 USB488 interface The interface accepts REN CONTROL GO TO LOCAL an
19. cluding installation operation self test manual information Test report test report before ex factory 1 2 cleaning Do not clean any internal parts of units casually lf you want to clean the outside cover please use a dry cloth or moistish cloth to wipe Caution Cut the power source before do the cleaning 1 3 Accessory Standard Accessories Power cord User s manual Calibration testing report 1 4 Installationsite The following outside drawing has marked the dimension information Unit should be fixed in a reasonable size of space and make sure proper ventilation conditions 1 4 1 Mounting Dimensions dimension 439 mmW x 133 3mm H x 580mm D Refer to the following dimension drawing T User Manual T E C H IT8800 USER MANUAL Unit minimeter mm 1 4 2 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 C a O China United States Canada Europe United Kingdom IT E171 IT E172 IT E173 IT E174 User Manual 8 1 E C H IT8800 USER MANUAL Chapter 2 Quick Start 2 1 Power on selftest 2 1 1 Introduction A successful test process indicates that units meet the factory specifications and can be operated well 2 1 2 Selftest steps Power cord should be connected correctly Following i
20. d LOCAL LOCKOUT requests 4 The interface accepts MsgID TRIGGER USBTMC command message and forwards TRIGGER requests to the function layer The USB488device capabilities of the electronic load are described below The device understands all mandatory SCPI commands The device is SR1 capable The device is RL1 capable The debice is DT1 capable 6 3 GPIB interface First conncet GPIB port of load to GPIB card of PC with IEEE488 BUS They must be sufficient contact and tighten the screws And then set address The address can be set from 0 to 31 Press ED number 5 to enter system menu press GD key to find Communication select GPIB and then set the GPIB address and use Eito confirm The electronic load operates from a GPIB address set from the front panel The GPIB address is stored in non volatile memory When communicating with PC you can just select one method of all the communication methods above 49 User Manual T E e H IT8800 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 product Call ITECH support line 4006 025 000 DO A OLO OLLI User Manual 46
21. e agreements are also available Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument We assumes no liability for the customer s failure to comply with these requirements Environmental Conditions This instrument is intended for indoor use Pollution degree 2 environments It is designed to operate at a maximum relative humidity of 95 and at altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range Before Applying Power Verify that all safety precautions are taken Note the instrument s external markings described under Safety Symbols User Manual 4 ITECH IT8800 USER MANUAL Ground the Instrument This product is a Safety Class 1 instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cover must be connected to an electrical ground The instrument must be connected to the ac power mains through a grounded power cable with the ground wire firmly connected to an electrical ground safety ground at the power outlet Note Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential sh
22. eeaeaeaeaeeseeentaeaeereeneeneatans 34 4 16 2 EXTERNAL TRIGGER OPERATION eaaa eee rara 34 4 16 3 EXTERNAL ANALOGUE CONTROL vccccacacasucacacaeurncncatusncmcseurncmcsterncmartetncmeseetncmentees 34 4 16 4 VOLTAGE FAILURE INDICATION aa 35 4 16 5 CURRENT MONITORING MONITOR errar 35 CHAPTERD OPERATION INTRODUCTIONS iii 35 5 1 OPERATION ee 35 5 1 1 Constant current CC 35 Di Ee EE wel Ee E C V oeer aaner E E E NGGE NENENG UGA NENG ONG KENE 35 0 1 3 Constant power CAN aaa kanaka aaa aga pada a aa aa aa aaa na a aa a a a anga aa aa aa an a ada a a ara a a a Wg a a ai 36 5 1 4 Constant resistance Ch 36 5 2 TRANSIENT TEST OPERATION eaaa rara 36 5 2 1 Transient test operation in continuous mode anaa e arena n anae aranan 36 5 2 2 Transient test operation in pulse mode 37 5 2 3 Transient test operation in Toggled mode erre 40 5 3 LI TOPERATION eege 40 5 4 AUTOMATIC TESTING FUNCTION rara 42 CHAPTER 6 COMMUNICATION INTERFACES aee ceeecececececececeeeeeceeeeeenenenees 43 b IR523ZINTERPA eee eee eee 43 6 2 USB INTERFACE a aecacecscrcacecscucacecscucacecscuedcoancuesceascueacnascuenceascuedceascuenchascuencbascuenceenes 45 6 3 GPIB INTERFACE AAA AA A AO O AO AS AO IAS IO 45 3 User Manual T E C H IT8800 USER MANUAL Warranty Information Certification We certify that this product met its published specifications at time of shipment from the
23. in Trip Current 0 000A Lower limit of OCP value Save OCP File 1 1 5 Save OCP test file 4 12 OPP test function OCP test process When the input 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 unit 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 within the current range you ve set Within this range the test will Pass or will Fault On the contrary the current will continue to increase within the cut off current range And then compare OPP voltage with input voltage too Press key to start OPP test EMS CW OPP to enter the OPP function test setup interface Run OPP TEST SC e Save OPP File 1 1 5 Save OPP test file Press key 4 13 Battery discharging test Capacity 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 discharge time 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 necessar
24. in accordance with the programmed value regardless of the input voltage See figure4 1 User Manual 20 IT8800 USER MANUAL Load Setting current current Load input voltage V CC mode Figure 4 1 CC mode 4 2 2 Constant voltage mode CV In this mode the electronic load will attempt to sink enough current to control the source voltage to the ge value See figure 4 2 Setting Load voltage input voltage Load current CV mode Figure 4 2 CV mode 4 2 3 Constant resistance mode CR In this mode the electronic load was equivalent to a constant resistance as shown below the electronic load will linearly change the current according to the input voltage See figure 4 3 V Slope Current setting Loadinputvoltage CR mode Figure 4 3 CR mode 21 User Manual T E C H IT8800 USER MANUAL 4 2 4 Constant power mode CW In this mode the electronic load was equivalent to a constant power as shown below As the input voltage increase the current value will decrease See figure 4 4 Setting power Load current CW mode Figure4 4 CW mode 4 3 Input Control 4 3 1 Input switch operation You can control the On Off state via pressing the CID button when Cd buttonis lit that means the input is opened when CD button is lighted the input is off If input have been opened indicator lamp off on the VFD display would be dark 4 3 2 Short operation The load can simulate a short circuit at it
25. inimum amount of overhead Generate complex sequences to complete complex tests by editing LIST Select different trigger resource editing the step value width time and slew rate of every step The parameters of List operation include the name number of steps max 2 84 single step width time 0 00002s 3600s and every step s set value and slew rate The list file can be saved in non volatile memory used to fast recall Users can edit up to 7 groups list file In list operation mode the load begin to enable the list operation once receive the trigger signal until the list operation is completed or the instrument receive another trigger signal Trigger 0 1 2 SA 5 4 List count 1 _ rna List count 2 T gt List sequence 4 9 Save and recall function We can save some often used parameters in the non volatile memory the parameters includes working mode voltage current value and so on The memory capacity is 100 groups You can use SAVE key to save parameters press key to fast recall Save and recall operation For example the voltage provided is 6V and the load works in CC 1A Operation VFD display E 5 8949V 0 99994A 5 89W SAVE 9 SAVE set all the parameter press ED number 4 and then 9 to save data to file 9 2 Press key GED to confirm 5 8949V 0 99994A 2 89W cc 1 000A RECALL 1 Press key GED press number 9 recall from 9 file 5 8949V 0 99994A to recall the data that is saved in the memory
26. is 3V and the upper current limitation is 5A and the lower current limitation is 0A After all the steps are set OK Press ESC key to exit setup and then press number key 4 to save aa You need to recall the auto test file before runing it Recall testing files The following way can make you fast recall the edited testing files from EEPROM after re powering Steps 1opertiiis VFD display Shift PROGRAM ES Es Run Recall Edit Press direction keys to move to lt RECALL RECALL PROGRAM 2 PROGRAM to recall the saved testing Recall Program File 1 files press GSP Ito confirm 3 Press direction keys to move to lt RUN PROGRAM PROGRAM and then confirm Run Recall Edit 4 Display PRGO1 PRGO1 STOP Press 5 If you need a pause please press Pause Push the down arrow can continue the testing file User Manual 42 1 E C H IT8800 USER MANUAL Chapter 6 communication interfaces There are three kinds of communication interfaces for 1T8800 GPIB USB RS232 You can choose any one of them to communicate with PC 6 1 RS232 interface use a cable with two COM interface DB9 to connect load and PC It can be activated by number 5 Note There re two COM interfaces on the rear panel of IT8800 the above 9 pin COM interface is RS232 communication interface the below 9 pin COM is serial port connection extended keyboard interface All SCPI commands are available through RS 232 programming The EIA RS 232
27. load leads remote sensing provides greater accuracy by allowing the load to regulate directly at the source s output terminals Before you use this function you should first enable this function in the menu the operation IS 1 Press GD number 6 into the menu 2 VFD displays gt CONFIG press EED key to confirm 3 Press direction key to choose gt REMOTE SENSE press EID key to confirm 4 Press direction key to choose gt ON press GED key to confirm And the remote sense function has been set 33 User Manual T E C H IT8800 USER MANUAL Wiring diagram for remote sense nput port in front pane e pa sense port in rear pane CG 4 16 2 External trigger operation Before take the rear panel trigger way please set the trigger source as EXTERNAL first trigger signal will input from the TRIG pin of the rear panel When you choose external trigger mode trigger signal should be connected to TRIG and ground pins 4 16 3 External Analogue Control You can control the voltage and current setting of the electronic load by the analogue terminals EXT and PRG 0 10V adjustable analogue simulate the 0 fullscale to regulate the input voltage and current of the electronic load 10V indicate the full range of load voltage or current value 4 16 4 Voltage Failure Indication When the load is under OVP or reverse protection condition pin 2 VF will output high level signal 4 16 5 Current monitoring 1 Monitor Current m
28. lude A level A width B level B width and transient testing modes The transient testing modes have 3 kinds continuous pulsed or toggled 29 User Manual ball TECH 4 7 1 Continuous mode Continuous Under the continuous mode when the transient test is turned on the load will continuously switch between the A B levels preset IT8800 USER MANUAL T Continuous Transient Operation 4 7 2 Pulse mode Pulse In pulsed mode you can set A B level A B width and A B slew rate via mainframe keyboard The electronic load will automatically switch to A level after maintaining A width time then it will switch to B level it won t swith to A level until the the instrument receive the pulse signal The following picture show the current waveform in pulse transient operation TWD TWD EE gt ak sl TRIG TRIG Pulsed Transient Operation 4 7 3 Toggled mode Toggled In toggle mode the electronic load will switch between A level B level when receiving a triggering signal after the transient operation is enabled The following picture show the current waveform in toggle transient operation Toggled Transient Operation TRG TRG User Manual 26 ITECH T8800 USER MANUAL 4 8 List operation LIST List mode lets you generate complex sequences of input changes with rapid precise timing which may be synchronized with internal or external signals This is useful when running test sequences with a m
29. nctions over voltage protection OVP over current protection OCP over power protection OPP over temperature protection OTP reverse voltage protection LRV RRV The mainframe will act appropriatly once any of the above protection is actived you can press any button on front panel to restore the protection function For example the electronic load come into over temperature protection the buzzer will alarm the input will automatically shut down and VFD will display OTP 4 14 1 Over Voltage Protection OVP If the OVP circuit has been triggered input will be shut down buzzer alarm the status register s OV and VF bit is set the main frame screen will display OVP the condition will remain until they are reset Once over voltage protection occur the 8 pins connector s VF pin on the rear panel will output TTL high voltage level you can control the output state of the power supply under test via this pin 31 User Manual T E C H IT8800 USER MANUAL Operations to clear the OVP state Check whether the input voltage is in the load s rated voltage or the programmed protecting voltage ranges if it is outside the range please disconnect the instrument under test Press any key on the front panel or send commandPROTection CLEar the OVP displayed on the front panel will disappear load exits OVP protection state 4 14 2 Over Current Protection OCP The electronic load includes both hardware and software over c
30. ock hazard that could result in personal injury DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of fumes or flammable gases KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers except as instructed in this Guide for installing or removing electronic load modules Component replacement and internal adjustments must be made only by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not try to do some internal service or adjustment unless another person capable of rendering first aid resuscitation is present Safety Symbols Direct current Alternating current Both direct and alternating current Protective earth ground terminal gt de Caution refer to accompanying documents WARNING The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly perfo
31. oggle 3 Use direction key to select high low rate TRANSITION move to High Rate press Eito confirm High Rate Low Rate 4 Set the current rise slope press Eiio TRANSITION confirm Rise up 30 000A uS 5 Set the current fall slope press GZ to TRANSITION confirm Rise down 30 000A uS TRANSITION e Set the A leval press ELDto confirm Level A AA TRANSITION Set the B level press EISDto confirm Level B 2A TRANSITION Set the frenquency press Gio confirm Frequnce 50Hz 0 01 25000Hz TRANSITION a Set the dutyfactor press Edito confirm Duty 98 0 1 99 9 Enable the transient test function use TRANSITION 10 direction key to move to On pressGZ to On Off confirm Then the VFD will display TRAN 10 0000V 0 0000A 0 00W OTRAN Press On Off button to On en press AIB value will switch continuously the running time will display at the lower right corner press Esc button will quit the transient test if you want to continue the test again please repeat 1 12 steps 5 2 2 Transient test operation in pulse mode We can press to set the transient test parameter and run the test Steps Operation details VFD display TRANSITION Use direction key to move to Pulse TRANSITION 2 press Eito confirm the Trig indicator Continuous Pulse lamp on the VFD will be lit Toggle Use direction key to move and to select the TRANSITION high low Rate move to High Rate Low Rate High Rate p
32. ol temperature Operating temperature O to 40 C Storage temperature 20 to 70 C Humidity Indoor use humiditys 95 19 User Manual T E C H IT8800 USER MANUAL Chapter4 Function and Characteristic We will introduce the functions and characteristics of EL completly in this chapter from several parts Local remote operation mode switching Constant operation modes Input control System menu Config menu Trigger function Dynamic test function List operation Save Recall function VON function OCP test function OPP test function Battery test function Protection function Key lock function Terminal on rear panel 4 1Local Remote operation mode The electronic load provides two control mode Local mode and remote mode which can be switched by Local key on the front panel or SCPI command Local operation means control the electronic load via the keys on the front panel and the menu operation Remote operation means control the electronic load through computer via the GPIB RS232 USB or Ether Net interface in local mode all the buttons on front panel can be used In remote control mode the keys can not work 4 2 Operation modes The electronic load can be operated in the following five modes 1 constant current mode CC 2 constant voltage mode CV 3 constant resistance mode CR 4 constant power mode CW 4 2 1Constant current mode CC In this mode the electronic load will sink a constant current
33. onitoring terminal will output 0 10V analog signal to accordingly on behalf of 0 full range of input current You can connect an external voltmeter or an oscilloscope to display the input current s changing User Manual 34 ITECH T8800 USER MANUAL Chapter5 Operation introductions 5 1 Operation modes 5 1 1 Constant current CC set a value from O to upper limit of current There are 3 means to change the current value 1 In CC mode rotate Rotary SW 2 In CC mode press number to set the current directly press EID key to confirm 3 In CC mode press ED CV Setup to set according to the steps below Steps Operation details VFD display 1 In CC mode press SHLD cvsetup to enter a op lt HEN the parameter setup interface i Set the max working current press dio Constant Current e confirm Range 1 000A 3 set the upper limit of voltage press GSD button Constant Current to confirm High 0 00V 4 set the lower limit of voltage press ZED button Constant Current to confirm Low 0 000V Constant Current Set the high low rate press GED to confirm High Rate Low Rate 5 Constant Current e Set the current rise slope press EXD to confirm Rise up 0 000A uS Constant Current Set the fall slope press EB confirm Rise down 0 000A uS 10 0000V 0 0000A CN The parameters are set OK 0 00W CC 1 000A 5 1 2 Constant voltage CV set a value from minimum setting voltage to upper limit of voltage There are three means to change
34. own 30 000A uS TRANSITION Set A level press GID to confirm Level A 1A TRANSITION 7 Set B level press GD confirm Level B 2A Enable transient test use direction key to TRANSITION move to On press GD to confirm On Off Then the VFD will display TRAN 10 0000V 0 0000A 0 00W OTRAN Press On Off button to On then press AIB value will switch to B A every time when there is trigger signal received the running time will display at the lower right corner User Manual 38 IT8800 USER MANUAL press Esc button will quit the transient test if you want to continue the test again please repeat 1 10 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 Example the supply output to be tested is 10V current 3A and the load is in CC mode Trigger 0 1 2 34 5 e List count 1 List count 2 gt List seguence The steps wem Operation details VFD display nu Ip K SES Recall Edit Use direction key to move to Edit press Eiio confirm High Rate Low Rate a que direction De dang o o move to High Rate to move to High Rate EDIT LIST a O fo move to High Rate confirm Current Range 3A e Set the list step by pressing the numeric EDIT LIST 4 key for example if you just want 2 steps just File Step 2 2 84 press key 2 pre
35. put the load to OFF state the settings keep for the latest setup If you choose no update when you turn the load to OFF state the settings will keep the old settings 23 User Manual 4 5 Co Von point living state ON OFF Point 2V set the Von value PROTECT MENU S Max P Setup hardware power protection CURRENT LIMIT Protect Off disable the function MENU Off disable the function MEASURE MENU V Range Voltage auto range function VOLTAGE AUTO RANGE On voltage auto range function on Off voltage auto range function off TimeV1 Test the voltage rise fall time Measure TIMER VOLTAGE1 setthe start voltage level Point 0 000V TimeV2 Test the voltage rise fall time TIMER VOLTAGE2 __ set the end voltage level Point 120 00V FILTER Filter function Average Count 24 2 16 the everage number set CR LED MODE Imitate the LED in CR mode CRED On Enable the function in CR mode press GMD CV to set Vd Disable this function REMOTE SENSE STATE On Off Time Set LOAD ON timer oe OI disable the function Remote sense function Remote Sense Enable this function Disable the function DI iS User Manual kel L C H IT8800 USER MANUAL EXTNAL fon VE Extenal analog signal function Ext Program Don Je function 4 6 Trigger function 4 6 1 Trigger function Trigger operation can be used in the following operations transient pulse output triggered output and list output The electronic load have
36. ress Edito confirm 4 Set the rising slope press Gio confirm TRANSITION Rise up 30 000A uS TRANSITION Set the fall slope press GED to confirm Rise down 30 000A uS TRANSITION Set A level press G90 confirm Level A 1A 37 User Manual T E C H IT8800 USER MANUAL 7 SetBlevel press com Jee TRANSITION Set the time width press EB io confirm Pulse Width 5S 0 00002 3600S Enable transient test use direction key to iat sdh move to On press Elio confirm Off KH Then the VFD will display TRAN W 0 0000A 0 00W OTRAN Press On Off button to On en press AIB value will switch Trig every time when there is trigger signal received the running time will display at the lower right corner press Esc button will quit the transient test if you want to continue the test again please repeat 1 11 steps 5 2 3 Transient test operation in Toggled mode We can press to set the transient test parameter and run the test Operation d details VFD display TI Use direction key to move to Toggle TANGI 16h press BS Et confirm the Trig indicator Continuous Pulse lamp on the VFD will be lit Toggle Use direction key to move and to select the TRANSITION 3 high low Rate move to High Rate Low Rate High Rate press GID to confirm nu Set the rising slope PARE A ambaka confirm Pan Keilen IA Da ambik A Pa Pan 000A uS TRANSITION Set the fall slope press BS Et confirm Rise d
37. rmed or adhered to could result in damage to or destruction of part or all of the products Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met 9 User Manual T E C H IT8800 USER MANUAL Introduction IT8800 series DC electronic loads are singel channel programmable electronic loads With RS232 GPIB USB communication interfaces The series DC electronic loads can provide multiple solutions according to the requirements of your design and test Feature e Highlight VFD display e Dynamic mode Up to 25KHZ e Measurement resolution 0 1mV 0 01mA e Measurement speed up to 50KHZ e Four operation mode CV Constant Voltage CC CR CW Rotary knob making the operation more easier Remote Sense function Battery test function Memory capacity to save recall setting parameters 100 sets e Short circuit function e With skid resistant tripod and portable firm chassis e Controlled by intelligent fans e Build in Buzzer as alarm signal Power off memory function Model _ _ Voltage Current Power User Manual 6 1 E C H IT8800 USER MANUAL Chapter1 Inspection and Installation 1 1 Inspection Make sure you have received the following compontents along with unit lf anyone has been lost please contact with your franchiser Rem Part Number IT E171 IT E172 you can choose difference power line Power cord IT E173 according to region IT E174 User s in
38. s input You can press ED number 1 to switch to short state in local operation mode operate with pront panel Short operation won t affect the present setting When turn off the short state the load returns to the original set state The actual current of the electronic in short operation depend on the mode and range active when the short is turned on In CC CR or CW mode the maximum short current is 120 of the current range In CV mode short means setting the load s constant voltage to be OV 4 4 System menu System Press i number 5 to enter the system menu INITIALIZE SYSTEM o Initialize Keep the current configure Reset all configuration to defaut _ to default SYSTEM POWERON e ON PARAMENT Power ON default state when power on SAVE O set when power on User Manual IT8800 USER MANUAL Buzzer Knob Old Noupdatet amp O_ TRIGGER SOURCE Set the trigger source Bus GPIB BUS trigger mode MEMORY Operated with Recall button to recall 100 groups Memory memories group 11 20 and so on Disp Off default Disable the function Select the communication interface when communicate with PC RS2322 4800 8 N no parity 1 NONE Move the Communication direction keys to cloni ine Comm canen dee USBTMC J gt PROTOCOL P 01960 Extend Table Extended SCPI protocol compatible with other units Knob function real time update means after you adjust the parameter by knob and then
39. s the detailed selftest steps VFD display Explanations USE ECH As BOIS Ver 1 10 display software version About 1S later System Selftest system self check VFD the first line display actual voltage and current value 0 0000V 0 0000A VFD the second line display the actual 0 00W CC 0 000A power value and the setting current voltage power resistance impedance value About 1S later Press ED Model IT88XX Display products s information You can Ver 1 XX 1 XX press direction buttons to check product s number SN XXXXXXXXXXXXXXXXXXx model SN software version 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 grounded 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 If the electronic load can t power on The following means could help you solve some problems you may meet when you turn on the units 1 Verify that there is AC power to the power supply First verify that the power cord is firmly plugged into the power receptacle on the rear panel of the electronic load You should also make sure that power source you plugged the electronic load into is energized Then verify that the electronic load is turned on 2
40. ss GED to confirm 5 Edit the current of the first step EDIT LIST press GED to confirm Step 001 Level 1A Edit the slope of the first step press GED to ot a confirm Rate 0 1A uS step press EZD o confirm Step 001 Width 5S 8 Seppress biocontim L Leverza step press BS confirm Step 002 Level 2A EDIT LIST Edit the slope of the second Step 002 step press GD confirm Rate 0 1A uS Edit the time width of the second EDIT LIST ai press amp to confirm Step 002 Width 5S EDIT LIST mn Edi the repeat count press GB confirm Reapeat Count 3 gt Save the file edited to memory 1 9 by EDIT LIST 39 User Manual A T I C H IT8800 USER MANUAL __ pressing numeric key press Go confirm Save List File 1 1 9 Use direction key to move to On press Elo confirm then the Trig LIST indicator lamp on the VFD will be lit press On Recall Edit Esc key will exit the settings Enable On Off to On press to List test will run trigger Press Esc to exit the test if you need to exit the list test Note if you want to run a list file you ve saved please recall it firstly The steps is to press GSD after you enter the List menu move the direction key to select Recall Press ED button to confirm 5 4 Automatic Testing Function Automatic test function of IT8800 series electronic load is very powerful it can simulate various test It can edit up to 10 groups of testing files
41. standard defines the interconnections between data terminal equeipment DTE and data communications equipment DCE The electronic load is designed to be a DTE It can be connected to another DTE such as a PC COM port through a null modem cable Note The RS 232 settings in your program must match the settings specified in the front panel system menu Press number 5 if you need to change the settings You can break data transmissions by sending a C or X character string to the multimeter This clears any pending operation and discards any pending output RS 232 data format The RS 232 data is a 10 bit word with one start bit and one stop bit The number of start and stop bits is not programmable However the following parity options are selectable in the menu using the frongt panel ED number 5 Parity options are stored in non volatile memory Baudrate The front panel ED number 5 lets you select one of the following baud rates which is stored in non volatile memory 4800 9600 19200 38400 57600 115200 RS 232 flow control The RS 232 interface supports the following flow control options that are selected using the front panel number 5 For each case the electronic load will send a maximum of five characters after hold off is asserted by the controller The electronic load is capable of receiving as many as fifteen additional characters after it asserts hold off 4 The electronic load asserts its Request to Send RT
42. tage 0 025 0 025 0 a 025 F 0 025 0 025 t 0 025 0 025 F Accuracy FS FS S D 60A oa TI om current 0 05 0 05 FS 0 05 0 05 FS 750W 750W power o ee en EE EE EE User Manual 14 CC mode kel T E C H IT8800 USER MANUAL current 6 6 6A 66 60A 3 3 3A 33 30A CC voltage resistance 4 geminal terminal 300KQ geminal Model D nn 188148 Rated value 0 40 CH Minmum setting 0 12V 12A 1 2V 120A 0 36V 6A 3 6V 60A Ta range 0 18V 0 120V 0 50V 0 500V CV mode om Im JI 10MV 0 22 05 F 0 a 05 F as 0 ORS OTE 05 F accuracy S FS 0 12A 0 120A La CC mode m O Om imA m 0 0 0 0 0 0 Pa 0 05 0 05 FS 0 09 ee 05 FS 0 05 zeiten 05 F 0 05 SNE 05 FS CR mode resolution nen S range CW mode Dynamic mode CC mode Dynamic mode 0 001 0 25A uS 0 01 2 5A uS 0 0001 0 1A uS 0 001 1A uS time Measurement range 0 18V 0 120V 0 50V 0 500V Readback resolution 1mV SH FS ES ei pr Protection range OPP SAB 1500 15 User Manual T C H IT8800 USER MANUAL o RE specification o 13 2 12A 132 120A 6 6 6A 66 60A voltage CV resistanc germina terminal 300KQ germina Model 1T8846 988168 Rated value 0 40 C Minmum setting 0 12V 24A 1 2V 240A 0 3V 10A 3V 100A E range 0 18V 0 120V 0 50V 0 500V CV mode mv AOMV m m _ 0 venir 05 F ec EE 0 Ee 05
43. the voltage value 1 In CV mode rotate Rotary SW 2 In CV mode press numeric keys directly to set the current value press GED to confirm 3 In CV mode press CV Setup to set according to the steps below Steps Operation details VFD display 4 Press CV button then press ED CV setup constant soled Range 120 00V enter the parameter setup interface Set the max working voltage press GED to Constant Voltage confirm Range 2 33V Set the upper limit of current presss EZDto Constant Voltage confirm High 66 000A 4 Set the lower limit of the current press GZEDto Constant Voltage confirm Low 0 0000A 5 10 0000V 0 0000A All finished 0 00W CV 2 33V 39 User Manual ball TECH 5 1 3 Constant power CW There are three means to change the power 1 In constant power mode rotate Rotary SW 2 In contant power mode press numeric keys to set the power directly press GED key to confirm 3 In constant power mode press ED CV Setup to set according to the steps below IT8800 USER MANUAL Steps Operation details VFD display Shift Constant Power 4 Press CW key press CV to enter the Range 400 00W parameter setup interface 9 Set the max working power press EZo Constant Power confirm Range 1 00W 3 Set the upper voltage level press Eiter to Constant Power confirm High 130 00V Set the lower limit of voltage press LED to Constant Power confirm Low 0 000V 10 0000V 0 0000A sm e 0 00W CW 1 00
44. to the right when in set mode V lt Left arrow move the cursor to the right when in set mode LS Confirm button fradixpointkey User Manual 12 2 6 Combination keys EID number Short Start or stop short test function ED number 2 pragma Auto test function ED number 3 Battery Battery test function ED number 4 Save Save the current setting value such as current setting value Configure menu setting LOCAL key used to switch local and remote mode END cv setup 13 User Manual T E C H T8800 USER MANUAL Chapter3 Technical Specification 3 1 Main technical specification Model D nn ng Current 0 6A row oan Tas Rated value saw YO 0 40 CH Minmum setting 0 1V 6A 1 0V 60A 0 36V 3A 3 6V 30A Ta _ range 0 18V 0 120V 0 50V 0 500V CV mode 0 CN O5 F 0 05 FS 0 EK 05 0 wr A 05 F accuracy La Ca resolution 0 1mA 1mA mA 0 1MmA 1mA m ra OOO 0 wa 05 FS 0 HL H 05 FS 0 DE H 05 F 0 HL D 05 FS accuracy S 0 a 10Q 7 5KQ 0 150 100 10Q 7 5KO CR mode 16bit 16bit 0 01 0 08S 0 01 0 0008S 0 01 0 08S 0 01 0 0008S 750W 750W 0 2 0 2 FS 0 2 0 2 FS Dynamic mode CC mode TI amp T2 20uS 3600S Res 1 uS 20uS 3600S Res 1 uS Dynamic 5 uS 100ppm 5 uS 100ppm mode slew rate 0 0001 0 25A uS 0 001 2 5A uS 0 0001 0 1A uS 0 001 1A uS time Measurement range 0 18V 0 120V 0 50V 0 500V vol
45. urrent protection features Hardware OVP load s maximum input current will be limited at about 110 of the current range once the hardware OCP is triggered the status register s OC bit will be set when the hardware OCP is removed the status register s OC bit will be reset Hardware over current protection wont affect load s on off state software OCP users can set load s software OCP value steps ETD number 5 gt Protect gt Alimit set ON Apoint set OCP current value Adelay set delay time before alarm When the software OCP function is actived if the load current value is over the over current protection set value load will automatically off VFD displays OCP At the same time the OC and PS bits in the status register will be set they will remain until they are reset Operations to clear the OCP state Check whether the input current is within the load s rated current or the programmed protecting current ranges if it is outside the range please disconnect the instrument under test Press any key on the front panel or send command PROTection CLEar the OCP displayed on the front panel will disappear load exits OCP protection state 4 14 3 Over Power Protection OPP The electronic load includes both hardware and software OPP features Hardware OPP the electronic load allows user to set a power protection limit in hardware which will limit the power in the range you set when the OPP condition occur Softw
46. y to do the test before you change another new accumulator Shift number 3 Press key User Manual 30 bal TECH IT8800 USER MANUAL V STOP Condition oltage Stop Voltage Set the cut off voltage STOP STOP Condition CONDITION wanan Stop Capability Set the cut off capacity STOP Condition Stop Timer Set the discharge time Timer Operation 1 Press key GED to turn off the load connect the battery to be tested press number 3 in CC mode to enter the battery discharging function menu select one of the 3 testing means according to your test demands 2 For the first means press key number 3 select Capability Press key Gp VFD display Stop Capability Ah set the cut off capacity press key GSD to confirm when the capacity falls to the value set the load will auto turn to input off state 3 For the second means press key ED number 3 select Voltage press key Giz VFD will display Stop Voltage V set the cut off voltage press key EB to start the battery test When the battery voltage falls to the cut off voltage the load will auto turn off the input 4 For the third means press GD number 3 select Timer press EID key VFD display Stop Timer S set the discharging time the load will automatically turn off after the setting time 5 Press key to start to test 6 Press ESC quit the battery test mode 4 14 Protection Functions Load has the following protection fu
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