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ITech IT8912E User Manual Download Page 50

References

of Load Communication Interfaces

Copyright ©ITECH Electronic Co., Ltd.

42

Chapter5 References of Load

Communication Interfaces

IT8912E electronic load is provided with two communication interfaces to
communicate with a computer for selection, including S232 and USB.

5.1 RS232 interface

Connect E-load and computer by cable of COM ends (DB9). Composite key

[Shift]

+ numeric key 8 on front board can be used to enter system menu for

activation.

In  RS-232  interface,  all  SCPI  commands  can  be  used  for  programming.  If
RS-232  interface  is  selected,  in  accordance  with  internal  connection  of  data
terminal  equipment  (DTE)  and  data  communication  equipment  (DCE)  as
defined  in  EIA  RS-232, the  load  is  connected  to another  DTE (e.g.,  PC COM
interface) with direct-connected Modem cable.

NOTE

IT8912E has two COM ports at the rear panel: The 9-hole COM port connectors at top are
the RS232 communication ports; and the 9-pin COM ports at bottom are the external signal
control interfaces.

RS-232 setting in procedure should be consistent with that in system menu of front board.
Press composite key

[Shift]

+ numeric key 8 to change (if necessary). Send a ^C or ^X

character string to the load to pause data transmission. It will clear any uncompleted
operation and waive any uncompleted output.

RS-232 data format

RS-232 data is a 10-bit word having a start bit and a stop bit. Start bit and stop
bit are not editable. However, next odd or even item can be selected by front
board

[Shift]

+ numeric key 8 (System). The odd and even items are saved in

NVM.

Baud rate

Through front board

[Shift]

+ numeric key 8 (System), the user may select one

Baud rate saved in NVM: 4800/9600/19200/38400/57600/115200

RS-232 Connection

Use RS-232 cable with DB-9 interface because the RS-232 serial port can be
connected controller (e.g. PC) serial port. Do not use modulating cable of
air-conditioner.

If your computer is provided with a RS-232 interface with DB-25 plug, a cable
and a adapter with DB-25 plug (one end) and DB-9 plug (the other end) are
required (not the modulating cable of the air-conditioner).

RS232 Pins of Plug

Base pin
number

Description

1

No conjunction

2

TXD, data transmission

3

RXD, data receiving

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Summary of Contents for IT8912E

Page 1: ...Programmable DC Electronic Load IT8912E User s Manual Model IT8912E Version V2 0...

Page 2: ...ense and can only be used or copied according to the license Restricted permission statement Restricted permissions of the U S government Permissions for software and technical data which are authoriz...

Page 3: ...mitation of Warranty Warranty service does not apply to the damage caused in the following circumstances Damage resulting from customer wired circuits or customer supplied parts or accessories Product...

Page 4: ...mum short circuit current of electronic load without overheating If there are multiple electronic loads each pair of the power cord must be capable of bearing the full loaded rated short circuit outpu...

Page 5: ...ic product cannot be discarded in household waste This symbol indicates that no danger will happen or toxic substances will not leak or cause damage in normal use within the specified period The servi...

Page 6: ...2 2008 EN 61000 4 2 2009 IEC 61000 4 3 2006 A1 2007 A2 2010 EN 61000 4 3 2006 A1 2008 A2 2010 IEC 61000 4 4 2004 A1 2010 EN 61000 4 4 2004 A1 2010 IEC 61000 4 5 2005 EN 61000 4 5 2006 IEC 61000 4 6 2...

Page 7: ...2 7 Power on selftest 9 Chapter3 Function and Features 12 3 1 Switching of local remote operation modes 12 3 2 Constant status operation mode 12 3 2 1 Constant current operation mode CC 12 3 2 2 Cons...

Page 8: ...35 3 19 3 External analog quantity test 35 3 19 4 Voltage fault indication 35 3 19 5 Current monitoring I Monitor 36 3 20 Auto test function 36 Chapter4 Technical Specification 39 4 1 Specification 39...

Page 9: ...t report 1 Test report before delivery NOTE After confirming that package contents are consistent and correct please appropriately keep package box and related contents The package requirements should...

Page 10: ...s equipped with a handle for user to easily carry and place it The load handle can be adjusted based on the three methods shown below When adjusting the handle gently pull the handle towards two sides...

Page 11: ...too much force and mind your hands during disassembly of load handle 1 5 Rackmount Installation This instrument can be installed on standard 19 inch rack ITECH provides user with IT E151 IT E151A rac...

Page 12: ...t that higher than the rating value Always use test lines provided by ITECH to connect the equipment If test lines from other factories are used please check that the test line can withstand maximum c...

Page 13: ...visibility vacuum fluorescent display VFD CC dynamic mode up to 20KHz Voltage measurement dissolution rate up to 10 mV Current 0 01 mA 10 uA Voltage and current measurement speed up to 50 KHz CC CV C...

Page 14: ...Quick Start Copyright ITECH Electronic Co Ltd 6 NOTE IT8912E G is the model with built in GPIB the function is the same as standard model please check with ITECH for availability...

Page 15: ...n off direction key to toggle the menu items move the cursor location input terminal 2 3 Introduction of keyboard Keys at IT8912E key area are shown below Detailed description of keys keys Name and fu...

Page 16: ...nctions marked at key bottom For details see table below keys Name and functions Short To start or end short circuit test Tran To set dynamic operation parameters List To set list operation function S...

Page 17: ...art external analog quantity function Rmt The load is under remote operation mode Auto Start automatic voltage range Addr Send command under remote operation Start keyboard locking function SRQ Serial...

Page 18: ...1 10 2 After approximately 1s the system is under selftest and the VFD display shows System Selftest 3 After selftest the VFD display information below 0 0000V 0 000A 0 00W CC 0 000A Information desc...

Page 19: ...start 4 Check whether the fuse of electronic fuse is burned out If yes change fuse Detailed steps 1 Pull out power line and take out the fuse box at power line jack with a small screw driver As shown...

Page 20: ...es can be switched through communication commands At initialization the electronic load is defaulted under local operation mode Local operation mode for operating related functions through keys on the...

Page 21: ...enter parameter setting screen Constant Current Range 0 000A 2 Set maximum working current value and press Enter for confirmation Constant Current Range 1 000A 3 Set maximum voltage value and press E...

Page 22: ...load provides three ways to modify constant voltage Rotate adjusting knob to set constant voltage value Use numeric keys to input voltage value and press Enter key to confirm set constant voltage val...

Page 23: ...ss Enter key to confirm set constant resistance value Use moving cursor and press to adjust values at corresponding positions Operation steps 1 Press Shift CR LED CR key and Shift CV to enter paramete...

Page 24: ...value and press Enter for confirmation Constant Power Range 1 00W 3 Set maximum voltage value and press Enter key Constant Power High 130 00V 4 Set minimum voltage value and press Enter key Constant P...

Page 25: ...s in 100 group NVM for convenient and fast usage Saving parameters comprise working mode voltage current etc The Shift 4 Save keys can be used for saving parameters The Shift Enter Recall key is for q...

Page 26: ...rigger TRIGGER SOURCE Set triggering mode Manual Def Manual trigger External External signal trigger mode Hold Trig IMM valid Bus GPIB bus trigger mode Timer Timer trigger mode Memory MEMORY Save reca...

Page 27: ...Point 120 00V FILTER Smoothing function Average Count 2 2 16 Set of average count Remote Sense REMOTE SENSE STATE Remote sense function On Enable remote sense function Off Disable remote sense functio...

Page 28: ...S BUS command trigger HOLD special command trigger Timer timing trigger 4 Press Esc to exit setting The system displays original values under different modes 3 10 List operation LIST mode provides an...

Page 29: ...Edit Press Enter key EDIT LIST High Rate Low Rate 3 Operate key and move to the High Rate and press Enter key EDIT LIST Current Range 3A 4 Edit number of steps Press 2 key to edit two steps Press Ent...

Page 30: ...t File 1 3 Operate key and move to On Press Enter key The Trig lamp that indicates VFD screen status is on Press ESC key to exit setting LIST On Recall Edit 4 Press On Off key to open input and press...

Page 31: ...tus is on TRANSITION Continuous Pulse Toggle 3 Operate key and select high range and low range Move to the High Rate and press Enter key TRANSITION High Rate Low Rate 4 Set ascending slope and press E...

Page 32: ...erations under other modes are similar when output voltage and current of the tested instrument are 10 V and 3 A respectively the load current will switch from 1 A and 2 A Set the dynamic test paramet...

Page 33: ...st 3 11 3 Toggle mode Under toggle mode after enabling dynamic test operation the load will switch one time between A value and B value after receipt of every trigger signal Taking CC mode as example...

Page 34: ...test mode when input voltage reached Von value delay for a while for the electronic load to latch Ascend value by step value at regular interval At the same time check the load input voltage and judg...

Page 35: ...perate and the board will display as follows 9 9990V 0 0009A 0 01W 0 100A FAULT STOP 3 13 OPP test function 1 Press Shift CW keys to enter OPP test function setting screen OPP TEST Run OPP TEST Operat...

Page 36: ...the OPP will fail to operate and the board will display as follows 9 996V 0 0007A 0 01W 0 1W FAULT STOP 3 14 Battery discharge test function In the IT8912E electronic load constant current mode is ap...

Page 37: ...Shift key to start test The board will display discharge voltage current discharge time and discharged capacity AH 4 Press ESC key to exit battery capacity test mode in any three methods 3 15 CR LED...

Page 38: ...urce Vf break over voltage of diode string Rd LED impedance value Get the equation below through the above four parameters and V I characteristic curve of LED DC R R I V R V V R I V V V R I V V I R V...

Page 39: ...keys to set final voltage value and press Enter key d Press ESC to exit setting 2 Start timer function a Press Shift 8 keys to enter system menu Press Right key till Displ flicks and press Enter key b...

Page 40: ...unnecessary trouble from failure of loading If the instrument cannot load please firstly check whether the VON function is set If yes reset the Von value to minimum value which may be directly set as...

Page 41: ...ad till resetting In case of overvoltage protection the VF pin of the 8 pin connector on rear board of the load outputs TTL high level and the PWM pin can be used for controlling output status of the...

Page 42: ...wer protection the user can set load software overpower protection value following steps press Shift 9 key Protect P Limit Point set OPP power value Delay is set as pre alarm delay time If the loading...

Page 43: ...rstly set the trigger source as External and the triggering signal is input from the rear board TRIG terminal Press Shift 8 keys to enter system menu Click Right key till Trigger appears and flicks Pr...

Page 44: ...t 6 keys PROGRAM Run Recall Edit 2 Operate key and move to Edit Press Enter key to enter editing test files EDIT PROGRAM Active Sequence 0987654321 3 Press numeric key to select test step and press En...

Page 45: ...top in case of test error Press Enter key PROGRAM Complete Stop Failure Stop 13 Determine whether to link to next group of test file If it is to link to second group press 2 key 0 means not to link to...

Page 46: ...minimum current value 0A After parameter setting in each step press ESC to exit setting menu Press Shift 4 key for saving Settings at each step should be independently saved Refer to the Correspondenc...

Page 47: ...1 0 08 30 0 1 500V 0 3A 0 01 1 1 8 1600 CR mode 1 range 0 3 300 0 100V 0 15A 8 7 5K 0 500V 0 3A resolution 16bit accuracy 0 2 0 01S 2 0 2 0 001S 3 CP mode 4 range 300W resolution 10mW accuracy 0 2 0...

Page 48: ...lue is less than 10 FS 0 2 0 1 Vin s b When current input value is less than 10 FS the load current precision is 0 2 xVin Rsetting 3mA 3 Range of resistance readback value 1 1 R 1 R 0 2 0 001 1 1 R 1...

Page 49: ...Technical Specification Copyright ITECH Electronic Co Ltd 41 Option Opt 2 110V 10 50Hz 60Hz Cooling method Fan cool...

Page 50: ...setting in procedure should be consistent with that in system menu of front board Press composite key Shift numeric key 8 to change if necessary Send a C or X character string to the load to pause dat...

Page 51: ...ernal wiring even it is with a appropriate DB9 interface The RS232 communication cable should have been connected to a correct serial port of the PC Communication Setup Please ensure the PC and the lo...

Page 52: ...RL1 enabled DT1 enabled 5 3 GPIB interface Only for IT8912E G Firstly connect load GPIB interface and computer GPIB card through IEEE488 bus and ensure sufficient contact Tighten them with screws Set...

Page 53: ...Length IT E301 10A 10A 1m IT E301 30A 30A 6mm2 1 2m IT E301 30A 30A 6mm2 2m IT E301 60A 60A 20mm2 1 5m IT E301 120A 120A 50mm2 2m IT E301 240A 240A 70mm2 1m IT E301 240A 240A 70mm2 2m IT E301 360A 36...

Page 54: ...tact Us Thanks for purchasing ITECH products In case of any doubts please contact us as follows 1 Visit ITECH website www itechate com 2 Select the most convenient contact method for further informati...

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