ITech IT8912E Скачать руководство пользователя страница 41 | Manualshive

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Function

and Features

Copyright ©ITECH Electronic Co., Ltd.

33

Load working range when VON LATCH is started

3.18 Protective function

The load is provided with following protective functions: overvoltage protection
(OVP),

overcurrent

protection

(OCP),

overpower

protection

(OPP),

overtemperature protection (OTP) and input reverse polarity protection
(LRV/RRV).

If any one of the above protections is enabled, the load will have corresponding
actions. Press any key on the front board to reset protection functions. For
example, in case of overtemperature protection, the load will give alarm and the
input will automatically switch to OFF status. The load VFD will display OTP.

3.18.1

Overvoltage protection (OVP)

The load will be immediately OFF and the buzzer will sound if the overvoltage
circuit is triggered. OV and PWM bits of the status register will be set and OVP
will be displayed on the screen of the load 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
power to be tested.

Clear overvoltage protection status

Inspect whether voltage of object under test is within load rated voltage or set
protection voltage range. If not, disconnect the object. Press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OVP) word will get cleared and the load will exit OVP protection status.

3.18.2

Overcurrent protection (OCP)

The electronic load is provided with two kinds of overcurrent protections:
hardware overcurrent protection and software overcurrent protection.

⚫

Hardware overcurrent protection: maximum load current of the electronic

load is limited within about 110% of the existing current range by hardware.
When the hardware triggers overcurrent protection, OC bit of the status
register will be set; when such protection is removed, the OC bit will be
reset. The On/Off status of load will not be changed by the hardware

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Содержание IT8912E

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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