ITech IT8900 Series User Manual
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ITech IT8900 Series User Manual

Programmable dc electronic load
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Programmable DC Electronic
Load
Series IT8900 User's Manual
Model: Series IT8900
Revision: V1.5

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Summary of Contents for ITech IT8900 Series

  • Page 1 Programmable DC Electronic Load Series IT8900 User’s Manual Model: Series IT8900 Revision: V1.5...
  • Page 2 IT8900 User Manual Notices Warranty Safety Notices © Itech Electronic, Co., Ltd. 2019 The materials contained in this No part of this manual may be document are provided “as is” , and reproduced in any form or by any means...

  • Page 3: Warranty Service

    ITECH, and ITECH will be responsible for return freight.  If the product is sent to ITECH for warranty service from other countries, the customer will be responsible for all the freight, duties and other taxes. Limitation of Warranty...

  • Page 4: Safety Precautions

    In case of failure to follow these precautions or specific warnings in other parts of the manual, violation against the safety standards related to the design, manufacture and purpose of the instrument will occur. If the user does not follow these precautions, ITECH will bear no responsibility arising there from. ...

  • Page 5: Environmental Conditions

     Do not block the air vent of the equipment. Environmental conditions The IT8900 series electronic load can only be used indoors or in low condensation areas. The following table shows general environmental requirements for this instrument. Environmental conditions...

  • Page 6: Waste Electrical And Electronic Equipment (Weee) Directive

    According to the equipment classification in Annex I of the WEEE directive, this instrument belongs to the “Monitoring” product. If you want to return the unnecessary instrument, please contact the nearest sales office of ITECH. Copyright © ITECH Electronic Co., Ltd.

  • Page 7: Compliance Information

    Connection of the instrument to a test object may produce radiations beyond the specified limit. Use high-performance shielded interface cable to ensure conformity with the EMC standards listed above. Safety Standard IEC 61010-1:2010/ EN 61010-1:2010 Copyright © ITECH Electronic Co., Ltd.

  • Page 8: Table Of Contents

    3.19 Terminal function of rear panel ........................46 3.19.1 Remote sense compensation functions ..................... 47 3.19.2 External trigger function ........................... 47 3.19.3 External analog quantity test ........................48 3.19.4 External On/Off Control ..........................48 3.19.5 Voltage fault indication ..........................48 Copyright © ITECH Electronic Co., Ltd.
  • Page 9 5.1 RS232 Interface ..............................82 5.2 USB Interface ..............................83 5.3 GPIB Interface ..............................84 5.4 LAN Interface ..............................84 5.5 CAN Interface ..............................84 Appendix ................................86 Specifications of Red and Black Test Lines ....................... 86 Copyright © ITECH Electronic Co., Ltd.

  • Page 10: Chapter1 Inspection And Installation

    After confirming that package contents are consistent and correct, please appropriately keep package box and related contents. The package requirements should be met when the instrument is returned to factory for repair. The IT8900 series load output test lines is shown in the following table. Colour Specification (Length: 2 meters)
  • Page 11 Installation Inspection size.  IT8915-150-960/ IT8912-600-480/ IT8912-1200-240 load, refer to the following dimension drawing:  IT8915-150-1200/IT8918-600-720/ IT8918-1200-360/ IT8922-150-1440/ IT8924-600-960/ IT8924-1200-480/ IT8930-150-1920 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 12 Installation Inspection  IT8948-600-1920/ IT8948-1200-960 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 13 Installation Inspection  IT8930-600-1200/ IT8930-1200-600/ IT8937-150-2400 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 14 Installation Inspection  IT8936-600-1440/ IT8936-1200-720/ IT8945-150-2500 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 15 Installation Inspection  IT8960-600-2400/IT8960-1200-1200/IT8972-600-2500/ IT8972-1200-1440/ IT8990-150-2500 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 16 Installation Inspection  IT8990-600-2400/IT89135-150-2500/IT89108-600-2500/ IT89108-1200-720 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.
  • Page 17 Installation Inspection  IT89150-600-2400 load, refer to the following dimension drawing: Copyright © ITECH Electronic Co., Ltd.

  • Page 18: Connecting The Cabinet

    Inspection 1.3 Connecting the cabinet Over 48KW models of IT8900 series consist of two or three cabinets. The cabinet with front panel is the system master and others are slaves. The user needs to connect system bus and load input terminals among cabinets.

  • Page 19: Connecting Test Lines

    A summary of connection procedures is given below. Connecting the power cord 1.5 Connecting Test Lines The test cables of IT8900 series are the standard accessories shipped with the package box. Please refer to 1.1 Verifying the Shipment for the specification of test cables.
  • Page 20  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 current.

  • Page 21: Chapter2 Quick Start

    Quick Chapter2 Quick Start This Chapter will introduce power-on check steps of IT8900 Series to ensure normal start-up and usage under initialization status of the load. Besides, to facilitate usage, this part also displays the functions of front board, rear board...

  • Page 22: Front Panel Introduction

    37U*5 Note  The naming rule of the IT8900 series is IT89XX-YY-ZZ, where XX represents the rated power of the model, YY represents the rated voltage and ZZ represents the rated current.  Different models of the IT8900 series have the same functions and characteristics. Only the look and the rated voltage/current/power are different.

  • Page 23: Keyboard Introduction

    Shift + 2 (Tran) To set dynamic operation parameters. Shift + 3 (List) To set list operation function. Shift + 4 (Save) To save existing setting load parameter values, e.g., voltage, current and power. Copyright © ITECH Electronic Co., Ltd.

  • Page 24: Function Description Of Vfd Status Indicators

    Send command under remote Addr Start keyboard locking function. operation. SRQ Serial request query. Shift Shift key is pressed. 2.6 Rear Panel Introduction Schematic Diagram of Rear Panel of IT8900 series (15U) electronic load. Copyright © ITECH Electronic Co., Ltd.
  • Page 25 External analog 0-10 V control terminal and remote sense compensation terminal Note U and 37U rear panel terminals are exactly the same, please refer to the above description, the following will not be repeated. Copyright © ITECH Electronic Co., Ltd.
  • Page 26 Start Quick Schematic Diagram of Rear Panel of IT8900 series (27U) electronic load. Rear panel terminal AC power switch and AC power input terminal Copyright © ITECH Electronic Co., Ltd.
  • Page 27 Start Quick Schematic Diagram of Rear Panel of IT8900 series (37U) electronic load. Rear panel terminal AC power switch and AC power input terminal Copyright © ITECH Electronic Co., Ltd.

  • Page 28: Power-On Selftest

    Start Quick Schematic Diagram of Rear Panel of IT8900 series (37U*3) electronic load. Slave load input terminals Slave system bus terminals Parallel input terminals, used to connect with slave load input terminals Rear panel terminal Parallel input terminals, used to connect with slave load input terminals...
  • Page 29 To avoid burning out, pay attention to marks of positive and negative polarities before wiring. Power Switch Introduction User can press the power switch of IT8900 series electronic load directly to turn on or turn off the instrument. The status of Powe switch are as follows. Selftest steps Normal selftest procedures: Correctly connect the power line.
  • Page 30 Yes => 3 No => Please check the Power key to start power and check whether the exception is removed. Check whether set power voltage of electronic load is larger than the power supply voltage. Copyright © ITECH Electronic Co., Ltd.

  • Page 31: Chapter3 Function And Features

    The electronic mode can work under the 4 constant-state operation modes:  Constant current operation mode (CC)  Constant voltage operation mode (CV)  Constant resistance operation mode (CR)  Constant power operation mode (CW) Copyright © ITECH Electronic Co., Ltd.

  • Page 32: Constant Current Operation Mode (Cc)

    Low=0.000V Set high and low rate and press [Enter] key. Constant Current High-Rate Low-Rate Set ascending slope and press [Enter] key. Constant Current Rise up=0.000A/uS Set descending slope and press [Enter] key. Constant Current Copyright © ITECH Electronic Co., Ltd.

  • Page 33: Constant Voltage Operation Mode (Cv)

    Set maximum working voltage value and press [Enter] for confirmation. Constant Voltage Range=2.33V Set maximum current value and press [Enter] key. Constant Voltage High=66.000A Set minimum current value and press [Enter] key. Constant Voltage Low=0.0000A Complete parameter setting. Copyright © ITECH Electronic Co., Ltd.

  • Page 34: Constant Resistance Operation Mode (Cr)

    Set maximum working resistance value and press [Enter] for confirmation. Constant Resistance Range=2000.0Ω Set maximum voltage value and press [Enter] key. Constant Resistance High=130.0V Set minimum voltage value and press [Enter] key. Constant Resistance Low=0.000V Complete parameter setting. 10.0000V 0.0000A 0.00W CR=2.000Ω Copyright © ITECH Electronic Co., Ltd.

  • Page 35: Constant Power Operation Mode (Cw)

    Constant Power Range =300.00W Set maximum voltage value and press [Enter] key. Constant Power High=130.00V Set minimum voltage value and press [Enter] key. Constant Power Low=0.000V Complete parameter setting. 10.0000V 0.0000A 0.00W CW=1.00W Note Copyright © ITECH Electronic Co., Ltd.

  • Page 36: Input Control Function

    No update (Recover to original value at ON/OFF). TRIGGER SOURCE Set triggering mode. Manual(Def) Manual trigger. External External signal trigger mode. Trigger Hold Trig: IMM valid. GPIB bus trigger mode. Timer Timer trigger mode. Copyright © ITECH Electronic Co., Ltd.
  • Page 37 This parameter determines the state of electronic load after power up. If you select “Rst”, the default input parameter settings will be active after power up. The default setup is 0V and 0A. If you select “Sav0”, then the electronic load will Copyright © ITECH Electronic Co., Ltd.

  • Page 38: Configuration Menu Function (Config)

    Set LOAD ON timer value. Stop function. MEASURE MENU V-Range Auto switch function of voltage range. VOLTAGE AUTO RANGE Measure Start auto voltage range. Stop auto voltage range. Time V Measure voltage rise/fall time. Copyright © ITECH Electronic Co., Ltd.

  • Page 39: Triggering Function

    (TRIG:IMM), the load will trigger an operation. Select the triggering sources as follows: Operation steps Press [Shift] + 8(System) to enter system menu setting screen. Initialize Power-ON Buzzer Press to move to the Trigger and press [Enter] to enter Copyright © ITECH Electronic Co., Ltd.

  • Page 40: Dynamic Test Function

    Press [Shift] + 2 (Tran) keys. TRANSITION Operate key and move to On. Press [Enter] key and select Continuous. Press [Enter] key (The Trig lamp that indicates VFD screen status is on). TRANSITION Continuous Pulse Toggle Copyright © ITECH Electronic Co., Ltd.

  • Page 41: Pulse Mode

    Under pulse mode, after enabling dynamic test operation, the load will switch to A value after receiving of a trigger signal. Then the load will switch back to B value and be constant at B value after maintaining A for pulse width time. Copyright © ITECH Electronic Co., Ltd.
  • Page 42 The load will switch after receipt of every trigger signal. The load will continuously switch between A and B value. Time of operations is shown at bottom right. 12. Press [CC]/ [CV]/ [CR]/ [CW] key or any composite function key to exit Copyright © ITECH Electronic Co., Ltd.

  • Page 43: Toggle Mode

    TRANSITION Rise down=2.000A/uS Set A value and press [Enter] key. TRANSITION Level A=1A Set B value and press [Enter] key. TRANSITION Level B=2A Start dynamic test and operate key. Move to on and press Copyright © ITECH Electronic Co., Ltd.

  • Page 44: Ocp Test Function

    3.10 OCP test function The IT8900 series electronic load is provided with overcurrent protection test function (OCP). Under OCP 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.

  • Page 45: Opp Test Function

    STOP 3.11 OPP test function The IT8900 series electronic load is provided with overpower protection test function (OPP). Under OPP 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.

  • Page 46: Battery Discharge Test Function

    STOP 3.12 Battery discharge test function In the IT8900 series electronic load, constant current mode is applied for discharge test with programmatic setting of stop voltage/capacity/discharging time If stop voltage is set as the stop condition, the system determines whether the battery is about to reach the set threshold value or unsafe status when the battery voltage is low, and if yes, an automatic stop will be activated.

  • Page 47: Cr-Led Test Function

    Press [Esc] key to exit battery capacity test mode in any three methods. 3.13 CR-LED test function With adding of diode break-over voltage setting in the IT8900 series electronic load under conventional CR mode, the electronic load only works when voltage applied at its both ends is higher than the diode break-over voltage to give a real simulation of diode working principle, i.e., the ripple current at real LED test.

  • Page 48: Measurement Of Voltage Or Current Rise/Fall Time

    R=(0.2*50V)/0.2A=50Ω. 3.14 Measurement of voltage or current rise/fall time The IT8900 series electronic load is provided with special voltage or current rise/fall time measurement function. This function gives a simple analog of voltage or current rise/fall speed of oscilloscope test power.

  • Page 49: Configuration Save Function

    If the operator needs to save configured parameter values for direct recall in follow-up operation, refer to the steps below: E.g., power supply 6V and 3A. The electronic load works under constant current (CC) 1A. Save "CC 1A" in register 9 for recall.  SAVE Copyright © ITECH Electronic Co., Ltd.

  • Page 50: Von Function

    When VON LIVING function is started, the load starts load test only when the power voltage rises and is higher than Von Point loading voltage. When the power voltage drops and is lower than Von Point unloading voltage, the load will not unload. Copyright © ITECH Electronic Co., Ltd.

  • Page 51: 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). Overvoltage protection (OVP)  Overvoltage protection: The load will be immediately OFF and the buzzer Copyright © ITECH Electronic Co., Ltd.
  • Page 52 If not, disconnect the object. Press any key on load front board (or send command to PROTection:CLEar), the load front board (OPP) word will get cleared and the load will exit OPP protection status. Copyright © ITECH Electronic Co., Ltd.

  • Page 53: List Operation

    It is assumed that output voltage and current of the tested instrument are 10V and 3A respectively and the load is under CC mode. Trigger List count=1 List count=2 List sequence Edit the LIST file and trigger to operate this file. Operation steps: Copyright © ITECH Electronic Co., Ltd.
  • Page 54 Press [Enter] key (The Trig lamp that indicates VFD screen status is on). Press [Esc] key to exit setting. LIST On Recall Edit 14. Press [On/Off] key to open input and press [Shift] + .(Trigger) key (Triggering key). Copyright © ITECH Electronic Co., Ltd.

  • Page 55: Terminal Function Of Rear Panel

    Negative input terminal for TRIG, ON and VF TRIG Positive input terminal for trigger Positive input terminal for external On/Off control Positive input terminal for voltage fault indication EXT PRG+, EXT PRG- External analog control terminal Sense+, Sense- Remote sense terminal Copyright © ITECH Electronic Co., Ltd.

  • Page 56: Remote Sense Compensation Functions

    When external trigger is selected, the positive and negative TRIG terminals will generate trigger signal and the low pulse is valid. Input corresponding to one trigger can be used for triggering dynamic test, LIST test and auto test. Copyright © ITECH Electronic Co., Ltd.

  • Page 57: External Analog Quantity Test

    3.20 Auto Test Function The IT8900 series electronic load delivers strong auto test functions, which can analog several tests. A total of 10 groups of test files can be edited, and each group test file has 10 steps. Therefore, a maximum of 100 steps can be edited and saved in EEPROM.
  • Page 58 SEQ02 Off Time=2S 11. Set test delay time of step 2. If 1S is required, directly press 1 key. Press [Enter] key. Tpf is delay time before measurement. EDIT PROGRAM SEQ02 P/F Delay Time=1S Copyright © ITECH Electronic Co., Ltd.
  • Page 59 [CV] (Setup) to enter parameter setting. 10.0000V 0.0000A 0.00W CC=1.000A 17. It is assumed that step 1 edits CC mode as follows: current: 2A, maximum voltage value: 10V, and minimum voltage value: 2V; and step 2 edits CV Copyright © ITECH Electronic Co., Ltd.

  • Page 60: Parallel Function

    This series of electronic load supports mutual parallel operation of same models and to increase input power and input current. The figure below shows 3 pcs electronic load in parallel, in which, the system bus is used for master-slave connection . Copyright © ITECH Electronic Co., Ltd.
  • Page 61 If the resistance is removed, the instrument may not work properly. The user can install the terminal matching resistance on the Input end of the first system bus and the Output end of the last system bus. Copyright © ITECH Electronic Co., Ltd.

  • Page 62: Chapter4 Technical Specifications

    Overtemperat ≒85℃ protection Specification ≒52A ≒520A Current (CC) Short circuit Voltage (CV) ≒8mΩ ≒8mΩ Resistance (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full Copyright © ITECH Electronic Co., Ltd.
  • Page 63 ±(0.2%+0.3%FS) Protection range Overpower ≒12.1KW protection Overcurrent ≒26.4A ≒264A protection Overvoltage ≒1250V protection Overtemperat ≒85℃ protection Specification ≒26.4A ≒264A Current (CC) Short circuit Voltage (CV) ≒21mΩ ≒21mΩ Resistance (CR) Input terminal ≒2MΩ impedance Dimension Copyright © ITECH Electronic Co., Ltd.
  • Page 64 Overtemperature ≒85℃ protection Specification ≒105A ≒1050A Current (CC) Short circuit Voltage (CV) ≒2mΩ ≒2mΩ Resistance (CR) Input terminal ≒300KΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full Copyright © ITECH Electronic Co., Ltd.
  • Page 65 Overtemperature ≒85℃ protection Specification ≒132A ≒1320A Current (CC) Short circuit Voltage (CV) ≒1.8mΩ ≒1.8mΩ Resistance (CR) Input terminal ≒300KΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). Copyright © ITECH Electronic Co., Ltd.
  • Page 66 Current (CC) Short circuit Voltage (CV) ≒6mΩ ≒6mΩ Resistance (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is Copyright © ITECH Electronic Co., Ltd.
  • Page 67 Current (CC) Short circuit Voltage (CV) ≒15mΩ ≒15mΩ Resistance (CR) Input terminal ≒2MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). Copyright © ITECH Electronic Co., Ltd.
  • Page 68 Resistance (CR) Input terminal ≒300KΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 69 Resistance (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 70 Resistance (CR) Input terminal ≒2MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 71 Resistance (CR) Input terminal ≒300KΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 72 Resistance (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 73 Resistance (CR) Input terminal ≒2MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 74 Resistance (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 75 Resistance (CR) Input terminal ≒2MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 76 Resistance (CR) Input terminal ≒300KΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 77 Resistance (CR) Input terminal impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 78 (CR) Input terminal ≒1MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 79 (CR) Input terminal ≒2MΩ impedance Dimension *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 80 Input terminal ≒300KΩ impedance Dimension 24U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 81 Input terminal ≒1MΩ impedance Dimension 37U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 82 Input terminal ≒2MΩ impedance Dimension 37U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 83 Input terminal ≒1MΩ impedance Dimension 37U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 84 Input terminal ≒2MΩ impedance Dimension 37U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 85 Input terminal ≒300KΩ impedance Dimension 37U*2 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 86 Input terminal ≒1MΩ impedance Dimension 37U*3 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 87 Input terminal ≒1MΩ impedance Dimension 37U*3 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 88 Input terminal ≒2MΩ impedance Dimension 37U*3 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 89 Input terminal ≒300KΩ impedance Dimension 37U*3 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. Copyright © ITECH Electronic Co., Ltd.
  • Page 90 *1.The voltage/current input is no less than 10%FS (FS indicates the full scope). *2.The scope of read-back resistance is (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08)). *3.The voltage/current input is no less than 10%FS. *The above specifications may be subject to change without prior notice. Copyright © ITECH Electronic Co., Ltd.

  • Page 91: Chapter5 References Of Load Communication Interfaces

    Load Communication Interfaces References Chapter5 References of Load Communication Interfaces IT8900 series electronic load is provided with five communication interfaces to communicate with a computer for selection, including S232, USB, GPIB, CAN and LAN. 5.1 RS232 Interface Cable connection load with both ends of COM interface (DB9) and computer.

  • Page 92: Usb Interface

    TRIGGER command to the functional layer. The functions of load USB488 device are as follows:  Capable to read all common SCPI commands.  SR1 enabled.  RL1 enabled.  DT1 enabled. Copyright © ITECH Electronic Co., Ltd.

  • Page 93: Gpib Interface

    The interface cable is correctly connected (CAN_H to CAN_H, CAN_L to CAN_L). Check whether 120 Ω terminal resistance is connected. Setting Communication Before running communication, please match the load parameters with the PC Copyright © ITECH Electronic Co., Ltd.
  • Page 94 Prescale (Pres): Not settable. Change with Baud rate setting. PTS (BS1): Not settable. Change with Baud rate setting. PBS (BS2): Not settable. Change with Baud rate setting. Baud rate (Prescale) 100K 125K 200K 250K 400K 500K 1000K Copyright © ITECH Electronic Co., Ltd.

  • Page 95: Appendix

    Specifications of Red and Black Test Lines ITECH provides you with optional red and black test lines, which individual sales and you can select for test. For specifications of ITECH test lines and maximum current values, refer to the table below.
  • Page 96 Contact Us Thanks for purchasing ITECH products. In case of any doubts, please contact us as follows: 1. Refer to accompanying data disk and relevant manual. 2. Visit ITECH website: www.itechate.com. 3. Select the most convenient contact method for further information.

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