Page 1 Regenerative Power System IT-M3900B Series User Manual Model: IT-M3900B Series Version: V1.0/01,2022...
Page 2 CAUTION sign until the in- pose. ITECH shall not be held liable Manual Part Number dicated conditions are for errors or for incidental or indirect fully understood and met.
Page 3: Warranty
Warranty ITECH warrants that the product will be free from defects in material and work- manship under normal use for a period of one (1) year from the date of delivery (except those described in the Limitation of Warranty below).
Page 4: Safety Symbols
Failure to comply with these precautions or specific warn- ings elsewhere in this manual will constitute a default under safety standards of design, manufacture and intended use of the instrument. ITECH assumes no li- ability for the customer’s failure to comply with these precautions.
Page 5 This instrument is used for industrial purposes, do not apply this product to IT power supply system. • Never use the instrument with a life-support system or any other equipment subject to safety requirements. Copyright © Itech Electronic Co., Ltd.
Page 6: Environmental Conditions
Make sure the vent hole is always unblocked. Environmental Conditions The instrument is designed for indoor use and an area with low condensation. The table below shows the general environmental requirements for the instrument. Copyright © Itech Electronic Co., Ltd.
Page 7: Regulation Tag
The service life of the product is 10 years. The product can be used safely within the environmental protection period; oth- erwise, the product should be put into the recycling system. Copyright © Itech Electronic Co., Ltd.
Page 8: Waste Electrical And Electronic Equipment (Weee) Directive
According to the equipment classifi- cation in Annex I of the WEEE direc- tive, this instrument belongs to the “Monitoring” product. If you want to return the unnecessary instrument, please contact the near- est sales office of ITECH. Copyright © Itech Electronic Co., Ltd.
Page 9: Compliance Information
2. Connection of the instrument to a test object may produce radiations beyond the specified limit. 3. Use high-performance shielded interface cable to ensure conformity with the EMC standards listed above. Safety Standard IEC 61010-1:2010+A1:2016 Copyright © Itech Electronic Co., Ltd.
Page 10: Table Of Contents
4.5.4 Set Under-Current Protection (UCP)............63 4.5.5 Set Under-Voltage Protection (UVP)............64 4.5.6 Over-Temperature Protection (OTP)............65 4.5.7 Sense Reverse Protection................65 4.6 Function Menu for Power Supply................66 4.6.1 LIST Function ....................66 Copyright © Itech Electronic Co., Ltd. VIII...
Page 11 6.17 Display Loading Time (Disp on timer)..............198 6.18 System Upgrade ....................199 7 Technical Specification ....................202 7.1 Main Specification....................202 7.1.1 IT-M3901B-10-170.................... 203 7.1.2 IT-M3903B-10-340.................... 207 7.1.3 IT-M3905B-10-510.................... 211 7.1.4 IT-M3910B-10-1020..................215 7.1.5 IT-M3906B-80-120.................... 219 Copyright © Itech Electronic Co., Ltd.
Page 12 8 Routine Maintenance ..................... 233 8.1 Instrument Self-Test..................... 233 8.2 Cleaning and Maintenance .................. 233 8.3 Contact of ITECH Engineers ................234 8.4 Return for Repair....................235 A Appendix ........................237 A.1 Specifications of Red and Black Test Cables ............. 237 A.2 Fuse Replacement ....................
Page 13: Quick Reference
• 2 in 1 unit - a bidirectional power supply and a regenerative load • One button switch between source and load on front panel • Compact design, 1U@6kW, 2U@12kW • Voltage range: 10~1500V Copyright © Itech Electronic Co., Ltd.
Page 14 *1 10V models don't have this function. Voltage Model Power Height Current Level IT-M3901B-10-170 170A 1.7KW IT-M3903B-10-340 340A 3.4KW IT-M3905B-10-510 510A 5.1KW IT-M3910B-10-1020 1020A 10.2KW IT-M3902B-32-80 IT-M3904B-32-160 160A IT-M3906B-32-240 240A IT-M3912B-32-480 480A 12KW IT-M3902B-80-40 Copyright © Itech Electronic Co., Ltd.
Page 15: Front-Panel Overview
For example, the maximum rated value of the output power of the IT3906B- 80-120 model is 6000W, and the maximum rated value of input power is also 6,000W. 1.2 Front-Panel Overview The front panel of this series of instruments is shown in the figure below. Copyright © Itech Electronic Co., Ltd.
Page 16: Keyboard Introduction
6 Up, down, left, and right cursor navigation tion port keys and Enter key 3 Vacuum fluorescent display 7 Push-on knob (VFD) 4 Function and composite keys 1.3 Keyboard Introduction The keyboard introduction of this series instrument is shown as follows. Copyright © Itech Electronic Co., Ltd.
Page 17 Enter the Protect menu. The Protect parameters are different under Source mode and Load mode. (1U Model) [On/Off] Power supply output or load input on/off key [V-set] Source mode: Set the output voltage value Copyright © Itech Electronic Co., Ltd.
Page 18 Positive and negative signs Decimal point Left / Right The left and right navigation keys are used to adjust the cur- navigation sor to the specified position or scrolls pages to view menu keys items. Copyright © Itech Electronic Co., Ltd.
Page 19: Push-On Knob
Turn the keyboard lock on or off. [Shift]+[3] (Local) Switch remote control mode to local control mode. 1.4 Push-on Knob This series Regenerative Power System provides a knob on the front panel as shown in the next figure. Copyright © Itech Electronic Co., Ltd.
Page 20: Rear Panel Introduction
[Enter] key to confirm the operation. 1.5 Rear Panel Introduction The rear panel of the of the this series model (after removing the protective cov- er) is shown below. 1U Models Copyright © Itech Electronic Co., Ltd.
Page 21: Vfd Indicator Lamps Description
Load mode: The in- put of the load is turned off. Source mode: The Rear Analog function begin to power supply is in a work. Copyright © Itech Electronic Co., Ltd.
Page 22 Source mode: The power supply is in a state of constant power output. Load mode: The load is in a constant power input state. Copyright © Itech Electronic Co., Ltd.
Page 23: Configuration Menu Function
Speed= High/Low high speed / low speed Displays the voltage or current rise time V-Rise Time/I-Rise Time setting according to the selected priority = 0.001s mode. If CC priority mode is selected, Copyright © Itech Electronic Co., Ltd.
Page 24 The descriptions of configuration menu of the load are listed in the table below. Config Configuration menu of the load Set the operation mode Mode Constant current operation mode Constant voltage operation mode Constant power operation mode Constant resistance operation mode CV+CC complex operation mode CVCC Copyright © Itech Electronic Co., Ltd.
Page 25: System Menu Function
1.8 System Menu Function This Chapter offers a general introduction of system menus, allowing users to have a preliminary understanding of system functions of this series instrument. The steps of the system menu function are as follows: Copyright © Itech Electronic Co., Ltd.
Page 26 Set the trigger method for the List files running. Immediate Trigger immediately Manual trigger Manual Bus trigger External trigger External DLogTrig Source Set the trigger method for the data logging. Immediate Trigger immediately Manual trigger Manual Bus trigger Copyright © Itech Electronic Co., Ltd.
Page 27 Configure LAN IP information. IP-Conf Configure LAN IP mode. IP-Mode Auto: automatically configure the address of the instrument. Manual: manually configure the address of the instrument. • IP: 0.0.0.0 Set the IP address. • Mask: 0.0.0.0 Copyright © Itech Electronic Co., Ltd.
Page 28 Web: Web service state. • • VX-11: VX-11 service state. • • Raw-socket: Raw-socket serv- ice state. • • Select whether to reset the LAN to the de- fault settings or not. Restore • Copyright © Itech Electronic Co., Ltd.
Page 29 6.11 Digital I/O Function (Digital Port). IO-1. Ps-Clear, Not- Function setting of pin 1 Invert Function setting of pin 2 IO-2. Ps, Not-Invert IO-3. Off-Status, Not- Function setting of pin 3 Invert Copyright © Itech Electronic Co., Ltd.
Page 30: Options Introduction
– IT-E176: Interface card for GPIB communication. When users need to use GPIB communication, they can choose to purchase this accessory. For details, see 2.5.4 GPIB Interface (Optional). – IT-E177: Interface card that includes RS-232 communication interface, external analog and other functions. Copyright © Itech Electronic Co., Ltd.
Page 31 Other- wise, the function is abnormal and cannot be used. 8 / 9 / Terminals for external analog function. For details, see 6.12 Source Analogue Function (Ext-Program) (Optional) 6.13 loadAnalogue Function (Ext-Program) (Optional). Copyright © Itech Electronic Co., Ltd.
Page 32 • IT-E165B: Anti electromotive force module It is suitable for motor products, which can prevent the electromotive force generated during the operation of the motor from damaging the power sup- ply products. Copyright © Itech Electronic Co., Ltd.
Page 33: Inspection And Installation
Depending on the instru- ment model. For details, see 2.3 Con- necting the Power Cord. USB communication This accessory is se- cable lected when the USB in- terface is used for starting up remote operation. Copyright © Itech Electronic Co., Ltd.
Page 34: Instrument Size Introduction
The instrument should be installed at well-ventilated and rational-sized space. Please select appropriate space for installation based on the instrument size. The detailed dimension drawings of this series instrument are as follows (unit: mm, deviation: ±1 mm): Copyright © Itech Electronic Co., Ltd.
Page 36: Connecting The Power Cord
Inspection and Installation 2U Models 2.3 Connecting the Power Cord Precautions To prevent electric shock and damage to the instrument, observe the following precautions. Copyright © Itech Electronic Co., Ltd.
Page 37 Categories of Power Cords The standard power cord specifications for this series instruments are divided into the following types according to different regions: Copyright © Itech Electronic Co., Ltd.
Page 38 High Input 3-Phase 3-Phase Rated Output Range Range Range Power -145 180-200 200-264 180-264 342-520 1.7kW 1.7kW 1.7kW 1.7kW 1.7kW 3.4kW 2.3kW 3.4kW 3.4kW 5.1kW 2.3kW 3.5kW 5.1kW 10.2kW 4.6kW 7.1kW 10.2kW 2.3kW 3.5kW Copyright © Itech Electronic Co., Ltd.
Page 39 When the instrument is connected to the three phases of the three-phase power supply terminal, there is no need to pay attention to the current shar- ing problem, just connect it directly. The wiring diagram is as follows: Copyright © Itech Electronic Co., Ltd.
Page 40 2. Confirm that the power switch is in the OFF position and verify that there is no dangerous voltage on the connection terminals. 3. Remove the protective cover outside the AC input terminal on the rear panel. Copyright © Itech Electronic Co., Ltd.
Page 41: Connecting The Device Under Test (Dut)
2.4 Connecting the Device Under Test (DUT) This section describes how to connect the test cables between the instrument and DUT. Precautions To prevent electric shock and damage to the instrument, observe the following precautions. Copyright © Itech Electronic Co., Ltd.
Page 42 Provision must be made to disconnect the external energy source before touching the output or sense terminals. • Always use test cables provided by ITECH to connect the equip- ment. If test cables from other factories are used, please confirm the maximum current that the test cables can withstand.
Page 43 DUT and output terminals of the power system. To maximize measurement accuracy, the power system provides the remote measurement terminals VS+ and VS- on the rear panel, which can be used to measure the terminal voltage of the DUT. Copyright © Itech Electronic Co., Ltd.
Page 44 8. Connect the other end of the red and black cables to the DUT. The positive and negative poles must be properly connected and fastened when wiring. 9. Power on the instrument and turn on the Sense function of the instrument. For details, see 6.7 Sense Function (Sense). Copyright © Itech Electronic Co., Ltd.
Page 45: Remote Interface Connection
• VCP: Virtual serial port. For Win7 system, you can download IT-M3900 VCP driver from ITECH official website or contact technical support engineer; for Win10 system, you do not need to install VCP driver. The operation steps to change the USB interface type in System Menu are as follows.
Page 46: Lan Interface
PC, and the IP address should be at the same network segment with the PC’s IP address. • When the instrument and computer are connected to the router, an independent IP address must be assigned for the instrument. Copyright © Itech Electronic Co., Ltd.
Page 47 DHCP is unused or not functional. • DNS2: This field enters the secondary address of the server. Contact your LAN administrator for server details. The same numbering notation applies Copyright © Itech Electronic Co., Ltd.
Page 48 5. Rotate the knob to select the service you want to enable and press [Enter]. 6. Rotate the knob to select whether to enable the service and press [Enter]. – On: Indicates that the service is enabled. Copyright © Itech Electronic Co., Ltd.
Page 49 You can select different pages by clicking the buttons shown in the navigation bar on the left side of the window. The detailed descriptions are as follows. • Home：Web home interface, displays the model and appearance of the instrument; Copyright © Itech Electronic Co., Ltd.
Page 50 This page allows you to monitor and control the instrument; • LAN Configuration: Reconfigure the LAN parameters; • Manual: Go to the ITECH official website and view or download the relevant documents. • Upload: Performs a system upgrade. Click CONNECT to connect the PC with the instrument, then click Select File to select the system upgrade installation package (for example, itech_3900_P.itech), and then click UPLOAD performs the upgrade op-...
Page 51: Can Interface
2. Rotate the knob to select I/O and press [Enter]. 3. Press the Left/Right key to select CAN and press [Enter]. 4. Set the baud rate, address and other parameters, press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 52: Gpib Interface (Optional)
Please ensure that the screws have been screwed down in order to have a full connection. GPIB Configuration Each device on the GPIB (IEEE-488) interface must have a unique whole num- ber address between 1 and 30. Your computer’s GPIB interface card address Copyright © Itech Electronic Co., Ltd.
Page 53: Interface (Optional)
The definition of RS-232 pins are as follows. When using the RS-232 interface for communication, connect the pin 1, pin 2, and pin 3 of the IT-E177 to the PC. The pin description is as follows: Copyright © Itech Electronic Co., Ltd.
Page 54 The options are: N (no parity), O (odd parity), E (even parity). Stop bit The options are: 1/2 RS-232 Troubleshooting If you meet some problems when communicating with PC by RS-232 interface, please check the following items: Copyright © Itech Electronic Co., Ltd.
Page 55 Make sure the correct cable and adapter are connected. Note that internal wiring may not be correct even if the cable has a suitable plug; • The cable must be connected to the correct serial ports (COM1, COM2, etc) of PC. Copyright © Itech Electronic Co., Ltd.
Page 56: Getting Started
When you turn the POWER switch on for the first time after purchase, the instru- ment starts with its factory default settings. Each time thereafter, the instrument starts according to the setting that you selected as outlined in 6.6 Set the Power-on State (PowerOn). Copyright © Itech Electronic Co., Ltd.
Page 57 AC input power to the unit. Power Switch Introduction The power switch is located in the lower left corner of the front panel. The power switch is a button, and pressing once indicates ON and pressing again indicates OFF. Copyright © Itech Electronic Co., Ltd.
Page 58 Error message Error Description Eeprom Failure The EEPROM is damaged. Main FrameInitializeLost The system setting data is lost. Calibration Data Lost The factory calibration data in EE- PROM is lost. Copyright © Itech Electronic Co., Ltd.
Page 59 There can only be one single unit as the Master, and the other single units must be set to Slave. After the setting is completed, power off and restart each single unit. 5. If the instrument still does not start, contact ITECH technical support engineer. Copyright © Itech Electronic Co., Ltd.
Page 60: Source Mode/ Load Mode Switch
Getting Started 3.2 Source Mode/ Load Mode Switch The IT-M3900B series Regenerative Power System can be used as a bidirec- tional power supply or a load, which can be switched by [Source] and [Load] on the front panel. Source Mode...
Page 61: Use The Front Panel Menu
For example, the key beeper is set in System→- Beep. Set the Beep item to off or on. Please refer to 1.7 Configuration Menu Function, 1.8 System Menu Function and the corresponding chapters for de- tailed menu description. Copyright © Itech Electronic Co., Ltd.
Page 62: On/Off Control
DUT. If the power supply has no output after the output is turned on, check the voltage and current setting value, set the voltage and current to a non-zero value, and then turn on the output. Copyright © Itech Electronic Co., Ltd.
Page 63: Power Supply Function
When [I-set] key is pressed, the key light is lit and the output current value can be set. Press numeric keys or rotate the knob to adjust the value in the current setting area indicated by the cursor. This value takes effect when you press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 64: Set The Output Power
Do not use CV priority mode with low-impedance sources such as batteries, power supplies, or large charged capacitors. Copyright © Itech Electronic Co., Ltd.
Page 65 When the output voltage exceeds the over-voltage protection setting, the output will shut down. Copyright © Itech Electronic Co., Ltd.
Page 66 A CC (constant current) status flag indicates that the output current is being regulated and the output voltage is within its limit settings. Copyright © Itech Electronic Co., Ltd.
Page 67 Press the [I-set] key on the front panel to set the output current value b. Press the [V-set] key on the front panel to set the voltage upper limit Vh, and press [V-set] again to set the voltage lower limit Vl. Copyright © Itech Electronic Co., Ltd.
Page 68: Set The Internal Resistance
Set the DUT (power supply) to output 80V, 10A. At this time, 10Ω in sink mode (according to the formula I=U/R, sink current is 80÷10=8A), due to the limitation of Is=–5A in CC priority mode, the actual Copyright © Itech Electronic Co., Ltd.
Page 69: Set The Output-On/Output-Off Delay
Protection function menu for the power supply Protect Overvoltage protection Turn the OVP function off. (Def) Turn the OVP function on. Level OVP limit Protection delay time, Delay Protection Delay. Overcurrent protection Turn the OCP function off. (Def) Copyright © Itech Electronic Co., Ltd.
Page 70 Protection delay time, Delay Protection Delay. Undervoltage protection Turn the UVP function off. (Def) Turn the UVP function on. Indicates the instrument warm-up time. This time Warm-up is set to prevent the in- strument from triggering Copyright © Itech Electronic Co., Ltd.
Page 71 The first row shows the meter voltage and the meter current value. • The left side of the second row shows the specific protection information (such as overvoltage protection OVP), the right side shows the duration of Copyright © Itech Electronic Co., Ltd.
Page 72: Set Over-Voltage Protection (Ovp)
The external (AC input) inputs a higher voltage. • The power supply outputs a high voltage due to a fault. Please avoid inputting a external voltage higher than 120% rated value, or the instrument will be damaged. Copyright © Itech Electronic Co., Ltd.
Page 73: Set Over-Current Protection (Ocp)
(1U Model) 2. Press the composite keys [Shift]+[R-set] (Protect) on the front panel to en- ter the protection menu. (2U Model) 3. Rotate the knob to select 2. OCP (Off) and press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 74: Set Over-Power Protection (Opp)
4. Press the left/right key or rotate the knob to select On and press [Enter] to enter the setting interface. 5. Set the protection limit Level and the delay time Delay in sequence, and press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 75: Set Under-Current Protection (Ucp)
4. Press the left/right key or rotate the knob to select On and press [Enter] to enter the setting interface. 5. Set the warm-up time Warm-up, protection limit Level and delay time Delay in sequence, and then press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 76: Set Under-Voltage Protection (Uvp)
[Enter] to confirm. The VFD screen returns to the Protect menu and the UVP setting (take 10S, 1V, 1S as an example) is displayed as follows: PROTECT 5.UVP 10S, 1V, 1.000S Copyright © Itech Electronic Co., Ltd.
Page 77: Over-Temperature Protection (Otp)
When you return power to the instrument, verify that the cooling fan is running. If not, please contact ITECH Technical Support. Leaving the instrument powered on with an inoperative cooling fan may result in damage to the instrument.
Page 78: Function Menu For Power Supply
List file. After the file is edited completely, you can trigger the selected List file to run according to the selected trigger mode. The descriptions of list function menu are listed in the table below. Copyright © Itech Electronic Co., Ltd.
Page 79 Set the number of list file repetitions. Set the running state after the list program is run- State ning over. Last After the List program finishes run- ning, the output is kept as the Copyright © Itech Electronic Co., Ltd.
Page 80 3. Rotate the knob to select Edit and press [Enter] to enter the editing interface. 4. Select CC and press [Enter] to confirm. 5. Set the total number of steps in the List program and press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 81 6. Rotate the knob to select the List file. 7. Press the Left/Right key to select Load, press [Enter] to complete the im- port, and wait for the trigger to run this List file. Copyright © Itech Electronic Co., Ltd.
Page 82 The interface returns to the main interface of the LIST function, which is dis- played as follows: FUNCTION LIST Run Edit Open Export 7. Press the Left/Right key to select Export and press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 83 List file is triggered to run. • After the List file finishes running, the system determines whether to return to the working mode before the List is run according to the Normal or Last option you selected. Copyright © Itech Electronic Co., Ltd.
Page 84 Import via U disk The instrument supports importing the edited .csv format file (the template can be downloaded from ITECH official website or contact ITECH to obtain) through the USB interface on the front panel, and generating voltage or cur- rent values after parsing, and then outputting complex voltage or current waveforms according to the time width specified by the user.
Page 85: Battery Charging/Discharging Test Function
4.6.2 Battery Charging/Discharging Test Function This series power system provides the battery charging/discharging test func- tion based on its unique bidirectional power supply properties. Suitable for charging/discharging tests on all types of portable batteries. Copyright © Itech Electronic Co., Ltd.
Page 86 Set the voltage Charge / value for charging Discharge or discharging ac- cording to the se- lected test mode. Set the current val- Charge / ue for charging or Discharge I discharging Copyright © Itech Electronic Co., Ltd.
Page 87 (Charge I) or discharging current (Discharge I) and the other parameters, and then press [Enter] to confirm. After the parameter setting is completed, the interface returns to the Battery function main interface and displays as follows: FUNCTION BATTERY Run Edit Copyright © Itech Electronic Co., Ltd.
Page 88: Built-In Waveform Function
The protocols/standards involved in the built-in waveforms include the following: • DIN40839 • ISO16750-2 • ISO21848 • SAEJ1113–11 • LV123 • LV124 This series 10V model do not support built-in waveform function. Copyright © Itech Electronic Co., Ltd.
Page 89 Run the Vehicle Waveform After turning on [On/Off], the output of the vehicle waveform is triggered accord- ing to the selected trigger method. Copyright © Itech Electronic Co., Ltd.
Page 90 In this way, the user can create waveform between 8V to 32V. Evaluation of automotive starting DIN40839 waveform Select the automotive starting waveform with a starting voltage of 12V. Select the automotive starting waveform with a starting voltage of 24V. Copyright © Itech Electronic Co., Ltd.
Page 91 User-defined the automotive starting waveform. User-de- fined volt- V=8.00V age value DIN40839 for 12V System Steps Voltage (V) Current(A) Width(mS) Slope(mS) 2000 DIN40839 for 24V System Steps Voltage (V) Current(A) Width(mS) Slope(mS) 2000 Copyright © Itech Electronic Co., Ltd.
Page 92 12V; when the waveform program is divided into 16V-32V, the wave- form is consistent with the standard 24V waveform. The waveform diagram is shown below. How to Use Recall the self-defined DIN waveform operation (taking 12.5V voltage waveform as an example): Copyright © Itech Electronic Co., Ltd.
Page 93 This test is applicable to equipment with re- Reset-Test set function. The minimum supply voltage Us- min (Usmin≤80V) Usmin This test verifies the behavior of a DUT dur- Starting- ing and after cranking. Profile Select the 12V test system. Copyright © Itech Electronic Co., Ltd.
Page 94 Load-Dump Load dump curve Select centralized load dump Test A unsuppression Select the 12V voltage system Pulse width Peak voltage Select the 24V voltage system Pulse width Peak voltage Test B Select centralized load dump suppression Copyright © Itech Electronic Co., Ltd.
Page 95 This test simulates the effect when a conventional fuse element melts in another circuit. • 12V system • 24V system How to recall this waveform from menu (take 12V system as an example): Copyright © Itech Electronic Co., Ltd.
Page 96 2. Use the knob to select 3.Road-Vehicles = Off and press [Enter]. 3. Press the Left/Right key to select ISO16750-2 and press [Enter] to confirm. 4. Press the Left/Right key to select Reset-Test, and press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 97 Curve should be selected based on actual test requirements. To create waveform within 12V, follow the set standards as below: I, II, III, and IV defined in the above standard correspond to levels 1, 2, 3, and 4 in the setup menu. Copyright © Itech Electronic Co., Ltd.
Page 98 • The pulse duration of load dump is mainly determined by the time constant and pulse amplitude of the excitation circuit. Copyright © Itech Electronic Co., Ltd.
Page 99 ≤350 (ms) – – If not otherwise agreed, use the upper voltage level with the upper value for internal resistance or use the lower voltage level with the lower value for in- ternal resistance. Copyright © Itech Electronic Co., Ltd.
Page 100 ≤350 (ms) – – If not otherwise agreed, use the upper voltage level with the upper value for in- ternal resistance or use the lower voltage level with the lower value for internal resistance. Copyright © Itech Electronic Co., Ltd.
Page 101 8. Press [On/Off] on the front panel to turn on the output. 9. According to the selected trigger method (same as the trigger method of the LIST function), for example, press [Shift]+[On/Off](Trigger) to trigger the output of the waveform. Copyright © Itech Electronic Co., Ltd.
Page 102 LIST function), for example, press [Shift]+[On/Off](Trigger) to trigger the output of the waveform. Test Pulse max,dyn Detect the function when the DUT is under maximum dynamic Voltage U max,dyn and simulate the maximum dynamic Voltage of high-energy pulse raised from Copyright © Itech Electronic Co., Ltd.
Page 103 DUT, the rise and fall time be- tween U and 16V level shall not be longer than 100ms. • t: Time (in ms) • U: Voltage (in V) Copyright © Itech Electronic Co., Ltd.
Page 104 After turning on [On/Off] and triggering the waveform output, the instrument will apply the startup characteristic parameters as shown in the figure and table be- low to related input terminals of the DUT simultaneously. • t: Time time (in ms) t1: 5ms Copyright © Itech Electronic Co., Ltd.
Page 105 Test–4 Starter motor engagement disturbance pulse Select the 12V voltage system For details, see Table 4–1 Parameter Description Select the 24V voltage system For details, see Table 4–1 Parameter Description Test–5 Load dump waveform Copyright © Itech Electronic Co., Ltd.
Page 106 Test B Select centralized load dump suppression Select the 12V volt- age system Test pulse width Peak voltage Clamping voltage Select the 24V volt- age system Test pulse width Peak voltage Clamping voltage Copyright © Itech Electronic Co., Ltd.
Page 107 Power Supply Function Test–2B Transient from DC motors acting as generators after ignition switch OFF: Parameters ≤0.05Ω ≤0.05Ω 0.2–2s 0.2–2s 1ms±50% 1ms±50% 1ms±50% 1ms±50% 1ms±50% 1ms±50% Test–4 Starter motor engagement disturbance pulse. Copyright © Itech Electronic Co., Ltd.
Page 108 The relevant pa- rameters are introduced as follows: Please pay attention to whether the voltage value defined in the LV123 standard matches the rated voltage of the instrument, otherwise some waveforms cannot be recalled. Copyright © Itech Electronic Co., Ltd.
Page 109 Range of lower limited operating ca- limited pability, includes the following options: • HV_1 • HV_2a • HV_2b • HV_3 highly- Range of highly limited operating ca- limited pability, includes the following options: • HV_1 • HV_2a • HV_2b Copyright © Itech Electronic Co., Ltd.
Page 110 V4: Voltage in interval 4 upper- Range of upper limited operating ca- limited pability, with the following settings: • V1: Voltage in interval 1 • V2: Voltage in interval 2 • V3: Voltage in interval 3 Copyright © Itech Electronic Co., Ltd.
Page 111 Set the number of test repetitions, ranging from 1 to 65535. The actual number of test executions = count * Save To Set the save address of the waveform File file, range: 1~10. Copyright © Itech Electronic Co., Ltd.
Page 112 520V 140V 255V 350V 635V 300S 300S 300S 300S 300S 300S 300S 300S 10mS 12mS 300S 300S 300S 300S Actual num- Count*3 Count*3 Count*3 Count*3 ber of tests Upper-limited The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 113 190V 340V 450V 750V 200V 360V 470V 770V 190V 340V 450V 750V 195V 350V 460V 760V 140V 255V 350V 635V Actual Count*3 Count*3 Count*3 Count*3 number of tests Lower-limited The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 114 140V 255V 350V 635V 170V 250V 520V 160V 200V 450V 170V 250V 520V 165V 225V 485V 140V 255V 350V 635V Actual Count*3 Count*3 Count*3 Count*3 number of tests Highly-limited The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 115 255V 350V 10mS Actual number Count*3 Count*3 Count*3 of tests How to Use The following is an example of how to use this function by recalling the LV123 standard regulation Unlimited and HV_1 waveform. Copyright © Itech Electronic Co., Ltd.
Page 116 LV124 waveform protocol E-02 Transient overvoltage test waveform E-04 Jump start test waveform E-05 Load dump test waveform E-07 Slow decrease and increase of the supply voltage test waveform Ubmax Start voltage Ubmin Holding voltage Copyright © Itech Electronic Co., Ltd.
Page 117 These overvoltages are simulated by means of this test. This test may be used for the electrical life test. The test pulse of E-02 Transient overvoltage is shown in the figure below: Copyright © Itech Electronic Co., Ltd.
Page 118 Dumping of an electric load, in combination with a battery with reduced buffering ability, results in an energy-rich overvoltage pulse due to the generator charac- teristics. The test pulse of E-05 Load Dump is shown in the figure below: Copyright © Itech Electronic Co., Ltd.
Page 119 The reset behavior is represented by a voltage variance and a time variance. Two different test sequences are required to simulate different switchoff times. A component must always undergo both sequences. Copyright © Itech Electronic Co., Ltd.
Page 120 In order to cover both cases, two different test sequences are required. A component must al- ways undergo both sequences. • Cold Start Test Pulse • Warm Start Test Pulse Copyright © Itech Electronic Co., Ltd.
Page 121 The related parameters of the built-in waveform of the instrument are introduced as follows: LV148 LV148 E-01 Long-term overvoltages The component's resistance to long-term overvoltage is tested. A generator control fault during driving operation is simulated. E-02 Transient overvoltages Copyright © Itech Electronic Co., Ltd.
Page 122 0V and the sudden reconnect the system volt- age by a charged or new energy storage battery. T1 Holding Holding time Time T1 Rising Rising time Time E-08 Reset behavior Copyright © Itech Electronic Co., Ltd.
Page 123 E-18 Overvoltage range The test is to show the load cut-off during storage charging and check the changes of the operating behavior into the overvoltage range. E-01 The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 125 Power Supply Function E-03 The waveform is as follows: E-04 The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 127 Power Supply Function E-06B The waveform is as follows: E-07 The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 128 Power Supply Function T1 and tr1 need to be manually set by the user. E-08 The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 129 Power Supply Function E-10 The waveform is as follows: E-15 The waveform is as follows: Copyright © Itech Electronic Co., Ltd.
Page 132 1. Press the composite keys [Shift]+[I-set] (Function) on the front panel to en- ter the function menu. 2. Use the knob to select 3.Road-Vehicles = Off and press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 133: Battery Simulation Function
Initial Value load voltage. • Voc: The open-circuit voltage of the battery. • CAP: Battery capacity. Open or select a user-defined battery Open emulation file. Copyright © Itech Electronic Co., Ltd.
Page 134 Set the save address of Save To the user-defined battery Group emulation file. Select the battery simulation curve file for Curve testing. Run the currently selected battery sim- ulation curve file. Copyright © Itech Electronic Co., Ltd.
Page 135 • Edit battery simulation curve file 1. You can contact ITECH Technical Support to obtain a template for the battery simulation curve file (.csv format). 2. Use the Excel tool to open the template file, edit the relevant parameters, and save.
Page 136 7. Set the Initial Value and press [Enter]. The instrument will enter the battery simulation test mode and wait for the function to be triggered. 8. Turn on the [On/Off]. 9. Based on the selected trigger method, perform the trigger operation. Copyright © Itech Electronic Co., Ltd.
Page 137 Function menu item will be displayed, you can re-enter the Function menu for editing; if Reset is selected, it means to stop the present run- ning and return to the main interface to wait for the next trigger operation. Copyright © Itech Electronic Co., Ltd.
Page 138: Load Function
2. Press [Enter] key to enter into the parameter setting interface. 3. Press the Left / Right key or turn the knob to adjust the value of this parameter. 4. After the parameter settings are complete, press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 139: Basic Operation Mode
• Constant Resistance Operation Mode (CR) Under CR mode, the electronic load is equivalent to a constant resistance and will give linear change of current with input voltage change. As shown in Copyright © Itech Electronic Co., Ltd.
Page 140: Complex Operation Mode
When the voltage rises to exceed the set constant resistance for sinking, it will switch to CR mode for sinking. The CV+CR mode can be applied to the LED simulation and test the LED power supply to get the LED current ripple parameters. Copyright © Itech Electronic Co., Ltd.
Page 141 CW modes. It is suitable for lithium ion battery charger testing to get a com- plete V-I charging curve. Moreover, the auto mode can avoid damaging the UUT when the protection circuit is damaged. Copyright © Itech Electronic Co., Ltd.
Page 142: Set The Input-On/Input-Off Delay Time （On Delay/Off Delay
2. Use knob to select I-Rise Slope or I-Fall Slope and press [Enter] to confirm. 3. Use knob or the number keys to adjust the I-Rise / I-Fall Slope and press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 143: Set V-Rise / V-Fall Slope（V-Rise / V-Fall Slope
102% of current range. Under CV mode, short cir- cuit current is equivalent to that constant voltage value of load is 0 V. For 2U models, press the [Shift]+[.] (Short) key to switch short circuit status. Copyright © Itech Electronic Co., Ltd.
Page 144: Von Function（Von
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 unload. Copyright © Itech Electronic Co., Ltd.
Page 145 Von Point loading voltage. When the power voltage drops and is lower than Von Point unloading voltage, the load will unload. The procedures to set Von function are as follows. Copyright © Itech Electronic Co., Ltd.
Page 146: Advanced Feature
5.2 Advanced Feature 5.2.1 LIST Function The IT-M3900B series power system supports a total of 10 List files (List01 to List10), each of which can be set up to 200 steps. You need to edit the voltage/ current value, slope and time width of each step, or you can set repeat times (1 to 65535) for each List file.
Page 147 TX and RX of the fiber to realize List synchronization triggering between multiple units. None Turn off (default) Tout Turn on Save to Save the edited List program. group Copyright © Itech Electronic Co., Ltd.
Page 148 The procedures are as follows: 1. Insert the USB flash drive into the front panel USB connector. 2. Press the composite keys [Shift]+[I-set] (Function) on the front panel to en- ter the function menu. Copyright © Itech Electronic Co., Ltd.
Page 149 Supports exporting the internal List file to an external USB flash drive. The ex- ported List file is saved in .csv format. 1. Insert the USB flash drive into the front panel USB connector. Copyright © Itech Electronic Co., Ltd.
Page 150 At this point, the interface returns to the main interface of the system and Lxx/xxxx WTG is displayed in the lower right corner. 7. Turn on the [On/Off]. 8. Based on the selected trigger method, perform the trigger operation. Copyright © Itech Electronic Co., Ltd.
Page 151: Battery Discharging Test Function
5.2.2 Battery Discharging Test Function The IT-M3900B series power system provides the battery discharging test func- tion, which is suitable for discharging tests on all types of portable batteries. The user can set three cut off conditions: cut off voltage, current off capacity and the charging time.
Page 152: Protection Function
Protect menu. Press [Protect] to enter Protect menu interface. The descriptions of protect menu are listed in the table below. Protect Protection function menu Overcurrent protection Turn the OCP function off. Copyright © Itech Electronic Co., Ltd.
Page 153 When the instrument enters the protection state, the buzzer sounds (if Beep menu item is set as default state On), the VFD status indicators Prot and Off are lit, and [On/Off] is turned off. Copyright © Itech Electronic Co., Ltd.
Page 154: Set Over-Current Protection (Ocp)
OCP state. Possible Cause Many reasons can cause OCP, the details are as follows: • The set protection limit Level is lower than the current Meter value. Copyright © Itech Electronic Co., Ltd.
Page 155: Set Over-Power Protection (Opp)
1. Press the composite keys [Protect] on the front panel to enter the protection menu. (1U Model) 2. Press the composite keys [Shift]+[R-set] (Protect) on the front panel to en- ter the protection menu. (2U Model) Copyright © Itech Electronic Co., Ltd.
Page 156: Set Under-Voltage Protection (Uvp)
4. Press the left/right key or rotate the knob to select On and press [Enter] to enter the setting interface. 5. Set the warm-up time Warm-up, protection limit Level and delay time Delay in sequence, and then press [Enter] to confirm. Copyright © Itech Electronic Co., Ltd.
Page 157: Over-Temperature Protection (Otp)
When you return power to the instrument, verify that the cooling fan is running. If not, please contact ITECH Technical Support. Leaving the instrument powered on with an inoperative cooling fan may result in damage to the instrument.
Page 158 When Sense is reversed or short-circuited, the voltage meter value is dis- played as a positive/negative value close to 0, and abnormal high voltage output does not occur, which can avoid damage to the DUT. Copyright © Itech Electronic Co., Ltd.
Page 159: Basic Operation
All panel keys, except the [On/Off] and [Shift]+[3] (Local) keys, are locked. – You can press [Shift]+[3] (Local) to switch the remote control to local control. The mode modification will not affect the output parameters of the power system. Copyright © Itech Electronic Co., Ltd.
Page 160: Key Lock Function
Voltage/Current rise time: V-Rise Time/I-Rise Time Voltage/Current fall time: V-Fall Time/I-Fall Time On/Off switch delay: On Delay/Off Delay Internal resistance of the power supply: Output Res Protect menu OCP/OVP/OPP/UCP/UVP switch status: On/Off (Source mode) OCP/OVP/OPP/UCP/UVP limit setting: Level Copyright © Itech Electronic Co., Ltd.
Page 161: Save Operation
1. Press the composite keys [Shift]+[R-set](Save) to enter the parameter save interface. (1U Model) 2. Press the composite keys [Shift]+[+/-] (Save) to enter the parameter save interface. (2U Model) 3. Set the storage location. Copyright © Itech Electronic Co., Ltd.
Page 162: Recall Operation
Records current and voltage data during the data acquisition period. Configure the Function Menu 1. Press the composite button [Shift]+[1] (Log) on the front panel to enter the configuration menu of the data logging function. The parameters are described as follows: Copyright © Itech Electronic Co., Ltd.
Page 163 2. Set the value of Sample Period and press [Enter]. 3. Set the value of Duration and press [Enter]. 4. Set the value of Source and press [Enter]. 5. Set the value of Data Type and press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 164 When the DC terminals detect that the voltage reaches the trigger voltage setting value and is within the range of the upper and lower trigger limits, a data recording operation is triggered. – Level: Trigger threshold. – Up-Level: Trigger upper limit value. Copyright © Itech Electronic Co., Ltd.
Page 165: Set The Beeper Status (Beep)
The first displayed menu item Beep is used to set the beeper status. 2. Press [Enter] key to enter the parameter setting interface. 3. Press the Left / Right key or turn the knob to adjust the value of this parameter. Copyright © Itech Electronic Co., Ltd.
Page 166: Set The Power-On State (Poweron)
• Reset: Default value, indicates when the instrument is powered on, the instrument will initialize some parameter settings or state. The affected parameters and the reset information are as shown in the following table. Copyright © Itech Electronic Co., Ltd.
Page 167 On Delay/Off Delay Table 6–2 Initial value of the parameter Parameter Initial Value Category Main inter- Voltage setting under CV Rated voltage of the face(Load mode: Vs instrument mode) Current setting under CC mode: Is Copyright © Itech Electronic Co., Ltd.
Page 168 Ps Resistance setting under AU- Rated maximum resist- TO mode: Rs ance value of the instrument On/Off state Config Operation mode menu(Load I-Rise Slope 0.1A/ms mode) I-Fall Slope 0.1A/ms Von mode Latch Von level Copyright © Itech Electronic Co., Ltd.
Page 169: Sense Function (Sense)
4. After the parameter settings are complete, press [Enter]. 6.8 Select Trigger Source (Trig Source) For this series power system, the List and data logging functions can be trig- gered for running by the following methods: Copyright © Itech Electronic Co., Ltd.
Page 170 2. Turn the knob to select the ListTrig Source and press [Enter]. • When setting the trigger source for data logging, select the DLogTrig Source menu item. • The List trigger source set here is also valid for triggering other functions in the Function menu. Copyright © Itech Electronic Co., Ltd.
Page 171: Set The Communication Information (I/O Con)
36 kW. The following figure shows three units connected in parallel, The System Bus is used as connection between master and slaves. (Load mode) Parallel instruments can actively average current. Copyright © Itech Electronic Co., Ltd.
Page 172 • Before connecting 3 single instruments to the AC distribution box, ensure that the distribution box capacity is sufficient. Refer to the corresponding specifications for the AC input parameters of a sin- gle instrument. Copyright © Itech Electronic Co., Ltd.
Page 173 5. After the parallel menu of the three units are set, restart the instrument separately. After the instrument is restarted, the VFD shows that the instrument is work- ing in parallel mode. Revert to Single Mode 1. Set each of the three instruments to single mode. Copyright © Itech Electronic Co., Ltd.
Page 174: Digital I/O Function (Digital Port)
Pulse signal tion state. Input/Output Ps, protection state indicator. Level signal Input/Output Off-Status, OnOff-status Level signal indicator. Input/Output Trig(in), trig signal. Pulse signal Input/Output INH-Living, Turn off the output Pulse signal under emergency status. Copyright © Itech Electronic Co., Ltd.
Page 175 Level fall slope Width 30us • Input/Output Function The IO-1 ~ IO-7 pins are featured default function, the user can setting the function of pin according to requirement. The Input and Output are the Copyright © Itech Electronic Co., Ltd.
Page 176: Io-1. Ps-Clear, Not-Invert
For example, the IO-5 pin is inhibit output by default and the high level is valid, when select revert Invert, the low level is valid and the in- strument output is disabled. 6.11.1 IO–1. Ps-Clear, Not-Invert IO-1 pin can be set to 【Ps-Clear】, 【Input】, 【Output】. Copyright © Itech Electronic Co., Ltd.
Page 177 When pin 1 is set to default Ps-Clear function, pin 1 has bi-directional I/O func- tion, which can receive pulse signal input from the external instrument and also can output pulse signal to external instrument. Pulse signal parameter require- ments are as follows: Copyright © Itech Electronic Co., Ltd.
Page 178 [On/Off] is from Off to On, pin 1 will send a pulse signal to the external instrument. 1. After confirming that the instrument’s OVP protection is cleared, man- ually turn on [On/Off]. 2. Check the oscilloscope and confirm whether pin 1 has pulse output. Copyright © Itech Electronic Co., Ltd.
Page 179: Io-2. Ps, Not-Invert
Duty cycle How to Use When pin 2 is set to default Ps function, pin 2 will output high or low level based on whether the instrument is under protection or not. Under normal conditions Copyright © Itech Electronic Co., Ltd.
Page 180: Io-3. Off-Status, Not-Invert
IO-3 pin can be set to 【Off-Status】, 【Input】, 【Output】. Parameter Description IO–3. Off-Sta- Parameter setting for pin 3. tus, Not-Invert Not- Indicates whether to invert the input/output pulse Invert or level signal. • Invert: Yes Invert • Not-Invert: No Copyright © Itech Electronic Co., Ltd.
Page 181 [On/Off] is turned off, and pin 3 outputs high level; the[On/Off] is turned on, and pin 3 outputs low level. When pin 3 is set to Invert, the output level is completely opposite. 1. Refer to the figure below to connect pin 3 to the external oscilloscope. Copyright © Itech Electronic Co., Ltd.
Page 182: Io-4.Trig(In), Not-Invert
This default function means that pin 4 of the P-IO performs bi-direction control over the instrument’s trigger function. Trig–Out Indicates that when the instru- ment generates a signal (which triggers the Meter function, Da- ta Recording function and List Copyright © Itech Electronic Co., Ltd.
Page 183 Invert, the output is high level. False By default (Not-Invert), the out- put digital signal is 0 (i.e. high level), and in the case of Invert, the output is low level. Copyright © Itech Electronic Co., Ltd.
Page 184 ListTrig Source is set to Manual. 5. Check the oscilloscope and confirm whether pin 4 has following pulse signal output. Level rise slope 10us Level fall slope Minimum time width 30us for low level keep Copyright © Itech Electronic Co., Ltd.
Page 185: Io-5. Inh-Living, Not-Invert
6. Observe the VFD screen on the instrument’s front panel to confirm whether the List file is running or not. 6.11.5 IO–5. INH-Living, Not-Invert IO-5 pin can be set to 【Inhibit】, 【Input】, 【Output】. Copyright © Itech Electronic Co., Ltd.
Page 186 By default (Not-Invert), the out- put digital signal is 0 (i.e. high level), and in the case of Invert, the output is low level. Digital signal of PWM. PWM Freq Frequency PWM Duty Duty cycle Copyright © Itech Electronic Co., Ltd.
Page 187 At this point, [On/Off] button light is lighted on, and VFD indicator light on the front panel displays On, and voltage/current Meter value gradually re- covers to 10V, and the output function is re-initiated. Copyright © Itech Electronic Co., Ltd.
Page 188 Off, and the output function is switched off. In addition, the VFD screen on the front panel displays Inhibit-Ps. When the protection state is cleared, manually turn on [On/Off] again. Copyright © Itech Electronic Co., Ltd.
Page 189: Io-6. Sync-On, Not-Invert
PWM Duty Duty cycle How to Use When pin 6 is set to default Sync-On function, pin 6 has bi-directional I/O func- tion, which can receive pulse signal input from the external instrument and also Copyright © Itech Electronic Co., Ltd.
Page 190 4. Set the voltage to 10V on the front panel of instrument A, and turn on [On/Off]. At this time, check the oscilloscope. The instrument A’s pin 6 outputs pulse signal and the instrument B’s output function is synchronously turned on. Copyright © Itech Electronic Co., Ltd.
Page 191: Io-7. Sync-Off, Not-Invert
When pin 7 is set to default Sync-Off function, pin 7 has bi-directional I/O func- tion, which can receive pulse signal input from the external instrument and also can output pulse signal to external instrument. The parameter requirements of this pulse signal are as follows: Copyright © Itech Electronic Co., Ltd.
Page 192 4. Press [On/Off] on the front panel of instrument A to turn off the output function. At this time, check the oscilloscope. The instrument A’s pin 7 outputs pulse signal and the instrument B’s output function is synchronously turned off. Copyright © Itech Electronic Co., Ltd.
Page 193: Source Analogue Function (Ext-Program) (Optional)
RS-232 communication interface, please refer to 2.5.5 RS–232 Interface (Optional) for detailed description about the interface. Analog Card Interface Introduction The analog function interface is located on the optional IT-E177. The pins de- scription is as below. Copyright © Itech Electronic Co., Ltd.
Page 194 Vl. Analog quantity menu description When the analog quantity function is optionally equipped, the system menu dis- plays the analog quantity menu. The analog quantity menu items and parame- ters are described below: Copyright © Itech Electronic Co., Ltd.
Page 195 Taking the Ch1 programming channel as an example, the user needs to convert the values of Mx and Mb according to the following formulas, and then set the two values through the front panel keys or SCPI remote commands. Copyright © Itech Electronic Co., Ltd.
Page 196 CV priority • CC priority How to Use The following takes the CV priority mode as an example to introduce the usage steps. 1. Refer to the figure below to complete the pin connection. Copyright © Itech Electronic Co., Ltd.
Page 197 Press the composite keys [Shift]+[P-set] (System) on the front panel to enter the system menu. b. Use knob key to select Ext-Program and press [Enter]. c. Set the Ext-Program→On / Off to On to turn on the analog function. Copyright © Itech Electronic Co., Ltd.
Page 198: Loadanalogue Function (Ext-Program) (Optional)
Remote control of setting values in different modes. • Remove switching of CC/CV/CR/CW modes. • Remote monitoring of input voltage/current measurement. • RS-232 communication interface, please refer to2.5.5 RS–232 Interface (Optional) for detailed description about the interface. Copyright © Itech Electronic Co., Ltd.
Page 199 Ground Ground terminal. V_Monitor Analog out Voltage monitor signal. This pin gen- erates a voltage of 0 V to 10 V to monitor an input voltage of 0 V to the maximum rated value. Copyright © Itech Electronic Co., Ltd.
Page 200 Input2 description. Analog quantity menu description When the analog quantity function is optionally equipped, the system menu dis- plays the analog quantity menu. The analog quantity menu items and parame- ters are described below: Copyright © Itech Electronic Co., Ltd.
Page 201 (slope coefficient) and b (offset) values in different modes in the analog quantity menu. For calculation of the analog quantity value. The user can calculate the M and b values based on the analog requirements in accordance with the for- mula below. Copyright © Itech Electronic Co., Ltd.
Page 202 The voltage control in CV mode is taken as an example below to describe the connection and usage. 1. Refer to the figure below to complete the pin connection. Copyright © Itech Electronic Co., Ltd.
Page 203 4. The connection method is as shown below. The voltage reading from -10 to 10V corresponds to the zero to full-scale voltage/current setting of the instrument. The connection diagram is as shown below. Copyright © Itech Electronic Co., Ltd.
Page 204: View The System Information (System Info)
Voltage Min Display the minimum voltage value. Current Max Display the maximum current value. Current Min Display the minimum current value. Power Max Display the maximum power value. Power Min Display the minimum power value. Copyright © Itech Electronic Co., Ltd.
Page 205: Restored To Factory Setting (System Reset)
Upper limit of voltage: Vh, and Upper limit value: lower limit of voltage: Vl 0.002V Lower limit value: 0 Upper limit of current: I+, and One percent of the rated lower limit of current: I- current of the instrument Copyright © Itech Electronic Co., Ltd.
Page 206 30000 LAN→Serv-Conf MDNS/PING/Telnet- scpi/Web/VX-11/ Raw-socket: On • VCP: 9600,8,N,1 • (Optional) RS232: 9600,8,N,1 • (Optional) External analog: Off • (Optional) GPIB: Ad- dress=1 • Digital Port IO–1: Ps-Clear • IO–2: Ps • IO–3: Off-Status Copyright © Itech Electronic Co., Ltd.
Page 207 Level OVP/OCP/OPP/UCP/UVP Delay time: Delay UCP/UVP Warm time: Warm-up Table 6–4 Initial value of the parameter Parameter Initial Value Category Main inter- Voltage setting under CV mode: Rated voltage of the face(Load instrument mode) Copyright © Itech Electronic Co., Ltd.
Page 208 Is Power setting under AUTO mode: Ps Resistance setting under AUTO Rated maximum resist- mode: Rs ance value of the instrument On/Off state System Beep menu(Load PowerOn Reset mode) Sense ListTrig Source Manual Copyright © Itech Electronic Co., Ltd.
Page 209 Von level On Delay/Off Delay Protect OCP/OPP/UVP Status switch menu(Load OCP/OPP Protection point: Rated current and mode) Level power value of the instrument UVP Protection point: Level OCP/OPP/UVP Delay time: Delay UVP Warm time: Warm-up Copyright © Itech Electronic Co., Ltd.
Page 210: Observe Power Grid Information (Ac-Meter)
3. Press the Left / Right key or turn the knob to adjust the value of this parameter. • On: indicates the display is on. • Off: indicates the beeper is off. 4. After the parameter settings are complete, press [Enter]. Copyright © Itech Electronic Co., Ltd.
Page 211: System Upgrade
For example, when there are multiple system upgrading package post- fixed with .itech in the root directory of your USB flash drive, you need to use a text editing tool to open the configuration file and specify the up- grade package name corresponding to the present upgrade operation.
Page 212 Basic Operation 3. If the upgrade fails, the interface will prompt Update fail. At this point, you cannot use the instrument. Please contact ITECH technical staff for treatment. Upgrade Operation • System Upgrade under Single-unit Mode 1. Insert the USB flash drive into the USB interface on the front panel of the instrument.
Page 213 The system will automatically perform upgrading. If No is selected, it means to exit upgrading, and the system will di- rectly enter into the main interface. 5. After the upgrading is completed, you need to restart the instrument manually. Copyright © Itech Electronic Co., Ltd.
Page 214: Technical Specification
Besides, we will introduce the working environment and storage temperature. ♦ Main Specification ♦ IT-M3901B-10-170 ♦ IT-M3903B-10-340 ♦ IT-M3905B-10-510 ♦ IT-M3910B-10-1020 ♦ IT-M3906B-80-120 ♦ IT-M3912B-80-240 ♦ IT-M3906B-300-60 ♦ Supplemental Characteristics 7.1 Main Specification Copyright © Itech Electronic Co., Ltd.
Page 215: M3901B-10-170
≤0.03% + 0.03%FS Read Back Current ≤0.1% + 0.1%FS Accuracy Power ≤0.5% + 0.5%FS Vp-p ≤65mVpp Voltage ripple Vrms ≤10mV Voltage ≤50ppm/℃ Setup Temperature Coefficient ≤50ppm/℃ Current Read Back Temper- Voltage ≤50ppm/℃ ature Coefficient Copyright © Itech Electronic Co., Ltd.
Page 216 0 to 10V Voltage 0 to 10V corresponds to external monitor- voltage monitor ing voltage 0 to 10V Load Mode Voltage 0～10V Current 3A～120A Power 12W～1200W Rated value Resistance 0.009Ω～3Ω Min. operating 0.6V at 120A voltage Copyright © Itech Electronic Co., Ltd.
Page 217 ≤0.05% + 0.05%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.002%*I + 0.05%FS Load Regulation Current ≤0.05% + 0.05%FS Short-circuit test Current 122A 125A Output protection Overpower 1224W protection Remote Sense Compensation ≤2V Voltage Copyright © Itech Electronic Co., Ltd.
Page 218 Current harmonics ≤3% Standard: USB/LAN/CAN/IO Standard Interface Optional: GPIB/Analog/RS232 Command Re- 0.1ms sponse Time Parallel Number ≤16 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature IP20 Isolation DC to GND 300Vdc Isolation AC to GND 3500Vdc Cooling Copyright © Itech Electronic Co., Ltd.
Page 219: M3903B-10-340
≤0.5% + 0.5%FS Setup Accuracy Resistance in series （CV ≤1%FS priority） Load resistance （CC Lower limit: 1/(1/Rset+(1/Rset)*0.2+0.008) priority） Upper limit: 1/(1/Rset-(1/Rset)*0.2-0.008) Voltage ≤0.03% + 0.03%FS Read Back Accuracy Current ≤0.1% + 0.1%FS Power ≤0.5% + 0.5%FS Copyright © Itech Electronic Co., Ltd.
Page 220 （optional） External programming voltage 0 to 10V voltage program Corresponding voltage 0 to 10V Voltage 0 to 10V corresponds to external voltage monitor monitoring voltage 0 to 10V Load Mode Voltage Rated value 0～10V Copyright © Itech Electronic Co., Ltd.
Page 221 Time Dynamic Frequency 100Hz Voltage ≤0.05% + 0.05%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.002%*I + 0.05%FS Load Regulation Current ≤0.05% + 0.05%FS Short-circuit test Current 245A 250A Output protection Overpower protection 2448W Copyright © Itech Electronic Co., Ltd.
Page 222 Standard Interface Command Response Time 0.1ms Parallel Number ≤16 Working Temperature 0～40℃ Storage Temperature -10℃～70℃ IP20 Isolation DC to GND 300Vdc Isolation AC to GND 3500Vdc Cooling Dimension ( mm) 660mm*437mm*43.5mm Weight( net) 12.5kg Copyright © Itech Electronic Co., Ltd.
Page 223: M3905B-10-510
Load resistance （CC Lower limit: 1/(1/Rset+(1/Rset)*0.1+0.008) priority） Upper limit: 1/(1/Rset-(1/Rset)*0.1-0.008) Voltage ≤0.03% + 0.03%FS Read Back Current ≤0.1% + 0.1%FS Accuracy Power ≤0.5% + 0.5%FS Vp-p ≤65mVpp Voltage ripple Vrms ≤10mV Setup Temperature Voltage ≤50ppm/℃ Coefficient Copyright © Itech Electronic Co., Ltd.
Page 224 External programming voltage 0 to 10V voltage program Corresponding voltage 0 to 10V Voltage 0 to 10V corresponds to external voltage monitor monitoring voltage 0 to 10V Load Mode Voltage 0～10V Current 6～360A Rated value Power 60～3600W Resistance 0.003Ω～1Ω Copyright © Itech Electronic Co., Ltd.
Page 225 ≤0.05% + 0.05%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.002%*I + 0.05%FS Load Regulation Current ≤0.05% + 0.05%FS Short-circuit test Current 366A 375A Output protection Overpower protection 3672W Remote Sense Compensation ≤2V Voltage Copyright © Itech Electronic Co., Ltd.
Page 226 Standard Interface Command Re- 0.1ms sponse Time Parallel Number ≤16 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature IP20 Isolation DC to GND 300Vdc Isolation AC to GND 3500Vdc Cooling Dimension ( mm) 660mm*437mm*43.5mm Weight( net) 15kg Copyright © Itech Electronic Co., Ltd.
Page 227: M3910B-10-1020
Lower limit: 1/(1/Rset+(1/Rset)*0.1+0.008) Upper （CC priority） limit: 1/(1/Rset-(1/Rset)*0.1-0.008) Voltage ≤0.03% + 0.03%FS Read Back Current ≤0.1% + 0.1%FS Accuracy Power ≤0.5% + 0.5%FS Vp-p ≤65mVpp Voltage ripple Vrms ≤10mV Setup Temperature Voltage ≤50ppm/℃ Coefficient Copyright © Itech Electronic Co., Ltd.
Page 228 0 to 10V Voltage 0 to 10V corresponds to external monitor- voltage monitor ing voltage 0 to 10V Load Mode Voltage 0～10V Current 12A～720A Rated value Power 120W～7200W Resistance 0.0015Ω～0.5Ω Copyright © Itech Electronic Co., Ltd.
Page 229 Time Dynamic Frequency 100Hz Voltage ≤0.05% + 0.05%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.002%*I + 0.05%FS Load Regulation Current ≤0.05% + 0.05%FS Short-circuit test Current 732A 750A Output protection Overpower 7344W protection Copyright © Itech Electronic Co., Ltd.
Page 230 Current harmonics ≤3% Standard: USB/LAN/CAN/IO Standard Interface Optional: GPIB/Analog/RS232 Command Re- 0.1ms sponse Time Parallel Number ≤8 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature IP20 Isolation DC to GND 300Vdc Isolation AC to GND 3500Vdc Copyright © Itech Electronic Co., Ltd.
Page 231: M3906B-80-120
≤0.5% + 0.5%FS Setup Accuracy Resistance in series ≤1%FS （CV priority） Load resistance Lower limit: 1/(1/Rset+(1/Rset)*0.05+0.0005) （CC priority） Upper limit: 1/(1/Rset-(1/Rset)*0.05-0.0005) Voltage ≤0.03% + 0.03%FS Read Back Current ≤0.1% + 0.1%FS Accuracy Power ≤0.5% + 0.5%FS Copyright © Itech Electronic Co., Ltd.
Page 232 External analog （optional） External programming voltage 0 to 80V Corre- voltage program sponding voltage 0 to 10V Voltage 0 to 80V corresponds to external monitor- voltage monitor ing voltage 0 to 10V Load Mode Copyright © Itech Electronic Co., Ltd.
Page 233 120A/ms Transient Response Falling slope 120A/ms Time Dynamic Frequency 500Hz Voltage ≤0.01% + 0.01%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.01% + 0.01%FS Load Regulation Current ≤0.05% + 0.05%FS Short-circuit test Current 122.4A Copyright © Itech Electronic Co., Ltd.
Page 234 Max. input current 12.5Aac Max. efficiency Power Factor 0.99 DC component ≤0.2A Current harmonics ≤3% Standard: USB/LAN/CAN/IO Optional: GPIB/Analog/RS232 Standard Interface Command Re- 0.1ms sponse Time Parallel Number ≤16 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature IP20 Copyright © Itech Electronic Co., Ltd.
Page 235: M3912B-80-240
Current 0.01A Resolution Power Voltage ≤0.03% + 0.03%FS Current ≤0.1% + 0.1%FS Power ≤0.5% + 0.5%FS Setup Accuracy Resistance in series ≤1%FS （CV priority） Load resistance Lower limit: 1/(1/Rset+(1/Rset)*0.05+0.0005) （CC priority） Upper limit: 1/(1/Rset-(1/Rset)*0.05-0.0005) Copyright © Itech Electronic Co., Ltd.
Page 236 -10V to 10V External analog （optional） External programming voltage 0 to 80V Corre- voltage program sponding voltage 0 to 10V Voltage 0 to 80V corresponds to external monitor- voltage monitor ing voltage 0 to 10V Copyright © Itech Electronic Co., Ltd.
Page 237 ≤50ppm/℃ Current Rising slope 240A/ms Transient Response Falling slope 240A/ms Time Dynamic Frequency 500Hz Voltage ≤0.01% + 0.01%FS Line Regulation Current ≤0.05% + 0.05%FS Voltage ≤0.01% + 0.01%FS Load Regulation Current ≤0.05% + 0.05%FS Copyright © Itech Electronic Co., Ltd.
Page 238 Max. input current 25Aac Max. efficiency Power Factor 0.99 DC component ≤0.2A Current harmonics ≤3% Standard: USB/LAN/CAN/IO Optional: GPIB/Analog/RS232 Standard Interface Command Re- 0.1ms sponse Time Parallel Number ≤16 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature Copyright © Itech Electronic Co., Ltd.
Page 239: M3906B-300-60
0.001A Resolution Power Voltage ≤0.03% + 0.03%FS Current ≤0.1% + 0.1%FS Power ≤0.5% + 0.5%FS Setup Accuracy Resistance in ser- ≤1%FS ies （CV priority） Load resistance Lower limit: 1/(1/Rset+(1/Rset)*0.05+0.0001) （CC priority） Upper limit: 1/(1/Rset-(1/Rset)*0.05-0.0001) Copyright © Itech Electronic Co., Ltd.
Page 240 -10V to 10V External analog （optional） External programming voltage 0 to 300V Corre- voltage program sponding voltage 0 to 10V Voltage 0 to 300V corresponds to external moni- voltage monitor toring voltage 0 to 10V Copyright © Itech Electronic Co., Ltd.
Page 241 Read Back Temper- ature Coefficient ≤50ppm/℃ Current Rising slope 60A/ms Falling slope Transient Response 60A/ms Time Dynamic 500Hz Frequency Voltage ≤0.01% + 0.01%FS Line Regulation Current ≤0.05% + 0.05%FS Load Regulation Voltage ≤0.01% + 0.01%FS Copyright © Itech Electronic Co., Ltd.
Page 242 Max. input current 12.5Aac Max. efficiency 94.5% Power Factor 0.99 DC component ≤0.2A Current harmonics ≤3% Standard: USB/LAN/CAN/IO Optional: GPIB/Analog/RS232 Standard Interface Command Re- 0.1ms sponse Time Parallel Number ≤16 Working 0～40℃ Temperature Storage -10℃～70℃ Temperature Copyright © Itech Electronic Co., Ltd.
Page 243 Isolation DC to GND 600Vdc Isolation AC to GND 3500Vdc Cooling Dimension ( mm) 660mm*437mm*43.5mm Weight( net) 15kg * At low voltage input, the set power will decrease. For more information, please contact ITECH. Copyright © Itech Electronic Co., Ltd.
Page 244: Supplemental Characteristics
Technical Specification 7.8 Supplemental Characteristics State storage capacity: 10 sets Recommended calibration frequency: once a year Cooling style: fans Copyright © Itech Electronic Co., Ltd.
Page 245: Routine Maintenance
During self-test, errors may be induced by signals present on ex- ternal wiring, such as long test leads that can act as antennae. 8.2 Cleaning and Maintenance To ensure the safety function and performance of the instrument, please clean and maintain the instrument properly. Copyright © Itech Electronic Co., Ltd.
Page 246: Contact Of Itech Engineers
If there are still some problems, carefully read the Warranty and Limitation of Warranty in the preface of the manual. Confirm that your instrument complies with warranty service conditions. If after your warranty expires, ITECH offers re- pair services at competitive prices.
Page 247: Return For Repair
4006-025-000 for technical support and services. 8.4 Return for Repair If your instrument fails during the warranty period, ITECH will repair or replace it under the terms of your warranty. After your warranty expires, ITECH offers re- pair services at competitive prices. Also you can purchase an extended mainte- nance service contract that exceeds the standard warranty period.
Page 248 ITECH recommends that you retain the original shipping carton for return ship- ments and always insure shipments. To ship the unit to ITECH for service or repair: 1. Download the ITECH maintenance service application from our website, complete it and place it in the box with the instrument.
Page 249: A Appendix
♦ Fuse Replacement A.1 Specifications of Red and Black Test Cables ITECH provides you with optional red and black test cables, which are sold indi- vidually and you can select for test. For specifications of ITECH test cables and maximum current values, refer to the table below.
Page 250: Fuse Replacement
The way to replace the fuse changes accordingly. The common ways are as follows. Please choose the corresponding way of disassembly and replace- ment based on the fuse assembly of the actual instrument. Copyright © Itech Electronic Co., Ltd.
Page 251 Appendix If there are no fuse assembly on the instrument rear panel, it means that you can’t replace the fuse by yourself. Please contact the ITECH engineer on the condition of the same malfunction. Copyright © Itech Electronic Co., Ltd.
Page 252 2. Have a visual inspection of the fuse to see whether it is burnt out; if yes, replace it with another fuse of the same specification. Re- fer to the corresponding technical specifi- cations for fuse rating. Copyright © Itech Electronic Co., Ltd.
Page 253 3. Please replace with a fuse of the same specification. Refer to the technical specifi- cation of the corresponding instrument. 4. When install, put into the fuse box firstly. Then Push and turn the fuse box to 90 de- grees clockwise. Copyright © Itech Electronic Co., Ltd.
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