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Array electronic 3751A Manual

375 series electronic load
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USER'S MANUAL
375X SERIES ELECTRONIC LOAD

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Summary of Contents for Array electronic 3751A

  • Page 1 Contents USER’S MANUAL 375X SERIES ELECTRONIC LOAD...

  • Page 2: Table Of Contents

    Contents Contents Safety Instruction …………………………………...…….............1 Chapter I General Introduction ……………………………………………………...……..3 1.1 Function Features …………………………………………………………..……………3 1.2 Front Panel ……………………………………………………………………..……...4 1.3 Rear Panel ……………………………………………………………….……………..5 1.4 Keypad Function ………………………………………………………………..……….5 1.5 Annunciators ……………………………………………………………………..……...7 1.6 Display ………………………………………………………………….……………….8 1.6.1 Main Menu List ………………………………………………………………………8 1.6.2 Port Configuration Menu ………………….…………………………………………9 1.6.3 Transient Operation Menu ……………………………………………….…………10 1.6.4 List Operation Menu ………………………………………………….…………….11 1.6.5 Basic Mode Menu &...
  • Page 3 Contents 2.3.3.4 Transient Resistance Level …………………………………..……..…………..28 2.3.4 CP Test …………………………………………...………………………………..28 2.3.4.1 Power Setting Range …………………………...………………………………29 2.3.4.2 Immediate Power Level ………………………………………………………...29 2.3.4.3 Triggered Power Level ……………………………………………...………….29 2.3.5 CC+CP Test ………………………………………………………………………..30 2.3.6 CR+CV Test …………………………………………………………………..….30 2.3.7 CP+CV Test ………………………………………………….…………………….31 2.4 Transient Operation ……………………………………………………………...……31 2.4.1 Continuous Transient Operation ……..…………………………………………….32 2.4.2 Pulsed Transient Operation ……………………………………………..…………34 2.4.3 Toggled Transient Operation ……...……………………………………………….36...
  • Page 4 Contents 4.4 ON/OFF of Eload Input ……………………………….……………………..……...61 4.5 Basic Operation ……………………….…………………………………………..…61 4.5.1 CC Mode ……………………………………………………………………………62 4.5.2 CV Mode ……………………………………………………………………………64 4.5.3 CR Mode ……………………………………………………………………………66 4.5.4 CP Mode ……………………………………………………………………………68 4.6 +CV Mode ……………..………………………………………………………………70 4.6.1 CC+CV Mode ………………..……………………………………………………..70 4.6.2 CR+CV Mode …………………..…………………………………………………..71 4.6.3 CP+CV Mode ………………..……………………………………………………..72 4.7 Transient Operation ……………………………………………………………………73 4.7.1 Continuous Transient Operation ……………………………………………………73 4.7.2 Pulsed Transient Operation …………………………………………………………75...
  • Page 5 Contents 5.5.3 Programmable Current Protection …………………………...…………….………..99 5.6 CC Mode Example …………………………………………………………….………..99 5.7 CV Mode Example ………………………………………………………..…………...100 5.8 CR Mode Example ……………………………………………………………..……...100 5.9 Continuous Transient Operation Example ……………………………………….……100 5.10 Pulsed Transient Operation Example …………………………………………….…..101 Specifications ………………………………………………………………………………102 Frame Diagram ………………………………………………………………...………….110 Declarations … ……………………………………………………………..……………113...

  • Page 6: Safety Instruction

    8. Power Supply AC Input Voltage: 100~120VAC/200~240VAC (90~132VAC/180~250VAC) ● Frequency: 47~63Hz ● Power: 3751A 80VA Max ● Connect the protective grounding conductor of the AC power cord to an earth ground, to ● avoid electrical shock. 9. Cleaning Disconnect the power before cleaning.
  • Page 7 Chapter I General Introduction ARRAY material such as benzene, toluene, xylene and acetone. 10. Operation Environment Location: Indoor, no direct sunlight, dust free, almost non-conductive pollution ● Temperature: 0℃~40℃ ● Humidity: 0~90% RH ● (Pollution Degrees) EN6100-1:2010 specifies the pollution degree and their requirements as ●...

  • Page 8: Chapter I General Introduction

    General Introduction of 375XA Eload ARRAY 375XA electronic load is a new-generation high-performance programmable electronic load researched by ARRAY ELECTRONIC CO., LTD, which provides powerful test function and friendly human-machine interface. The electronic load is equipped with RS232, USB and GPIB...

  • Page 9: Front Panel

    Chapter I General Introduction ARRAY  The high-efficiency intelligent cooling system can ensure the equipment has a long-term, full-power, trouble-free and continuous work;  Automatic ON/OFF function effectively simply the test operation;  The combined use of knob and number keypad makes the operation more convenient; ...

  • Page 10: Rear Panel

    Chapter I General Introduction ARRAY 1.3 Rear Panel The connecting terminals on the rear panel of 375XA series Eload include: the input terminals (INPUT+ and INPUT-) and voltage test terminals (SENSE+SENSE-), as shown in follows 1. RS232 interface 2. GPIB interface (optional) 3.
  • Page 11 Chapter I General Introduction ARRAY Table 1-1 Key Explanation: Number 0 Number 1 Number 2 Number 3 Number 4 Number 5 Number 6 Number 7 Number 8 Number 9 Clear Epitope shift key Save key Recall key Input ON/OFF key Confirmation key...

  • Page 12: Annunciators

    Chapter I General Introduction ARRAY Left key Right key Upper key Down key Delete key Local key Error code display key I/O port configuration key CC mode selection key CV mode selection key CR mode selection key CP mode selection key Alternative function shift key 1.5 Annunciators Table 1-3, Annunciator Explanations:...

  • Page 13: Display

    Chapter I General Introduction ARRAY 1.6 Display 1. Date and Time To display the current date and time 2. System State To display the current system state 3. Test Value To display the current voltage, current and power value 4. Operation State To display the current operation mode and the input state 5.

  • Page 14: Port Configuration Menu

    Chapter I General Introduction ARRAY The contents of the main menu are as the follows: Beeper To control the buzzer work or not; Encoder To control the encoder work or not; Trigger To control the trigger work or not; Calibration To calibrate the accuracy of the Eload, for details please see Calibration Methods Information...

  • Page 15: Transient Operation Menu

    Chapter I General Introduction ARRAY Port Configuration Com Port USB GPIB Baud Rate 2400 9600 19200 38400 57600 115200 Parity Bit Non Parity/ Even Parity/ Odd Parity RS232 Interface Data Bit 8 Bit 9 Bit Stop Bit 1 Bit 2 Bit USB Interface GPIB Interface GPIB Address...

  • Page 16: List Operation Menu

    Chapter I General Introduction ARRAY Function Explanation Parameter Example L Level Transient Low Level 1.000A H Level Transient High Level 6.000A LowTime Time for transient low level 0.6s HighTime Time for transient high level 0.6s RiseTime Time for transient rising edge 0.01s FallTime Time for transient falling edge...
  • Page 17 Chapter I General Introduction ARRAY Number List Steps（0-19） Name List Name（5 characters） Total Steps Total steps of list operation Execution Times Loop Times（1-999） Link Link（0-19，off） Press this dynamic key to return to the main menu; Press this key to switch between CCL and CCH; Press this key to enter the transient operation;...

  • Page 18: Basic Mode Menu & Lcd Information

    Chapter I General Introduction ARRAY 1.6.5 Basic Mode Menu & LCD Information 1.6.5.1 CC Mode Menu Description: In Constant Current Mode, the load units will sink the amount of current programmed. Regardless of the voltage, the current will stay the same. For more details on CC Mode, please refer to Page 52.

  • Page 19: Cr Mode Menu

    Chapter I General Introduction ARRAY Input State ON/OFF; Run Time To display the time the load being ON, reset when shutdown or switch mode; Para Set To set the constant current value, unit: A; Volt Start To set the start voltage of the load, 0 indicates the function being not enabled; Current Limit To limit the maximum Current level at the mode Rising Rate...
  • Page 20 Chapter I General Introduction ARRAY Mode CRH indicates constant resistance high range; CRL indicates constant resistance low range; Input State ON/OFF; Run Time To display the time the load being ON, reset when shutdown or switch mode; To set the constant resistance value, unit:KΩ; Para Set Volt Start To set the start voltage of the load, 0 indicates the function being not...
  • Page 21 Chapter I General Introduction ARRAY To display the current input terminal voltage; Voltage Value To display the current power value; Power Value Current Value To display the current value CVH indicates constant voltage high range; Mode CVL indicates constant voltage low range; ON/OFF;...
  • Page 22 Chapter I General Introduction ARRAY To display the current input terminal voltage; Voltage Value To display the current power value; Power Value Current Value To display the current value CP indicates constant power mode; Mode ON/OFF; Input State To display the time the load being ON, reset when shutdown or Run Time switch mode;...

  • Page 23: Cv Mode Menu

    Chapter I General Introduction ARRAY 1.6.5.5 +CV Mode Menu Description：+CV mode can be added to CC, CR and CP mode. For more details on +CV Mode, please refer to Page 60. Voltage Value To display the current input terminal voltage; Power Value To display the current power value;...

  • Page 24: Application Save Menu

    Chapter I General Introduction ARRAY 1.6.6 Error & Alarm Menu When the load appears Alarm & Protection, the LCD will display the corresponding alarm and protection state. The above diagram is the display of the reverse voltage protection. The load has the following alarm functions: over current (OC), over voltage (OV), over power (OP), over temperature (OT), reverse voltage (RV);...

  • Page 25: Remote Programming

    Chapter I General Introduction ARRAY （0-9）totally 10 Storage Position Press this dynamic key to return to the main menu; Press this dynamic key to delete the data of the selected position. 1.6.7.2 Recall Save Menu （0-9）totally 10 Storage Position Press this dynamic key to return to the main menu; Press this dynamic key to delete the data of the selected position.

  • Page 26: Local & Remote Control

    Chapter II Functions & Features ARRAY Chapter II Functions and Features This chapter will mainly introduce the functions and features of the load. After reading this chapter, you will have a better understanding of ARRAY 375XA Electronic Load. 2.1 Local & Remote Control ARRAY 375XA Electronic Load can be controlled via the keypad and the knob in the front panel, or via the remote controller by the remote interface.

  • Page 27: Basic Test Functions

    Chapter II Functions & Features ARRAY  Constant Resistance + Constant Voltage Mode: CRL+CV, CRH+CV  Constant Power + Constant Voltage Mode: CP+CV  Transient Operation: TRAN  List Operation: LIST 2.3 Basic Test Functions There are four basic test functions: constant current (CC), constant voltage (CV), constant resistance (CR), constant power (CP) and twelve operation mode: CCL, CCH, CVL, CVH, CRL, CRH, CP, CCL+CV, CCH+CV, CRL+CV, CRH+CV, CP+CV.

  • Page 28: Current Setting Range

    Chapter II Functions & Features ARRAY Figure 2-1 Constant Current Mode 2.3.1.1 Current Setting Range The setting ranges for the load are listed as follows: 3750A 3751A 3752A 3753A 3754A 3755A 3756A Model 0～6A 0～6A 0～6A 0～6A 0～8A 0～8A 0～8A Mode 0～100A...

  • Page 29: Transient Current Vevel

    Chapter II Functions & Features ARRAY immediate current level automatically when a trigger is received. In CC mode, if the input of the load is ON, the input current will be updated immediately when a trigger occurs. If it is not in CC mode, the level will not affect the load until the CC mode becomes enabled.

  • Page 30: Voltage Setting Range

    Chapter II Functions & Features ARRAY operation state, select CVL or CVH mode via dynamic key, then enter the voltage value via the keypads or knob combining with keys, finally confirm the setting with key. The CV mode and the parameters can also be set via the remote commands: MODE CVL|CVH VOLTage <NRf+>...

  • Page 31: Triggered Voltage Level

    Chapter II Functions & Features ARRAY 2.3.2.3 Triggered Voltage Level The triggered voltage level is the preset voltage value in the load, which will become the immediate voltage level automatically when a trigger is received. In CV mode, if the input of the load is ON, the input voltage will be updated immediately when a trigger occurs.

  • Page 32: Resistance Setting Range

    Chapter II Functions & Features ARRAY Fig. 2-3 Constant Resistance Mode 2.3.3.1 Resistance Setting Range The setting ranges of the resistance for the load are listed as follows: Model 375XA 0.01Ω～240000Ω Mode 0.2Ω～2400KΩ If the input of the load is ON, the load will be turned off automatically when the mode is changed. For example: When the load is switched from CRL to CRH, the input of the load will be off automatically.

  • Page 33: Transient Resistance Level

    Chapter II Functions & Features ARRAY immediate resistance level automatically when a trigger is received. In CR mode, if the input of the load is ON, the input resistance value will be updated immediately when a trigger occurs. If it is not in CR mode, the level will not affect the load until the CR mode becomes enabled.

  • Page 34: Power Setting Range

    Chapter II Functions & Features ARRAY Fig. 2-4 Constant Power Mode 2.3.4.1 Power Setting Range The setting ranges of the power for the load are listed as follows: 3750A 3751A 3752A 3753A 3754A 3755A 3756A Model 1500W 2000W 1000W 2400W...

  • Page 35: Cr+Cv Test

    Chapter II Functions & Features ARRAY The status register of the load can keep track of pending triggers and other operation conditions, which will be described in details in 《ARRAY 375XA Electronic Load Programming Guide》. 2.3.5 CC+CV Test When CC+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage.

  • Page 36: Cp+Cv Test

    Chapter II Functions & Features ARRAY 2.3.7 CP+CV Test When CP+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no matter how the input voltage changes, the power of the Eload will be always at the setting power.

  • Page 37: Continuous Transient Operation

    Chapter II Functions & Features ARRAY (LevelH), low level time (TimeL), high level time (TimeH), time for rising edge (TimeR), time for falling edge (TimeF) and operation mode. The transient high/low level and the corresponding CC, CV, CR and CP modes share the same setting ranges.
  • Page 38 Chapter II Functions & Features ARRAY TRANsient:MODE CONTinuous For Example: assume that the CCH range is active, the input of the load is OFF, then the transient parameters should be set as follows: Press dynamic key to enter into transient operation; Set the following parameters listed in transient operation menu: LevelL: 5.000A LevelH: 10.000A...

  • Page 39: Pulsed Transient Operation

    Chapter II Functions & Features ARRAY Figure 2-6 Continuous Transient Operation 2.4.2 Pulsed Transient Operation The trigger function is required for pulsed transient operation. When there is no trigger occurs, the load remains at the transient low level. After a trigger has been received, a pulse, which is with three stages: rising edge, transient high level and falling edge, will appear.
  • Page 40 Chapter II Functions & Features ARRAY do the trigger initial operation before the trigger operation, otherwise the load won’t response to the trigger. For example: assume that the CCH range is active, and the input of the load is OFF, then the transient parameters should be set as follows: Press dynamic key to enter into transient operation interface;...

  • Page 41: Toggled Transient Operation

    Chapter II Functions & Features ARRAY Then after 200us duration of falling edge, the current returns to the transient low level (5A). Fig. 2-7 Pulsed Transient Operation 2.4.3 Toggled Transient Operation The trigger function is required for toggled transient operation. When there is no trigger occurs, the load remains at the transient level.
  • Page 42 Chapter II Functions & Features ARRAY transient parameters should be set as follows: Press dynamic key to enter into transient operation interface; Set the following parameters in the transient operation menu: LevelL: 5.000A LevelH: 10.000A TimeR： 0.10ms TimeF: 0.20ms Mode: Togg Then press key to open the input of the load;...

  • Page 43: List Operation

    Chapter II Functions & Features ARRAY Figure 2-8 Toggled Transient Operation 2.5 List Operation Beside the transient operation, the load provides more flexible list operation, which can make the load operate according to the preset sequence. The list operation allows the users to program series of sequence steps and the operation mode, load’s value, the duration time for each step can be set.

  • Page 44: Triggered Operation

    Chapter II Functions & Features ARRAY Figure 2-9 List Operation Notes: In list operation, the Von point and the current limit level should be taken into consideration, which may cause the shut down of the input, thus interrupt the list operation. 2.6 Triggered Operation The triggered operation is mainly used to keep the load synchronized with other test equipments or events.

  • Page 45: Input Control

    Chapter II Functions & Features ARRAY The load has three triggering sources: BUS, EXTernal and HOLD. The BUS mode: GPIB <GET> signal or the *TRG command is the trigger source. ● The EXTernal Mode: Choose the trigger input terminal of the load as the trigger source. The ●...

  • Page 46: Current Limit Function In Cv Mode

    Chapter II Functions & Features ARRAY Von Latch is used to latch the active status of the load. The Volt Start Point being 0V means the Volt Start Latch function being inactive. If the Volt Start Latch function is needed to be enabled, it is only need to adjust the Volt Start voltage to the desired set level.

  • Page 47: Current Rising Rate

    Chapter II Functions & Features ARRAY Fig. 2-13 Current Limit Function in CV Mode 2.7.4 Current Rising Rate Curr Rise Rate is to set the current rising rate in CC, CV and CP modes. It can be set in the main menu or via the remote command: CURRent:SLEWrate:POSitive <NRf+>.
  • Page 48 The 375XA electronic load can save 10 groups of parameters. All parameters relevant to saving and recalling operation are listed in Table 2-1 (Take 3751A as an example.). Table 2-1...
  • Page 49 Chapter II Functions & Features ARRAY Current Rise Rate Current Rising Rate 15A/us Current Fall Rate Current Falling Rate 15A/us Current TLEVel Transient Current Level *Current Protection Level Current Protection Limit 150A *Current Protection Delay Current Protection Delay *Current Protection State Enable/Disable Current Protection Voltage Immediate Voltage Level...

  • Page 50: Status Report

    Chapter II Functions & Features ARRAY 2.10 Read Remote Program Errors The Err annunciator at the upper right corner on the screen will display the error information when the remote programming errors occur. The error codes are shown as follows: ...
  • Page 51 Chapter II Functions & Features ARRAY If the load goes wrong, the input will be shut down with beeps, and the LCD will display the detected conditions and the load will enter into the latched protection status. And the corresponding state bit in the register will be set. Except some specific operations, the load will not respond to other commands.
  • Page 52 Chapter II Functions & Features ARRAY reached, the current protection is triggered, the input will be turned off and the display will show OC. Meantime, the OC and PS status register bits are set and remain until they are reset and the overcurrent condition is removed.
  • Page 53 Chapter II Functions & Features ARRAY 2.12.6 Reverse Polarity In case the input DC voltage lines are connected with wrong polarity, the reverse polarity alarm function will be triggered. The input of the load will be turned off with RV display. Meantime, the RV and VF status register bits are set and remain until they are reset and the reverse polarity condition is removed.

  • Page 54: Chapter Iii Installation

    Chapter III Installation ARRAY Chapter III Installation 3.1 Initial Check After receiving the load, please check if there is any obvious damage that may have occurred during the shipment. Please keep the original packing materials in case the load has to be returned to ARRAY in future.

  • Page 55: Poweron/Self-Check

    Chapter III Installation ARRAY 3.3 PowerOn/Self-check A power-on self-test can inspect the basic operations of the load as a preliminary test method for the load acceptance. Before powering on the load, please check the AC power-line voltage to make sure that the voltage of the Toggle Key on the rear panel is the same with the local power supply voltage.

  • Page 56: Connection Of The Rear Panel

    　 Chapter III Installation ARRAY 3.4 Connection of the Rear Panel The rear panel of 375XA Electronic Load is shown as Fig. 3-1, which mainly includes test input parts, AC input parts and communication interface parts. The AC input parts include AC input socket, the fuse holder and the voltage toggle key.
  • Page 57 Chapter III Installation ARRAY and reduce the measurement error, a thick cable is suggested to use in a large current test. 3. Remote Voltage Test Terminal There are two remote voltage test terminals (SENSE+, SENSE-) one the rear panel, for the remote voltage test to prevent the affect on the voltage test of the voltage drop of the load input wiring and to improve the accuracy of the voltage measurement.

  • Page 58: Connection Of The Front Panel

    　 Chapter III Installation ARRAY GPIB interface The load provides a GPIB interface, whose address can be set in the range from 0 to 30 in the port configuration menu. When multiple GPIB devices are connected, the address of the GPIB for each device should be unique and cannot be used by other devices on the BUS.
  • Page 59 Chapter III Installation ARRAY 1. The external trigger input terminal is a BNC connecting terminal, in which the middle part is input + and the outer case is the input-. It receives 5V TTL-compatible falling-edge trigger signals. In order to get a reliable trigger, the duration time of low level hold be longer than 10us.
  • Page 60 　 Chapter III Installation ARRAY 0000 11.684 0.16072 10.4038 0.2027 9.26529 0.25551 8.25246 0.32242 7.34822 0.40639 6.54304 0.51266 5.82676 0.64616 5.18922 0.81508 4.62026 1.02762 4.1148 1.29593 3.66522 1.6341 3.2639 2.0605 2.90576 2.59809 2.58826 3.2764 2.030378 4.1328 2.05232 5.20864 1.8288 6.56984 1.62814 8.282 Load Line Inductance: When using 375XA, voltage drop and voltage generated due to load line...
  • Page 61 Chapter III Installation ARRAY The diagram above shows how changes in current can affect voltage. Load line inductance can be reduced in two ways: 1. Ensure load wires being as short as possible; 2. Twist the positive and negative load wires together. Current change can be limited by limiting the slew rate or response speed when switching in CR and CC mode.
  • Page 62 　 Chapter III Installation ARRAY Using the wrong polarity, when the reverse voltage is greater than -.3V, the reverse voltage alarm function will be tripped. Do not touch any of the input terminals when the unit is on. Connecting the input terminal to the wrong polarity can damage the DUT and load. Remote Detecting Connection When the current flows through the load, the voltage between the input terminals is lower than the output voltage due to the resistance of the wire connecting the power supply and the load.
  • Page 63 Chapter III Installation ARRAY...

  • Page 64: Chapter Iv Local Operation

    Chapter IV Local Operation ARRAY Chapter IV Local Operation Chapter II Functions & Features briefly introduced the local operation of the load. This chapter will explain the local operation in details with examples. 4.1 Local Control If it is needed to control the load from the front panel, the load must be in local control status. The load enters into local control status when it is powered on.

  • Page 65: Connecting To The Power Supply

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY  Trigger Operation  Main Menu 4.3 Connecting to the Power Supply Connect the positive pole of the power supply to the red terminal “+” of the input (INPUT) on the rear panel, and connect the negative pole of the power supply to the black terminal “-” of the input (INPUT) on the rear panel.
  • Page 66 CC mode has two ranges: the high range (CCH) and the low range (CCL). Example 1: Take 3751A as an example, in CVL mode, set the load as CCH mode, the current level is 80A. Turn on the load. The procedures are shown as below:...
  • Page 67 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY the number keypad; move the cursor to the digit position via the key, then enter number 0 via the knob or the number keypad; then press key to confirm; Step 5: Switch to current limit option via keys; Step 6: Move the cursor to the ten position via the key, then enter number 2 via the knob or the number keypad;...

  • Page 68: Cv Mode

    4.5.2 CV Mode Example 1: Take 3751A as an example, in CCH mode, set the load as CVH mode, the voltage level is 50V. Turn on the load. The procedures are shown as below: Step 1: Press key to enter into mode and parameter setting menu;...
  • Page 69 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY the number keypad; move the cursor to the digit position via the key, then enter number 0 via the knob or the number keypad; then press key to confirm; Step 5: Switch to voltage limit option via keys; Step 6: Move the cursor to the hundred position via the key, then enter number 1 via the knob or the number keypad;...

  • Page 70: Cr Mode

    Notes: In CV mode, the green will be displayed in the LCD. Example 3: Take 3751A as an example, in CCH mode, set the load to CVL mode, the voltage level is 50V. Turn on the load. The procedures are shown as below:...
  • Page 71 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY ；Open the load Example 2: In CRH mode, set the resistance level to 20KΩ, the Volt Start voltage to 15V, the resistance limit to 80KΩ, the current rising rate 0.5A/us and the current falling rate 0.2A/us. Turn on the load. The procedures are shown as below: Step 1: Switch to parameter setting menu via keys;...
  • Page 72 4.5.4 CP Mode Example 1: Take 3751A as an example, in CRL mode, set the load to CP mode, the power level is 1000W. Turn on the load. The procedures are shown as below: Step 1: Press key to enter into mode and parameter setting menu;...
  • Page 73 ；Open the load Example 2: Take 3751A as an example, in CRH mode, set the load to CP mode, the power level to 1000W, the VON voltage to 15V, the power limit to 1200W, the current rising rate 10A/us and the current falling rate 6A/us.

  • Page 74: Cc+Cv Mode

    4.6 +CV Mode 4.6.1 CC+CV Mode Example : Take 3751A as an example, in CCH mode, set the load to CCH mode, the current level to 80A, the voltage limit to 50V. Turn on the load. The procedures are shown as below:...

  • Page 75: Cr+Cv Mode

    ； Open the load 4.6.2 CR+CV Mode Example 1: Take 3751A as an example, in CRL mode, set the resistance level to 1.5Ω, the voltage limit to 20V. Turn on the load. The procedures are shown as belows: Step 1: Switch to mode by pressing key simultaneously;...

  • Page 76: Cp+Cv Mode

    ； Open the load 4.6.3 CP+CV Mode Example : Take 3751A as an example, in CP mode, set the power to 1000W, the voltage limit to 30V. Turn on the load. The procedures are shown as below: Step 1: Switch to mode by pressing key simultaneously;...

  • Page 77: Continuous Transient Operation

    4.7.1 Continuous Transient Operation Example : Take 3751A as an example, set the voltage level periodically switch between 10V and 150V, the time for rising edge to 10ms, the high level time to 200ms, the time for falling edge to...
  • Page 78 　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY procedures are shown as below: Step 1: Press dynamic key to enter into transient mode and the parameter setting menu; press key to enter into mode; then press dynamic key to mode; as in the following diagram： Step 2: Select “L_Level”...

  • Page 79: Pulsed Transient Operation

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY key to confirm; Step 7: Select “FallTime” via key or keys; enter the time for falling edge 0.02000 by the number keypad, or via knob with keys; then press key to confirm; Step 8: Select “Mode” via key or keys;...
  • Page 80 　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 2: Select “L_Level” via key or keys; enter the transient low level 1 by the number keypad, or via knob with keys; then press key to confirm; Step 3: Select “H_Level” via key or keys; enter the transient high level 5 by the number keypad, or via knob with keys;...

  • Page 81: Toggled Transient Operation

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY ； Set the mode MODE ； Enter into transient mode SYST:STAT TRAN ； Set the transient low level CURR ； Set the transient high level CURR: TLEVel ； Set the low level time TRAN:LTIME ； Set the high level time TRAN:HTIME ；...
  • Page 82 　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 4: Select “LowTime” via key or keys; enter the low level time 0.10000 by the number keypad, or via knob with keys; then press key to confirm; Step 5: Select “LowTime” via key or keys; enter the low level time 0.10000 by the number keypad, or via knob with keys;...

  • Page 83: List Operation

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY ； Set the time for falling edge TRAN:FTIMR ； Select the transient operation mode TRAN:MODE TOGG ； Open the load ；Trigger initialization INIT ；Execute one toggle operation TRIG 4.8 List Operation The operation procedures for list operation are shown as below: 1.
  • Page 84 　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY linking, OFF means non-linking.) via the knob or the keys; then press key to confirm; Select the chained sequence number or whether or not chained Select Step QTY function via key and enter the set step number via the knob or the keys;...
  • Page 85 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY 1Ω, 1S; Step 5: CP, 200W, 1S. The cycle times is 10; disable the sequence chain; start the sequence operation; stop the sequence operation. The operation procedures are as below: Step 1: Press dynamic key to enter into list operation mode and the parameter setting menu at initial interface, as shown in the following diagram: Step 2: Set the sequence Number to 0 via the keypad or via the knob and then press key to...
  • Page 86 　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 8: Select Step 001 via keys; select Mode and set mode to CCL via the knob; then select Value option via TAB key; set the value to 1.0000 via keys or via the knob; then select Time option via TAB key; set the value to 1.000 via keys or via the knob;...

  • Page 87: Starting/Stopping The List

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY then select Value option via TAB key; set the value to 200.00 via keys or via the knob; then select Time option via TAB key; set the value to 1.0000 via keys or via the knob; Step 13: Press dynamic key to return to the list operation menu;...

  • Page 88: Saving And Recalling

    　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 5: Press dynamic key to return to the initial operation menu. The corresponding SCPI commands of the above procedures should be as follows: ；Call the sequence numbered 0 LIST: NUMB ；Start the list operation LIST ；Stop the list operation LIST 4.9 Saving and Recalling The operation procedures for transient operation are shown as below:...
  • Page 89 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Example 1: Set the load to CCL mode; set the current be 2A. Open the load; save the parameters of the status to location 0 in the EEPROM; open the load and upload automatically: Step 1: Set the load CCL mode and the current 2A, then open the load (For details, please refer to 4.5.1.);...

  • Page 90: Checking And Clearing Protection Setting

    　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY ；Turn off the load ；Recall the values in Location 0 in EEPROM *RCL 4.10 Checking and Clearing Protection Setting The operation procedures for checking and clearing protection setting are shown as below: 1. Eliminate the reasons for the protection of electronic load first; 2.

  • Page 91: Trigger Operation

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY ；Clear the protection status INP:PROT:CLE 4.11 Trigger Operation When the trigger mode is external mode (EXTernal), the operation procedures for trigger operation are shown as below: 1. Set the trigger function (Refer to 2.8 for details.); 2. The trigger terminal (TRIGIN) receives a TTL falling edge signal, and a trigger occurs. Example 1: Select “List”...

  • Page 92: Buzzer

    　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Press keys to select the menu item; Press key to confirm; Press dynamic key to exit the main menu. 4.12.1 Buzzer Example: Buzzer disabled. The detailed procedures are as below: Step 1: Press dynamic key to enter into the main menu; Step 2: Select Buzzer via keys or keys and press...

  • Page 93: Trigger

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY press key to confirm; Step 4: Press dynamic key to exit the main menu. 4.12.3 Trigger Example: Encoder disabled. The detailed procedures are as below: Step 1: Press dynamic key to enter into the main menu; Step 2: Select Trigger via keys or keys and press key to confirm;...

  • Page 94: Safety Code

    　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 4: Press dynamic key to exit the main menu. 4.12.6 Safety Code Change the safety code. The detailed procedures are as below: Step 1: Press dynamic key to enter into the main menu; Step 2: Select Secure via keys or keys and press key to confirm;...

  • Page 95: Date

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 3: The above diagram will be displayed; Step 4: Enter the system safety code: 003751 （the factory default safety code）via the number keypad, then press key to confirm. Step 5: Enter 123456 via the number keypad and press key to confirm.

  • Page 96: Language

    　 Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 4: Select the set date via keys or keys. After pressing key, the initial interface will display the set date; Step 5: Press dynamic key to exit the main menu. 4.12.8 Time Example: Check time information. The detailed procedures are as below: Step 1: Press dynamic key to enter into the main menu;...

  • Page 97: System Default

    Ｃｈａｐｔｅｒ　ＩＶ　Ｌｏｃａｌ　Ｏｐｅｒａｔｉｏｎ ARRAY Step 3: The following diagram will be displayed; Step 4: If Yes is chosen, the language will be switched; if No is not chosen, the language will not be switched; Step 5: Press dynamic key to exit the main menu. 4.12.10 System Default This menu will help to restore the factory default settings.

  • Page 98: Communication Interface

    Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY Chapter V Remote Programming Operation The load supports both local operation and remote control. Previous chapters have introduced in details how to operate the load via the front panel keys and the knob. This chapter will introduce how to remote program the load via the remote interfaces. The similarities between the local operation and the remote programming will become apparent as your reading this chapter.

  • Page 99: Gpib

    Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY 5.1.3 GPIB GPIB interface is the optional configuration of the load. Only installing the GPIB communication module in the load and installing the corresponding GPIB communication module driver in the PC, the function can be used. Correctly connect the load and the PC via the GPIB interface, select GPIB interface in “I/Oconfig”...
  • Page 100 Chapter V Remote Programming Operation ARRAY Step 1: Press key to enter into the I/O configuration set menu as in the following diagram: Step 2: Select the COM menu item via keys, then press key to enter; Step 3: Select the Baud Rate menu item via keys, set the parameter to 9600 via the knob and then press key to enter;...
  • Page 101 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY knob and then press key to enter; Step 7: Press dynamic key to exit the COM menu; Step 8: Press dynamic key to exit the “I/OConfig” menu. Example 2: Select GPIB communication port and set the address to 4. Step 1: Press key to enter into the I/O configuration set menu as in the following diagram:...

  • Page 102: Sending Remote Setting Commandsb

    Chapter V Remote Programming Operation ARRAY 5.2 Remote Programming Display When the load receives the remote command: SYSTem: REMote via RS232, USB or GPIB, the remote status at the upper right corner will be displayed and the load will be in remote control status.

  • Page 103: Basic Test Mode

    Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY 《Array 375XA Electronic Load SCPI Programming Guide》 for detailed information. The main functions of the load can be remotely programmed by some relative commands. Then following points are important when remotely programming the current level, the resistance level, the voltage level and the power level.

  • Page 104: Cv Mode Example

    Chapter V Remote Programming Operation ARRAY 5.7 CV Mode Example Example: Preset the trigger voltage to 5V, and then select the external trigger source. ；Turn off the load’s input l "INP OFF" ；Select the CV Mode 2 "MODE CV" ；Preset the trigger voltage to 5V 3 "VOLT:TRIG 5"...

  • Page 105: Pulsed Transient Operation Example

    Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY ；Set the voltage transient low level to 0.5V 4 " VOLT 0.5" ；Set the voltage transient high level to 1V 5 " VOLT: TLEV 1" ；Set transient low level time to 200us 6 "TRAN:LTIM 200us" ；Set transient high level time to 300us 7 "TRAN:HTIM 300us"...

  • Page 106: Specifications

    Chapter V Remote Programming Operation ARRAY Specifications 3750A 3751A 3752A 3753A 3754A 3755A 3756A Model 0～100A 0～150A 0～75A 0～160A 0～180A 0～240A 0～260A Current 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V Voltage 1500W at 40ºC 2000W at 40ºC 1000W at 40ºC 2400W at 40ºC...
  • Page 107 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY 10mA（100～150A） 10mA（100～160A） 10mA（100～180A） 10mA（100～240A） 10mA（100～260A） 0.2%+10mA 0.2%+10mA 0.2%+10mA 0.2%+10mA 0.2%+10mA 0.2%+10mA 0.2%+10mA Accuracy Constant Voltage Mode 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V Range 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） Resolution 10mV（100～240V）...
  • Page 108 Chapter V Remote Programming Operation ARRAY Constant Power Mode Range 0～1500W 0～2000W 0～1000W 0～2400W 0～3000W 0～4000W 0～5000W Resolution @P ＜ 100W 10mW 10mW 10mW 10mW 10mW 10mW 10mW @P≥100W 100mW 100mW 100mW 100mW 100mW 100mW 100mW @P≥1000W 0.2%+600mW 0.2%+600mW 0.2%+600mW 0.2%+600mW 0.2%+600mW 0.2%+600mW...
  • Page 109 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V 0～240V Range 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） 1mV （0～100V） Resolution 10mV（100～240V） 10mV（100～240V） 10mV（100～240V） 10mV（100～240V） 10mV（100～240V） 10mV（100～240V） 10mV（100～240V） 0.1%+8mV 0.1%+8mV 0.1%+8mV 0.1%+8mV 0.1%+8mV 0.1%+8mV 0.1%+8mV Accuracy Power Measurement 0～1500W 0～2000W...
  • Page 110 Chapter V Remote Programming Operation ARRAY Continuous, Continuous, Continuous, Continuous, Continuous, Continuous, Continuous, Transient Mode Pulse, Toggled Pulse, Toggled Pulse, Toggled Pulse, Toggled Pulse, Toggled Pulse, Toggled Pulse, Toggled 0.025Hz～50kHz 0.025Hz～50kHz 0.025Hz～50kHz 0.025Hz～50kHz 0.025Hz～50kHz 0.025Hz～50kHz 0.025Hz～50kHz Frequency Rang 10us～10s 10us～10s 10us～10s 10us～10s 10us～10s...
  • Page 111 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY Current 10A/us 15A/us 7.5A/us 16A/us 18A/us 20A/us 22A/us Voltage 0.5V/us 0.6V/us 0.5V/us 0.6V/us 0.6V/us 0.6V/us 0.6V/us Programmable ≥20kΩ ≥20kΩ ≥20kΩ ≥20kΩ ≥20kΩ ≥20kΩ ≥20kΩ Open Circuit Trigger Input Trigger Level TTL falling edge TTL falling edge TTL falling edge TTL falling edge TTL falling edge TTL falling edge...
  • Page 112 Chapter V Remote Programming Operation ARRAY Environmental Conditions Temperature 0～50ºC 0～50ºC 0～50ºC 0～50ºC 0～50ºC 0～50ºC 0～50ºC Relative ≤85% ≤85% ≤85% ≤85% ≤85% ≤85% ≤85% Humidity Remote RS232, GPIB, USB RS232, GPIB, USB RS232, GPIB, USB RS232, GPIB, USB RS232, GPIB, USB RS232, GPIB, USB RS232, GPIB, USB Interface...
  • Page 113 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY *1. The maximum continuous input power can reach the rated power at 40ºC; the maximum continuous input power will linearly decrease from 100% to 75% between 40ºC to 50ºC. *2. The current change rate is 600mA/us in CCL mode. *3.

  • Page 114: Frame Diagram

    Chapter V Remote Programming Operation ARRAY Frame Diagram Fig.1...
  • Page 115 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY...
  • Page 116 Chapter V Remote Programming Operation ARRAY Fig.2...

  • Page 117: Declarations

    Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY Declarations Toxic or Hazardous Substances and Elements in Electronic Information Products Toxic or Hazardous Substances and Elements Lead Mercury Cadmium Hexavelent Polybrominated Polybrominated (Ph) (Hg) (Cd) Chromium Biphenyls Biphenyl Ethers Part Name (Cr(VI)) (PBB) (PBDE) ○ ○ ○ ○...
  • Page 118 Chapter V Remote Programming Operation ARRAY date of the equipment. roducts in normal The environmental protection period of the p use will be up to 10 years. After the environmental protection period, please do a good classified work to the Recyclable and Unrecyclable items to protect the environment.
  • Page 119 Ｃｈａｐｔｅｒ　Ｖ　Ｒｅｍｏｔｅ　Ｐｒｏｇｒａｍｍｉｎｇ　Ｏｐｅｒａｔｉｏｎ ARRAY RECORDS DATE REVISION EDITION DESCRIPTION ECO NO 2016-04-13 INITIAL VERSION 2017.01.16 ADD MODEL...

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