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MEL8500 Series Programmable DC Electronic Loads

MEL8500 series single-channel programmable electronic load, power from 150W to 300W, resolution up to 10mV/1mA, with dynamic, automatic test, List, battery and short and other test functions. Mainly used in batteries, AC-DC/DC-DC modules, chargers and electronic components and other product performance testing, Provide the best solution for design development and production line testing.

Key words:

MEL8500 Series Programmable DC Electronic Loads

Classification:

MEL8500 Series Programmable DC Electronic Loads

  • Product Description

  • Product Introduction

    MEL8500 series single-channel programmable electronic load, with power ranging from 150W to 300W and resolution up to 10mV/1mA, has various test functions such as dynamic, automatic test, List, battery and short. Mainly used in batteries, AC-DC/DC-DC modules, chargers and electronic components and other product performance testing, for the design and development and production line testing to provide the best solution.

    Features

    High resolution liquid crystal display (LCD);

    Resolution up to 10mA/1mA;

    Voltage and current measurement rate up to 40KHZ;

    Four operation modes are provided: constant voltage, constant current, constant power and constant resistance;

    Professional battery test test function;

    Over-current and over-power test function;

    Measure the measurement function to measure the voltage rise and fall time;

    Automatic test mode;

    List mode, can simulate a variety of load state changes;

    Short circuit mode;

    Memory capacity up to 10 groups;

    Intelligent fan control;

    Power off keeps memory function.

    Model

    Serial Number

    Model

    Power

    Voltage

    Current

    Communication Interface

    1

    MEL8502-150-30

    200W

    150V

    30A

    RS232/485/LAN

    2

    MEL8502-500-15

    200W

    500V

    15A

    3

    MEL8503-150-30

    300W

    150V

    30A

    4

    MEL8503-500-15

    300W

    500V

    15A

    5

    MEL8502K-150-15

    150W

    150V

    15A

    Battery discharge test function

    MEL8500 series can use constant current mode for battery discharge testing. After entering the battery discharge test mode, the termination conditions of the test mode can be set by itself, including discharge time, shutdown voltage value and shutdown capacity value. After the test starts, when any of the above three conditions is met, the discharge will stop and the electronic load will automatically switch to OFF state. During the test, the voltage, time and discharge capacity of the battery can be observed.

    Automatic test function

    The MEL8500 series has an automatic test editing mode that can save up to 10 sets of test files. The user can edit the required steps by himself, and can call and test at any time. At the same time, the keys can be completely locked to prevent accidental touching of the keyboard from affecting the normal test of the user and making the test operation easier.

    OCP test function

    MEL8500 series has over-current protection (OCP) test function. In OCP test mode, when the input voltage reaches Von value, the current starts to work with a delay of a period of time, and increases by step value at regular intervals. At the same time, it detects and judges whether the input voltage of electronic load is higher than OCP voltage value according to OCP voltage value. If it is higher, it will run down and continue to increase with delay according to cut-off current value, until the operation to cut off the current. After judging by the OCP voltage value, it is judged whether the current is within the range according to the set overcurrent range value.

    OPP test function

    MEL8500 series has over power protection (OPP) test function. In OPP test mode, when the input voltage reaches Von value, the power starts to work after a period of delay, and increases by step value at regular intervals. At the same time, it is detected and judged whether the load input voltage is higher than OPP voltage value according to OPP voltage value. If it is higher, it will run down and continue to increase according to the cut-off power value, until running to the cut-off power value. After judging by the OPP voltage value, it is judged whether the power is within the range according to the set over-power range value.

    Remote measurement function

    The dynamic test operation can switch the electronic load between two setting parameters according to the setting rules. This function is used to test the dynamic characteristics of the power supply.

    Continuous mode
    In continuous mode, the user enters the set A,B values. After the dynamic test is turned on, the load current will continuously switch between the value and the B value.

    Pulse mode
    In the pulse mode, after the dynamic test is started, the load will switch from the value to the B value every time it receives a trigger signal, and switch back to the value after maintaining the pulse width time set by B.

    Flip mode
    In the trigger mode, after the dynamic test is turned on, the load will switch between the value and the B value every time it receives a trigger signal.

    Sequential Operation Mode (LIST)

    In LIST mode, the user can define the number of steps, single step time and set value, slope. This mode can accurately complete complex arbitrary current change mode at high speed, and this change mode can be synchronized with internal or external signals to complete the tight test of multi-level with load, which can greatly save costs for customers. The parameters in the sequence operation include the name of the set of input sequence files, the number of input steps (up to 2-84 steps), the single step time (0.00005s ~ 3600s), and the set value and slope of each single step. When the operation mode of the load is sequential operation, upon receiving a trigger signal, the load will start sequential operation until the sequential operation is completed or a trigger signal is received again.

    Panel Introduction

    1. USB interface
    2. Power key
    3. Menu key area
    4. Display
    5. Digital/function key area
    6. Input Terminal
    7. Left and right movement keys
    8. Knob
    9. Power outlet
    10. 110V/220V transfer switch
    11. RS232/485
    12. AC220V power socket
    13. SENSE Interface
    14. LAN Interface

    Dimensional Description

    Technical parameter table

    * 1 Voltage/current input value is not less than 10% FS(FS is full scale)
    * 2 Resistor readback value range:( 1/(1/R (1/R)* 0.01 .08),1/(1/R-(1/R)* 0.01 .08))
    * 3 Voltage/current input value not less than 10% FS
    * 4 rising/falling slope: rising slope of 10% ~ 90% current from 0 to maximum current
    * 5 Minimum rise time: 10% ~ 90% current rise time



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