Basic knowledge of electronic load and troubleshooting methods

Programmable DC Electronic load is a device that accurately adjusts the power dissipation of load voltage and current and consumes electrical energy. The electronic load should have perfect protection function. The protection function is divided into internal (electronic load) protection function and external (equipment under test) protection function. Internal protection includes: over voltage protection, over current protection, over power protection, voltage reverse and over temperature protection. External protection includes: over current protection, over power protection, overload voltage and low voltage protection. When choosing an electronic load, you should choose an electronic load with a true protection function. If the function is realized by hardware, the protection speed will be very fast.If it is implemented by software, the speed is lagging, and

Programmable DC electronic load is a device that accurately adjusts the power dissipation of load voltage and current and consumes electrical energy. The electronic load should have perfect protection function. The protection function is divided into internal (electronic load) protection function and external (equipment under test) protection function. Internal protection includes: over voltage protection, over current protection, over power protection, voltage reverse and over temperature protection. External protection includes: over current protection, over power protection, overload voltage and low voltage protection. When choosing an electronic load, you should choose an electronic load with a true protection function. If the function is realized by hardware, the protection speed will be very fast. If it is implemented by software, the speed is lagging, and the module crashes, it will be dangerous.

Due to the special performance of electronic loads (providing a powerful test environment to meet different external needs), it occupies a large market in electronic instrumentation and is mainly suitable for various power supplies, batteries, adapters and occasions that require electronic load testing.

Do you have the following confusion in using electronic load? The following is the fault self-check method recommended by Antai engineers for you.

2. Self-examination method for electronic load failure:

1. The instrument cannot be turned on.

(1) Check whether the power cord is properly connected.

(2) Check whether the power switch on the front Panel is turned on.

(3) Unplug the power cord, check whether the Voltage Selector is in the correct position, whether the fuse is in the correct specification and whether it is intact.

2. The constant current load is abnormal.

(1) Check whether the connection between the instrument and the device under test is reversed, causing a reverse connection alarm on the instrument.

(2) Check whether the input voltage and the current value of the load exceed the rated power of the instrument, causing the instrument to appear over-power protection.

(3) Check whether the range setting of the load current is appropriate.

3. The constant voltage input is abnormal.

(1) Check whether the connection between the instrument and the device under test is reversed, causing a reverse connection alarm on the instrument.

(2) Check whether the highest output voltage of the device under test is less than the voltage set by the electronic load.

(3) Check whether there is a problem with the device under test.

4. The constant resistance input is abnormal.

(1) Check whether the output of the device under test is normal, for example, the device oscillates.

(2) Check whether the resistance range setting of the instrument is appropriate.

5. The constant power input is abnormal.

(1) Check whether the connection between the instrument and the device under test is reversed, causing a reverse connection alarm on the instrument.

(2) Check whether the output of the device under test is normal, for example, the power supply oscillates, or the rated power of the power supply cannot reach the set power of the electronic load.

6. The constant current dynamic characteristic test is abnormal.

(1) Check whether the connection between the instrument and the device under test is reversed, causing a reverse connection alarm on the instrument.

(2) If the measured constant current slope cannot meet the specification standard, please shorten the connection wire between the device under test and the instrument as much as possible, because too long a wire will cause the slope to slow down.

(3) Check whether the range setting of the load current is appropriate.

7. The U disk cannot be recognized correctly.

(1) Check whether the U disk can work normally.

(2) Make sure that the FAT32 format Flash type U disk is used. This instrument does not support hard disk type U disk.

(3) After restarting the instrument, insert the U disk to check.

8. Why are the working modes of the load and power supply opposite?

In practical applications, the working mode of the electronic load is usually opposite to that of the power supply, that is, the constant voltage CV source needs to use the constant current CC mode electronic load, and the constant current CC source uses the constant voltage CV mode electronic load.