How to calibrate the electronic load current?

Electronic load is an instrument used to simulate load current and is widely used in electronic equipment testing and debugging. In order to ensure the accuracy of electronic load, it needs to be calibrated regularly. This article will introduce the steps and precautions for electronic load current calibration in detail.

I. Preparation before calibration

1. Determine the calibration frequency: The performance of electronic load may vary at different frequencies, so before calibration, it is necessary to clarify the frequency range of calibration.
2. Obtain the calibration device: The calibration device is usually a high-precision current source that can provide accurate current output values ​​for calibration.
3. Determine the calibration point: The calibration point refers to several specific values ​​selected within a certain current range, which will be used for comparison during calibration.

II. Calibration steps

1. Connect the calibration device: Connect the calibration device to the electronic load correctly to ensure the accuracy and stability of signal transmission.
2. Preheat the equipment: Turn on the electronic load and calibration device and let them preheat for a period of time to achieve a stable working state.
3. Adjust the load mode: According to the requirements of the calibration device, adjust the electronic load to the appropriate working mode (such as constant resistance mode or constant current mode).
4. Set calibration points: Adjust the electronic load to the corresponding current value according to the predetermined calibration points. The current value can be set through the front panel of the device or the remote control software.
5. Compare measured values: Use the calibration device to measure the output current value of the electronic load and compare it with the expected value.
6. Adjust the electronic load: According to the measurement results of the calibration device, adjust the settings of the electronic load so that its output current matches the measurement value of the calibration device.
7. Repeat calibration: Repeat the above steps for different calibration points until all calibration points are calibrated.
8. Record calibration data: During the calibration process, record the measurement results and adjustment values ​​of the calibration points in time for future reference.

III. Precautions

1. Temperature calibration: The accuracy of the electronic load will be affected by temperature. Therefore, before calibration, ensure that the temperature of the electronic load and the calibration device is relatively stable and close to room temperature.
2. Measurement accuracy: Select high-precision measurement tools for calibration to ensure the accuracy of the measured values.
3. Interference signals: During the calibration process, interference from interference signals should be avoided as much as possible, such as ground interference, electromagnetic radiation, etc.
4. Voltage influence: In electronic loads, current and voltage are interrelated factors, so during calibration, the voltage of the electronic load needs to be calibrated to ensure the accuracy of the output current.
5. Regular calibration: The performance of electronic loads will change over time, so regular calibration is required to maintain its accuracy.

Calibration is a key step to ensure the accuracy of electronic loads, which can help users obtain reliable test results. During the calibration process, the calibration steps should be strictly followed, and attention should be paid to the recording and preservation of calibration data. Only after accurate calibration can the reliability and accuracy of electronic loads in testing and debugging be guaranteed.