How to calibrate a standard digital voltmeter?

The calibration of a standard digital voltmeter is crucial to ensure the accuracy and reliability of its measurement results. Below are the general steps for calibrating a standard digital voltmeter:

Preparation: Before calibration, ensure that a standard voltage source and other necessary calibration equipment are prepared.

Environmental Conditions: Ensure that the calibration environment meets standards, avoiding factors such as temperature and humidity that could affect calibration results.

Connect Equipment: Connect the digital voltmeter to be calibrated to the standard voltage source, ensuring proper connections.

Apply Standard Voltage: Apply a known standard voltage value to the digital voltmeter through the standard voltage source.

Calibration Adjustment: Based on the difference between the actual reading and the standard value, adjust the calibration knob or button on the digital voltmeter to match its display value with the standard value.

Multi-point Calibration (Optional): For higher precision, conduct a multi-point calibration by performing calibration adjustments at different standard voltage values.

Verify Calibration: After calibration, recheck if the digital voltmeter's reading matches the standard voltage value to confirm the calibration effect.

Record Data: During the calibration process, record the actual readings and adjusted values for each calibration point for future reference.

Complete Calibration: Once calibration is complete, disconnect the connections promptly and place the digital voltmeter in an appropriate location for future use.

In summary, calibrating a standard digital voltmeter requires careful and patient execution to ensure accuracy and reliability. If unsure about the calibration process, it is recommended to seek the assistance of professionals or the manufacturer to ensure correctness and safety.