How to Calibrate Repair Digital Multi-meter Repair Digital Multi-Meter Wrong Reading Multimeter
Digital multimeters are electronic measuring instruments that perform multiple measurements
functions. A digital multimeter usually can measure voltage, resistance, and current, while some models can also perform temperature readings. Each function of a multimeter must be tested to ensure measurement reading accuracy. The only way to determine the validity of a digital multimeter is to perform calibration.
WHY CALIBRATE A DIGITAL MULTIMETER?
Proper functionality of a digital multimeter is essential to ensure accurate measurement
readings; therefore, calibration is vital. Without calibration, chances of errors are likely.
Over time, environment and physical use of a digital multimeter can cause the instrument to drift out of calibration; therefore, it’s important that frequent calibration is performed.
This helps to verify a digital multimeter’s accuracy and performance meets required
specifications.
CHOOSING THE RIGHT CALIBRATOR
When calibrating a digital multimeter, it is important to ensure the correct calibrator is
being used. The calibrator used should be at least four times better than the specifications of the digital multimeter it is testing. It should also cover the functions of the digital
multimeter it is calibration. Digital multimeters usually have at least five functions that
have a variety of functions. The calibrator needs to be able to confirm that the digital
multimeter is suitable to use in full range.
Most digital multimeter manuals will recommend functions and minimum specifications that are needed to calibrate the digital multimeter properly. The manufacturer of the digital multimeter should also provide the needed test points and pass/fail limits.
How to Repair a Multimeter showing wrong values.
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