How to calibrate a Vickers hardness tester before use?

1. Calibration of the Vickers hardness tester before use generally involves measuring a standard block to see the difference between the actual measured value and the value of the standard hardness block. Generally, if it is within the error range, it is considered qualified.
2. The verification certificate for a Vickers hardness tester is generally issued by the metrology department and possesses authenticity.
3. In fact, if a metrological verification certificate is not required, simply measuring the standard block yourself is sufficient.

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