Thickness gauge precautions


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Thickness gauge precautions


Release date:2016-07-27


 Thickness gauge precautions

The testing methods for thickness gauges include: magnetic thickness measurement, radiation thickness measurement, electrolytic thickness measurement, eddy current thickness measurement, and ultrasonic thickness measurement.

Measurement Note:

1. During the test, it should be noted that the collective magnetic properties and surface roughness of the standard piece should be similar to those of the test piece.

2. The side of the probe is perpendicular to the surface of the sample.

3. The critical thickness of the base metal should be taken into account when measuring. If it is greater than this thickness, it will not be affected by the thickness of the base metal.

4. Pay attention to the influence of the curvature of the test piece on the measurement. Therefore it is unreliable when measuring on the surface of a curved test piece.

5. Before measuring, pay attention to other surrounding electrical equipment will not produce a magnetic field, if it will interfere with magnetic thickness measurement.

6. Be careful not to measure at the inner corner and near the edge of the specimen when measuring, because the sudden change of the surface shape of the general thickness gauge is very sensitive.

7. Keep the pressure constant while measuring, otherwise it will affect the measurement reading.

8. During the test, it is necessary to pay attention to the direct contact between the instrument's probe and the part under test, so the ultrasonic thickness gage is to remove the attached substances on the opposite side of the head.

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