Thickness gauge usage analysis

1.
When testing, it should be noted that the metal magnetism and surface roughness of the standard piece group should be similar
to the test piece.
2.
The side head is kept perpendicular
to the surface of the sample during measurement.
3.
Pay attention to the critical thickness of the base metal when measuring, if it is greater than this thickness measurement, 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 when measuring.
Therefore, it is unreliable
when measuring on curved test piece surfaces.
5.
Before measuring, pay attention to whether other electrical equipment around will generate magnetic fields, if it will interfere with the magnetic thickness measurement method
.
6.
When measuring, pay attention not to measure at the inner corner and near the edge of the test piece, because the general thickness gauge specimen surface shape is very sensitive
.
7.
Keep the pressure constant when measuring, otherwise it will affect the reading
of the measurement.
8.
When testing, pay attention to the direct contact between the instrument probe and the test piece, so the ultrasonic thickness gauge is removing the attached substances
on the opposite side.