Why does the information not match what the coating thickness gauge measures
To avoid measuring inaccuracy brought on by different materials' varying magnetic permeability, try to utilize the measured material as the zero-adjustment substrate when using a coating thickness gauge. The edge and centre of the workpiece on the side face should be zeroed independently. After the same part of the material to be measured has been zeroed, the measurement of the same part should be done.
It is also important to keep the probe and the surface of the material being measured vertical when using a coating thickness gauge to prevent significant inaccuracies. In order to prevent the magnetization of the probe of the material being tested from affecting the measurement results, the probe can be removed from the test object by more than 10 cm each time the measurement is made at the same place.
The coating thickness gauge's exterior surface, which is utilized for zero adjustment, must be kept as smooth as possible. If the outer surface is not smooth, the average value should be used appropriately because the outer surface's roughness significantly affects the measured value. To avoid measurement errors caused by different structures, different structures should do their own zero-adjustment measurements, zero-adjust the plane, measure the concave surface after zero-adjustment, and measure the convex surface after zero-adjustment.
