The display value of the coating thickness gauge is unstable?
The factors that lead to the unstable display of the coating thickness gauge mainly come from the particularity of the material and structure of the workpiece itself, such as whether the workpiece itself is a magnetic material. If it is a magnetic material, we must choose a magnetic coating thickness measurement Instrument, if the workpiece is a conductor, we have to choose an eddy current coating thickness gauge. Furthermore, the surface roughness and attachments of the measured piece are also important factors that cause the instrument to display unstable values. The probe of the thickness gauge is extremely sensitive to those attachments that prevent close contact with the surface of the covering layer. It is necessary to ensure that the probe is in direct contact with the surface of the coating. Therefore, the key to eliminating this kind of fault is: remove the dust, fines, grease and corrosion products and other attachments on the contact surface of the tested part before measurement, but do not remove any covering material. In addition, when the system is zeroed, the surface of the substrate used must also be cleaned and lubricated. If you feel that the error of the measurement result is relatively large, please use the plastic calibration sheet equipped with the instrument to do a round of testing first. If the deviation is far from the allowable error, there may be a problem with the instrument itself, and it needs to be returned to the manufacturer for repair. The appropriate matrix was not selected during system calibration. The base facet is 7mm, and the minimum thickness is 0.2mm. Measurements below this critical condition are unreliable.
