What should I do if the coating thickness gauge shows unstable values?
The factors that cause the coating thickness gauge to show unstable values mainly come from the particularity of the material and structure of the workpiece itself. For example, whether the workpiece itself is a magnetically permeable material. If it is a magnetically permeable material, we must choose magnetic coating thickness measurement. If the workpiece is a conductor, we have to choose an eddy current coating thickness gauge. In addition, the surface roughness and attachments of the measured part are also important factors that cause the instrument's indication to be unstable. The probe of the thickness gauge is extremely sensitive to 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 overlay. Therefore, the key to eliminating this kind of failure is to remove dust, fine chips, grease, corrosion products and other attachments on the contact surface of the test piece before measurement, but do not remove any covering material. Furthermore, when performing system zero adjustment, the surface of the substrate used must also be clean and lubricated. If you feel that the measurement result error is relatively large, please first do a round of testing with the plastic calibration sheet provided with the instrument. If the error exceeds the allowed error, there may be a problem with the instrument itself and it needs to be returned to the manufacturer for maintenance. The appropriate substrate 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.
No data appears on the screen
The simple factor is to check whether the battery power is sufficient. After confirming that the battery power is sufficient, if you find that the measurement still does not display the value, you can consider whether the probe and connection are loose, disconnected or have poor contact, or the battery is corroded due to leakage. Affected by factors such as electronic components within the instrument. In actual work, the editor has encountered the phenomenon that the probe was corroded by chemicals due to improper use, resulting in the instrument not displaying data.
