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Factors That Cause Inaccurate Measurement of Coating Thickness Gauge


1. The strong magnetic field interferes with the measurement results of the coating thickness meter


Experiments have proved that when the coating thickness gauge is working near an electromagnetic field of about 10,000V, the measurement will be severely disturbed. If it is very close to the electromagnetic field, it may crash.


2. Human factors affecting the coating thickness meter


This situation often happens to new users. The reason why the coating thickness meter can measure to the micron level is because it can take a small change in magnetic flux and convert it into a digital signal. In the process of using the instrument to measure, if the user is not familiar with the instrument, the probe may deviate from the measured substrate, causing the magnetic flux to change, resulting in erroneous measurement.


Therefore, it is recommended to master the measurement method when using the coating thickness gauge for the first time. The placement of the probe has a great influence on the measurement. During the measurement, the probe should be kept perpendicular to the surface of the sample. And the placement time of the probe should not be too long, so as not to cause the interference of the magnetic field of the substrate itself.


3. The substrate measured by the coating thickness meter


The minimum plane of the substrate is 7mm, and the minimum thickness is 0.2mm. It is unreliable to measure with a coating thickness gauge below this critical condition.


The coating thickness gauge is sensitive to adhesion substances that prevent the probe from coming into close contact with the surface of the coating. Therefore, the attached material must be removed to ensure that the probe is in direct contact with the surface of the covering layer, especially for the magnetic coating thickness gauge. When performing system calibration, the surface of the selected substrate must also be bare and smooth.


4. The coating thickness meter itself fails


At this time, you can communicate with technicians or return to the factory for repair.


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