Measurement Tool for Coating Thickness and Temperature Compensation
The temperature compensation measurement method of the coating thickness gauge includes the steps of temperature coefficient calibration, power-on zero calibration and thickness measurement, and finally calculates the value of the actual coating thickness dx; using the correlation between the electromagnetic field change of the inductance coil and the temperature, that is, in The value at the infinity end is measured once during the measurement process, and the temperature change coefficient at the infinity end is proportional to the temperature change coefficient when the measuring probe is close to the measured object substrate for measurement. Using this characteristic to realize temperature compensation can reduce the temperature measurement error as much as possible. The measurement error of this method can basically be controlled within 1%, while our current national standard requires within 3%. By comparison, the measurement error of this method can be controlled within 1%. The measurement accuracy has reached the measurement accuracy of international brand machines, and it is still at a very high level in China.
Basic usage skills of coating thickness gauge
1. When using a thickness gauge to measure, the probe must be perpendicular to the surface of the measured object;
2. Do not drag the probe when measuring, because this will not only cause wear to the probe, but also will not get accurate measurement results;
3. During the measurement, the probe line should not be bent or shaken excessively at the position where the probe is connected (for the split thickness gauge), which will affect the test effect, so that accurate and stable measurement results cannot be obtained;
4. Try to ensure that the thickness gauge is used and kept by a special person;
5. If you feel that the deviation of the measurement result is relatively large, please use the five pieces of plastic calibration sheets provided at random 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 factory for repair. Remember not to do so. Disassemble and repair by yourself.
