Calibrating intervals for coating thickness gauges
Paint film thickness gauge is widely used in manufacturing, metal processing industry and chemical industry and other industries of production inspection, quality control and quality supervision and inspection. With the surface protection of industrial products, decoration of the formation of the thickness of the covering layer of measurement and control requirements continue to improve, these cladding such as coatings, plating, layering, laminating, chemical film thickness measurement technology and instrumentation development is also accelerating, film thickness measurement has become an important part of the quality control of industrial product surface engineering testing.
Paint film thickness gauge by the national measurement department of the validity of one year, but the paint film thickness gauge and a lot of length measurement instruments are not the same. Most of the length measuring instruments can be used directly after passing the test, do not need to be calibrated at any time. But the paint film thickness gauge due to the substrate material, roughness and other factors, in the actual use of the process, each time before the use of the calibration is very necessary, if you do not do so, if you use for a long time, the measurement results will have a 3-10% error, if the measurement value is relatively large, the feeling is not obvious, the measurement value of a small, the problem came out, for example, the customer product spraying thickness of 60um (assuming that the) For example, the thickness of the customer's product is 60um (assuming that the actual value is also 60um), our measurement value is 40um, in this way, the error becomes 20um, the measurement results and the actual deviation is larger, the error exceeds the permissible range.
