How to calibrate a coating thickness gauge in a systematic way
How to calibrate coating thickness gauge systematically? The coating thickness gauge can non-destructively measure the thickness of non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) and non-magnetic coatings on magnetic metal substrates (such as steel, iron, alloys and hard magnetic steel, etc.) The thickness of the non-conductive coating (such as enamel, rubber, paint, plastic, etc.) on the metal substrate (such as copper, aluminum, zinc, tin, etc.).
Coating thickness gauge has the characteristics of small measurement error, high reliability, good stability and easy operation. It is an indispensable testing instrument for controlling and ensuring product quality. It is widely used in manufacturing, metal processing industry, chemical industry, Commodity inspection and other inspection fields. So, how to systematically calibrate the coating thickness gauge? Zhuhai Tianchuang Instrument Co., Ltd. will give you a brief introduction:
Calibration methods and types This is a problem that new users often encounter. System calibration, zero-point calibration and two-point calibration have actually been written in the instructions. Users only need to read them carefully. It should be noted that when calibrating the iron base, it is necessary to measure several times to prevent incorrect operations; the samples for system calibration should be carried out in order from small to large. If individual standard pieces are lost, you can find sample pieces with similar values to replace them.
Coating thickness gauge temperature compensation measurement method
The temperature compensation measurement method of the coating thickness gauge includes the temperature coefficient calibration step, the power-on zero calibration step and the thickness measurement step, and finally calculates the actual coating thickness dx value; using the correlation between the electromagnetic field change of the inductor coil and the temperature, that is, During the measurement process, the value at the infinite end is measured once. The temperature change coefficient at the infinite end is proportional to the temperature change coefficient when the measuring probe is close to the base of the measured object for measurement. Using this feature to achieve temperature compensation can reduce the temperature measurement error as much as possible. The measurement error of this method can basically be controlled within 1%. However, our current national standard requires that it be within 3%. By comparison, the measurement error of this method is The measurement accuracy has reached the measurement accuracy of international brand machines, which is still at a very high level in China.
