What is the reason why the coating thickness gauge sometimes has interference when starting up?
After the instrument is turned on, the measurement status arrow appears on the screen of the instrument and the measurement cannot be performed again, which means that the instrument has been interfered. There are two main reasons:
(1) When starting up, the probe is too close to the iron base, which is interfered by the magnetic field of the iron base.
(2) The probe is not inserted properly or the probe line is damaged.
Coating and cladding measurement has become an important part of the quality inspection of the processing industry and surface engineering, and is an essential means for products to meet high quality standards. In order to make products internationalized, there are clear requirements and regulations on the measurement of coating thickness in my country's export commodities and foreign-related projects.
The measurement methods of coating thickness mainly include: wedge-cut coating measurement, optical section coating measurement, electrolytic coating measurement, thickness difference measurement method, weighing method coating measurement, x-ray fluorescence method coating measurement, β Coating measurement by ray backscattering method, coating measurement by capacitance method, thickness measurement by magnetic measurement method and eddy current measurement method, etc. Among these methods, the first five are destructive testing, the measurement methods are cumbersome and slow, and most of them are suitable for sampling inspection. With the increasing progress of science and technology, especially in recent years, the coating thickness gauge using magnetic measurement coating series and eddy current method has taken a big step towards the direction of miniature, intelligent, multi-functional, high-precision and practical. The measurement resolution has reached 1 micron, and the accuracy can reach 1%, which has been greatly improved. The coating thickness gauge has wide application range, wide measuring range, easy operation and low price. It is the most widely used coating thickness gauge in industry and scientific research.
