Coating Thickness Gauge Troubleshooting

A thickness gauge is an instrument used to measure the thickness of an object. It is often used in industrial production to continuously measure the thickness of products, such as steel plates, steel strips, paper, etc. The coating thickness gauge can measure the thickness of non-magnetic coatings on magnetic metal substrates, chrome, copper, enamel, rubber, paint, etc., and the thickness of non-conductive coatings on non-magnetic metal substrates, such as: enamel, rubber, paint , plastic, etc.

Coating thickness gauges generally use electromagnetic induction to measure the thickness of coatings. The working probe is placed on the surface of the component to be tested, thus creating a closed magnetic circuit. As the distance between the moving probe and the ferromagnetic material changes, the magnetic circuit will change to varying degrees, causing magnetic resistance and changes in the inductance of the probe coil. Using this principle, the distance between the probe and the ferromagnetic material can be accurately measured, which is the measured coating thickness. Coating thickness gauges can be used not only for precise measurement in the laboratory, but also in engineering fields and are widely used in metal manufacturing, chemical industry, aerospace, scientific research and development and other fields. Now, let’s troubleshooting the coating thickness gauge.

Coating Thickness Gauge Troubleshooting

1. The value display is unstable
   The reason for the instability of the display value of the thickness gauge is mainly from the particularity of the material and structure of the workpiece itself, such as whether the workpiece itself is a magnetically conductive material. If it is a magnetically conductive material, we must choose a magnetic coating thickness gauge. If the workpiece is a conductor, we have to choose an eddy current coating thickness gauge, and the surface roughness and attachments of the workpiece are also the reasons why the instrument shows no temperature. The surface roughness of the workpiece is too large and the surface attachments are too large. The main point of troubleshooting is to smooth the workpiece with relatively large roughness, remove the attachments, and then select a suitable coating thickness gauge.
2. There are too many errors in the measurement results
   The main reasons for the large measurement error of the coating thickness gauge are: the magnetization of the base metal, the thickness of the base metal is too small, the edge effect, the curvature of the workpiece is too small, the surface roughness is too large, the placement method of the magnetic field interference probe, etc.
3. No numbers are displayed
   The reason why the coating thickness gauge does not display numbers is that the battery power is insufficient. After ensuring that the battery power is sufficient, the measurement will display the value.