Coating Thickness Gauge Troubleshooting Method and Selection Guide
Troubleshooting methods of coating thickness gauges and options refer to coating thickness gauges for nondestructive testing. The failures of coating thickness gauges mainly include unstable display, large errors, and no display values. The causes of these failures come from the instrument itself, from the workpiece under test, and from the influence of the natural environment. Below we introduce the methods to eliminate these failures.
Indication is unstable
The main reason for the instability of the display value of the coating thickness gauge is the particularity of the material and structure of the workpiece itself, such as whether the workpiece itself is a magnetic material. If it is a magnetic 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. many. The main point of troubleshooting is to polish the workpiece with relatively large roughness to remove the attachment, and then choose a suitable coating thickness gauge.
There are too many errors in the measurement results
The reasons for the large measurement error of the coating thickness gauge have been introduced clearly in previous articles. The main reasons for the large measurement error are: the magnetization of the base metal, the thickness of the base metal is too small, the edge effect, and the curvature of the workpiece is too small , The surface roughness is too large, the placement method of the magnetic field interference probe, etc.
no numbers
The simple reason why the coating thickness gauge does not display numbers is to check whether the battery is fully charged, and if it is found that the battery is fully charged, the measurement still does not display the value.
Many customers don't know which one they need to test their products. There are too many products in the market, which is easy to be confused. Here are a few situations for you:
1. What to test (the thickness of the product? Or the thickness of the layer of paint on the product) The first step is to clarify whether the coating thickness gauge is needed or to test the overall thickness of the substrate.
2
. The substrate of the test (is it magnetic (steel, iron, alloy and hard magnetic steel, etc.) or aluminum (such as copper, aluminum, zinc, tin, etc.) The second step is to distinguish what the substrate is? This can distinguish whether it can be tested .
3. What is the material of the surface to be tested? The third step is to know what the material of the coating is, whether it is magnetic, non-magnetic or conductive, which is beneficial for product selection.
4. Test parameters The fourth part is about the thickness of the test coating and whether the product can be measured. 5. The price of the product The fifth step is the customer's after-sales and price trend of the product. Through the above analysis, we not only know the function of the coating thickness gauge, but also roughly understand how to choose it. Regarding the application range of the coating, It is far more than just manufacturing, metal processing, chemical industry, commodity inspection and other testing fields. In our future world, its appearance represents a professional reform.
