Measuring method for surface coating of vacuum cup
Do you know how to measure the thickness of the surface of the cup? Have you ever tried the test and found that the film thickness gauge has been jumping between Fe and NFe? It is impossible to get data. Does this mean that it cannot be measured? Do you know why the instrument has been jumping?
To understand the cause of the problem mentioned above, first understand the internal structure of the vacuum flask. The vacuum flask is generally made of stainless steel and a vacuum layer. The top of the container has a cover and the seal is tight. The vacuum insulation layer can delay the heat dissipation of the liquid such as water inside to achieve the purpose of heat preservation.
Therefore, the vacuum cup is composed of the inner casing and the outer casing, and the paint film thickness gauge is to measure the surface coating thickness of the outer casing. In theory, as long as the outer casing is made of iron or non-ferrous materials, the thickness of the surface coating can be measured by the film thickness gauge. However, it is common for the instrument to switch between iron and non-ferrous, which means no data. This is because the instrument is tested with an automatic identification mode. The film thickness gauge is affected by the internal stainless steel layer and is identified as iron. The base has a non-ferrous matrix, and the instrument recognizes that it is non-ferrous. Therefore, under the interaction of the two substrates, the instrument will always jump between iron and non-iron, and the data cannot be output.
Therefore, to measure the thickness of the surface coating of the cup, the exact method of operation is this:
First set the film thickness gauge to an NFe (non-ferrous) measurement mode.
Then test the thickness of the coating of the cup, so that the thickness of the surface of the cup can be accurately measured to avoid the influence of the internal stainless steel.
The above is the correct method of testing the thickness of the coating on the surface of the cup. The non-ferrous based measurement mode is adjusted to ensure that the instrument is not affected by stainless steel and can be accurately tested. Therefore, the paint film thickness gauge is completely capable of testing the surface coating thickness of the vacuum flask.
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