How to Use a Paint Thickness Gauge?
2 Answers
Paint thickness gauge usage method: 1. Before measurement, remove any attached substances on the surface, but do not remove any coating material; 2. Do not measure near abrupt changes in the test piece, such as edges, holes, and inner corners, and do not measure on curved surfaces of the test piece; 3. Since each reading of the instrument is not exactly the same, it is necessary to take several readings within each measurement area; 4. Local variations in coating thickness also require multiple measurements in any given area, especially when the surface is rough. The probe located on the surface of the component generates a closed magnetic circuit. As the distance between the probe and the ferromagnetic material changes, this magnetic circuit will change to varying degrees, causing changes in magnetic resistance and the inductance of the probe coil. Using this principle, the distance between the probe and the ferromagnetic material, i.e., the coating thickness, can be accurately measured.
When I first started using a paint thickness gauge, I found it quite easy to use. First, turn on the device and make sure the battery is sufficiently charged. Then, find a clean and dry surface for calibration testing, such as a metal block or standard plate, ensuring the reading is zero. Gently place the probe on the car paint without applying pressure, letting it adhere automatically. The screen will display the thickness value in microns. Measure multiple areas like the hood, doors, and trunk to check for uniformity. If the readings fluctuate significantly, it might indicate uneven paint or signs of accident repairs. I usually use it to inspect used cars or the results after repainting, avoiding purchasing accident-damaged cars or rework. Remember to keep the probe clean and avoid using it on wet or greasy surfaces. It's simple to operate, and you can learn it in just two minutes.
