Daily fault factors and solutions for coating thickness gauges
Daily fault factors and solutions for coating thickness gauges
The coating thickness gauge can non-destructive measure the thickness of non-magnetic coatings on magnetic metal substrates (such as steel, iron, alloys, and hard magnetic steel) (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) and the thickness of non-conductive coatings on non-magnetic metal substrates (such as copper, aluminum, zinc, tin, etc.) (such as enamel, rubber, paint, plastic, etc.). So, what are the common faults of coating thickness gauges? How should we solve it? Below, Zhuhai Tianchuang Instrument Company has summarized the following points for everyone:
1. Inaccurate instrument measurement
① Please first calibrate the instrument in the system, calibrate it to fit the error range. The error should follow ≤ 3% (thickness value). If further testing is required, please stop the system calibration on the lubricating bare substrate (unpainted substrate) of the tested workpiece.
② Please check if the front end of the probe is worn, deformed, and if there are any attached substances. Also, if the outer sheath of the probe is not in good condition, it can be corrected by sanding it properly and disposed of cleanly
③ The surface roughness of the substrate of the test piece can cause systematic and occasional errors. When measuring, increase the number of measurements at different positions to restrain occasional errors. Or use sandpaper to polish the substrate and recalibrate the instrument zero point.
④ Measurement techniques and placement of probes, during testing, it is necessary to ensure that the probe is perpendicular to the sample
⑤ Measure the curvature of the test piece and recalibrate it within the radius of curvature that the probe conforms to. Special attention should be paid to the stable placement of the V-shaped slot of the probe on the convex surface of the pipeline.
2. The instrument does not turn on
① Please check and confirm if the battery is charged, or replace it with a new one.
② Please check if the battery has good contact and the electrode plates are not oxidized or rusted (if rusted, tools can be used to scrape off the oxide layer)
③ Please check if the buttons can be pressed in place and if they are elastic.
④ Other host circuit problems, consult the company's after-sales service or return to the factory for maintenance
3. Measurement without data changes
① Can the probe be well connected or damaged
② Related host circuit faults
4. The instrument cannot measure
① Check if the probe is properly connected and inserted properly
② Check if there is a broken center in the probe wire, and focus on checking the probe connector (the connector can be turned on with a knob to check)
③ Frequent and extensive use of probes, aging or damage of sensors, burns, etc
