Analyses and Suggestions on Proficiency Testing For Ball Pressure Test Techniques
Ball pressure test is an important method to test the heat resistance of external parts made of non-metallic materials in electrical and electronic products, insulating material parts used to support live parts (including connections) and thermoplastic material parts that provide additional insulation or enhanced insulation, and is also one of the required items for national supervision and sampling of related product quality. According to the Proficiency Testing scheme and measurement audit implemented by us, combined with GB/T 5169.21-2017, we makes technical analysis and suggestions for three links that may lead to deviation of test results, including instrument inspection, test setting and indentation edge identification before the test in this paper. The effects of pixel correction and light source type on the test results when the d is measured by an image measuring instrument are analyzed.
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