Instrument self-test refers to the use of instrumentation units or individuals, in accordance with certain methods and cycles, the performance and accuracy of the instrumentation to check and evaluate the process. The purpose of self-test is to ensure the reliability and accuracy of the instruments and prevent the quality of production, scientific research, testing and other work from being affected by the failure or error of the instruments and meters. The methods and standards of self-inspection should be determined according to the type, use, requirements and other factors of the instrumentation, generally including visual inspection, functional inspection, precision inspection, etc. The results of self-inspection should be recorded in the instrumentation manual. The results of self-inspection should be recorded in the self-inspection record sheet of the instrumentation, and the problems found should be dealt with in time.
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