Determine testing items and standards: determine the parameters and indicators to be tested, as well as the corresponding testing standards and methods.
Selection of testing equipment and tools: According to testing items and standards, select appropriate testing equipment and tools to ensure their accuracy and reliability meet the requirements.
Carry out inspection operation: according to inspection standards and requirements, use inspection equipment and tools to carry out actual operation and record inspection data and results.
Data processing and analysis: process and analyze the test data, including data sorting, statistics, calculation and comparison, and draw test conclusions and evaluation results.
Compile test report: according to the test conclusion and evaluation result, compile test report, including test purpose, test items, test methods, test results, conclusions and suggestions.
It should be noted that the measurement and testing process should follow the principles of science, standardization, accuracy and fairness to ensure the accuracy and reliability of the test results. At the same time, attention should be paid to safety and environmental protection in the detection process to avoid adverse effects on people and the environment.
The methods of metrological testing include metrological verification and metrological calibration. Metrological verification is a comprehensive evaluation of the metrological performance of measuring instruments, including inspection, labeling and/or issuance of verification certificates; Measurement calibration is to evaluate the indication error of measuring device according to measurement standards to ensure the accuracy of the value, which belongs to the value transfer process. These two forms are realized by means of entrusted testing or on-site testing, which are essentially the process of realizing value transfer between legal testing departments and measurement authorized units.
In the specific implementation of metrological testing, different testing methods and technologies need to be selected according to different testing objects and parameters. For example, length measurement can be calibrated by laser interferometer, optical comparator and other equipment; For temperature measurement, standard temperature source, thermometer comparator and other equipment can be used for calibration; For pressure measurement, standard pressure source, pressure gauge comparator and other equipment can be used for calibration; For current and voltage measurement, standard current source, standard voltage source, ammeter and voltmeter comparator can be used for calibration.
In a word, metrological testing is a scientific, standardized, accurate and fair process, and it is necessary to follow certain steps and methods, select appropriate testing equipment and tools, and ensure the accuracy and reliability of testing results.