What is the sampling rate for calibration of thermocouples purchased from manufacturers upon their arrival at the factory?
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What is the sampling rate for calibration of thermocouples purchased from manufacturers upon their arrival at the factory? Are there **any regulations**?
Instruments used for handling materials that are subject to high temperatures, low temperatures, high pressures, or are flammable, explosive, toxic, or harmful must all be calibrated; some of them require external calibration, while for other instruments, a sample of 30% needs to be inspected. Refer to the national standard 50093-2013.
Generally, a 30% sample inspection is carried out, but if it is used at critical measurement points, full inspection is required, such as in applications involving adjustment or interlocking