What is a calibration standard?

Most measurement instrumentation will be built to a national or international standard – for example, BS EN 61672-1 defines the characteristics of sound level meters. A ‘calibration standard’ will define how that instrument is calibrated, so in this case, BS EN 61672-3 documents the procedures for calibration. Very often, calibration standards don’t exist for some types of instruments, so laboratories will perform a series of tests, using their own procedures, to check conformance with the instrument standard.

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