Measuring equipment must be checked regularly, if the quality of the measurement results has changed during every-day use. The user should perform these checks at fixed time intervals. Balances and Scales are tested with an external weight piece. This test weight must have a valid calibration certificate issued by an accredited calibration lab. The tests should be performed in fixed, regular intervals and the results should be documented in a traceable way.
By Mettler - Toledo Int. Inc based in Greifensee, SWITZERLAND.
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