Laboratory services – How often should I check metering devices?

Applicable regulations (Act on Measures, PN-E 04700:1998 standard) require all instruments used for safety / electric shock measurements to have certificates confirming their technical efficiency. However, these regulations do not specify in details a document or its validity.
PN-ISO 10012-1 standard, Annex A provides, among others, that the manufacturer of a device may recommend the interval of metrological inspection for its instruments.

Therefore it is necessary to observe internal rules or standards, if they specifically state the manner of the metrological control of equipment used in a given place (especially in case of having ISO quality control system); otherwise you can rely on the manufacturer’s recommendations (see the manual of the instrument).

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