INSPECTION is testing a measuring instrument, sensor, etc. against predefined specifications.
The specifications are drawn up according to the applicable requirements. The result of an inspection is a value judgment (approved or rejected).
An inspection relates to one or more aspects. For example, only measurement accuracy can be examined. The exact deviation is now of secondary importance. Only the judgment “too much deviation” or “good” is made. But if desired, the flowmeter can also be checked whether it is, for example, actually capable of measuring bi-directional.
Before a measuring instrument is put into use, it is inspected for the first time. Periodic reassessments usually follow.