Scales used in trade

 

The type-approval of a measuring instrument is subject to a type-examination by an approved inspection body to ensure that the instrument’s properties and construction comply with the legal requirements.

 

In the initial verification, the measuring instrument is inspected to ensure that it conforms with the approved type, functions accurately, and the margin of error does not exceed the permitted limits.

 

The periodic verification involves a post-introduction inspection at regular intervals to ensure that an in-service instrument is functioning reliably.