NMI examines or assesses a sample instrument and if it complies with our specifications we issue a certificates of approval to certify that the pattern (design) of the instrument is suitable for use for trade or as a legal measuring instrument. Certificates of approval are usually comprised of three sections: a certificate which consists of the advice and conditions of approval, a technical schedule which describes the pattern and any variants, and a test procedure which specifies the tests for verification and the maximum permissible errors.
To find a particular certificate of approval (commonly referred to as a pattern approval certificate):
- use the Search facility (top right); or
- select the correct approval category (left) and sub-category (where certificates are listed in numerical order)
Notes
- (Interim Certificate) in the title means that the certificate is only valid for a limited period
- (CANCELLED) or (EXPIRED) after the title means that the certificate is not valid for new instruments, however always double-check certificates to check their validity
-
we issue a new certificate and technical schedule
for each variant we approve