Calibration is always necessary when checking equipment (Balance or test weight) is to be used in a QM process (e.g. nach ISO 9000ff, TS 16949, VDA 6.1, FDA, GLP, GMP, …).
It determines the accuracy of the balance according to DIN EN ISO / IEC 17025. It has international recognition. The application of the standard is checked by certain organizations (EA = European co-operation for Accreditation, DAkkS = Deutsche AkkreditierungsStelle GmbH, …).
The user himself determines the frequency of this operation (1 to 2 years in general).
Verification is an operation imposed by the legislator. It is necessary in the following cases:
- in commercial trade when the price of a commodity is determined by weighing
- the manufacture of pharmaceuticals in pharmacies
- for official purpose
- the production of pre-packaged goods
- in medical applications
It is only possible with a certain type of scale (homologable). The frequency is determined by the legislator. The first approval can be carried out by the manufacturer.