Legal Metrology Act, 2014 (Act No. 9 of 2014)RegulationsLegal Metrology Regulations, 2017Part III : Measurement Standards6. General requirements |
| (1) | The prescribed requirements for the measurement standards referred to in section 19 of the Act used by the personnel employed by the National Regulator or any appointed service provider, designated verification and repair bodies are indicated in the relevant technical regulations or a relevant SANS document. |
| (2) | All measurement standards shall be traceable to the national standard or in the absence of such national standard to an international standard acceptable to the National Regulator. Unless otherwise specified in this part of the regulations, measurement standards shall comply with requirements set by the National Regulator for that measurement standard and be calibrated at least every 12 months and a calibration certificate, issued by an accredited calibration laboratory, will be proof of traceability. |
| (3) | Unless otherwise specified in this part of the regulations, the expanded uncertainty, U (for coverage factor k = 2), for the measurement standard (including its indicating device), shall be less than 1/5 of the applicable maximum permissible error of the measuring system under test for type approval and shall be less than a 1/3 of the applicable maximum permissible error of the measuring system under test for initial or subsequent verification. |
| (4) | Unless otherwise specified in this part of the regulations, reference materials used as measurement standards in testing and verification shall be traceable to the national standard or in the absence of a national standard to an international standard acceptable to the National Regulator. A calibration certificate, issued by an accredited calibration laboratory or equivalent for the equipment used to determine the value of the reference materials will be proof of traceability. |
| (5) | Instruments used for auxiliary measurements during repair or verification of measuring instruments shall be accurate to ensure that, in the test results, no error of more than 1/10 of the smallest applicable tolerance of the measuring instrument being repaired or verified will be caused. |