Primary calibration
Primary calibration is another form of state metrological control and supervision in EAEU, along with the Pattern Approval Certification. Approved measuring instruments should be calibrated to confirm the compliance of their indicators with the established metrological requirements. During calibration, errors are determined, the values of which should not exceed the permissible limits specified in the description of the type of a specific measuring instrument and its operational documentation. Calibration is regulated by article 13 of the Federal Law of the EEU No. 102 “On ensuring the unity of measurements”.
WR Group conducts primary calibration of certified measuring instruments. WR Group organizes the visit of accredited experts for calibration to any place, depending on the possibility of transporting the verified measuring instruments and economic factors. The results measuring instruments calibration are authenticated by a verification mark and/or a calibration certificate.
Certified measuring instruments must be primary calibrated prior to the commissioning and after repairs. The availability of a Pattern Approval Certificate is a prerequisite for the primary calibration. Results of the primary calibration are registered in the Federal Register and entered in the operation manual or technical data sheet of the device. During operation, measuring instruments are subject to periodic verification. The time interval between such verification is determined and approved during the type testing and is specified in the Pattern Approval Certificate and in the method of verification.
Verification can be extraordinary if the calibration mark or seal on the measuring instrument was damaged during the operation. Also, an extraordinary verification is required after re-adjustment of the measuring instrument or putting the measuring instrument into operation after long-term storage.
Only accredited verification bodies in the EEU are entitled to carry out primary calibration.
WR Group calibrates measuring instruments in accordance with the state verification scheme procedure and relevant method of verification established when approving the type of measuring instrument.
By means of primary, periodic or extraordinary calibration we will determine the accuracy of measuring instruments and confirm their conformity with metrological requirements.