When measurement traceability is a requirement, or is considered by the organization to be an essential part of providing confidence in the validity of measurement results, measuring equipment shall be:
a. calibrated or verified, or both, at specified intervals, or prior to use, against measurement standards traceable to international or national measurement standards; when no such standards exist, the basis used for calibration or verification shall be retained as documented information;
b. identified in order to determine their status;
c. safeguarded from adjustments, damage, or deterioration that would invalidate the calibration status and subsequent measurement results.
The organization shall establish, implement, and maintain a process for the recall of monitoring and measuring equipment requiring calibration or verification.
The organization shall maintain a register of the monitoring and measuring equipment. The register shall include the equipment type, unique identification, location, and the calibration or verification method, frequency, and acceptance criteria.
NOTE: Monitoring and measuring equipment can include, but are not limited to personally owned and customer supplied equipment used to provide evidence of product and service conformity.
Calibration or verification of monitoring and measuring equipment shall be carried out under suitable environmental conditions (see 7.1.4).
The organization shall determine if the validity of previous measurement results has been adversely affected when measuring equipment is found to be unfit for its intended purpose, and shall take appropriate action as necessary.