What is a key requirement for the identification of a calibration certificate?

A key requirement for the identification of a calibration certificate is that it must be unique. This uniqueness ensures that each calibration certificate can be distinctly identified and referenced, which is crucial for traceability and accountability in calibration processes. Unique identifiers help to prevent confusion and errors, allowing any party to accurately verify and reference a specific calibration event.

While clarity of understanding, inclusion of calibration dates, and being in digital format can be important aspects of calibration certificates, they do not fulfill the primary requirement that ensures the document serves its purpose in record-keeping and verification. Uniqueness is vital for regulatory compliance and maintaining the integrity of calibration records across systems and institutions.