Question Answer On how to confirm the testing instruments and equipment after getting the verification and calibration report

A. CNAS-CL01:2006 5.6.2.1.1 "When external calibration services are used, calibration services from laboratories capable of demonstrating qualification, measurement capability, and traceability shall be used to ensure measurement traceability. Calibration certificates issued by these laboratories shall have measurement results that include measurement uncertainty and/or conformity to a defined statement of metrological specification (see 5.10.4.2)." From the above requirements, it is clear that: firstly, the laboratory should select a qualified testing and calibration laboratory qualification. The calibration certificate issued by the calibration laboratory should have the authorization certificate number of the government-authorized statutory metrological institution. The calibration certificate issued by the calibration laboratory should have the laboratory accreditation mark CNAS. 5.6.2.1.1 Note 1: A calibration laboratory that meets the requirements of this guideline is considered qualified. A calibration certificate issued by a calibration laboratory accredited according to this guideline and bearing the logo of an accredited organization is sufficient proof of the traceability of the reported calibration data for the calibration in question. Secondly, look at the verification, calibration laboratory accreditation scope to help you test, calibration of the project in the verification, calibration laboratory capacity, if in no problem, if not in can not prove traceability. Third, look at the verification, calibration laboratory results in the report with what standard (device) for the calibration of your laboratory instruments and equipment, standardized device certificate number and expiration date. There is no measurement uncertainty given. Calibration laboratory to give qualified or unqualified, the laboratory can know from the calibration protocol error range, and then you can calculate the measurement uncertainty. Calibration laboratories only give calibration data and measurement uncertainty. Satisfy the needs of the laboratory by the laboratory to make their own judgment. Therefore, it is more necessary to confirm the laboratory itself.