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How to confirm the calibration certificate

Confirmation of calibration certificate:

1. Instrument calibration, whether the signatures of the relevant certifiers, reviewers, and authorized signatories of the calibration certificate are complete, and whether there are CNAS-related stamps and calibration units Chapter;

2. If feasible, it is also necessary to confirm whether the uncertainty of the instrument and equipment verification and calibration meets the requirements;

3. Whether the standard materials used for verification and calibration are within the validity period of verification and calibration .

Measurement calibration certificate is the form in which the measurement unit expresses the parameters of the measuring instrument.

The certificate and test report at least include the following information:

1. Certificate and report name , for example: the words "Calibration Certificate";

2. Laboratory name and mailing address;

3. The unique number, page number and total number of pages of the certificate and report, There is a clear end mark;

4. Name and address of the client;

5. Description, status and clear identification of the sample;

6. Sample Date of receipt, date of calibration/testing;

7. Basis and method of calibration/testing (technical specifications and document code);

8. Standard device used for calibration/testing Traceability, such as: calibration certificate number and validity period of the standard instrument, etc.;

9. Environmental conditions for calibration/testing, such as: temperature, humidity, etc.;

10. Calibration/ Testing location;

11. For items that allow exceptions to deviate from standards and procedures, the deviation content should be noted in the calibration/test results column;

12. Verification and calibration of report results , the signatures of the testing personnel, verification personnel and the authorized signatory who issued the certificate/report;

13. The calibration results given in the calibration certificate should include the measurement uncertainty;

14 .When applicable and necessary, the certificate/report can provide opinions and explanations;

15. A statement that it is only valid for samples and that the certificate and report may not be partially copied without approval.