First of all, the difference between the calibration certificate and the calibration certificate, the calibration certificate is usually a mandatory inspection of the instrument testing activities, it is a value transfer process, generally only when the enterprise's instrumentation, is a mandatory inspection of the instrument, only need to carry out the calibration of the certificate issued by the calibration. Validation is mandatory, as long as it is a mandatory instrument, must only do the validation, can not be calibrated. But the verification at the same time can also be carried out on non-mandatory instrument, can do calibration of the instrument can also do verification, but itself to do verification of the instrument can not go to do calibration.
And the calibration certificate, is for non-strong inspection instrument all equipment can be carried out testing work. Calibration is a kind of quantitative value traceability activities, if the verification of the quantitative value transfer from the top to the bottom of the transfer standard, then calibration traceability is from the bottom to the top of the traceability process. Calibration certificate issued by the calibration will not indicate whether the instrument is qualified or unqualified, but will give the specific indicators of instrumentation data, there will be a thick stack of documents, calibration certificates are not only documents, but also data files, compared to the calibration certificate is just a piece of paper, indicating that the instrument is qualified or unqualified, the instrumentation data does not make a detailed description.
Enterprises want to see what kind of certificate they need, the first thing to do is to do the instrument categorization, non-compulsory inspection of the instrument to do calibration, compulsory inspection of the instrument and then go to do the verification. This can also save themselves a sum of money, because the general cost and time of calibration is higher than calibration, if the instrument all do calibration, not only higher costs, and a very long time period, so the specific classification to do very necessary.
It is important to note here that only authoritative organizations can issue calibration certificates, calibration is a third-party organizations can do. Need to do the calibration of the instrument can find the local metrology institute or metrological institute to deal with, while the calibration of the instrument because the choice of a third-party calibration organization, so the alternative institutions will be more, they have to pick the right from.
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