How to determine the measuring instruments calibration cycle

Please first determine is that you want to determine the measuring instruments are calibration, calibration, or testing, 3 states can be used to determine the cycle of measuring instruments. Certificate of verification and calibration reports need to have a certain measurement of qualifications can be issued, the test report is generally issued by the production company. Validation certificates are divided into two kinds of testing and inspection, are based on the validity of the certificate you obtained to prepare the date of validity of the certificate (generally 1 year, there are 6 months or 2 years of compulsory inspection), calibration reports are generally not valid need to confirm the validity of the date of your own (generally 1 year, you can also be appropriate to extend for 2 years), the test report is the company's own internal issued by the implementation of the company's internal standards, according to the company's own standards to determine the Validity period (generally up to 3 years, there is no cycle or one-time cycle)