Metering and calibration
Measurement is an activity that achieves unity and accurate value. Or it is a measurement for the purpose of achieving unit uniformity and accurate and reliable magnitude. It involves the entire measurement field and provides guidance, supervision and assurance for measurement according to the law.

Basic requirements for calibration The basic requirements for calibration are as follows:
1) Environmental conditions: If the calibration is carried out in the laboratory, the environmental conditions should meet the temperature and humidity requirements of the laboratory. If the calibration is carried out on site, the environmental conditions shall be subject to the conditions for the on-site use of the instrument.

2) Instrument: As a standard instrument for calibration, the error limit should be 1/3~1/10 of the error limit of the calibration.

3) Personnel: Calibration is different from verification. The person performing calibration should be effectively evaluated and obtain the corresponding qualification certificate. Only the certificate holder can issue calibration certificate and calibration report, and only such certificate and report are recognized. of.

For example, pressure gauge calibration can be found in local metrology institutes or third-party calibration units, such as provincial and municipal metrology institutes or local third-party calibration agencies, etc., all must be approved by local metrology and national accreditation committees. CNAS certificate