The purpose of calibration:
1, to determine the error of the displayed value, to determine whether it is within the expected tolerance range;
2, to derive the reported value of the deviation from the nominal value, and high-precision measuring instruments to correct the displayed value;
3, to the scale markers to assign a value or to determine the other characteristics, or to give the characteristics of the reference material to assign a value;
4, to achieve the traceability.
Expanded information:
The basic requirements that should be met by calibration are as follows:
1. Environmental conditions If calibration is carried out in a laboratory, the environmental conditions should be such as to meet the requirements in the test protocol/calibration specification. If the calibration is carried out in the laboratory, the environmental conditions shall meet the temperature, humidity and other regulations required in the calibration protocol/calibration specification. If the calibration is carried out in the field, the environmental conditions shall be subject to the conditions that can satisfy the field use of the instrument.
2. Instrument The error limit of the standard instrument used for calibration should be 1/3~1/10 of the error limit of the calibrated meter.
3. Personnel The personnel performing the calibration should be validly assessed and obtain the corresponding certificate of competency, and only the certified personnel can issue calibration certificates and calibration reports, and only such certificates and reports are regarded as valid.