Basic requirements and similarities of instrument calibration verification

At present, whether in the laboratory or in specific experimental activities, the requirements of the instrument are getting higher and higher. However, the simple requirement for the accuracy of the instrument is one aspect. In the process of experimentation, how to correctly test the experiment? It is still important for the instrument to perform calibration and verification. SooKoo.com will introduce the calibration and verification requirements and differences of the instrument:

The first is the calibration of the instrument. In general, the instrument calibration should meet the following basic requirements:

1) Environmental conditions: Environmental conditions are also an important condition affecting the calibration of the instrument. If the calibration of the instrument is performed in the verification (calibration) room, the environmental conditions should meet the requirements of the laboratory for temperature and humidity. If the calibration is performed in the field, the environmental conditions are based on the conditions that can be met on the instrument's site.

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

3) Personnel: Although the calibration is different from the verification, the personnel performing the calibration should also be subject to an effective assessment and obtain a corresponding certificate of compliance. Only certificate holders are required to issue calibration certificates and calibration reports, only such certificates and reports. Think it is effective.

Instrument calibration and instrument verification are different. What are the similarities and differences between them?

Calibration and verification are two different concepts, but there is a close relationship between the two. Calibration is generally performed by comparing a measurement instrument (called a standard instrument) with a higher accuracy than the one being calibrated to a calibrated measurement instrument to determine the indication error of the instrument being calibrated, sometimes including part of the measurement performance, but often The calibrated measuring instrument only needs to determine the indication error. If the calibration is the verification content of the indication error in the verification work, it can be said to be part of the verification work, but the calibration cannot be regarded as verification, and the calibration also has less requirements on the conditions. The verification is so strict that the calibration work can be performed at the production site, and the verification must be performed in the verification room.

In the experiment, some people will understand the calibration as the process of adjusting the measuring instrument to the specified error range, which is not enough. A part of the calibration process during adjustment can be adjusted during calibration of the instrument, but the adjustment does not equal the calibration.