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calibration

Chinese name: calibration
Alias: instrument calibration instrument detection
Definition 1: the values of the response of the instrument and shown its start signal or obtained by other methods and process of associated with the real data.
Definition 2: under prescribed conditions, in order to determine the value indicated by the measuring instrument or measuring system, or represented by a material measure or a reference material quantity, with the corresponding retrieval by the standard value of the relationship between a set of operations. Its purpose is determined by comparing with standard in value of the measurement device.

define
Calibration make accurate proofreading machine, instrument, etc. Under prescribed conditions, in order to determine the value indicated by the measuring instrument or measuring system, or represented by a material measure or a reference material quantity, with the corresponding retrieval by the standard value of the relationship between a set of operations. Calibration may include the following steps: inspection, rectification, reports, or through the adjustment to eliminate the comparative measurement device of any deviation in terms of accuracy.

The scope of instrument calibration
Class A equipment is refers to the guarantee of measurement, listed in the compulsory verification work measuring instruments and instruments of has A significant effect on product quality, etc. For class A devices should be strict management measures and the weekly inspection plan, test verification regulations must be strictly implemented, also wants when calibration cycle.
Class B equipment is common, there is a requirement for accuracy, the quality of our products have clear influence equipment, etc. Such instruments and equipment calibration cycle in principle should not exceed the longest period prescribed in the verification regulation, such as job need can be appropriately reduced to its verification program or as part of the test, only can use the calibration, after assessment can prolong the calibration cycle.
Class C equipment refers to the state regulations for one-time verification and national no requirements of instruments and equipment, etc. To this kind of equipment can be put into use after inbound acceptance verification, in use process function. Especially attached to the equipment of the instrument.

Segmentation:
And can be divided into: radio instruments, electromagnetic instrument, the time and frequency instrument, the length of the instrument, mechanical equipment, thermal and physical and chemical equipment

Calibration of the basic requirements
Calibration should satisfy the basic requirement of the following:
(1) calibration environmental conditions such as in check (calibration) chamber, and the environmental conditions shall meet the requirements of the laboratory of temperature, humidity, etc. Such as in the field of calibration, environmental conditions can meet the conditions of the instrument field use shall prevail.
(2) the instrument as a calibration standard instrument the error limits should be timing error limits of 1/3 ~ 1/10.
(3) personnel are different from the verification of calibration, calibration but people should also be tested and approved by the effective, and obtain the corresponding certificate of quality, only licensed personnel may issue the calibration certificates and calibration reports, also only the certificates and reports are considered to be effective.