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Difference between calibration and verification

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the difference between calibration and verification:

1. Different purposes

calibration: the purpose of calibration is to evaluate the indication error of the measuring device according to the measurement standard and ensure the accuracy of the measurement value. It belongs to a group of operations from bottom to top

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verification: the purpose of verification is to make a mandatory and comprehensive evaluation of the measuring device. This comprehensive evaluation belongs to the category of unity of quantity and value, and is a top-down quantity and value transmission process

2. Different objects

calibration: the calibration object is a measuring device other than mandatory verification. China’s non compulsory verification measuring devices mainly refer to the measuring instruments widely used in the process of production and service provision, including the measuring instruments used in incoming inspection, process inspection and final product inspection

verification: the object of verification is the measuring device subject to compulsory verification specified in China’s measurement Law

3. Different natures

calibration: calibration is not mandatory and belongs to the voluntary traceability behavior of the organization. This is a technical activity, which can evaluate the indication error of measuring instruments and set the value for measuring instruments or reference materials according to the actual needs of the organization. The organization can specify calibration specifications or calibration methods according to actual needs. The calibration cycle, calibration identification and records shall be specified by itself

verification: verification is a compulsory law enforcement act and belongs to the scope of legal measurement management. The verification regulation, agreement period, etc. shall be carried out in accordance with the legal requirements

4. Calibration according to different

: the main basis of calibration is the calibration specification formulated by the organization according to the actual needs, or refer to the requirements of the verification regulation

verification: the main basis of verification is the regulation of measurement verification, which is the legal technical document that must be observed in the verification of measurement equipment

5. Different methods

calibration: the calibration can be conducted by organizing self calibration, external calibration, or a combination of self calibration and external calibration. If the organization has the conditions, it can use the self calibration method to calibrate the measuring instruments, so as to save large expenses

verification: the verification must be carried out in a qualified measurement department or a legally authorized unit. According to China’s current situation, verification belongs to legal authorization, and it is difficult for non-state organs or relevant departments to obtain authorization, even if the technical strength is sufficient

reference source: Baidu Encyclopedia – Calibration

reference source: Baidu Encyclopedia – Verification

the main differences between calibration and verification are as follows:
(1) different purposes
the purpose of calibration is to evaluate the indication error of the measuring device according to the measurement standard and ensure the accuracy of the measurement value. It belongs to a group of operations from bottom to top
the purpose of verification is to make a mandatory and comprehensive evaluation of the measuring device. This comprehensive evaluation belongs to the category of unity of quantity and value, and is a top-down quantity and value transmission process
(2) different objects
the calibrated object is a measuring device other than mandatory verification
the object of verification is the measuring device subject to compulsory verification specified in China’s measurement Law
(3) different natures
calibration is not mandatory and belongs to the voluntary traceability behavior of the organization
verification is a compulsory law enforcement act and belongs to the scope of legal measurement management
(4) according to different
the main basis of calibration is the calibration specification formulated by the organization according to the actual needs, or refer to the requirements of the verification regulation
the verification is mainly based on the metrological verification regulation, which is a legal technical document that must be observed in the verification of measuring equipment
(5) different methods
calibration can be conducted by organizing self calibration, external calibration, or a combination of self calibration and external calibration
the verification must be carried out in a qualified measurement department or a legally authorized unit
(6) different periods
the calibration period is determined by the organization according to the needs of using measuring instruments
the verification cycle must be carried out according to the provisions of the verification regulation, and the organization cannot determine it by itself
(7) different contents
the calibration contents and items only evaluate the indication error of the measuring device to ensure the accuracy of the measurement value
in addition to the calibration items, the calibration items need to be more comprehensive
(8) different conclusions
the calibration conclusion is only to evaluate the measurement value error of the measuring device to ensure the accuracy of the measurement value, and it is not required to give a qualified or unqualified judgment
for verification, only the qualified and unqualified judgment of the measuring device must be given according to the measurement value error range specified in the verification regulation
(9) different legal effects
the calibration certificate is applicable to each country that has joined the mutual recognition agreement and is generally used internationally
the verification certificate is only used in China, and some foreign audits do not recognize the verification certificate.

difference between calibration and verification:

1 Different natures

calibration is not mandatory and belongs to the voluntary traceability behavior of the organization

verification is a mandatory law enforcement behavior and belongs to the scope of legal measurement management

2 Different objects

the calibration object is the measuring device that belongs to the compulsory verification other than the compulsory verification

the verification object is the measuring device that is subject to the compulsory verification specified in China’s measurement Law (the compulsory verification is implemented for those used in trade settlement, safety protection, medical and health and environmental monitoring in the annex to the verification management measures of the people’s Republic of China for compulsory verification of working measuring instruments)

3 Different purposes

calibration belongs to bottom-up measurement value traceability

verification is to evaluate whether the measuring instruments meet the specified requirements, and it is a top-down measurement value transmission process

4 Different ways

calibration can be carried out by organizing self calibration, external calibration, or a combination of self calibration and external calibration

verification must be carried out in a qualified measurement department or a legally authorized unit

calibration cycle shall be determined by the organization according to the needs of using measuring instruments

verification cycle must be carried out in accordance with the provisions of verification regulations

5 Calibration according to different

: the main basis of calibration is the calibration specification formulated by the organization according to the actual needs, or refer to the requirements of the verification regulation

verification: the main basis of verification is the regulation of measurement verification, which is the legal technical document that must be observed in the verification of measurement equipment

6. Conclusion the conclusion of different

calibration is only to evaluate the measurement value error of the measuring device and ensure the accuracy of the measurement value. It is not required to give a qualified or unqualified judgment

verification must give the qualified and unqualified measurement device according to the measurement value error range specified in the verification regulation. National laboratories in

countries generally calibrate according to the verification regulation, so we can think that the calibration /verification is based on the verification regulation, Only the calibration is mainly aimed at the accuracy part, while the verification is a comprehensive evaluation, but many of them give the final results

main difference between calibration and verification

purpose:
calibration – determine whether the measurement value of the monitoring and measuring device is accurate. It is a bottom-up quantity value traceability to evaluate the indication error
verification – mandatory and comprehensive evaluation of measurement characteristics. The quantity values are unified, and whether the verification meets the specified requirements. It belongs to the quantity value transmission from top to bottom
Object:
calibration – measuring instruments and measuring devices other than compulsory verification
verification – national compulsory verification: metrological benchmark; Measurement standard; There are 59 types of work measurement for trade settlement, safety protection, medical and health care and environmental monitoring
basis:
calibration – calibration specifications or calibration methods can be unified by the state or formulated by the organization itself
verification – Verification Regulations uniformly formulated by the metrological department authorized by the state
nature:
calibration – it is not mandatory and is a voluntary traceability behavior of the organization
verification – it is mandatory and belongs to the scope of legal measurement management
cycle:
calibration – it is determined by the organization according to the use needs. It can be carried out regularly, irregularly or before use
verification – implemented according to the mandatory verification cycle stipulated by Chinese law
method:
calibration – self calibration, external calibration or a combination of self calibration and external calibration
verification – it can only be carried out in the specified verification department or legally authorized qualified organization
content:
calibration – Evaluation of indication error
verification – comprehensively evaluate the measurement characteristics, including the error of the evaluated quantity value
conclusion:
calibration – it does not determine whether it is qualified, but only evaluates the indication error Issue calibration certificate or calibration report
verification – determine whether it is qualified or unqualified according to the error range of quantity value specified in the verification regulation Issue verification certificate
legal effect:
calibration – the calibration conclusion is a technical document without legal effect
verification – the verification conclusion is a document with legal effect and serves as the legal basis for the verification of measuring instruments or measuring devices.

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