Let me explain:
First of all, the word correction is a term used in Chinese-speaking areas such as Hong Kong and Taiwan. It does not exist in the professional metrology terminology in mainland my country. It roughly corresponds to the term "calibration" in the metrology terminology. Calibration and verification (there is no word verification in international metrology terminology).
External calibration means outsourcing calibration; internal calibration can be internal calibration or internal verification.
So, what is verification? Very simply, it includes the three terms of verification, calibration, and testing.
Among them, verification, especially calibration, is for measuring instruments, that is, for instruments that can give quantitative values. However, there are many equipment that cannot give quantitative values, or verification and calibration If the value has no actual meaning, such as aging test chambers, tools and fixtures, etc., then it is not appropriate for you to use verification or calibration, because such equipment will not produce a value for you after use, and it cannot be used. If the results produced by it are verified or calibrated, then a more comprehensive term is needed, which is calibration!
I won’t go into details about the difference between verification and calibration. There is no word verification in the world. This is a specific legal term in our country, specifically referring to those authorized measurement institutions or measuring instrument production units. , a process of transmitting values ??in accordance with legal metrological verification procedures, or a comprehensive evaluation process of the legality of measuring instruments!
The above is to popularize knowledge, and I will answer your questions below:
As for the "highest measurement standard for enterprises" you mentioned, although your statement is not accurate, I still follow the professional To explain the terminology, listen:
The term "the highest measurement standard of an enterprise" refers to the highest measurement standard within the scope of measurement administration where the enterprise is located.
For example, if you are a certain company in Guangdong, that is The Guangdong Institute of Metrology is not as high as you; if you are a certain company in Guangzhou, the Guangzhou Institute of Metrology is not as high as you. There are also some traditional state-owned enterprises that are not affiliated with the local area. Their measurement supervisory units may be PetroChina, China Electric Power, Metallurgy etc. Industry Institute of Metrology...
So the highest measurement standard of an enterprise cannot be understood as your enterprise’s measurement standard. If your measurement standard can be used by the higher-level measurement unit If it is verified or calibrated, then yours cannot be called the highest measurement standard of the enterprise!
Regarding the understanding of the "Compulsory Inspection Catalog", it does not mean that all instruments included in the Compulsory Inspection Catalog must be compulsorily calibrated. There is a premise here, which is that they must be used in the four categories of use occasions stipulated in the Measurement Law: Trade settlement , safety protection, medical and health, environmental monitoring; if it is not used in these four types of occasions, it cannot be applied to compulsory verification even if it is in the catalog. The core of the mandatory test is: fixed time and fixed point!
Scheduled means stipulating a time to submit for inspection, and fixed-point means stipulating that the unit to be submitted for inspection must be the superior of its supervisor and cannot be skipped!
In addition to compulsory inspections, there are also non-compulsory inspections, which cannot be enforced at a fixed time. For example, measuring instrument manufacturing companies produce measuring instruments based entirely on market demand and leave the factory. You cannot set the time because you don’t know. There will be orders for production and shipment at some point!
Understand the explanations of the above terms, then your questions will be easily solved!