2, or according to the requirements of the purpose of measurement calibration? Yes, can be divided into the following cases: 1) the state requires mandatory calibration (divided into four categories: for trade settlement, safety and security, medical and health, environmental monitoring) measuring instruments, regardless of whether you think it is important or not, need to be sent to the inspection. 2) Because of various types of system certification requirements for product quality control, so where product quality is concerned with measuring instruments or monitoring and measuring devices also need to be sent to the inspection, otherwise the certification of the external Audit may be troublesome to send too much will increase the burden on enterprises, labor and material resources, send more or less need to combine with the actual situation of their own control.
3, do not need to be strictly measured do not need to do? If it does not involve mandatory calibration, product quality control, just as a general test with the instrumentation can not be sent for inspection.
4, if a certain type of instrumentation needs to be sent to a larger number, you can consider building a standard, the implementation of the enterprise internal calibration or calibration, in order to save the cost of calibration
Bumped into the questioner who does not understand that the answer is also a waste of effort ！！！！