Is there a **specified mandatory replacement period** for primary meters and secondary meters on-site?
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My friends, are there any **specified mandatory replacement or retirement periods** for primary and secondary meters used in industrial production measurement? Or industry standards? Thank you all. Is there any analysis on the failure rates of primary meters and secondary meters based on their length of use? Thank you
Regular field instruments are not available, but those for flammable and toxic gases are available, with a typical lifespan of 2 to 3 years.
I remember there were rules stating that certain obsolete products that do not meet safety requirements or have not been upgraded in terms of automation technology are not allowed to be used anymore.
There is no fixed regulation regarding the time for retirement; generally, measuring instruments need to be calibrated
There seem to be no regulations either; measuring instruments must be inspected or calibrated according to their specified inspection cycles, and those that fail the inspection cannot be used...
Masuring instruments are regularly calibrated according to their grade!
It only specifies the periodic inspection schedule; it seems that a device is scrapped only when it cannot be repaired
There are no regulations requiring that measuring instruments be tested or calibrated according to a specified cycle; those that fail such tests cannot be used
This post was last edited by cqdfwy on 2016-12-9 at 11:30. Personal opinion: In actual use, the conditions under which instruments are operated vary greatly; different operating environments have varying effects on the technical performance and lifespan of these instruments, and different applications impose different requirements on their performance. Moreover, the quality of instruments from different manufacturers and of different types also varies (even if they comply with the same standards, there can still be differences in quality). Therefore, it is impossible to establish a fixed service life for such instruments.