at present, in many places, the use of four-in-one gas detector is indispensable. it can be mainly applied to routine detection of 4 kinds of gases, namely: combustible gas EX, carbon monoxide CO, Detection of hydrogen sulfide H2S, oxygen O2 4 gases. However, in the verification procedures of this 4 gas detector, there are requirements for the verification period, otherwise, if the relevant verification is not done well, it may have a certain impact on the use. So do you know what the four-in-one gas detector requires for the verification cycle? The following is a brief introduction by yi yun Tian:

4-in -1 gas detector verification cycle requirements, as follows:

1. Combustible Gas Ex

GB basis: JJG 639-2011 verification regulation for combustible gas detection alarm

verification cycle: the calibration cycle of the instrument is generally not more than 1 year

2, H2S

GB basis: JJG 695-2019 verification regulation of hydrogen sulfide gas detector

verification period: the calibration cycle of the instrument is generally not more than 1 year

3, oxygen O2

GB basis: JJG 365-2008 verification regulation of electrochemical oxygen analyzer

verification period: the calibration cycle of the instrument is generally 1 year

4, CO

GB basis: JJG 915-2008 carbon monoxide detection alarm verification procedures

verification period: the verification period of the instrument is 1 year

In summary, we can see that, for carbon monoxide, oxygen, hydrogen sulfide, combustible gas in any 1 or more gas detection instruments in the subsequent use of the process is required to at least once a year to carry out a re-measurement verification, so at the same time to detect the four gases of the four-in-one gas detector is also required to carry out regular measurement verification.Under normal circumstances, the metrological verification should be carried out again at least once a year, and the verification method of the four-in-one gas detector can be carried out with reference to the corresponding national standards for the verification procedures of the single gas detector.