Seeking help from experts regarding chlorine gas alarm issues
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The chlorine detectors we had been using previously occasionally suffered from zero drift issues. After the introduction of the 19th edition of the standards, we used these standards to convince our management to replace the detectors in use. Regarding the settings for chlorine detection, while the standards require the installation of first and second level alarms at 1.39 ppm and 2.78 ppm respectively, due to the zero drift problem as well as the alarm values indicated in the monitoring reports issued by local testing agencies, we set the first and second level alarms at 2 ppm and 4 ppm! Theoretically, it exceeds the **norms, but I do this out of safety considerations, to prevent accidents caused by frequent false alarms that might lead to complacency among personnel! As a result, the expert immediately pointed out a serious hazard; I felt really frustrated and went ahead to complain: ‘(:'( The chlorine gas detectors purchased this time are from Teian, and their detection principle is electrochemical! I really feel oppressed :(:'(
Level 1: 0.16 ppm, Level 2: 0.32 ppm
How is it calculated? Is there a basis or formula for it?
Which standard specifies 1.39 and 2.78?
How did you calculate these numbers? What standards are being followed? Can an alarm of that brand be made?
50493: The value calculated based on IDLH for version 2019
We are facing this problem now as well. Our current set value is 1 mmp, but some people have suggested changing it to 0.3 ppm, which is also problematic