Alarm calibration
Thread Content
Recently, there have been quite a few cases involving alarms, but I haven’t dealt with them very often before. The situations at the scene vary greatly. I would like to ask the experts: First, is a professional calibration certificate required for calibrating alarms? Second, if the alarm indicates an overreading at the site while the handheld alarm works normally, is it possible to adjust the alarm’s zero point to resolve the issue?
I. The calibration of alarms usually requires a professional calibration certificate to ensure safety and accuracy. II. If the on-site alarm indicates an over-alarm condition while the handheld alarm is functioning normally, it is not recommended to adjust the zero point directly in order to dismiss the alarm. The cause should be identified first to check for any environmental interference or equipment failures. .
If I understand correctly, you are referring to things like combustible gas detectors. Normally, professional qualifications are required, but nowadays most chemical plants adopt two approaches: one is to send their own staff to professional institutions to undergo training and take exams to obtain the necessary certifications, after which they carry out regular inspections themselves (with an inspection interval of three months); the other approach is to outsource these tasks to professional institutions. Of course, there are also companies that handle things on their own by filling out records, and the safety supervision authorities have never found any problems with them. As you mentioned, the display alarm gives an overreported reading while the handheld alarm functions normally; the correct approach in such a situation is to recalibrate the alarm, rather than simply setting the zero point. Usually, the handheld device shows no values, while the alarm will display zero only when it has those three or two values, as the impact is minimal (of course, this is not standard practice). Finally, under no circumstances should you change the parameters of the alarm, including its range and alarm thresholds; this is an illegal act.
Also, gas detectors are usually of the catalytic combustion type; their lifespan is greatly influenced by the environment. They are consumable items that need to be replaced when necessary
Thank you for your detailed reply; I need to study harder*