CO2 is the hazard people in this industry are most used to and least afraid of. It is heavier than air, so it pools in cellars, pits and low corners; it is odourless, so there is no warning; and oxygen deficiency impairs judgement before the person affected recognises anything is wrong. Fixed and personal monitors are the only thing standing between routine cellar work and a fatality, which makes their calibration a life-safety task rather than an instrument task.
The steps ChatterFix schedules for this PM. Every step is a checkable item on the work order — a technician can speak their way through it without touching a keyboard.
CO2 is the hazard people in this industry are most used to and least afraid of. It is heavier than air, so it pools in cellars, pits and low corners; it is odourless, so there is no warning; and oxygen deficiency impairs judgement before the person affected recognises anything is wrong. Fixed and personal monitors are the only thing standing between routine cellar work and a fatality, which makes their calibration a life-safety task rather than an instrument task.
Monitors drift out of calibration, alarms get muted because they nuisance-trip during transfers, and ventilation interlocks get bypassed for noise. None of it matters until a fitting fails or a tank vents into a poorly ventilated space — and the person who walks in has no way to know before they are already impaired. Rescuers entering without monitors are how a single casualty becomes several.
Monthly bump tests, calibration per the manufacturer's schedule. Any alarm event, any monitor that has been muted, and any change to cellar ventilation should trigger an immediate check rather than waiting for the next cycle.
This procedure — and every other PM for your industry — is already built into ChatterFix. Pick your industry and it lands on the right equipment, on the right interval, in about three minutes.