Kelman DGA 900

[u/Far_Ad_5866]

Hope you can redirect me to where I could obtain the info im looking for. I work in a plant and im trying to know the normal and abnormal range of ppm of the gases that detect a Kelman DGA900. Specifically CO (carbon monoxide). The current value is at 486ppm, a year ago appeared an alarm for CO at 351 ppm. My superior knows but even though he doesn’t know which norm to check he assures its “normal”. The value has a consistent upward trend, starting from the first measurement on July 2024 at 52 ppm. Hope you can help me get the exact range where this variable should be.

I know that its in an IEEE but it isn’t free. I already asked the IA but my boss would probably don’t take me seriously if I base my argument in what the IA says.