OPERATING MANUAL OXYGEN MONITORING SYSTEM
OMS 420
11
7
System components, general information
The OMS420 is used to continuously measure oxygen and combustible gas concentrations in flue and stacks of industrial boilers or
furnaces, and those measurements are used to finely tune the combustion process.
7.1
Optimizing combustion
Optimum combustion conditions are achieved by decreasing the amount of excess air in the stack gas to the point where combus-
tibles start to increase. See combustion diagram below:
The absolute value of combustibles in the stack gas of a burner depends very much on the design and construction of the
burner/boiler. Combustibles (CxHy) are lower in a well-designed system than they are one that is poorly designed.
2 x 4 … 20 mA
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