Analyzers should be verified annually using a certified test gas. These gases are available in various concentrations—10 PPM, 100 PPM, 1%, etc.—and the appropriate type depends on your analyzer model and the required purity specification of your system.
The test gas is supplied in a 1-liter pressurized cylinder, which typically lasts for several years under normal use. A special regulator is required to connect the cylinder to your generator’s sample line.
To perform the verification:
Connect the regulator to the test gas cylinder and attach it to the sample line.
Open the regulator to allow gas flow.
Wait approximately 10 minutes for the reading on your PLC display to stabilize.
Confirm that the displayed value matches the concentration of the test gas.
If the values match, your analyzer is functioning correctly.
If there is a discrepancy, the fuel cell in the analyzer likely needs to be replaced.
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