76 EL3060 CONTINUOUS GAS ANALYZERS | OI/EL3060-EN REV. A
Test gases
Analyzer Test gas for zero-point calibration
and single-point calibration
Test gas for end-point calibration
Magnos28 Oxygen-free process gas Process gas with known O
2
concen-
tration
Magnos28 with suppressed
measuring range
Test gas with O
2
concentration near
the starting point of the measuring
range
Test gas with O
2
concentration near
the end point of the measuring range
Magnos28 with single-point
calibration
Test gas with O
2
concentration in an
existing measuring range or ambient
air. Same moisture content as pro-
cess gas.
–
Magnos28 with substitute
gas calibration
Oxygen-free process gas or substi-
tute gas (O
2
in N
2
)
Substitute gas, e.g. dried air
CAUTION
In order to avoid accumulations of explosive gas mixtures, do not use air as
a test gas for single-point calibration when measuring flammable gases!
Dew point
The dew point of the test gases must be approximately the same as the dew
point of the sample gas.
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