26
EL3000
CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D
… 4 Preparation for Installation
… Magnos28
Test gases – Magnos28
Analyzer
Test gas for zero point calibration and single-point
calibration
Test gas for the end-point calibration
Magnos28
Oxygen-free process gas
Process gas with a known O
2
concentration
Magnos28
with a suppressed measuring
range
• Zero point calibration: pure nitrogen or hydrogen-free
operating gas
• Single-point calibration: 100 Vol.-% O
2
or test gas
with O
2
concentration in the measuring range
Test gas with O
2
concentration near the end point of the
measuring range, or pure oxygen
Magnos28
with single-point calibration
Test gas with O
2
concentration in an existing measuring
range or ambient air.
—
Magnos28
with substitute gas calibration
Oxygen-free process gas or substitute gas (O
2
in N
2
)
Substitute gas, for example dried air
Ma Caldos27
(manual calibration)
In addition to the above mentioned test gases for Magnos28, additional test gases are needed for the calibration of
Caldos27.
The requirements are shown in the table in section
Ma Caldos27
(automatic calibration)
See the table in section
on page 32 for instructions on test gases and possible limitations in
automatic calibration.
Dew point
The dew point of the test gases must be approximately equal to the dew point of the sample gas.
Note
The instructions for calibration must be observed, see
Magnos28 – notes for calibration
