EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. C 29
Test gases – Caldos27
Test gas for zero point calibration and single-point
Test gas for the end-point calibration
Sample component-free test gas or process gas
Test gas or process gas with a known sample component
concentration
with a suppressed
range
Test gas with a sample component concentration near
the starting point of the measuring range
Test gas with a sample component concentration near
the end point of the measuring range
with single-point calibration Test gas with a known and constant rTC value (standard
gas; possibly also dried room air)
—
In addition to the above mentioned test gases for Caldos27, additional test gases are needed to calibrate
Magnos28.
The requirements are provided in the table in Test gases – Magnos28 on page 23.
Same as manual calibration, with the following limitation:
Zero point and single point calibrations are performed
for all sample components simultaneously, since for thid
purpose, only one common digital output can be used for
valve control (unlike with end point calibration) for this
purpose (Calibration in the operating instruction).
This results in limitations with regard to the possible test
gases, which in particular depend on the configuration of
the
• Measurement components
• Measuring ranges
• Gas paths (series or isolated)
Depending on these conditions, certain automatic
calibration methods cannot be performed in a practical
As in the case with manual calibration, a separate end
point gas valve must be available for each sample
component without a single point calibration, which is
controlled via a correspondingly configured digital
output (Calibration in the operating instruction).
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 Operating instruction.
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