EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. B 19
Uras26: Preparation for installation
Sample gas
Sample gas inlet conditions
The analyzer must not be used for measurement of ignitable gas/air or
gas/oxygen mixtures.
Temperature The dew point of the sample gas must be at least 5 °C
lower than the lowest ambient temperature in the overall
sample gas path. Otherwise, a sample gas cooler or con-
densate trap is required.
Pressure The analyzer is operated under atmospheric pressure; the
sample gas outlet is open to atmosphere. Internal pres-
sure drop < 5 hPa with standard flow rate 60 l/h. Permis-
sible absolute pressure range: 800 to 1250 hPa. Operation
under lower absolute pressure (e.g. at altitudes above
2000 m) on request. Overpressure in the sample cell max.
500 hPa.
Flow 20 to 100 l/h
Corrosive gases
Highly corrosive associated gas components such as chlorine (Cl
2
) or hy-
drogen chlorides (e.g. wet HCl) as well as gases or aerosols containing chlo-
rine must be cooled or pre-absorbed.
Flammable gases
In the version with gas lines and connectors made of stain-less steel the
analyzer is suitable for measuring flammable gases in general purpose envi-
ronment. The special requirements for the measurement of flammable gas-
es (see page 43) must be observed.
Flowing reference gas
Gas inlet conditions as for sample gas
Test gases
Analyzer(s) Test gas for zero-point calibration
and single-point calibration
Test gas for end-point calibration
Uras26 with calibration cells
(automatic calibration)
N
2
or air or
IR sample component-free gas
– (calibration cells)
Uras26 without calibration
cells (automatic calibration)
N
2
or air Span gas*
Uras26 without calibration
cells (manual calibration)
N
2
or air Test gas for each sample component
Uras26 +
Magnos206/Magnos28
(automatic calibration, i.e.
Magnos206/Magnos28 with
single-point calibration)
IR sample component-free test gas
with O
2
concentration in an existing
measuring range or ambient air. Same
moisture content as process gas.
Calibration cells or span gas*
Uras26 +
Magnos206/Magnos28
(manual calibration)
Zero gas for Uras26, respectively
Magnos206/Magnos28, or IR sample
component-free test gas with O
2
concentration in an existing measur-
ing range or ambient air. Same mois-
ture content as process gas.
Span gas for all sample components
in the Uras26 and Magnos206/
Magnos28 (possibly only for the
Uras26 if a single-point calibration is
carried out for the Magnos206)
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