Emerson Process Management GmbH & Co. OHG
2-5
2
Installation
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
2.3 Installation – Gas Conditioning
Enclosure purge option
The purge medium (e.g. to minimize CO
2
interference or for enhanced safety when
measuring corrosive or poisonous gases)
• must be dry, clean and free of cor-
rosives or components containing
solvents.
• has to be free of components to be
measured, to minimize cross interfer-
ences.
Its temperature must correspond to the am-
bient temperature of the analyzer, but be at
least within the range 20
…
35 °C (68
…
95 °F).
Consider the Special Condi-
tions for Safe Use.
We recommend to always purge
the analyzer enclosure, if gases
are supplied, which may harm
analyzer components, if due to
leak of the containment system!
Open reference option
In some cases, the measuring cell has an open
reference side, to be supplied with nitrogen.
This nitrogen
• at least should be of quality 5.0, which
means nitrogen of purity ≥ 99.999 %.
If such gas is not available, the substitute
• must be dry, clean and free of corrosives
or components containing solvents.
• has to be free of components to be
measured, to minimize cross interfer-
ences.
In any case, the gas temperature must cor-
respond to the ambient temperature of the
analyzer, but at least be within the range
20
…
35 °C (68
…
95 °F).
Pressure and gas flow must remain within
the values given in the
“Measurements
Specifications” section within this manual.
Perform a calibration each
time the source of this open
reference gas (e. g. bottle) has
changed!