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Emerson Process Management GmbH & Co. OHG3-12
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
performance or damage to the sensor. Do not
remove the sealing caps until all associated
sample handling components are installed
and the instrument is fully ready for installa-
tion.
After replacement purge gas paths with inert
gas (nitrogen (N
2
) or sample gas as soon as
possible to avoid prolonged exposure of the
sensor to high concentrations of oxygen. The
longer the sensor is exposed to air, the longer
it will take for the sensor to recover to low
ppm levels. When installing a new sensor or
starting the instrument for the rst time, it may
take as long as eight hours for the analyzer
to purge down to the lowest operating range.
After initial startup or startup following a pro-
longed shutdown, the analyzer may require
extended time to recover to the range of
measurement. Commonly, this is caused by
the introduction of ambient air into the sample
and/or vent lines to the sensor. The presence
3.2 Oxygen Measurement
of higher than normal levels of oxygen at the
sensor will cause the sensor electrolyte to be-
come saturated with dissolved oxygen. When
the instrument is placed in operation, the sen-
sor must now consume all excess dissolved
oxygen above the desired measuring level.
All analyzers with electrochemical tO
2
cell
have to be purged with inert gas (Nitrogen, N
2
)
prior to disconnecting the gas lines! Then the
gas line ttings have to be closed for transport
or depositing the analyzer.
While handling the sensor,
always consider the documen-
tation provided together with
the sensor, especially the infor-
mation on the included material
(safety data) in the attachment
of the documentation!
Note for X2GP analyzers!
If the X2GP analyzer features a thermostate
control, the tO2 sensor block is installed at
the X2GP rear panel.
Fig. 3.10 Cover for tO2 sensor block at rear panel
Cover