Emerson Process Management GmbH & Co. OHG1-8
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
04/2010
1.2.6.7 Optional Heated Area
The physical components can be optionally
separated from the elec trical co mponents
by means of a special box (not an option for
½ 19 in units). This can be done for one or
both of the following purposes:
Firstly, the box allows the physical compo -
nents to be regulated to a temperature of
approx. 60 °C, avoiding condensation of
gases or minimizing the inuence of varying
environmental temperatures.
Secondly, the box can be purged with, for
example, inert gas. The purge gas is rst fed
through a separate tting, purges the elec-
tronic components, then oods the box and
leaves the instrument via another tting.
Purging in this manner can be useful when
measuring very low concentrations (e.g. of
CO or CO2): the expulsion of ambient air
avoids adulterant outside inuences.
Alternatively, purging can be used to secure
enhanced protection for electronic parts and
operators from corrosive or toxic gases: any
leaking gas is expelled from the housing and
does not escape into the vicinity of the unit or
come into contact with any electronic compo-
nents located outside the box.
In either case, the purge gas outlet should be
connected to an exhaust gas line.
Fig. 1-2: Optional Heated Area
The gure shows the heated
area with the insulating cover
removed.
Insulating cover
Physical
components
(example)
Heated moun-
ting panel
Cable support for
signal wires
1.2 Conguration of Gas Lines