Emerson Process Management GmbH & Co. OHG
1-6
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2012
1.2 Configuration of
Gas Lines
1.2.6 Optional Components for Gas Lines
The analyzers can, as an option, be fitted with
further components. Not all components are
available for all analyzer types:
• internal sample gas pump
• internal valve block
• internal flow sensors
• internal flow monitor switch
• internal barometric pressure sensor
• internal temperature sensors.
1.2.6.1 Internal Sample Gas Pump
An internal sample gas pump is used when
the sample gas is under insufficient pressure.
It ensures a constant flow of sample gas (max.
2.5 l/min through the analyzer).
When in internal pump is fitted, the relevant
parameter in the software setup dialog is set
to
Yes
(
6-88). The pump can be con
-
trolled either manually through a software
menu or optionally by a digital input.
Note!
Gas pressure is limited to atmospheric, if an
internal pump is used!
1.2.6.2 Internal Valve Block
An internal valve block allows all necessary
gas lines (zero gas, span gas, sample gas)
to remain permanently connected to the
analyzer. Valves are then activated automa-
tically when required (e.g. during automatic
calibration).
When an internal valve block is fitted, this
is shown in the relevant software setup
dialog as either
Internal
or
Int+Ext
(
6-88). The valves are controlled by either
a software menu, optionally by digital in
-
put, or automatically during autocalibration.
Depending on the model, up to two valve
bocks can be fitted.
1.2.6.3 Internal Flow Sensor
Up to two internal flow sensors can measure
the flow of gas and, compared to the flow
monitor switch can provide a flow reading.
They also can activate an alarm signal in the
event of a failure.
The alarm level for flow sensors is operator
adjustable to up to 2000 ml/min.
Depending
on the model, up to two sensors can be fitted
and evaluated separately.
When a sensor is fitted, the relevant parame
-
ter in the software setup dialog is set to
Yes
(
If the current flow rate is too low, a status
message is displayed and the parameter
under CHECK REQUESTS.. is set to
Yes
(
.
1.2.6.4 Internal Flow Monitor Switch
An internal flow switch monitors the gas flow
and activates an alarm signal in case it is
not sufficient. Compared to the flow sensore
it does not provide a flow reading, but only
indicates if the flow is sufficient, or not.
The alarm level for the internal flow switch is
fixed and not operator adjustable. Additional
external switches may be used and connected
via digital inputs. All fitted flow switches are
evaluated to share a common alarm.
When an internal flow switch is fitted, the re
-
levant parameter in the software setup dialog
is set to
Yes
(
If the current flow rate is too low, a status
message is displayed and the parameter
under CHECK REQUESTS.. is set to
Yes
(
.
Summary of Contents for Rosemount X-Stream Series
Page 535: ......
