Oxymat 7 - Siemens SIPROCESS GA700 Operating Instructions Manual

Connecting
7.2 Gas connections
Installation/removal
The installation, removal and retrofitting of clamping screws or sample gas restrictors is limited
to only a few module types. For additional information, see → Gas connections (Page 43).
1. Installing restrictor or clamping screw:
Screw the sample gas restrictor or the clamping screw into the outlet. The tightening torque
is 1 Nm.
2. Connect the sample gas line again.
3. Removing restrictor or clamping screw: Proceed in reverse order.
See also
Combined operation (Page 39)
7.2.2

OXYMAT 7

Safety information
Note
Reference gas connection
● The reference gas connection with a PVDF screwed gland is only suitable for connection
to an external reference gas pump.
See module nameplate of the analyzer module 7MB3020-xAxxx-xxxx, letter A at the 10th
position of order number.
● The reference gas connection as a connection fitting with 6 mm diameter and clamp ring
screwed gland is only suitable for connecting reference gas pressures up to 5 000 hPa
(abs.).
See module nameplate of analyzer module 7MB3020-xCxxx-xxxx, letter C or D at 10th
position of order number.
Note
Shutting off the sample gas inlet and outlet
If you shut off the sample gas inlet and outlet, make sure that the reference gas can escape,
for example, by a 2-way valve at the sample gas outlet. Alternatively, the connection of an
overpressure valve is possible. The trigger pressure must then lie approx. 0.1 MPa above the
selected sample gas pressure.
Otherwise, excessive reference gas pressure can build up in the analyzer unit. The result could
be destruction of the internal pressure sensor or its connection to the analyzer unit.
Do not switch off the reference gas! Aggressive sample gases can destroy the microflow
sensor.
Ensure that the reference gas flowing via the sample gas outlet is discharged in an
environmentally friendly manner.
94
Rack-mounted device
Operating Instructions, 05/2015, A5E31874006-03