Siemens SIPROCESS GA700 Quick Start Manual page 65

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.
Arrangement of the gas connections
①
1
2
3
4
Figure 5-16
Version with pipes
The sample gas connections are made of stainless steel, material no. 1.4571 or Hastelloy,
material no. 2.4819. The reference gas connection is made of stainless steel, mat. no. 1.4404.
The gas connections are provided as connection fittings with a diameter of 6 mm.
Quick Start
Compact Operating Instructions, 05/2015, A5E31805656-03
1
OXYMAT 7
Sample gas inlet
Sample gas outlet
N.C., bypass outlet for version with external reference gas pump
Reference gas inlet
OXYMAT 7 gas connections
Connecting
5.2 Gas connections
65