Oxymat 7 - Siemens SIPROCESS GA700 Quick Start Manual

Introduction of toxic, aggressive or flammable gases
The limited release of toxic or corrosive gases cannot be avoided with absolute certainty.
Flush the device with oil-free and dry purge air or inert gas.
Collect the emerging purge gas for environmentally-friendly disposal with a suitable device.
5.2.2.2

OXYMAT 7

Safety instruction(s)
Note
Reference gas connection
• Connection for an external reference gas pump (low pressure connection):
The gas connections (4 and 3) are stainless steel pipes with a diameter of 6 mm.
Connection 4 (input) is connected to an external pump with a discharge pressure of
100 hPa to 150 hPa. Excessive reference gas flows from a module-internal bypass
restrictor out of connection 3 (outlet) into the ambient air. If the analyzer module is
installed in a tight control cabinet, connection 3 must be connected to the ambient air.
For more on this, refer to the nameplate of the analyzer module 7MB3020-xAxxx-xxxx;
the letter A is in the 10th place of the order number.
• Reference gas connection (high pressure connection)
The reference gas connection (connection 4) is a stainless steel pipe with a diameter of
6 mm. It is suitable for pressure up to 5000 hPa (abs.).
Refer to the nameplate of the analyzer module 7MB3020-xCxxx-xxxx; the letters C or D
are in the 10th place of the 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.
Quick Start
Compact Operating Instructions, 06/2017, A5E31805656-05
WARNING
Connecting
5.2 Gas connections
61