Siemens SIPROCESS GA700 Quick Start Manual page 58

Connecting
5.2 Gas connections
Note
Unstable measured value display due to pressure surges
Pressure surges can result in unstable measured value displays when the sample gas flow is
superimposed by fast pressure fluctuations or a sample gas pump delivers sample gas into
the device. To protect the device from pressure surges, we recommend that:
• You use the supplied sample gas restrictors.
• Use a pneumatic low-pass filter (restrictor and damping vessel), if necessary.
Note
Sample gas disposal: keep exhaust line free from fast pressure fluctuations
Make sure that the exhaust line is free from fast pressure fluctuations:
• Install a special exhaust line.
• Install a damping vessel (> 1 l) with a downstream restrictor between the device and the
exhaust line (pneumatic low pass).
Note
Equipping analyzer modules with sample gas restrictors and/or clamping screws
In the delivery state, the analyzer modules are equipped as follows at the factory:
• OXYMAT 7: Sample gas restrictor at the sample gas inlet, otherwise clamping screws
everywhere.
• ULTRAMAT 7: Is not equipped with clamping screws or sample gas restrictors.
Subsequent upgrading or retrofitting is not possible and not required.
• CALOMAT 7: Only with clamping screws.
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Compact Operating Instructions, 06/2017, A5E31805656-05
Quick Start