Siemens SIPROCESS GA700 Operating Instructions Manual page 44

Description
3.7 Combined operation
Note
Unstable display of the measured value
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.
Sample gas disposal
Note
Sample gas disposal
Make sure that the exhaust line is free from fast pressure fluctuations. To do so, take one of
the measures listed below:
● 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 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 are not equipped with clamping screws or sample gas restrictors.
Subsequent upgrading or retrofitting is not possible and not required.
● CALOMAT 7: Clamping screws only.
44
Rack-mounted device
Operating Instructions, 05/2015, A5E31874006-03