Reference Gas Monitoring - Siemens SIPROCESS GA700 Operating Instructions Manual

Description
4.4 OXYMAT 7
4.4.2

Reference gas monitoring

NOTICE
Damage to the microflow sensor
The microflow sensors can be damaged by aggressive sample gas components. As long as the
reference gas is flowing, the sample gas is prevented from diffusing to the microflow sensors
and destroying them.
• Ensure that the microflow sensors have no contact to the sample gas. To do this, monitor
• Ensure that there is a continuous supply of reference gas during operation.
• Interrupt the sample gas supply if the reference gas pressure is too low, and flush the sample
Note
Sample gas pressure increase influences the sample gas pressure switch
At the time of delivery of an OXYMAT 7 analyzer module, the internal pressure switch for
reference gas monitoring is preset to approx. 2000 hPa (3000 hPa abs.). Changes in the sample
gas pressure in the analyzer module by more than 150 hPa require a change in the pressure
switch switching point by the same amount. The monitoring functionality of the reference gas
pressure switch is modified as a result.
• For changes to the sample gas pressure, contact the Service (Page 149).
• Have the pressure switching point of the reference gas pressure switch adjusted by a Siemens
technician or someone trained for this case.
See also
Reference gas monitoring with pressure switch (Page 93)
26
the reference gas pressure using an internal (optional) or external pressure switch.
gas path with inert gas.
Rack-mounted device
Operating Instructions, A5E31874006-12