C6097 · Edition 01.19 9
Function
3.2 Positive pressure measurement
Positive pressure measurement is designed, for ex-
ample, for checking the fan function or measuring the
min./max. gas pressure.
4
3
1
2
Gas, air, flue gas, biogas
The positive pressure is measured in the lower dia-
phragm chamber, port 1 (or 2). The upper diaphragm
chamber is ventilated via port 4 (or 3).
3.3 Negative pressure measurement
Negative pressure measurement is designed, for exam-
ple, for monitoring a suction pressure blower.
4
3
1
2
Air, flue gas
The negative pressure is measured in the upper dia-
phragm chamber, port 4 (or 3). The lower diaphragm
chamber is ventilated via port 1 (or 2).
3.4 Differential pressure measurement
Differential pressure measurement is designed for
safeguarding an air flow rate or for monitoring filters
and fans, for example.
4
3
1
2
4
3
1
2
The higher absolute pressure is connected to port 1 (or
2), and the lower absolute pressure to port 4 (or 3). The
remaining ports must be tightly plugged.
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