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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