KROHNE OPTIBAR P 3050 C EN - Manual (Page 35)

TECHNICAL DATA
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OPTIBAR P 3050 C
www.krohne.com 03/2012 - 4001953401 - MA OPTIBAR P3050C R02 en
Absolute pressure
During the production process, the sensor is evacuated on the negative side of the measuring
cell and then sealed and referenced against a vacuum.
The pressure transmitter now measures the absolute pressure (1) compared to a "zero"
pressure in an empty space (vacuum).
Gauge pressure
The back of the sensor is open to the atmosphere via air ventilation. The device is thus
automatically referenced to the continuously changing ambient air pressure, indicating the
gauge pressure (2) in the process compared to the respective atmospheric pressure.
Available measurement configurations
a: P
e
= Effective pressure [2 bar]
b: P
amb
= Ambient pressure [1.013 bar]
c: P
0
= Vacuum [0 bar]
1 Absolute pressure [1.513 bara]
2 Gauge pressure [0.5 barg]
.book Page 35 Thursday, March 8, 2012 9:29 AM