Endress+Hauser Cerabar PMP51B, Operating Instructions Manual

Page: 17 / 60

Cerabar PMP51B Analog Mounting
Hauser 17
• Keep the pressure compensation element (1) free from contamination
• A position-dependent zero point shift (when the vessel is empty the measured value
does not display zero) can be corrected
• Diaphragm seals also shift the zero point, depending on the installation position
• The use of shutoff devices and/or water pocket pipes is recommended for mounting
• The orientation depends on the measuring application
5.2 Mounting the device
5.2.1 Pressure measurement in gases
1
2
A0038730
1 Device
2 Shutoff device
Mount the device with the shutoff device above the tapping point so that any condensate
can flow into the process.
5.2.2 Pressure measurement in vapors
1
2
3
4
1
2
A0038731
1 Device
2 Shutoff device
3 U-shaped water pocket pipe
4 O-shaped water pocket pipe
A water pocket pipe reduces the temperature to almost the ambient temperature. The
defined water column only causes minimal (negligible) measured errors and minimal
(negligible) thermal effects on the device.
Observe the maximum permitted ambient temperature of the transmitter!
• Ideally, mount the device with the O-shaped water pocket pipe below the tapping point
The device may also be mounted above the tapping point
• Fill the water pocket pipe with liquid before commissioning