Endress+Hauser Deltabar PMD78B - Page 22

Mounting Deltabar PMD78B PROFINET with Ethernet-APL
22 Endress+Hauser
Level measurement in a closed vessel with superimposed vapor, diaphragm seal on
one side with temperature isolator
–
min.
max.
+
5
+ -
3
2
1
4
A0038707
1 Condensate trap
2 Shutoff valve
3 Separator
4 Drain valve
5 Device
• Mount the device directly on the vessel
• Always connect the piping on the negative side above the maximum level
• The condensate trap ensures constant pressure on the negative side
• When measuring in media with solid parts (such as dirty liquids) installing separators
and drain valves is useful for capturing and removing sediment
5.2.2 Differential pressure measurement
Differential pressure measurement in gases, vapors and liquids, diaphragm seal on
one side or two sides with capillary
–
+
3
4
5
≥ 100 (3.94)
+ -
2
1
A0038710
1 Device
2 Capillary
3 Diaphragm seal
4 e.g. filter
5 Ensure strain relief to prevent the capillary from bending (bending radius ≥ 100 mm (3.94 in)).
• Mount diaphragm seals with capillaries on pipes at the top or side
• In vacuum applications, mount the device below the measuring point