Siemens SITRANS P - Installation with Remote Seal

To compensate the liquid column on the minus side, reset the zero point.
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-
K
2
K
8
K
Y
Measurement assembly on a closed container (strong condensate
formation)
Formula:
Lower range value:
Δp
MA
= g · (h
U
· ρ - h
V
· ρ')
Upper range value:
Δp
MA
= g · (h
O
· ρ
- h
V
· ρ')
h
U
Lower filling level Δp
MA
Lower range value
h
O
Upper filling level Δp
ME
Upper range value
h
V
Gland distance ρ Density of the measured medium in
the container
p Pressure ρ ' Density of fluid in the negative pres‐
sure
line
corresponds to the prevailing
temperature there
g Acceleration due to gravity
The process connection on the negative side is a female thread
1
/
4
-18 NPT or an oval flange.
Lay the line for the negative pressure using a seamless steel tube 12 mm x 1.5 mm.
5.4 Installation with remote seal
Notes
●
Keep the measuring system in the factory packing until it is installed in order to protect it from
mechanical damage.
● When removing from the factory packing and installing: ensure that damage to and
mechanical deformations in the membrane are prevented.
● Never loosen the sealed filling screws on the remote seal and the measuring instrument.
Installing/mounting
5.4 Installation with remote seal
SITRANS P320/P420 with 4 to 20 mA/HART
54 Operating Instructions, 11/2019, A5E44852162-AC