Siemens SITRANS P Operating Instructions Manual page 53

Mounting on closed container
When taking measurements in a closed container without or with little condensate formation,
the negative pressure line is not filled.
Lay the line in such a way that condensation pockets do not form. If required, you need to install
a condensation container below the negative pressure line of the pressure transmitter.
Measurement assembly on a closed container (no or little
condensate separation)
h
U
h
O
p
When taking measurements in a closed container with strong condensate formation, you must
fill the negative pressure line (mostly with the condensate of the measured medium) and install
a condensate pot. Lock the device using the dual pneumatic block 7MF9017-..A.
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
Lower filling level
Upper filling level
Pressure
Formula:
Lower range value: Δp
Upper range value: Δp
Δp Lower range value
MA
Δp Upper range value
ME
ρ Density of the measured medium in
the container
g Acceleration due to gravity
Installing/mounting
5.3 Installation (level)
= ρ · g · h
MA U
= ρ · g · h
ME O
53