Siemens SITRANS P - 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.
*DVILOOHGQHJDWLYH
SUHVVXUHOLQH
3UHVVXUHWUDQVPLWWHU
UHIHUHQFHOLQH
0D[LPXPOHYHO
8
SSHUUDQJHYDOXH
/RZHUUDQJHYDOXH
K
2
K
8
Measurement assembly on a closed container (no or little
condensate separation)
Formula:
Lower range value: Δp
MA
= ρ
· g · h
U
Upper range value: Δp
ME
= ρ · g · h
O
h
U
Lower filling level Δp
MA
Lower range value
h
O
Upper filling level Δp
ME
Upper range value
p Pressure ρ Density of the measured medium in
the container
g Acceleration due to gravity
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.
Installing/mounting
5.3 Installation (level)
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC 53