Assembly on a 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. Install a condensation container if required.
)XOOVFDOHYDOXH
6WDUWRIVFDOHYDOXH
0D[LPXPOHYHO
6WDWLF
SUHVVXUH
K
2
K
8
*DVILOOHGORZ
SUHVVXUHOLQH
7UDQVPLWWHU
UHIHUHQFHOLQH
Measurement assembly on a closed container (no or little
condensate separation)
Formula:
Start of scale value: Δp
MA
= ρ · g · h
U
Full-scale value: Δp
ME
= ρ · g · h
O
h
U
Lower filling level Δp
MA
Start of scale value
h
O
Upper filling level Δp
ME
Full-scale value
p Pressure ρ Density of the measured medium in the
container
g Acceleration due to gravity
Installing/mounting
5.3 Installation (level)
SITRANS P320/P420 (mA/HART)
48 Operating Instructions, 06/2018, A5E44852162-AA
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