Siemens SITRANS P DS III Operating Instructions Manual page 47

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 pockets of condensate
do not form. Install a condensation container if required.
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. You can cut off the device using the dual pneumatic block
7MF9001-2.
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09
Lower filling level
Upper filling level
Pressure
Formula:
Start-of-scale value: Δp
h
U
Full-scale value: Δp
Δp Start of scale value
MA
Δp Full-scale value
ME
ρ Density of the measured medium in
the container
g Acceleration due to gravity
Installing/mounting
4.4 "Level" installation
= ρ · g ·
MA
= ρ · g · h
ME O
47