Siemens SITRANS P DS III - Product Description and Principle of Operation; System Configuration and Application

SITRANS P DS III/P410 (7MF4.33.. 7MF4.34.. 7MF4.35..)
A5E03434626-04, 05/2015
19
Measurement assembly on an open container
Formula:
Start of scale value: p
MA
= ρ · g · h
U
Full
-scale value: p
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
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)
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