
Pressure transmitter below the
measuring point
Start of scale value:
p
MA
= ρ
FL
* g * H
U
- ρ
oil
* g * H
1
Full-scale value:
p
ME
= ρ
FL
* g * H
O
- ρ
oil
* g * H
1
H
1
≤ 7 m (23 ft); with halocarbon oil as the filling liquid, only H
1
≤ 4 m(13.1 ft)
Key
p
MA
Start of scale value
p
ME
Full-scale value
ρ
FL
Density of the process medium in the container
ρ
oil
Density of the filling oil in the capillary line of the remote seal
g Acceleration due to gravity
H
U
Lower filling level
H
O
Upper filling level
H
1
Distance between the container flange and the pressure transmitter
For absolute pressure measurements (vacuum), install the measuring device at least at the
height of the remote seal or below it (see installation types C).
Installation types for absolute pressure measurements (closed containers)
Installation type C
1
Start of scale value:
p
MA
= p
start
+ ρ
oil
* g * H
1
Full-scale value:
p
ME
= p
end
+ ρ
oil
* g * H
1
Installation type C
2
Installing/mounting
4.5 "Remote seal" installation
SITRANS P, DS III series with HART
50 Operating Instructions, 09/2012, A5E00047092-08
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