Siemens SITRANS P - Page 57

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X
+
R
Installation type B: Pressure transmitter
below the measuring point
Start of scale value:
p
LRV
= ρ
FL
* g * H
U
+ ρ
oil
* g * H
1
Full-scale value:
p
URV
= 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
LRV
Start of scale value
p
URV
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 container flange to pressure transmitter
For absolute pressure measurements (vacuum), install the pressure transmitter at least at the
height of the remote seal or below it (see installation types C).
Installing/mounting
5.4 Installation with remote seal
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC 57