Siemens SITRANS P310 with HART Compact Operating Instructions page 18

● Fasten the capillary line such that there are no vibrations.
● Permissible height differences:
– When installing the pressure measuring device above the measuring point, keep the following in mind: the height
difference of H
1max.
exceeded.
– If halocarbon oil is used as the filling liquid, this maximum height difference is only H
A and B.
If negative overpressure is observed during measurements, reduce the permissible height difference accordingly.
Installation type for gauge pressure and level measurements (open containers)
Installation type A
Pressure transmitter above the measuring point
Installation type B
Pressure transmitter below the measuring point
H ≤ 7 m (23 ft); with halocarbon oil as the filling liquid, only H
1
Key
p
MA
p
ME
ρ
FL
ρ
oil
g
H
U
H
O
H
1
SITRANS P310 with HART
A5E35075329-01, 05/2015
for remote seal measuring systems with silicone, glycerin or paraffin oil filling. = 7 m must not be
Start of scale value
Full scale value
Density of the process medium in the container
Density of the filling oil in the capillary line of the remote seal
Acceleration due to gravity
Lower filling level
Upper filling level
Distance between the container flange and the pressure transmitter
Start of scale value:
p = ρ * g * H - ρ * g * H
MA FL U oil
Full scale value:
p = ρ * g * H - ρ * g * H
ME FL O oil
Start of scale value:
p = ρ * g * H + ρ * g * H
MA FL U oil
Full scale value:
p = ρ * g * H + ρ * g * H
ME FL O oil
≤ 4 m(13.1 ft)
1
= 4 m, see installation types
1max.
1
1
1
1
17