Siemens SITRANS P Instruções de Operação Página 51

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4.5.2 Installation of the remote seal with the capillary line
Notes
Do not rest the measurement assembly on the capillary line.
Do not bend capillary lines; risk of leakages and/or risk of considerable increase in the
setting time of the measuring system.
Owing to the risk of bending and breakages, pay attention to mechanical overloads at the
joints such as capillary line-remote seal and capillary line-measuring device.
Unwinding the excess capillary lines with a radius of at least 150 mm.
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.
for remote seal measuring systems with
silicone, glycerin or paraffin oil filling. = 7 m must not be exceeded.
If halocarbon oil is used as the filling liquid, this maximum height difference is only
H
1max.
= 4 m, see installation types 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
+
+
+
X
+
R
Pressure transmitter above 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
Installation type B
Installing/mounting
4.5 "Remote seal" installation
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 49
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