Installation Of The Remote Seal With The Capillary Line - Siemens SITRANS P DS III Operating Instructions Manual

Installing/mounting
4.5 "Remote seal" installation
Using remote seals with pressure measuring device for hazardous areas:
● When using remote seals with pressure measuring device for hazardous areas, the
permissible limits of ambient temperatures for the transmitter must not be exceeded. Hot
surfaces on the cooling section (capillaries or cooling elements) are a possible source of
ignition. Initiate suitable measures.
● When remote seals with a flame arrestor are used, the pressure measuring instrument
determines the permissible ambient temperature. In the case of potentially explosive
gaseous atmosphere, the temperature around the flame arrestor must not exceed
+60 °C.
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
– If halocarbon oil is used as the filling liquid, this maximum height difference is only
If negative overpressure is observed during measurements, reduce the permissible height
difference accordingly.
50
following in mind: the height difference of H
with silicone, glycerin or paraffin oil filling. = 7 m must not be exceeded.
H = 4 m, see installation types A and B.
1max.
for remote seal measuring systems
1max.
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09