Siemens SITRANS LR 300, Instruction Manual, Page: 33 / 140

7ML19985CL02 SITRANS LR 300 – INSTRUCTION MANUAL Page 31
mmm
mm
Inst
allat
ion
Mounting: Stillpipe or Sidepipe
This is an alternative to the waveguide antenna option, used for products with an
ε
r
less
than 3 or for extremely turbulent or vortex conditions. This mounting arrangement can
also be used to provide optimum signal conditions on foaming materials.
Suitable pipe diameters are 50mm (2”) to 250mm (10”). A rod antenna or a horn antenna
may be used.
Smoothness
One continuous length of metallic pipe is preferred, without joints. If joints are
unavoidable, you must machine them to close tolerances (
±
0.25mm [
±
0.010”]) and weld
a connecting sleeve on the outside.
See P655 on page 68 for the related propagation factor.
Ensure there is a vent at the upper end of the side pipe to equalize pressure and keep the
liquid-level in the pipe constant with the liquid-level in the vessel.
Suitable pipe diameters
are 50mm (2”) to
250mm (10”).
You can use either a
rod or horn antenna.
Vent hole
SITRANS LR 300.book Page 31 Monday, June 10, 2002 7:18 PM