Siemens SITRANS LR 300, Instruction Manual, Page: 30 / 140

Page 28 SITRANS LR 300 – INSTRUCTION MANUAL 7ML19985CL02
mmm
mm
Inst
allat
ion
Rod Assembly
Rod Extension Requirements
n/r extension not required
* Consult Siemens Milltronics for assistance with nozzle sizes not listed.
** Application not recommended for 50mm (2”) I.D. nozzles longer than 100mm (4”). Shielded
rod antennas are available for these applications.
Mounting: Rod Assembly
Nozzle I.D. Nozzle Height mm (inches)*
<100 (4) 100 to 150 (4 to 6) 150 to 200 (6 to 8)
50mm (2”) n/r ** **
80mm (3”) n/r 50mm 100mm
100mm (4”) n/r 50mm 100mm
150mm (6”) n/r 50mm 100mm
>150mm (6”) n/r n/r n/r
50mm
(2”)
Teflon paste
(supplied)
Optional
Extension
100 mm
(4")
Notes:
• If water or process fluids enter
the connecting threads, this can
cause reflections at the
connection. These reflections will
appear as false echoes.
• Apply Teflon paste to the threads,
and tighten slowly. Ensure that
the rod sections mate securely
with no gaps. Do not apply too
much Teflon paste or the parts
will not mate securely.
• Do not use wrenches or pliers.
Hand tighten only.
Ideally, the nozzle should be as short as possible. If your
application requires a nozzle that exceeds our
recommended maximum length, consider using a shielded
rod configuration.
If you create a new nozzle for the radar unit, the weld
seams must be on the outside of the nozzle. Ensure that
there are no seams or lips on the inside of the nozzle or you
may get erratic readings.
SITRANS LR 300.book Page 28 Monday, June 10, 2002 7:18 PM