Installation Instructions - Siemens LR250 Instruction Manual

Stillpipe or Bypass Pipe requirements
• The pipe diameter must be matched with the antenna size. Use the largest antenna
size that will fit the stillpipe/bypass pipe (see
Raised-Face Flange per EN 1092-1
or
• Suitable pipe diameters:
Horn antenna:
PVDF antenna:
Not recommended:
• One continuous length of metallic pipe is preferred, without joints
• Joints (if unavoidable) must be machined to ± 0.25 mm (± 0.010") and must have a
welded connecting sleeve on the outside.
• Bypass vent
Device orientation
Bypass Pipe Installation
vent

Installation Instructions

WARNING: For pressure applications, it will be necessary to use PTFE
tape or other appropriate thread sealing compound, and to tighten the
process connection beyond hand-tight.
Note: On devices with a removable head, there is no limit to the number of times a
device can be rotated without damage.
Threaded Versions
1. Before inserting the device into its mounting connection, check to ensure the
threads are matching, to avoid damaging them.
2. Simply screw the device into the process connection, and hand tighten, or use a
wrench.
For pressure applicatons see Warning note above.
Flanged Versions
Flanged Horn with extension
See
Flat-Face Flange
18, and
1)
Bad joints create reflections.
2)
To equalize pressure and keep the liquid level in the bypass constant with the liquid
level in the vessel.
Page 26 SITRANS LR250 (HART) – INSTRUCTION MANUAL
on page 18).
40 mm (1.5") to 100 mm (4")
2" or 50 mm only
152.4 mm (6") or 203.2 mm (8")
required at the upper end of the bypass
Stillpipe Installation
align front or back of device
align front or back
with stillpipe slots
of device with
vents
Raised-Face Flange per EN 1092-1
on page 17,
on page 19, for dimensions.
Threaded Horn dimensions
1)
slots
on page 15
.
2)
on page
7ML19985JE06