Siemens SITRANS Probe LR Quick Start Manual page 7

Mounting on a manhole cover
To provide optimum signal conditions on a manhole cover, locate the antenna off-center
relative to the cover, typically 100 mm (4") from the side of the manhole.
• Use the 100 mm (4") shield on nozzles that are 100 mm (4") in length, or shorter.
• Use the 250 mm (10") shield on nozzles that are 250 mm (10") in length, or shorter.
Mounting instructions
• Before inserting SITRANS Probe LR into its mounting connection, check to ensure the
threads are matching to avoid damaging them.
• Simply screw SITRANS Probe LR into the process connection, and hand tighten.
• For pressure applications, it will be necessary to use PTFE tape (or other appropriate
thread-sealing compound) and tighten the process connection beyond hand-tight.
The maximum torque is 40 N-m (30 ft-lbs).
• To rotate the enclosure, use a 2 mm Allen key to loosen the three set-screws that secure
the locking collar. Once the enclosure is positioned as desired, tighten the set-screws.
Wiring
1
Power
WARNINGS:
DC terminals shall be supplied from an SELV
1010-1 Annex H.
All field wiring must have insulation suitable for rated voltages.
Connecting SITRANS Probe LR
Notes:
• For detailed wiring instructions, please refer to the full Operating Instructions.
• Use shielded, twisted pair cable (wire gauge AWG14 to AWG22).
• Separate cables and conduits
wiring practices, or electrical codes.
• The non-metallic enclosure does not provide a continuous ground path between conduit
connections: use grounding type bushings and jumpers.
1.
Safety Extra Low Voltage
2.
If cable is routed through conduit, use only approved suitable-size hubs for waterproof application.
A5E32106153
minimum
100 mm (4")
1
may be required to conform to standard instrumentation
SITRANS Probe LR – QUICK START MANUAL
Mounting on a nozzle
1
source in accordance with IEC-
2
minimum
10 mm (0.4")
Page EN-5