Siemens SITRANS L Series Petunjuk Pengoperasian yang Ringkas - Halaman 18

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Installing/mounting

4.5 Mounting instructions

Location on a manhole cover

● A manhole cover is typically a covered nozzle with a diameter 610 mm (24") or greater.

● For optimum signal conditions, locate the antenna off-center, typically 100 mm (4") from

the side.

Note

Nozzle design

• For nozzles 100 mm (4") in length or shorter, use the 100 mm (4") shield.

• For nozzles 250 mm (10") in length or shorter, use the 250 mm (10") shield.

4.5

Mounting instructions

Note

Rotating the enclosure

Do not rotate the enclosure after programming and vessel calibration, otherwise an error

may occur, caused by a polarity shift of the transmit pulse.

1. Before inserting SITRANS Probe LR into its mounting connection, check to ensure the

threads are matching, to avoid damaging them.

2. 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.).

3. If you need to rotate the enclosure, use a 2 mm Allen key to loosen the three set screws

that secure the locking collar.

4. Once the enclosure is in a suitable position, tighten the set screws.

SITRANS Probe LR with mA/HART

Compact Operating Instructions, 05/2019, A5E46248119-AC