Sitrans Lr 400; Structure - Siemens SITRANS LR 400 Instruction Manual

SITRANS LR 400

The SITRANS LR 400 Radar Level Instrument is designed for level measuring of liquids and
solids in storage vessels. SITRANS LR 400 operates reliably with its high microwave
frequency even with poorly reflecting measuring media. The narrow antenna beam results
in a sharp radiation cone, therefore SITRANS LR 400 is quite insensitive to vessel
interferences.

Structure

9
8
Mechanical section
The terminals for the power cable and the signal cable are behind the connection cover
(9) on the left hand side of the housing (1). The signal cable must be fed in from the right
through the cable glands (2).
The device can be separated into electronic and mechanical sections at the threaded
ring (5).
An optional temperature extension is positioned between the threaded ring (5) and the
flange (6). Refer to Dimension diagram on page 8.
The end of the antenna (7) must reach inside the vessel through the vessel nozzle (see
page 12).
Return the orientation of the housing to the same position with reference to the flange
after any servicing to ensure similar performance.
7ML19985FH01
1
2
7
SITRANS LR 400 – INSTRUCTION MANUAL DRAFT
3
4
Electronics section
5
6
1 Housing
2 Cable gland
3 Electronics cover
4 Operating and
monitoring module
5 Threaded ring
6 Process Flange
7 Antenna
8 Intermediate flange
9 Connection cover
Page 3