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

SITRANS LR 400

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

Structure

housing
connection
cover
intermediate
flange
device tag
The terminals for the power cable and the signal cable are behind the connection cover
on the left side of the housing. The signal cable must be fed in from the right through the
cable glands.
The device can be separated into electronic and mechanical sections at the threaded ring.
An optional temperature extension is positioned between the threaded ring and the
process flange.
The end of the antenna must reach inside the vessel through the vessel nozzle (see
page 17).
After servicing, return the orientation of the housing to its previous position with
reference to the flange, to ensure similar performance.
7ML19985FH03 SITRANS LR 400 – INSTRUCTION MANUAL
cable gland
electronics cover
operating and
monitoring module
optical control
elements
threaded ring
process flange
horn antenna
Page 3