User's Manual

7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 11
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Installation
Installation
Mounting Location
• Do not mount in direct sunlight without the use of a sun shield. Refer to Appendix III
(Ambient/Operating Temperature Specfication) on page 77.
Note:
• The SITRANS LR 400 is rated for Type 4X/NEMA 4X, Type 6/NEMA 6, IP 67.
Follow all installation and operating instructions to meet the requirements
of this type of protection. Use only approved, suitable sized hubs for
watertight applications.
• Observe all maximum permissible ambient and process temperatures.
Refer to Appendix III (Ambient/Operating Temperature Specification).
• Provide a warning sign and/or touch guard if the surface of the measuring
instrument can get hotter than 70°C in use.
Warning: For vessels with conical or parbolic tops, avoid mounting the
unit at the center.
The concavity of the top can focus echoes into the centre,
giving false readings.
Mount the unit more than 1 m away from the vessel walls, pipes and other
assemblies as well as the filling stream because all these influences will become
noticeable as reflective interference. Align the antenna so that the radar cone hits
the surface of the measuring medium as vertically as possible
Flat Coni cal
P a ra b o lic
Conical
Parabolic
Flat
is preferred
location
is acceptable
location
sitranslrd3.book Page 11 Tuesday, October 9, 2001 10:09 AM