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Mounting location
Notes:
• Each SITRANS LG200 is built to match the specific physical specification of the
required installation. Make sure the probe connection is correct for the threaded or
flanged mounting on the vessel or tank where the transmitter will be placed.
• Make sure that the wiring between the power supply and LG200 transmitter is
complete and correct for the type of installation.
WARNING: Do not place insulating material around any part of the
SITRANS LG200 transmitter including the probe flange as this may
cause excessive heat buildup.
Nozzle design (mounting
requirements)
•
Single Rod:
1. Do not mount in nozzles <50 mm (2") in
diameter.
2. Mount in applications where ratio of
diameter:length is 1:1 or greater. Any
ratio less than 1:1 (ie: a 2"x6" nozzle = 1:3)
may require a blocking distance and/or
dielectric adjustment.
3. Do not use pipe reducers.
4. Keep conductive objects away from
probe to ensure proper performance.
•
Twin rod:
1. Active rod must be mounted at least 25 mm (1") away from any obstructions.
2. Minimum stillwell or nozzle diameter for probe is 76 mm (3").
Installation in non-metallic silos
For installation in vessels of a non-metallic construction or possibly open vessels, a
suitable launch plate is required to optimize the impedance of the transmitted signal as it
travels along the probe. Optimal performance cannot be guaranteed if a suitable
transition is not available at the process connection.
When using single rod versions (flexible
or solid) and a threaded process
connection, a metal sheet or flange will
greatly improve conditions as this
provides a suitable launch plate.
A flanged process connection is
generally accepted to be provision of
this launch plate.
1.
Single and Twin Rod probe versions should only be used in metallic vessels or stilling
wells for compliance with CE regulations (where applicable).
Page 28
SITRANS LG200 – INSTRUCTION MANUAL
Correct:
dia.
Incorrect:
1
silo roof (plastic
or wood)
length
metal sheet or
metal flange
7ML19985KA02
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