Maintenance; Cleaning The Antenna - Siemens sitrans LR 400 Instruction Manual And Users Manual

Maintenance

Cleaning the Antenna

If the antenna is contaminated, any built-up material can be removed using air or soft
brushes. Be careful not to damage the PTFE emitter cone inside the antenna.
An optional purge kit is available from Siemens Milltronics if required. Contact your local
Siemens Millltronics representative for more details.
Solids Version
If the measured material is prone to build-
up, you may need to clean the antenna at
regular intervals to remove buildup that
may affect the measuring result. To
access the antenna, the flange must be
removed.
1. Disconnect the electronics by
turning off the connector waveguide,
located directly above the Easy
Aimer ball.
2. Remove the flange bolts. (position
label)
3. Lift off the process section (including
antenna).
4. Remove four Hex head M5 screws
holding the antenna. (position label)
5. Clean the inside of the antenna with
compressed air or soft brush.
6. Reattach the antenna and tighten the
screws (ensure the screws are
tightened according to the torque
shown opposite). (position label)
7. Insert the process section into the
vessel and fasten the flange bolts.
(position label)
8. Reattach the electronics to the
process section
Page 78 SITRANS LR 400 – INSTRUCTION MANUAL
Graphic
showing
expanded
diagram of LR
400 antenna
labelled with
torque of
appropriate
screws.
7ML19985FH04