42
Action against high frequency interference
High frequency interference can occur for example as a result of out-of-phase switching operations.
Should such interference occur and lead to sporadic failures, we recommend the following actions in
order to suppress any interference.
n
Provide inductive loads with RC combinations according to manufacturer's specification to ensure
interference suppression.
n
Make sure that all connecting cables leading to the conductivity electrode or to the conductivity
transmitter are segregated and run separately from power cables.
n
Increase the distance to sources of interference.
n
Check the connection of the screen. Check the screens of the equipment as stipulated in the
respective installation & operating manuals. If equipotential bonding currents are to be expected
(e. g. in outdoor installations) connect screen only at one end.
n
HF interference suppression by means of hinged-shell ferrite rings.
Further Notes
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.
Fig. 12
n
Switch off supply voltage
and
cut off power supply
to the equipment.
n
Remove the lower and upper terminal strips. Unscrew the left and right fixing screws.
Fig. 12
n
Release the white fixing slide at the bottom of the equipment and take the equipment off the
supporting rail.
Decommissioning / replacing the conductivity controller LRR 1-5
Disposal
For the disposal of the equipment observe the pertinent legal regulations concerning waste disposal.
Decommissioning / replacing the operating & display unit URB 50
n
Switch off supply voltage and
cut off power supply
to the equipment.
n
Unplug the connector,
FIg. 10 and 11.
n
Unscrew screws
Fig. 5
and remove fixing elements.
n
Push the equipment out of the control cabinet panel cut-out.
Summary of Contents for LRR 1-52
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