IM-P693-02
EMM Issue 2
20
LCR2251 Level Controller
6.2 Action against high-frequency interference
High-frequency interference can be caused by out-of-phase switching operations. If such interference
occurs and results in sporadic failure, we recommend taking the following action to suppress interference:
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Provide inductive loads with RC combinations as per manufacturer's specifications.
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Route the connecting cable to the level transmitter separately from power lines.
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Increase the distance from sources of interference.
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Check the connection of the screen to the central earthing point (CEP) in the control cabinet and
auxilliary equipment.
-
Suppress HF interference using hinged-shell ferrite rings.
6.3 Replacing/taking the equipment out of service
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Switch off the power supply and cut off power to the equipment.
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Remove the upper and lower terminal strips (Fig. 10).
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Insert a screwdriver between the terminal strip and the front frame, to the right and left of the arrow
markings.
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Release the terminal strip on the right and left sides, by turning the screwdriver in the direction of the
arrow.
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Remove the terminal strips.
-
Release the white sliding fixture at the bottom of the housing and take the device off the support rail
Fig. 10
6.4 Disposal
The equipment must be disposed of in accordance with statutory waste disposal provisions.
In the event of faults that cannot be remedied with the aid of this
manual, please contact our Technical Customer Service.
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