IFM Electronic efector 160, Руководство по эксплуатации

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4
3 Functions and features
The unit monitors collection chambers, basins or systems as well as inspection
chambers and feeder chutes for the leakage of liquids�
3.1 Applications
● Water, hydrous media, oils, coolant emulsions�
3.2 Restriction of the application area
● The unit is not suitable for acids, alkalis, granulates, bulk materials�
● It is not suitable for hygienic areas�
● Highly conductive foam can trigger a switching operation� Check the conse-
quences by performing a test in your application!
● Maximum tank pressure: ± 0�5 bar (when mounted using the appropriate
mounting accessories; → 5.2 Installation procedure).
4 Function
4.1 Measuring principle
The unit operates to the capacitive measuring principle� By direct contact with
the medium the unit detects whether leakage is detected and indicates this by a
switched signal�
Leakage detected output open (OFF)
No leakage detected output closed (ON)
The dielectric constant of a medium is important for its detection� Media with a
dielectric constant > 1�8 are safely detected�
Dielectric constants of common liquids
Mineral oil
≈ 2
Coolant emulsion ≈ 25...75
Glycol ≈ 37
Water ≈ 80
Water, demineralised ≈ 30
Electrically conductive and non conductive media are detected�