IFM Electronic LI2241, LI2242, LI2243 Operating Instructions Manual

Operating instructions
Binary leakage sensor
LI224x
UK
706128 / 00 06 / 2012
Contents
1 Preliminary note � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
1�1 Symbols used� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
2 Safety instructions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
3 Functions and features � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
3�1 Applications � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4 3�2 Restriction of the application area � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
4 Function � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
4�1 Measuring principle � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4 4�2 Features of the unit � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
5 Installation� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
5�1 Installation location / environment � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5 5�2 Mounting� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6 5�3 Set the installation depth � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
6 Electrical connection� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
7 Operating and display elements � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
8 Settings� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
8�1 Set to the empty vessel � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8 8�2 Set to the full vessel � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8 8�3 Lock / unlock the unit � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
9 Operation � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
10 Maintenance, repair, disposal� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
11 Scale drawing � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
12 Technical data� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
Note on approvals to WHG:
The unit described here has been approved to WHG (Federal Water Act, Federal Act applicable in the Federal Republic of Germany)�
For more detailed provisions and information on the approval to WHG please see the German operating instructions�
UK
3
1 Preliminary note
1.1 Symbols used
Instructions > Reaction, result […] Designation of pushbuttons, buttons or indications Cross-reference
Important note Non-compliance can result in malfunction or interference�
Information Supplementary note�
2 Safety instructions
Please read the product description prior to set-up of the unit� Ensure that the product is suitable for your application without any restrictions�
If the operating instructions or the technical data are not adhered to, personal injury and/or damage to property can occur�
Installation, electrical connection, set-up, operation and maintenance of the unit must only be carried out by qualified personnel authorised by the machine operator�
The unit complies with the standard EN 61000-6-4� The unit may cause radio interference in domestic areas� If interference occurs, the user must take ap­propriate remedial actions�
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�
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