IFM LK 022 Series User manual

Operating instructions
Electronic level sensor
LK10xx
LK70xx
UK
80264293/ 01 11 / 2018

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Contents
1 Preliminary note...................................................................................................4
1.1 Symbols used ................................................................................................4
2 Safety instructions ...............................................................................................4
3 Functions and features ........................................................................................5
3.1 Application area ............................................................................................5
3.2 Restriction of the application area ................................................................5
4 Getting started .....................................................................................................6
4.1 Example configuration 1 ................................................................................6
4.2 Example configuration 2 ................................................................................7
5 Function...............................................................................................................8
5.1 Measuring principle ......................................................................................8
5.2 Operating principle / features of the unit........................................................8
5.2.1 Operating modes ..................................................................................8
5.2.2 Notes on integrated overflow prevention ..............................................9
5.2.3 Display and switching functions..........................................................10
5.2.4 Offset for indicating the real level in the tank...................................... 11
5.2.5 Defined state in case of a fault ........................................................... 11
5.2.6 IO-Link function .................................................................................. 11
6 Installation..........................................................................................................12
6.1 Installation instructions for operation with overflow prevention ..................13
6.2 Installation instructions for operation without overflow prevention ..............14
6.2.1 Installation in the inactive zone...........................................................14
6.2.2 Installation in the active zone A of the probe ......................................15
6.3 Other installation notes................................................................................16
6.3.1 Marking of the installation height .......................................................16
7 Electrical connection..........................................................................................17
8 Operating and display elements ........................................................................18
9 Menu..................................................................................................................19
9.1 Menu structure.............................................................................................19
10 Parameter setting ............................................................................................20
10.1 Parameter setting in general .....................................................................20
10.2 Basic settings ...........................................................................................21

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10.2.1 Set unit of measurement [uni]...........................................................21
10.2.2 Set offset [OFS] ................................................................................21
10.2.3 Set medium [MEdI] ...........................................................................21
10.2.4 Set overflow prevention [OP]............................................................22
10.2.5 Adjust overflow prevention [cOP]......................................................22
10.3 Set output signals ......................................................................................24
10.3.1 Set output function [oux] for OUTx ..................................................24
10.3.2 Define switching limits [SPx] / [rPx] (hysteresis function) .................24
10.3.3 Define switching limits [FHx] / [FLx] (window function).....................24
10.3.4 Set switching delays [dSx] for the switching outputs ........................24
10.3.5 Set reset delay [drx]..........................................................................25
10.3.6 Define switching logic [P-n] ..............................................................25
10.3.7 Define response of the outputs in case of a fault [FOUx] .................25
10.3.8 Configure display [diS]......................................................................25
10.3.9 Reset all parameters to factory settings [rES] ..................................25
11 Notes on parameter setting via IO-Link ...........................................................26
12 Operation.........................................................................................................27
12.1 Operation indication...................................................................................27
12.2 Read set parameters .................................................................................27
12.3 Error indications.........................................................................................28
12.4 Output response in different operating states............................................28
13 Technical data..................................................................................................29
13.1 Setting values [OFS]..................................................................................29
13.2 Setting values [OP]....................................................................................29
13.3 Calculation aids [OP] .................................................................................30
13.3.1 Definition "from the cover“ ................................................................30
13.3.2 Definition "from the bottom"..............................................................31
13.4 Setting ranges [SPx] / [FHx] and [rPx] / [FLx] ...........................................31
14 Maintenance / cleaning / change of medium ..................................................31
14.1 Maintenance information for operation without overflow prevention .........32
15 Factory setting .................................................................................................33
16 Applications......................................................................................................34
16.1 Hydraulic tank............................................................................................34
16.2 Pumping station.........................................................................................35
16.3 Storage tank ..............................................................................................36

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1 Preliminary note
1.1 Symbols used
►Instructions
> Reaction, result
[…] Designation of keys, buttons or indications
→Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note.
2 Safety instructions
• Read this document before setting up the product and keep it during the entire
service life.
• The product must be suitable for the corresponding applications and environ-
mental conditions without any restrictions.
• Only use the product for its intended purpose
(→ Functions and features).
• Only use the product for permissible media (→ Technical data).
• If the operating instructions or the technical data are not adhered to, personal
injury and/or damage to property may occur.
• The manufacturer assumes no liability or warranty for any consequences
caused by tampering with the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the
product must be carried out by qualified personnel authorised by the machine
operator.
• Protect units and cables against damage.
• 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 actions.

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3 Functions and features
3.1 Application area
The unit was especially designed to meet the requirements of machine tool
building. It is particularly suitable for monitoring coolant emulsions (also dirty) as
well as cutting and hydraulic oils.
3.2 Restriction of the application area
• The unit is not suitable for:
- acids and alkalis
- hygienic and electroplating applications
- highly conductive and adhesive media (e.g. glue, shampoo)
- granulates, bulk material
- use in grinders (increased risk of formation of deposits).
• It is possible that foam of good conductivity is detected as level:
►Check proper function by an application test.
• For water and hydrous media with temperatures > 35 °C, install the unit in a
climatic tube (→ Accessories).
• For automatic medium detection (→ 5.2.1):
For media which are very inhomogeneous, separate from each other thus
forming separation layers (e.g. oil layer on water) the following applies:
►Check proper function by an application test.