Contents 1 Preliminary note ���������������������������������������������������������������������������������������������������4 1�1 Symbols used ������������������������������������������������������������������������������������������������4 2 Safety instructions �����������������������������������������������������������������������������������������������4 3 Items supplied������������������������������������������������������������������������������������������������������5 4 Functions and features ����������������������������������������������������������������������������������������5 4�1 Applications ���������������������������������������������������������������������������������������������������5 4�2 Restriction of the application area ����������������������������������������������������������������6 5 Getting started �����������������������������������������������������������������������������������������������������6 5�1 Example configuration �����������������������������������������������������������������������������������7 6 Function ���������������������������������������������������������������������������������������������������������������8 6�1 Measuring principle ���������������������������������������������������������������������������������������8 6�2 Operating principle / features of the unit ��������������������������������������������������������9 6�2�1 Notes on the integrated overflow prevention ����������������������������������������9...
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11�2�3 Set medium [MEdI] ���������������������������������������������������������������������������20 11�2�4 Set overflow prevention [OP] ������������������������������������������������������������20 11�2�5 Adjust the overflow prevention [cOP] ������������������������������������������������21 11�3 Setting the output signals for OUT1 �����������������������������������������������������������22 11�3�1 Setting the output function [ou1] ������������������������������������������������������22 11�3�2 Define switching limits [SP1] / [rp1] (hysteresis function) �����������������22 11�3�3 Define switching limits [FH1] / [FL1] (window function) ��������������������22 11�3�4 Set switch-on delay [dS1] �����������������������������������������������������������������22 11�3�5 Set switch-off delay [dr1]�������������������������������������������������������������������23...
1 Preliminary note Technical data, approvals, accessories and further information at www�ifm�com� 1.1 Symbols used ► Instructions > Reaction or result […] Designation of keys, buttons or indications → Cross-reference Important note Non-compliance may result in malfunction or interference� Information...
• 1 climatic tube (for operation of the unit with aqueous media of temperatures > 35 °C)� The climatic tube restricts the application area of the unit (→ 4.2)� ► In the event of incomplete or damaged items supplied please contact ifm electronic�...
4.2 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 and bulk material, - use in grinders (increased risk of formation of deposits)� •...
5.1 Example configuration Unit: LK1222 (probe length L= 264 mm) Medium to be detected: Mineral oil Installation environment: Metal tank, installation to fig� 5-1 Fig. 5-1 ► Install unit� ► Observe the distances (x), (u) and (c): min� 4�0 cm min�...
6 Function 6.1 Measuring principle The sensor determines the level according to the capacitive measuring principle: • An electrical field [E] is generated Fig. 6-1 and influenced by the medium to be detected� This change to the field causes a measurement signal that is electronically evaluated�...
6.2 Operating principle / features of the unit The unit can be flexibly installed in tanks of different sizes� 2 outputs are available: OUT1 Switching signal for level limit value/IO-Link OUT-OP Switching signal for level limit value (overflow prevention) OUT1 can be freely configured, OUT-OP is fixed to NC and has a fixed hysteresis (a few mm)�...
6.2.2 Display and switching functions The unit displays the current level, selectable in cm or inches� The display unit is defined by parameter setting� The set unit of measurement and the switching status of the outputs are indicated by LEDs� The unit signals via two switching outputs (OUT1, OUT-OP) that a set limit has been exceeded or that the level is below the limit�...
The IODDs necessary for the configuration of the unit, detailed information about process data structure, diagnostic information, parameter addresses and the necessary information about the required IO-Link hardware and software can be found at www�ifm�com�...
6.3 Password protection against inadvertent manipulation As an option, the sensor can be protected by a password against inadvertent manipulation and unauthorised changes� Password on delivery: Not activated! For activation/deactivation (→ 11.4) 7 Installation Fig. 7-1 Probe length u ��� y: Minimum distances Zone for mounting elements Overflow prevention...
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It is permitted to fix the mounting elements within the mounting zone (M) (fig� 7-1)� ► Adhere to the maximum permitted outside length (c) according to table 7-1� ► Observe the minimum distances according to fig� 7-1 and table 7-2� ►...
7.1 Other installation notes • For mounting in plastic pipes/plastic tanks, the inside pipe diameter must at least be 12�0 cm (4�8 inches)� Install sensor in the centre� • For mounting in metal pipes the inside pipe diameter (d) must be at least: Table 7-3 MEdI = CLW�1 MEdI = CLW�2, OIL�1...
8 Electrical connection The unit must be connected by a qualified electrician� The national and international regulations for the installation of electrical equipment must be adhered to� Voltage supply according to EN 50178, SELV, PELV ► Disconnect power� ► Connect the unit as follows: Core colours Black OUT-OP...
9 Operating and display elements 3 4 5 6 Mode/Enter 1 to 8: Indicator LEDs LED 1 Indication in centimetres LED 2 Indication in inches LEDs 3 - 6 Not used LED 7 Switching status OUT-OP (overflow prevention) LED on: No overflow, overflow prevention point OP not reached LED off: Tank is full, overflow prevention point OP is reached LED 8 Switching status OUT1 (on when the output is switched)
10 Menu 10.1 Menu structure 8�0 - - - - 10�0 10�0 9�5 9�5 MEdl CLW�1 0�0 20�4 0�0 donE CodE nonE FOU1 Menu item only visible at factory setting (→ 15)� Menu item only visible if certain parameters have been selected�...
10.2 Password protection If the password protection is activated, the parameter [KEy�C] is displayed upon opening of the menu� Under this parameter, the password can be entered� When the password has been entered, there is full write and read access to all parameters�...
Timeout: If no button is pressed for 30s during programming, the unit returns to the operating mode with unchanged values (exception: cOP)� Locking/unlocking: The unit can be locked electronically to prevent unauthorised setting (factory setting: not locked)� ► Make sure that the unit is in the normal operating mode� To lock the unit: ►...
11.2.3 Set medium [MEdI] ► Select [MEdI] and set the corresponding sensitivity: [CLW�1] = Water, water-based media, coolant emulsions MEdI [CLW�2] = Water, water-based media, coolant emulsions at temperatures > 35 °C (installation in climatic tube)� Restricted application area of the unit with climatic tube (→ 4.2) [OIL�1] = Oils with an increased dielectric constant (e�g�...
11.2.5 Adjust the overflow prevention [cOP] Only adjust the overflow prevention OP when the unit is installed� If possible, carry out the adjustment when the tank is empty� The tank may be partly filled� ► Make sure that the overflow prevention OP is not covered by the medium�...
11.3 Setting the output signals for OUT1 Output OUT-OP (overflow prevention) is fixed to NC [Hnc] for safety reasons� The principle of normally closed operation ensures that wire break or cable break is also detected� 11.3.1 Setting the output function [ou1] ►...
11.3.5 Set switch-off delay [dr1] ► Select [dr1] and set the value between 0�0 and 60 s� In accordance with VDMA, the switch-off delay has an effect on [rP1]� The setting for [ou1] has no significance� 11.3.6 Define switching logic [P-n] ►...
11.4 Changing the password [CodE] The password protects all parameters from unauthorised change� If the password protection is activated, the parameters can still be read, only the write access is blocked� Password on delivery: Not activated! If the password is lost, changing the parameters is no longer possible� In this case, the unit needs to be sent back to the manufacturer! ►...
12.1 Operation indication [----] (continuous) Initialisation phase after power on [numerical value] + Current level in cm LED 1 [numerical value] + Current level in inches LED 2 LED 7 Switching status OUT-OP: • LED on: No overflow (overflow prevention point OP not reached) •...
12.3 Error indications Possible cause Recommended measures [Err] Fault in the electronics ► Replace the unit� • Interfering sources (e�g� EMC) ► Check electrical connection� • Faulty wiring ► Check connection between the [SEnS] • Problems with the supply sensor and the tank ground� voltage Wrong password or error during ►...
OFF for [FOU1] = [OFF] Fault ON for [FOU1] = [On] According to the level Overflow prevention point reached [ou1] setting 13 Technical data Technical data and scale drawing at www�ifm�com 13.1 Setting values [OFS] Table 13-1 [cm] [inch] Setting range 0���200�0 0���78�8...
13.3 Calculation aids [OP] For proper functioning of the overflow prevention OP the minimum distance (y) (fig� 13-1) must be observed (→ 7)� The following applies (fig� 13-1): B: Tank height L: Probe length B + c = L + u c: Outside length (maximum u: Distance between probe and tank →...
13.3.2 Definition "from the bottom" Response level (z) of the overflow prevention OP from the tank bottom is defined� • Without offset ([OFS] = [0]): [OP] = z - u • With offset ([OFS] = u): [OP] = z Example: z = 18�0 cm (from the tank bottom), u = 1�0 cm Without offset: [OP] = 18�0 cm - 1�0 cm = 17�0 cm With offset: [OP] = 18�0 cm...
After a change of the medium with considerably differing dielectric constants (e�g� oil and water): ► Adapt parameter [MEdI] (→ 11.2.3)� 15 Factory setting Factory setting User settings LK1222 LK1223 LK1224 10.0 19.5 19.0 20.4 40.7 MEdI CLW.1 ---- CodE nonE ---- FOU1 More information at www�ifm�com...