IFM LK122 Series Operating Instructions Manual

IFM LK122 Series Operating Instructions Manual

Electronic level sensor
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Operating instructions
Electronic level sensor
UK
LK122x

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Summary of Contents for IFM LK122 Series

  • Page 1 Operating instructions Electronic level sensor LK122x...
  • Page 2: Table Of Contents

    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...
  • Page 3 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...
  • Page 4: Preliminary Note

    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...
  • Page 5: Items Supplied

    • 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�...
  • Page 6: 4�2 Restriction Of The Application Area

    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)� •...
  • Page 7: 5�1 Example Configuration

    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�...
  • Page 8: Function

    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�...
  • Page 9: 6�2 Operating Principle / Features Of The Unit

    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)�...
  • Page 10: 6�2�2 Display And Switching Functions

    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�...
  • Page 11: 6�2�3 Offset For Indicating The Real Level In The Tank

    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�...
  • Page 12: 6�3 Password Protection Against Inadvertent Manipulation

    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...
  • Page 13 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� ►...
  • Page 14: 7�1 Other Installation Notes

    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...
  • Page 15: Electrical Connection

    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...
  • Page 16: Operating And Display Elements

    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)
  • Page 17: Menu

    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�...
  • Page 18: 10�2 Password Protection

    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�...
  • Page 19: 11�2 Basic Settings

    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: ►...
  • Page 20: 11�2�3 Set Medium [Medi]

    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�...
  • Page 21: 11�2�5 Adjust The Overflow Prevention [Cop]

    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�...
  • Page 22: 11�3 Setting The Output Signals For Out1

    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] ►...
  • Page 23: 11�3�5 Set Switch-Off Delay [Dr1]

    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] ►...
  • Page 24: 11�4 Changing The Password [Code]

    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! ►...
  • Page 25: 12�1 Operation Indication

    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) •...
  • Page 26: 12�3 Error Indications

    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 ►...
  • Page 27: 12�4 Output Response In Different Operating States

    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...
  • Page 28: 13�2 Setting Values

    13.2 Setting values [OP] Table 13-2 LK1222 LK1223 LK1224 [cm] [inch] [cm] [inch] [cm] [inch] 20�4 8�0 40�7 16�0 23�9 19�1 7�5 38�3 15�1 22�4 17�9 7�1 35�8 14�1 21�0 16�7 6�6 33�4 13�1 19�5 15�5 6�1 31�0 12�2 18�1 14�3 5�6 28�5...
  • Page 29: 13�3 Calculation Aids

    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 →...
  • Page 30: 13�3�2 Definition "From The Bottom

    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...
  • Page 31: Maintenance/Cleaning/Change Of Medium

    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...

This manual is also suitable for:

Lk1222Lk1223Lk1224

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