IFM LK81 Series Operating Instructions Manual
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IFM LK81 Series Operating Instructions Manual

IFM LK81 Series Operating Instructions Manual

Electronic level sensor
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Operating instructions
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Electronic level sensor
LK81xx

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Summary of Contents for IFM LK81 Series

  • Page 1 Operating instructions Electronic level sensor LK81xx...

  • Page 2: Table Of Contents

    LK81xx Electronic level sensor Contents Preliminary note ............. Symbols used .
  • Page 3 Electronic level sensor LK81xx 10.6 Application examples ........... . 28 10.6.1 Storage tank .

  • Page 4: Preliminary Note

    LK81xx Electronic level sensor 1 Preliminary note You will find instructions, technical data, approvals and further information using the QR code on the unit / packaging or at documentation.ifm.com. 1.1 Symbols used Requirement Instructions Reaction, result [...] Designation of keys, buttons or indications...

  • Page 5: Safety Instructions

    Electronic level sensor LK81xx 2 Safety instructions • The unit described is a subcomponent for integration into a system. – The system architect is responsible for the safety of the system. – The system architect undertakes to perform a risk assessment and to create documentation in accordance with legal and normative requirements to be provided to the operator and user of the system.

  • Page 6: Intended Use

    LK81xx Electronic level sensor 3 Intended use The device 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. 3.1 Restriction of the application area •...

  • Page 7: Getting Started

    Electronic level sensor LK81xx 4 Getting started For fast set-up, the example configurations described in the following can be used for most applications. The indicated minimum distances apply exclusively to each separately described case. 4.1 Configuration example 1 Device: LKx122 (probe length L= 264 mm) Medium to be detected: Mineral oil Operating mode:...
  • Page 8 LK81xx Electronic level sensor u Install device. u Observe the distances (x), (u) and (c): min. 4.0 cm min. 1.0 cm max. 23.0 cm u Ground the sensor with the tank: Electrical connection (Ò / 16) u Observe the maximum permitted level (b). A distance (a2) greater than 5.0 cm has to be observed between maximum level (b) and mounting element.

  • Page 9: Function

    Electronic level sensor LK81xx 5 Function 5.1 Measuring principle The sensor determines the level according to the capacitive measuring principle. • An electrical field [E] is generated and influenced by the medium to be detected. This change to the field causes a measurement signal that is electronically evaluated. •...

  • Page 10: Notes On The Integrated Overflow Prevention

    LK81xx Electronic level sensor For automatic media detection (parameter [MEdI] = [Auto]), no overflow prevention is available! Automatic media detection can only function properly under certain conditions (e.g. compliance with special mounting specifications, restrictions for operation and maintenance): Maintenance information for the operation without overflow prevention (Ò / 33) 5.2.2 Notes on the integrated overflow prevention With the parameter [OP] (OP = overflow prevention), one of the upper measuring segments is defined as integrated overflow prevention OP.

  • Page 11: Offset For Indicating The Real Level In The Tank

    IO-Link is a communication system for connecting intelligent sensors and actuators to automation systems. IO-Link is standardised in the IEC 61131-9 standard. General information on IO-Link at io-link.ifm Input Output Device Description (IODD) with all parameters, process data and detailed descriptions of the device at documentation.ifm.com...

  • Page 12: Installation

    LK81xx Electronic level sensor 6 Installation CAUTION The housing can heat up considerably. w Risk of burns. u Cover the housing to prevent unintentional contact. Fig. 6: Installation Probe length u...y: Minimum distances Zone for mounting element Overflow prevention Maximum outside length Metal objects inside the tank Table installation: LKx022...

  • Page 13: Installation Instructions For The Operation Without Overflow Prevention

    Electronic level sensor LK81xx Table with installation instructions for operation with overflow prevention: MEdI = CLW.1 MEdI = CLW.2, OIL.1 MEdI = OIL.2 [cm] [inch] [cm] [inch] [cm] [inch] y (LKx022) y (LKx023) y (LKx024) Calculation aids for [OP]: Calculation aids [OP] (Ò / 27) 6.2 Installation instructions for the operation without overflow prevention [MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated)

  • Page 14: Installation In The Active Zone A Of The Probe

    LK81xx Electronic level sensor 6.2.2 Installation in the active zone A of the probe Between the maximum level (b2) and the mounting element a minimum distance (a2) has to be observed. Ò Figure and Ò Table  Installation in the active zone A of the probe. u Fix mounting elements in the mounting zone (M) Ò...

  • Page 15: Marking Of The Installation Height

    Electronic level sensor LK81xx Table other installation instructions: MEdI = CLW.1 MEdI = CLW.2, OIL.1 MEdI = OIL.2/ Auto [cm] [inch] [cm] [inch] [cm] [inch] 10.0 6.3.1 Marking of the installation height u Fix the set installation height with the supplied stainless steel tube clip. If the sensor is removed from the fixture for maintenance reasons, the clip serves as a limit stop when remounting the sensor.

  • Page 16: Electrical Connection

    White Brown Blue Green Black Yellow Grey Grey Pink Pink Violet Blue OUT1: switching output / IO-Link OUT2: Switching output OUT3: Switching output OUT4: Switching output Colours to ifm Fig. 10: Circuit examples 4 x positive switching 4 x negative switching...
  • Page 17 Electronic level sensor LK81xx For safe function, the sensor housing must be electrically connected to the counter-electrode / grounded (= functional earth). Use the housing connection (see drawing) and a short piece of cable with a wire cross-section of at least 1.5 mm When using metal tanks, the tank wall serves as the counter- electrode.

  • Page 18: Operating Elements And Display Elements

    LK81xx Electronic level sensor 8 Operating elements and display elements 3 4 5 6 Mode/Enter 1 to 8: Indicator LEDs LED 1 Indication in centimetres. LED 2 Indication in inches LED 3 – 4 Not used. LED 5 Switching status OUT4 (on if output 4 is switched). LED 6 Switching status OUT3 (on if output 3 is switched).

  • Page 19: Menu

    Electronic level sensor LK81xx 9 Menu 9.1 Menu structure - - - - 10.0 10.0 15.0 15.0 14.5 14.5 20.0 20.0 19.5 19.5 FOU1 MEdl FOU2 CLW.1 20.4 FOU3 donE FOU4 Menu items highlighted in grey e.g. [cOP] are only active when assigned parameters have been selected.

  • Page 20: Parameter Setting

    To adjust the overflow prevention [cOP], the device must be installed in the tank. Requirements for parameter setting via the IO-Link interface: ü A suitable parameter setting software, e.g. ifm moneo|configure ü The Input Output Device Description (IODD) for the device, see documentation.ifm.com...

  • Page 21: Parameter Setting In General

    Electronic level sensor LK81xx 10.2 Parameter setting in general CAUTION The housing can heat up considerably. w Risk of burns. u Do not touch the device with your hands. u If necessary, use a blunt object to make settings on the device. 3 steps must be taken for each parameter setting: 1: Select Parameter u Press [Mode/Enter] until the requested parameter is displayed.
  • Page 22 LK81xx Electronic level sensor u Start again with step 1. Finishing the parameter setting: u Press [Mode/Enter] several times until the current measured value is displayed or wait for 30 s. w The sensor returns to the process value display. If [C.Loc] is displayed when an attempt is made to modify a parameter value, a parameter setting process is active via the IO-Link communication (temporary locking).

  • Page 23: Basic Settings

    Electronic level sensor LK81xx uLoc u Press [Mode/Enter] + [Set] simultaneously for 10 s. w [uLoc] is displayed. Timeout: If no button is pressed for 30 s during parameter setting, the unit returns to the operating mode with unchanged values. The unit can be configured before or after installation.

  • Page 24: Setting The Overflow Prevention

    LK81xx Electronic level sensor u In case of doubt, select [OIL.2] for oils. u Check the correct function by performing an application test. The settings [CLW.1] and [CLW.2] suppress deposits (e.g. metal swarf). The settings [OIL.1] and [OIL.2] suppress a bottom layer of higher dielectric water or swarf which is a few cm high.

  • Page 25: Setting Of Output Signals

    Electronic level sensor LK81xx The position of the overflow prevention OP can be determined by calling up the parameter [OP]. Note the offset if necessary. The current level is to be determined manually since the device is not yet ready for operation before the adjustment.

  • Page 26: Setting The Switching Delay

    LK81xx Electronic level sensor 10.4.4 Setting the switching delay u Select [dSx] and set a value between 0.0 and 60 s. [dS1] … The switch-on delay reacts according to VDMA*) [dS4] 10.4.5 Setting the switch-off delay u Select [drx] and a the value between 0.0 and 60 s. [dr1] The switch-off delay reacts according to VDMA*) …...

  • Page 27: Setting Values [Op]

    Electronic level sensor LK81xx 10.5.2 Setting values [OP] Section LKx022 LKx023 LKx024 [cm] [inch] [cm] [inch] [cm] [inch] 20.4 40.7 16.0 23.9 19.1 38.3 15.1 22.4 17.9 35.8 14.1 21.0 16.7 33.4 13.1 19.5 15.5 31.0 12.2 18.1 14.3 28.5 11.2 16.7 Fig. 11: Setting values / OPx: 13.0...

  • Page 28: Definition "From The Cover

    LK81xx Electronic level sensor 10.5.3.1 Definition ”from the cover” Required distance (y) of the overflow prevention OP "from the cover" is defined. • Without offset ([OFS] = [0]): [OP] = L - c - y • With offset ([OFS] = u): [OP] = L - c - y + u [OP] = B - y Example: c = 3.0 cm, y = 5.0 cm, u = 1.0 cm...

  • Page 29: Pumping Station

    Electronic level sensor LK81xx below lower preset value → start refilling. hysteresis function, normally closed (Hnc). below min. value → alarm. Hysteresis function, normally open (Hno). rP1...4 Each slightly below SPx to suppress wave movements. OUT1 OUT2 OUT3 OUT4 Fig. 13: Storage tank •...
  • Page 30 LK81xx Electronic level sensor • If the level is below SP1, the output is switched. If the level is above SP1 or if there is a wire break, output 1 is reset (OFF) (alarm message "overflow / wire break"). • If the level exceeds SP2, output 2 signals (upper value exceeded;...

  • Page 31: Operation

    Electronic level sensor LK81xx 11 Operation After switch-on of the supply voltage, the device is in the operating mode (= normal operating mode). It carries out its measurement and evaluation functions and generates output signals according to the set parameters. u Check whether the device operates correctly. 11.1 Operating indicators [---] continuous Initialisation phase after power on.

  • Page 32: Output Response In Different Operating States

    LK81xx Electronic level sensor 11.4 Output response in different operating states OUT1…4 Initialisation phase Overflow prevention OP not adjusted Overflow prevention OP adjusted or deactivated, normal operation According to the level and [ou1]… [ou4] setting Fault / safe state OFF for [FOUx] = [OFF] ON for [FOUx] = [On]...

  • Page 33: Repair, Maintenance And Disposal

    Electronic level sensor LK81xx 12 Repair, maintenance and disposal u After use, dispose of the unit in an environmentally friendly way in accordance with the applicable national regulations. u For transport only use appropriate packaging to avoid damage of the unit. u In case of return shipment, ensure that the unit is free from soiling, especially from dangerous and toxic substances.

  • Page 34: Factory Setting

    LK81xx Electronic level sensor 13 Factory setting Factory setting User settings LKx022 LKx023 LKx024 12.0 11.5 10.0 19.5 19.0 15.0 29.5 14.5 29.0 20.0 39.0 19.5 38.5 20.4 40.7 MEdI CLW.1 ---- ---- ou1…3 dS1…4 dr1…4 FOU1…4...

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