Table of Contents
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Table of Contents
Related Manuals for IFM Electronic LK8122
Summary of Contents for IFM Electronic LK8122
- Page 1 Operating instructions Electronic level sensor LK81xx...
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Page 2: Table Of Contents
Contents 1 Preliminary note ....................4 1.1 Symbols used ....................4 2 Safety instructions ....................4 3 Functions and features ..................5 3.1 Applications ....................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... - Page 3 10.2.1 Setting the unit of measurement [uni] ..........23 10.2.2 Set the offset [OFS] ................23 10.2.3 Set the medium [MEdI] ..............24 10.2.4 Set the overflow prevention [OP] ............24 10.2.5 Adjust the overflow prevention [cOP] ..........25 10.3 Setting of output signals ................26 10.3.1 Set output function [oux] for OUTx ..........26 10.3.2 Define the switching limits [SPx] / [rPx] (hysteresis function) ...26 10.3.3 Define switching limits [FHx] / [FLx] (window function) .....27...
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Page 4: Preliminary Note
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. CAUTION Warning of personal injury. Slight reversible injuries may result. 2 Safety instructions •... -
Page 5: Functions And Features
3 Functions and features 3.1 Applications The unit was especially designed to meet the requirements of machine tool building. It is especially suitable for monitoring coolant emulsions (also dirty) as well as cutting and hydraulic oils. 3.2 Restriction of the application area •... -
Page 6: 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 Example configuration 1 Unit LK8122 (probe length L= 264 mm) Medium to be detected Mineral oil Operating mode Manual media selection with overflow prevention (Factory setting) →... -
Page 7: Example Configuration 2
4.2 Example configuration 2 Unit LK8123 (probe length L= 472 mm) Medium to be detected Coolant emulsion Operating mode Automatic medium detection (→ 5.2.1) Installation environment Metal tank, installation to Fig. 4-2 ► Install unit. Fig. 4-2 ► Observe the distances (x), (u) and (c): min. -
Page 8: Function
5 Function 5.1 Measuring principle The sensor determines the level according to the capacitive measuring principle: • An electrical field [E] is generated Fig. 5-1 and influenced by the medium to be detected. This change to the field causes a measurement signal that is electronically evaluated. -
Page 9: Operating Modes
5.2.1 Operating modes 1. Manual media selection with overflow prevention (factory setting) Recommended. Highest operational reliability The medium to be detected is set manually [MEdI]. In addition, an integrated, independently functioning overflow prevention is available. 2. Manual media selection without overflow prevention Medium operational reliability The medium to be detected is set manually as described under 1. -
Page 10: Display And Switching Functions
output has not switched even though the corresponding switch point has been exceeded (e.g. due to application-related malfunctions). • Typically the overflow prevention OP reacts when the selected measuring segment has been reached (a few mm before the set OP value). •... -
Page 11: Offset For Indicating The Real Level In The Tank
Fig. 5-2 Fig. 5-3 Level Hysteresis Window 5.2.4 Offset for indicating the real level in the tank The distance between tank bottom and lower edge of the probe can be entered as offset value [OFS]. So display and switch points refer to the actual level (point of reference = tank bottom). - Page 12 In addition communication is possible via a point-to-point connection with a USB adapter cable. 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.
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Page 13: Installation
► Cover to prevent accidental injury. Fig. 6-1 Probe length u ... y: Minimum distances Zone for mounting elements Overflow prevention Maximum extension length Metal object inside the tank Table 6-1 LK8122 LK8123 LK8124 [cm] [inch] [cm] [inch] [cm] [inch] L (rod length) 26.4... -
Page 14: Notes On Installation Instructions For Operation With Overflow Prevention
The minimum distance is measured between lower edge mounting element and OP value. Table 6-2 MEdI = CLW.1 MEdI = CLW.2, OIL.1 MEdI = OIL.2 [cm] [inch] [cm] [inch] [cm] [inch] y (LK8122) y (LK8123) y (LK8124) Calculation aids for [OP]: → 12.3... -
Page 15: Installation Instructions For Operation Without Overflow Prevention
Minimum distance between the inactive zone (I1) and the maximum level (b) Max. level from the lower edge of the sensor (without offset) Max. permitted outside length (observe footnote Table 6-1) Table 6-3 LK8122 LK8123 LK8124 [cm] [inch] [cm] [inch] [cm] [inch] 10.4... -
Page 16: Installation In The Active Zone
(b). Max. level from the lower edge of the sensor. Table 6-4 MEdI = CLW.1 MEdI = CLW.2, OIL.1 MEdI = OIL.2 / Auto [cm] [inch] [cm] [inch] [cm] [inch] a2 (LK8122) a2 (LK8123) a2 (LK8124) → Fig. 6-1. -
Page 17: Further Notes On Installation / Accessories
In case of automatic medium detection [MEdI] = [Auto] or deactivated overflow prevention [OP] = [OFF], the sensor reinitialises itself each time it is switched on and makes adjustments to the medium and the installation environment. The active zone / measuring range must not be completely covered by the medium. -
Page 18: Electrical Connection
7 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 Socket DIN 47100... - Page 19 For safe function, the sensor housing must be electrically connected to the counter-electrode (grounding). ► Use the housing connection (see drawing) and a short piece of cable with a wire cross section of min. 1.5 mm When using metal tanks, the tank wall serves as the machine earth.
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Page 20: Operating And Display Elements
8 Operating and display elements 3 4 5 6 Mode/Enter 1 to 8: Indicator LEDs LED 1 Indication in cm LED 2 Indication in inches LEDS Not used 3...4 LED 5 Switching status OUT4 (lights when output 4 is switched) LED 6 Switching status OUT3 (lights when output 3 is switched) LED 7... -
Page 21: Menu
9 Menu 9.1 Menu - - - - 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 22: Parameter Setting
10 Parameter setting CAUTION The housing can heat up considerably. > Risk of burns. Do not touch the device with your hands. ► Use another object (e.g. a ballpoint pen) to carry out settings on the unit. 10.1 Parameter setting in general ►... -
Page 23: Basic Settings
► Make sure that the unit is in the normal operating mode. To lock the unit: ► Press both buttons simultaneously for 10 s. > [Loc] is displayed. For unlocking: ► Press both buttons simultaneously for 10 s. > [uLoc] is displayed. The unit can be configured before or after installation. -
Page 24: Set The Medium [Medi]
10.2.3 Set the medium [MEdI] ► Select [MEdI] and set the corresponding sensitivity: [CLW.1] = water, hydrous media, coolant emulsions. MEdI [CLW.2] = water, hydrous media, coolant emulsion for temperatures > 35 °C (installation in climatic tube). [OIL.1] = oils with an increased dielectric constant (e.g. some synthetic oils). -
Page 25: Adjust The Overflow Prevention [Cop]
> If the adjustment is not successful, [FAIL] is displayed. ► If necessary, lower the level or correct the position of the overflow prevention [OP] and repeat the adjustment operation. Minimum distance between the overflow prevention OP and the level during adjustment: Table 10-1 [cm] [inch] LK8122 LK8123 LK8124... -
Page 26: Setting Of Output Signals
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 unit is not yet ready for operation before the adjustment. When the overflow prevention is activated ([OP] = [value ...]), an adjustment [cOP] must be carried out each time: •... -
Page 27: Define Switching Limits [Fhx] / [Flx] (Window Function)
[rPx] is always smaller than [SPx]. The unit only accepts values which are lower than the value for [SPx]. If [SPx] is shifted, [rPx] also shifts provided that the lower end of the setting range is not reached. 10.3.3 Define switching limits [FHx] / [FLx] (window function) ►... -
Page 28: Configure Display [Dis]
10.3.8 Configure display [diS] ► Select [diS] and set value: [On] = The display is switched on in the operating mode. Update of the measured values every 500 ms [OFF] = The display is switched off in the operating mode. When one of the buttons is pressed, the current measured value is displayed for 30 s. -
Page 29: Operation
11 Operation After switch-on of the operating voltage, the unit 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. ► Check whether the unit operates correctly. 11.1 Operating indicators [----] (continuous) Initialisation phase after power on. -
Page 30: Error Indications
11.3 Error indications Possible cause Recommended measures [Err] Fault in the electronics. ► Replace the unit. • Interfering sources (e.g. EMC) ► Check electrical connection. • Poor cables [SEnS] ► Check the connection between the • Problems with the supply sensor and the tank ground. -
Page 31: Setting Values [Ofs]
The values apply if [OFS] = [0]. If [OFS] > [0], they increase by the set offset value. Example LK8122: According to Table 12-2 OP has to be set to segment 20.4 cm. [OFS] = 7.0 cm... -
Page 32: Calculation Aids [Op]
• With offset ([OFS] = u): [OP] = L - c - y + u [OP] = B - y Example LK8122: c = 3.0 cm, y = 5.0 cm, u = 1.0 cm Without offset: [OP] = 26.4 cm - 3.0 cm - 5.0 cm = 18.4 cm... -
Page 33: Setting Ranges [Spx] / [Fhx] And [Rpx] / [Flx]
12.4 Setting ranges [SPx] / [FHx] and [rPx] / [FLx] Table 12-3 LK8122 LK8123 LK8124 [cm] [inch] [cm] [inch] [cm] [inch] [SPx] / [FHx] 2.5...20.0 1.0...8.0 3.5...39.0 1.4...15.4 6...59 2.5...23.5 [rPx] / [FLx] 2.0...19.5 0.8...7.8 3.0...38.5 1.2...15.2 5...58 2.0...23.0 Step increment The values apply if [OFS] = [0]. -
Page 34: Maintenance / Cleaning / Change Of Medium
13 Maintenance / cleaning / change of medium When removing or installing the unit for maintenance and cleaning work: ► Make sure that the stainless steel tube clip is fixed to the sensor. > It must be possible to exactly reproduce the installation height and position. ►... -
Page 35: Factory Setting
14 Factory setting Factory setting User setting LK8122 LK8123 LK8124 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... -
Page 36: Applications
15 Applications 15.1 Storage tank Level control and min / max monitoring with 4 switching outputs Replaces 4 float switches Configuration of the switching outputs 1...4 Maximum value exceeded → alarm. Hysteresis function, normally closed (Hnc). Upper preset value exceeded → finish refilling. Hysteresis function, normally open (Hno). - Page 37 • 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 switches OFF (alarm message "overflow / wire break“). • If the level reaches SP2, output 2 switches (upper preset value reached; finish refilling).
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Page 38: Pumping Station
15.2 Pumping station Empty the tank / overflow prevention with 3 switching outputs Replaces 3 float switches Configuration of the switching outputs 1...3 Maximum value exceeded → alarm. Hysteresis function, normally closed (Hnc). Upper value exceeded → submersible pump ON. Hysteresis function, normally open (Hno). - Page 39 More information at www.ifm.com...