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Table of Contents
Related Manuals for IFM Electronic LK31xx
Summary of Contents for IFM Electronic LK31xx
- Page 1 Operating instructions Electronic level sensor LK31xx...
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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 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 ............9... - Page 3 9.1 Menu structure .....................23 10 Parameter setting ....................24 10.1 Parameter setting in general ..............24 10.2 Basic settings ...................25 10.2.1 Set unit of measurement [uni] ............25 10.2.2 Set offset [OFS] ................25 10.2.3 Set medium [MEdI] ................25 10.2.4 Set overflow prevention [OP] ............26 10.2.5 Adjust overflow prevention [cOP] ............26 10.3 Set output signals ..................28 10.3.1 Set output function [ou1] for OUT1 (switching output) ......28...
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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. 2 Safety instructions • Please read this document prior to set-up of the unit. Ensure that the product is suitable for your application without any restrictions. -
Page 5: Functions And Features
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 •... -
Page 6: Getting Started
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 Example configuration 1 Unit: LK3122 (probe length L= 264 mm) Medium to be detected: Mineral oil Operating mode:... -
Page 7: Example Configuration 2
4.2 Example configuration 2 Unit: LK3123 (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. Fig. 4-2 ► Install unit. ► 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 Principle / Features Of The Unit
5.2 Operating principle / features of the unit The unit can be installed in tanks of different sizes. Mounting elements may also be placed in the active measurement zone. Observe the notes on installation. 2 outputs are available. They can be set separately. OUT1 Switching signal for level limit value / IO-Link OUT2... -
Page 10: Notes On The Integrated Overflow Prevention
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. • If the overflow prevention OP is activated, an adjustment to the installation situation has to be made [cOP]. -
Page 11: Analogue Functions
5.4 Analogue functions The unit provides an analogue signal proportional to level. The analogue output (OUT2) can be configured: • [ou2] defines the output function of the analogue output: mA / V (→ 10.3.2). • In case of an internal fault, the output signal reacts according to the parameters set in [FOU2] (→... - Page 12 [OP] = [value ...] (overflow prevention OP activated) [ou2] = [InEG] or [UnEG] Fig. 5-4 Fig. 5-5 OP positioned in the upper segment. OP shifted downward. I [mA] / U [V] I [mA] / U [V] 20 / 10 20 / 10 4 / 0 4 / 0 A: Active zone...
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Page 13: Curve Of The Analogue Signal Without Overflow Prevention
5.4.2 Curve of the analogue signal without overflow prevention [MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated) Fig. 5-6 Fig. 5-7 [ou2] = [I] or [U] [ou2] = [InEG] or [UnEG] I [mA] / U [V] I [mA] / U [V] I [mA] / U [V] I [mA] / U [V] 20 / 10... -
Page 14: Switching Functions
5.5 Switching functions The unit signals via the switching output OUT1 that a set limit value has been exceeded or that the level is below the limit value. Selectable switching functions: • Hysteresis function / normally open (fig. 5-8): [ou1] = [Hno]. •... -
Page 15: Offset For Indicating The Real Level In The Tank
5.6 Offset for indicating the real level in the tank The distance between tank bottom and lower edge of the measuring probe can be entered as offset value [OFS]. So display and switch points refer to the actual level (point of reference = tank bottom). For [OFS] = [0]: The reference point is the lower edge of the measuring probe. -
Page 16: Mounting
6 Mounting Fig. 6-1 Probe length u ... y: Minimum distances Zone for mounting elements Overflow prevention Maximum outside length Metal object inside the tank Table 6-1 LK3122 LK3123 LK3124 [cm] [inch] [cm] [inch] [cm] [inch] L (probe length) 26.4 10.4 47.2 18.6... -
Page 17: Installation Instructions For Operation With Overflow Prevention
6.1 Installation instructions for operation with overflow prevention [MEdI] = [CLW..] or [OIL..] [OP] = [value ...] (overflow prevention OP activated) It is permitted to fix the mounting elements within the mounting zone (M) (fig. 6-1). ► Observe the maximum permitted outside length (c) according to table 6-1. ►... -
Page 18: Installation Instructions For Operation Without Overflow Prevention
6.2 Installation instructions for operation without overflow prevention [MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated) 6.2.1 Installation in the inactive zone Between the maximum level (b1) and the inactive zone (I1), the minimum distance (a1) must be adhered to (fig. 6-2 and table 6-3). ►... -
Page 19: Installation In The Active Zone
6.2.2 Installation in the active zone Between the maximum level (b2) and the mounting element the minimum distance (a2) must be adhered to (fig. 6.3 and table 6-4). ► Fix mounting elements in the mounting Fig. 6-3 zone (M) (fig. 6-1). Adhere to the maximum permitted outside length (c) (table 6-1 ). -
Page 20: Other Installation Notes
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 21: 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 black OUT2... -
Page 22: 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 3 - 7 Not used. LED 8 Switching status OUT1 (lights when output 1 is switched). 9: [Mode/Enter] button - Selection of the parameters and acknowledgement of the parameter values. -
Page 23: Menu
9 Menu 9.1 Menu structure - - - - 20.0 10.0 19.5 MEdl CLW.1 20.4 donE FOU1 FOU2 Menu items highlighted in grey, e.g. [ cOP ], are only active when assigned parameters have been selected. -
Page 24: Parameter Setting
10 Parameter setting 10.1 Parameter setting in general ► Press [Mode/Enter] until the required parameter is displayed. To select parameters in the extended Mode/Enter Set menu (menu level 2): ► Select [EF] and briefly press [Set]. ► Press and hold [Set]. >... -
Page 25: Basic Settings
The unit can be configured before or after installation. Exception: To adjust the overflow prevention [cOP], the unit must be installed in the tank. 10.2 Basic settings Setting ranges of all parameters: → 12 Factory settings of all parameters: → 14 10.2.1 Set unit of measurement [uni] ►... -
Page 26: Set Overflow Prevention [Op]
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. If no oil layer is present (or if it is very thin), the bottom layer is detected. - Page 27 ► Select [cOP]. ► Press [SET] and keep it pressed. > [cOP] flashes for some seconds; then the continuous display indicates that the adjustment is being made. > If the adjustment is successful, [donE] is displayed. ► Confirm with [Mode/Enter]. >...
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Page 28: Set Output Signals
10.3 Set output signals 10.3.1 Set output function [ou1] for OUT1 (switching output) ► Select [ou1] and set the switching function: [Hno] = hysteresis function / normally open [Hnc] = hysteresis function / normally closed [Fno] = window function / normally open [Fnc] = window function / normally closed If the switching output is used as an overflow prevention, the setting [ou1] = [Hnc] (normally closed function) is recommended. -
Page 29: Set Switching Delay [Ds1] For Switching Output
10.3.5 Set switching delay [dS1] for switching output ► Select [dS1] and set the value between 0.0 and 60 s. The switching delay reacts according to VDMA. 10.3.6 Set switch-off delay [dr1] for switching output ► Select [dr1] and set the value between 0.0 and 60 s. The switching delay reacts according to VDMA. -
Page 30: Operation
11 Operation After power on, 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 Table 11-1 [----] (continuous) -
Page 31: Error Indications
11.3 Error indications Table 11-2 Possible cause Recommended measures [Err] Fault in the electronics. ► Replace the unit. • Interfering sources (e.g. EMC) ► Check electrical connection. [SEnS] • Poor cables ► Check connection between the • Supply voltage disturbed sensor and the tank ground. -
Page 32: Technical Data
12 Technical data Technical data and scale drawing at www.ifm.com. 12.1 Setting values [OFS] Table 12-1 [cm] [inch] Setting range 0...200.0 0...78.8 LK3122 LK3122 LK3124 LK3124 LK3123 LK3123 Step increment 12.2 Setting values [OP] Table 12-2 LK3122 LK3123 LK3124 [cm] [inch] [cm] [inch]... -
Page 33: Calculation Aids [Op]
The indicated values for [OP] refer to the distance between OP and the lower edge of the probe. The values apply if [OFS] = [0]. With [OFS] > [0] the values increase by the set OFS value. Example LK3122: According to table 12-2 OP is set to segment 20.4 cm. [OFS] = 7.0 cm [OP] is set to 20.4 cm + 7.0 cm = 27.4 cm. -
Page 34: Definition "From The Bottom
12.3.2 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 35: Maintenance Information For Operation Without Overflow Prevention
13.1 Maintenance information for operation without overflow prevention [MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated) The unit must be reinitialised in the following cases (switch the operating voltage briefly off and on again): • After all maintenance operations. •... -
Page 36: Factory Setting
14 Factory setting Factory setting User setting LK3122 LK3123 LK3124 20.0 39.0 19.5 38.5 20.4 40.7 MEdI CLW.1 ---- ---- FOU1 FOU2 More information at www.ifm.com...