Contents 1 Preliminary note ���������������������������������������������������������������������������������������������������4 1�1 Symbols used ������������������������������������������������������������������������������������������������4 2 Safety instructions �����������������������������������������������������������������������������������������������5 3 Functions and features ����������������������������������������������������������������������������������������6 3�1 Application area ��������������������������������������������������������������������������������������������6 3�2 Restriction of the application area ����������������������������������������������������������������6 4 Getting started �����������������������������������������������������������������������������������������������������6 4�1 Example configuration 1 ��������������������������������������������������������������������������������7 4�2 Example configuration 2 ��������������������������������������������������������������������������������8 5 Function ���������������������������������������������������������������������������������������������������������������9 5�1 Measuring principle level �������������������������������������������������������������������������������9 5�2 Measuring principle temperature �����������������������������������������������������������������10...
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10 Parameter setting ��������������������������������������������������������������������������������������������24 10�1 Parameter setting in general ���������������������������������������������������������������������24 10�2 Basic settings �������������������������������������������������������������������������������������������25 10�2�1 Assign process values to the outputs [SEL3] / [SEL4] ����������������������25 10�2�2 Assign process value to the display [SELd] ��������������������������������������25 10�2�3 Define unit of measurement for level [uni�L] �������������������������������������26 10�2�4 Set the unit of measurement for the temperature [uni�T] ������������������26 10�2�5 Set the offset [OFS] ��������������������������������������������������������������������������26 10�2�6 Set the medium [MEdI] ���������������������������������������������������������������������26...
13�5�2 Definition "from the bottom“ ��������������������������������������������������������������36 14 Maintenance / cleaning / change of medium ��������������������������������������������������37 14�1 Maintenance information for operation without overflow prevention ���������37 15 Factory setting �������������������������������������������������������������������������������������������������38 16 Applications������������������������������������������������������������������������������������������������������39 16�1 Storage tank ����������������������������������������������������������������������������������������������39 16�2 Pumping station �����������������������������������������������������������������������������������������40 1 Preliminary note 1.1 Symbols used ►...
2 Safety instructions • The device described is a subcomponent for integration into a system� - The manufacturer of the system is responsible for the safety of the system� - The system manufacturer undertakes to perform a risk assessment and to create a documentation in accordance with legal and normative requirements to be provided to the operator and user of the system�...
3 Functions and features 3.1 Application area 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� The unit monitors 2 process values: level and temperature� 3.2 Restriction of the application area •...
4.1 Example configuration 1 Unit LT8022 (probe length L= 264 mm) Medium to be detected Mineral oil Operating mode Manual media selection with overflow prevention (Factory setting → 5.3.1 Installation environment Metal tank, installation to Fig� 4-1 Fig. 4-1 ► Install unit� ►...
4.2 Example configuration 2 Unit LT8023 (probe length L= 472 mm) Medium to be detected Coolant emulsion Operating mode Automatic medium detection (→ 5.3.1) Installation environment Metal tank, installation to Fig� 4-2� ► Install unit� Fig. 4-2 ► Observe the distances (x), (u) and (c): min�...
5 Function 5.1 Measuring principle level 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�...
5.2 Measuring principle temperature The temperature is detected by a Pt element at the lower end of the probe and electronically evaluated� • Media without water content (e�g� oils) are directly (in contact with the medium) detected� • Hydrous media can also be directly detected up to temperatures of 35 °C� For temperatures >...
5.3.1 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.
5.3.2 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� • If the overflow prevention OP is activated, an adjustment to the installation situation has to be made [cOP]�...
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The unit signals via four switching outputs that set limits have been exceeded or that the level is below the limit� • Outputs OUT1 / OUT2 are assigned to the process value level� • Outputs OUT3 / OUT4 are freely programmable: Parameter [SEL3] / [SEL4] assigns the process value, level / temperature, to the outputs OUT3 / OUT4 (→...
5.3.4 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) For [OFS] = [0]: The reference point is the lower edge of the measuring probe�...
6 Mounting CAUTION! The surface of the unit may get hot if the switching outputs are operated at maximum load� > Risk of burns ► Do not touch the unit ► Protect the housing against contact with flammable substances and unintentional contact� Fig.
6.1 Notes on 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� ►...
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), minimum distance (a1) must be adhered to (see Fig� 6-2 and Table 6-3)� ►...
6.2.2 Installation in the active zone of the probe The minimum distance (a2) must be observed between the maximum level (b2) and the mounting element (a2) (Fig� 6�3 and Table 6-4)� ► Fix mounting elements in the mounting Fig. 6-3 zone (M) (fig�...
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�...
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...
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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�...
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 LED 3 Indication in °C LED 4 Indication in °F LED 5 Switching status OUT4 (lights when output 4 is switched) LED 6 Switching status OUT3 (lights when output 3 is switched) LED 7...
10 Parameter setting CAUTION! The surface of the unit may get hot if the switching outputs are operated at maximum load� > Risk of burns ► Do not touch the unit ► Use another object (e�g� a ballpoint pen) to carry out settings on the unit�...
Timeout: If no button is pressed for 30 s 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)� ►...
10.2.3 Define unit of measurement for level [uni.L] ► Enter [uni�L] before the limits for level are entered� This avoids unintentional maladjustments� ► Select [uni�L] ► Define unit of measurement for the level: uni.L [cm] = level in cm [inch] = level in inches 10.2.4 Set the unit of measurement for the temperature [uni.T] ►...
► In case of doubt, select [OIL�2] for oils� ► Test proper functioning in 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� If no oil layer is present (or if it is very thin), the bottom layer is detected�...
10.2.8 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�...
With deactivated overflow prevention [MEdI] = [Auto] or [OP] = [OFF] it is necessary for the unit for applying the basic settings and adaptation to the medium and installation environment: 1� to be installed in the application� 2� to be reinitialised� ►...
10.3.3 Define switching limits [FHx] / [FLx] (window function) ► Make sure that for [oux] the function [Fno] or [Fnc] is set� ► Set [FHx] first, then [FLx]� ► Select [FHx] and set the upper limit of the acceptable range� ►...
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�...
12 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� 12.1 Operating indicators [----] (continuous) Initialisation phase after power on�...
12.3 Read / reset extreme value memory temperature ► Select parameter [Lo�T] or [Hi�T] ► Briefly press [Set] for reading� > Device displays the stored maximum or minimum value for 30 s� ► To delete the memory keep [Set] pressed until [----] is displayed� ►...
12.6 Output response in different operating states Table 11-1 OUT1/2 OUT3/4 Initialisation phase According to process Overflow prevention OP not adjusted value and setting [oux] Overflow prevention OP adjusted or According to process value and setting [oux] deactivated, normal operation Fault According to setting [FOUx] 13 Technical data...
13.5 Calculation aids [OP] For proper functioning of the overflow prevention OP a minimum distance (y) (Fig� 12-1) must be observed (→ 6.1)� The following applies (Fig� 12-1): B: tank height L: probe length B + c = L + u c: outside length (maximal (→...
14 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� ►...
16 Applications 16.1 Storage tank Level control and min / max monitoring with 4 switching outputs (No temperature monitoring; [SEL3] and [SEL4] = [LEVL]) Replaces 4 float switches Configuration of the switching outputs 1���4 Maximum value exceeded → alarm. Hysteresis function, normally closed (Hnc)� Upper preset value exceeded →...
• 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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OUT1 OUT2 OUT3 • 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 exceeds SP2, output 2 switches (upper value exceeded; submersible pump ON)�...
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