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Summary of Contents for IFM LT39 Series
- Page 1 Operating instructions Electronic sensor for level and temperature LT39xx...
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Page 2: Table Of Contents
LT39xx Electronic sensor for level and temperature Contents Preliminary note ............. Symbols used . - Page 3 Electronic sensor for level and temperature LT39xx 9.6.10 Configuration of the display..........29 9.6.11 Resetting all parameters to factory setting .
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Page 4: Preliminary Note
LT39xx Electronic sensor for level and temperature 1 Preliminary note You will find instructions, technical data, approvals and further information using the QR code on the unit / packaging or at www.ifm.com. 1.1 Symbols used Requirement Instructions Reaction, result [...] Designation of keys, buttons or indications... -
Page 5: Safety Instructions
Electronic sensor for level and temperature LT39xx 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
LT39xx Electronic sensor for level and temperature 3 Intended use 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. The unit monitors 2 process values: level and temperature. -
Page 7: Function
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. 4.1 Features of the unit The unit can be installed in tanks of different sizes. -
Page 8: Operating Modes
LT39xx Electronic sensor for level and temperature 4.4 Operating modes For adjustment to existing application: u Select the required operating mode. • 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. -
Page 9: Analogue Function
Electronic sensor for level and temperature LT39xx u Briefly press [Set]. w Display of the other unit of measurement for 30 s; the respective LED is lit. 4.7 Analogue function The unit provides an analogue signal proportional to the level / temperature. The analogue output (OUT2) can be configured: •... -
Page 10: Level Measurement Without Overflow Prevention
LT39xx Electronic sensor for level and temperature u [OP] = [value ...] (Overflow prevention OP activated!) u [ou2] = [InEG] or [UnEG] I [mA] / U [V] 20 / 10 4 / 0 Fig. 3: OP positioned in the upper segment. I [mA] / U [V] 20 / 10 4 / 0... -
Page 11: Temperature Monitoring
Electronic sensor for level and temperature LT39xx I [mA] / U [V] I [mA] / U [V] 20 / 10 4 / 0 Fig. 5: [ou2] = [I] or [U] I [mA] / U [V] I [mA] / U [V] 20 / 10 4 / 0 Fig. 6: [ou2] = [InEG] or [UnEG] Active zone... -
Page 12: Switching Function
LT39xx Electronic sensor for level and temperature I [mA] I [mA] 20.5 20,5 ASP2 AEP2 T [°C] T [°C] Fig. 7: Maximum measuring range at [ou2] = [I] Fig. 8: Scaled measuring range at [ou2] = [I] MAW: Initial value of the measuring range ASP2: Analogue start point MEW:... -
Page 13: Offset For Indicating The Real Level In The Tank
Electronic sensor for level and temperature LT39xx First the set point (SP1) is set, then the reset point (rP1) with the requested difference. The hysteresis for the overflow prevention OP is fixed. • Window function / normally open: [ou1] = [Fno]. •... -
Page 14: Installation
LT39xx Electronic sensor for level and temperature 5 Installation Probe length u...y: Minimum distances Zone for mounting element Overflow prevention Max. outside length Metal object inside the tank LT3922 LT3923 LT3924 [cm] [cm] [cm] L (rod length) 26.4 47.2 72.8 M (mounting zone) 14.0 23.0 36.0... -
Page 15: Installation Instructions For The Operation Without Overflow Prevention
Electronic sensor for level and temperature LT39xx More information [OP]: Ò calculation aids [OP] 5.2 Installation instructions for the operation without overflow prevention u [MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated!) 5.2.1 Installation in the inactive zone Between the maximum level (b1) and the inactive zone (I1), the minimum distance (a1) has to be adhered to! u Fix the unit using mounting elements in the inactive zone (I1). -
Page 16: Other Installation Notes
LT39xx Electronic sensor for level and temperature u Fix the mounting elements in the mounting zone (M) (Ò Installation). Adhere to the maximum permitted outside length (c) (Ò Table installation). u Ensure that the maximum level (b2) is not exceeded after completed installation: u (b2) = (L) - (c) - (a2) (without offset) u Observe further minimum distances according to the table. - Page 17 Electronic sensor for level and temperature LT39xx u Fit the stainless steel tube clip using pliers. u Ensure a safe fit. u To remove the clip it has to be destroyed.
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Page 18: Electrical Connection
LT39xx Electronic sensor for level and temperature 6 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. Supply voltage SELV, PELV according to the technical data sheet. u Disconnect power. -
Page 19: Operating And Display Elements
Electronic sensor for level and temperature LT39xx 7 Operating and display elements Mode/Enter 1 to 8: Indicator LEDs LED 1 indication in centimetres. LED 2 not used. LED 3 indication in °C. LED 4 – LED 7 not used. LED 8 switching status OUT1 (lights when output 1 is switched) 9: Mode/Enter button •... -
Page 20: Menu
LT39xx Electronic sensor for level and temperature 8 Menu 8.1 Menu structure: 20.0 10.0 19.5 ASP2 AEP2 MEdl OIL.2 20.4 donE Menu items highlighted in grey are active depending on the configuration of the output. - - - - - - - - Hi.T FOU1 FOU2... -
Page 21: Parameter Setting
• Freely definable parameters to identify the units in the plant. Information and documentation on the IO-Link interface at: www.io-link.ifm 9.2 Notes on parameter setting via IO-Link On delivery the unit is not operational. First, the integrated overflow prevention OP has to be adjusted. - Page 22 LT39xx Electronic sensor for level and temperature u Press [Mode/Enter] until the requested parameter is displayed. 2: Set parameter value u Press [SET] and keep it pressed. w Current setting value of the parameter flashes for 5 s. w After 5 s: The Setting value is changed. Incrementally by pressing the button once or continuously by keeping the button pressed.
- Page 23 Electronic sensor for level and temperature LT39xx u Press [Mode/Enter] until [EF] is displayed. u Briefly press [Set]. w The first parameter of the submenu is displayed (here: [rES]). Lock / unlock The unit can be locked electronically to prevent unintentional settings. Locking: u Make sure that the unit is in normal operating mode.
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Page 24: Getting Started
LT39xx Electronic sensor for level and temperature 9.4 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. 9.4.1 Example configuration 1 Unit: LTx922 (probe length L= 264 mm) Medium to be detected: Mineral oil... -
Page 25: Basic Settings
Electronic sensor for level and temperature LT39xx u Install unit. u Observe the distances (x), (u) and (c): u Ground sensor and tank via an electrical connection. u Observe the maximum permitted level (b). u Observe the parameter setting sequence: •... -
Page 26: Set Medium
LT39xx Electronic sensor for level and temperature u Select [OFS]: [OFS] u Set the value for the offset. 9.5.4 Set medium u Select [Medl]: [Medl] u Set sensitivity matching the medium to be detected: [CLW.1] = Water, water-based media, coolant emulsions. [CLW.2] = Water, water-based media, coolant emulsions for temperatures >... -
Page 27: Setting Of Output Signals
Electronic sensor for level and temperature LT39xx u Select [cOP]. [cOP] u Press [SET] and keep it pressed. w [cOP] flashes for some seconds; then the continuous display indicates that the adjustment is being made. w If the adjustment is successful, [donE] is displayed. u Confirm with [Mode/Enter]. -
Page 28: Setting The Switching Limits (Hysteresis Function)
LT39xx Electronic sensor for level and temperature [U] = voltage output 0… 10 V [OU2] [UnEG] = voltage output 10… 0 V 9.6.3 Setting the switching limits (hysteresis function) u Make sure that for [OU1] the function [Hno] or [Hnc] is set. [SP1] u Select [SP1] and set the value at which the output switches. -
Page 29: Configuration Of The Display
Electronic sensor for level and temperature LT39xx 9.6.10 Configuration of the display u Select [diS] and set type of indication: [diS] • [On] = The display is switched on in the operating mode. (Update of the measured values 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 30: Calculation Aids [Op]
LT39xx Electronic sensor for level and temperature LTx922 LTx923 LTx924 [cm] [cm] [cm] 20.4 (1) 40.7 (1) 61 (1) 19.1 38.3 17.9 35.8 16.7 33.4 15.5 31.0 14.3 28.5 13.0 26.1 11.8 23.6 10.6 21.2 18.8 16.3 6.9 (2) 13.9 (2) 20 (2) Fig. 13: OPx: Setting range [OP] The indicated values for [OP] refer to the distance between OP and the lower edge of the probe. -
Page 31: Definition"From The Cover
Electronic sensor for level and temperature LT39xx 9.7.5.1 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 LTx922:... -
Page 32: Operation
LT39xx Electronic sensor for level and temperature 10 Operation After power on, the unit is in the RUN 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 unit operates correctly. 10.1 Operating indicators [---] continuous Initialisation phase after power on... -
Page 33: Error Indications
Electronic sensor for level and temperature LT39xx 10.5 Error indications Indication Possible cause Recommended actions u Replace the unit. [Err] Fault in the electronics. u Check electrical connection. [SEnS] • Interfering sources (e.g. EMC) • Faulty wiring u Check connection between the sensor and the tank ground. -
Page 34: Maintenance, Cleaning, Change Of Medium
LT39xx Electronic sensor for level and temperature 11 Maintenance, cleaning, change of medium When removing or installing the unit for maintenance and cleaning: u Make sure that the stainless steel tube clip is fixed to the sensor. w It must be possible to exactly reproduce the installation height and position. u Remove the sensor and clean it / carry out maintenance u Install sensor exactly in the same position as before. -
Page 35: Disposal
Electronic sensor for level and temperature LT39xx 12 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 36: Factory Setting
LT39xx Electronic sensor for level and temperature 13 Factory setting Factory setting User settings LT3922 LT3923 LT3924 70 (°C) 70 (°C) 70 (°C) 67 (°C) 67 (°C) 67 (°C) ASP2*) 0.0 (°C) 0.0 (°C) 0.0 (°C) AEP2*) 90.0 (°C) 90.0 (°C) 90.0 (°C) MEdI OIL.2...
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