IFM Electronic LR2750 Operating Instructions Manual

IFM Electronic LR2750 Operating Instructions Manual

Electronic level sensor
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Operating instructions
Electronic level sensor
LR2750
UK
UK

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Summary of Contents for IFM Electronic LR2750

  • Page 1 Operating instructions Electronic level sensor LR2750...
  • Page 2: Table Of Contents

    Contents 1 Preliminary note ���������������������������������������������������������������������������������������������������5 1�1 Symbols used ������������������������������������������������������������������������������������������������5 2 Safety instructions �����������������������������������������������������������������������������������������������5 3 Items supplied������������������������������������������������������������������������������������������������������6 4 Getting started �����������������������������������������������������������������������������������������������������6 5 Functions and features ����������������������������������������������������������������������������������������7 5�1 Applications ���������������������������������������������������������������������������������������������������7 5�1�1 Restriction of the application area ��������������������������������������������������������7 6 Function ���������������������������������������������������������������������������������������������������������������8 6�1 Measuring principle ���������������������������������������������������������������������������������������8 6�2 Outputs ����������������������������������������������������������������������������������������������������������8 6�3 Other features of the unit �������������������������������������������������������������������������������9 6�3�1 Display functions ����������������������������������������������������������������������������������9...
  • Page 3 7�3�1 Shorten the probe �������������������������������������������������������������������������������19 7�3�2 Determine probe length ����������������������������������������������������������������������20 7�4 Installation of the unit in the tank �����������������������������������������������������������������20 7�4�1 Installation in open tanks (e�g� for secondary processes) ������������������22 7�4�2 Installation in plastic tanks (e�g� for secondary processes) ����������������22 7�4�3 Notes on the use in accordance with EHEDG ������������������������������������23 7�4�4 Notes on the use according to 3-A �����������������������������������������������������24 8 Electrical connection ������������������������������������������������������������������������������������������25 9 Operating and display elements ������������������������������������������������������������������������26...
  • Page 4 11�6 Changing basic settings �����������������������������������������������������������������������������37 11�6�1 New entering of the rod length ����������������������������������������������������������37 11�6�2 Setting to another medium ����������������������������������������������������������������37 11�7 Simulation ��������������������������������������������������������������������������������������������������37 11�7�1 Set simulation value ��������������������������������������������������������������������������37 11�7�2 Set simulation duration ���������������������������������������������������������������������38 11�7�3 Switch simulation on / off ������������������������������������������������������������������38 12 Operation ���������������������������������������������������������������������������������������������������������38 12�1 Operation with single probe �����������������������������������������������������������������������38 12�2 Operation with a bypass or still pipe (non hygienic) ����������������������������������39 12�3 Function check ������������������������������������������������������������������������������������������39...
  • Page 5: Preliminary Note

    1 Preliminary note 1.1 Symbols used ► Instruction > 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 • The device described is a subcomponent for integration into a system� - The system architect is responsible for the safety of the system�...
  • Page 6: Items Supplied

    • 1 probe (→ Accessories) ► In the event of incomplete or damaged items supplied, please contact ifm electronic� ► Only use accessories from ifm electronic� Available accessories: www�ifm�com The optimum function is not ensured when using components from other manufacturers�...
  • Page 7: Functions And Features

    5 Functions and features The unit continuously detects the level in tanks� 5.1 Applications • Food and hygienic areas (→ 7.4.3) (→ 7.4.4)� • Applications with increased requirements for protection rating and resistance (→ Technical data sheet). The unit complies with the standard EN 61000-6-4 and is a class A product� The unit may cause radio interference in domestic areas�...
  • Page 8: Function

    • When operating with a single probe and small tanks (probe lengths shorter than 200 mm and less than 300 mm distance to the tank wall), interference from the tank (resonances) may occur in rare cases� Corrective measures: (→ 7.1) 6 Function 6.1 Measuring principle Fig.
  • Page 9: 6�3 Other Features Of The Unit

    6.3 Other features of the unit • Hygienic approvals / conformities (→ Technical data sheet) • For CIP / SIP applications (→ Technical data sheet) • Special operating mode for media with increased foam build-up (→ 11.6.2) • Tank adjustment for interference suppression (→ 11.2.2)� •...
  • Page 10 Curve of the analogue signal (factory setting): I [mA] Curve of the analogue signal (measuring range scaled): I [mA] ASP2 AEP2 ① L: level [ou2] = I (factory setting) ② A: active zone = L - (I1 + I2) [ou2] = [InEG] I1: inactive zone 1 ASP2: analogue start point I2: inactive zone 2 (→...
  • Page 11: 6�3�3 Switching Functions

    6.3.3 Switching functions Via switching output OUT1 (factory setting) or additionally via OUT2 (can be set) the unit signals that a set limit level has been reached or that the level is below the limit� The following switching functions can be selected: •...
  • Page 12: 6�3�4 Damping Function

    6.3.4 Damping function With unsteady level (e�g� turbulence, wave movements) display and output response can be damped� During damping the determined level values are "smoothed" by means of a mean filter; the result is a steady curve� Damping can be set by means of the parameter [dAP] (→ 11.4.10)� [dAP] indicates in seconds after what time 63 % of the final value is reached in the event of a sudden jump�...
  • Page 13: 6�3�7 Io-Link

    6.3.7 IO-Link The device has an IO-Link communication interface which requires an IO-Link capable module (IO-Link master)� The IO-Link interface enables direct access to the process and diagnostic data and provides the possibility to set the parameters of the unit during operation� In addition, communication is possible via a point-to-point connection with a USB adapter cable�...
  • Page 14: 7�1�1 Minimum Distances And Connection Piece Diameter

    7.1.1 Minimum distances and connection piece diameter ► Select a connection piece height that is smaller than the connection piece diameter�For applications in hygienic areas: (→ 7.4.3) (→ 7.4.4)� Fig. 7-1 Fig. 7-2 Without adjustment Installation distances with adjustment Installation distances without adjustment (→...
  • Page 15: 7�1�3 Applications With Viscous And Fast Flowing Media

    7.1.3 Applications with viscous and fast flowing media For applications with viscous or flowing media and / or agitators in which the rod is exposed to lateral load: ► Probe must not be in contact with tank Fig. 7-3 wall / structures� ►...
  • Page 16: 7�1�5 Highly Adhesive Medium

    7.1.5 Highly adhesive medium If the medium is highly adhesive, there is the risk that a bridge forms between the probe and the tank wall or structures in the tank� ► Increase minimum distances depending on the adhesion intensity� 7.1.6 Heavy foam build-up and turbulence Heavy foam build-up and turbulence may lead to incorrect measurements�...
  • Page 17: 7�1�7 Notes On Tank Adjustment

    7.1.7 Notes on tank adjustment Tank adjustment reduces the effect of interference and ensures a higher excess gain in difficult application conditions� Carry out the tank adjustment only when the unit is installed� For the tank adjustment it is necessary to enter an "adjustment distance" first� Within this distance, starting from the process connection, interfering reflections are compensated�...
  • Page 18: 7�2 Probe Installation

    Carry out a tank adjustment with empty tank, if possible, to cover any possible interfering sources� In this case: ► Select the max� adjustment distance (L - 250 mm)� If the tank cannot be emptied, adjustment to a partly filled tank is possible� In this case: ►...
  • Page 19: 7�3 Probe Length

    7.3 Probe length 7.3.1 Shorten the probe The probe can be shortened to adapt to different tank heights� For hygienic requirements: Before shortening ensure that the required surface quality can be restored, e�g� by grinding, polishing etc�� Ensure that the probe length is not below the minimum permissible probe length (L ) of 150 mm�...
  • Page 20: 7�3�2 Determine Probe Length

    For secondary processes: In case of high mechanical stress (strong vibration, moving viscous media) it may be necessary to secure the screw connection, e�g� by a screw retaining compound� Substances such as screw retaining compounds may migrate into the medium� ►...
  • Page 21 For welding adapters make sure that the adapter does not warp during the welding process� ► Use welding mandrel E30452� ► The sealing edge must not be damaged by subsequent surface treatment. → Installation instructions of the adapter. If no other installation instructions apply, proceed as follows: ►...
  • Page 22: 7�4�1 Installation In Open Tanks (E�G� For Secondary Processes)

    7.4.1 Installation in open tanks (e.g. for secondary processes) ► For installation in open tanks, use a metal fixture to install the unit� It serves as a launching plate (R); minimum size: 150 x 150 mm for a square fixture, 150 mm diameter for a circular fixture �...
  • Page 23: 7�4�3 Notes On The Use In Accordance With Ehedg

    ► There must be a hole at least 150 mm in diameter in the plastic lid� ► For installation of the unit, a metal flange plate (= launching plate, R) must be used which sufficiently covers the drill hole (→ 12.1) ►...
  • Page 24: 7�4�4 Notes On The Use According

    ► To avoid dead space adhere to the dimensions: L < (D - d)� (1) Leakage port 7.4.4 Notes on the use according to 3-A ► Make sure that the sensor is integrated into the system according to 3-A� ► Use only adapters with 3-A certification and marked with the 3-A symbol →...
  • Page 25: Electrical Connection

    8 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 SELV, PELV� For marine applications (if approval available for the device), additional surge protection is required�...
  • Page 26: Operating And Display Elements

    When operating voltage is applied to the unit for the first time, the probe length must be entered first (→ 11.2.1)� Only then is the unit ready for operation� 9 Operating and display elements 1 to 8: Indicator LEDs LEDs Selected unit of measurement�...
  • Page 27: Menu

    10 Menu 10.1 Menu structure inch Menu items highlighted in grey, e�g� [ SP2 ], are only active when assigned parameters have been selected (→ 10.2.1)� main menu (→ 10.2.1) EF level (→ 10.2.2)
  • Page 28 Menu items highlighted in grey, e�g� [ dS2 ], are only active when assigned parameters have been selected (→ 10.2.3)� III : CFG level (→ 10.2.3) ENV level (→ 10.2.4) SIM level (→ 10.2.5)
  • Page 29: 10�2 Explanation Of The Menu

    10.2 Explanation of the menu 10.2.1 Main menu tREF Carry out a tank adjustment� Menu item only visible if [LEnG] ≥ 260 mm. SP1 / Set point 1 / reset point 1 at which OUT1 switches� Menu item only visible if hysteresis function is selected ([ou1] = [H��])� Upper / lower limit for the acceptable range within which OUT1 switches�...
  • Page 30: 10�2�3 Level Cfg (Configuration)

    10.2.3 Level CFG (configuration) Output configuration for OUT1: switching signal for level limit value� Hysteresis or window function, normally closed or normally open Output configuration for OUT2: • analogue signal for current level, 4…20 mA or 20…4 mA • switching signal for level limit value� Hysteresis or window function, normally closed or normally open Switch-on delay for OUT1 Switch-off delay for OUT1...
  • Page 31: Parameter Setting

    11 Parameter setting During parameter setting the device remains in the operating mode internally� It continues its monitoring functions with the existing parameters until the parameter setting has been completed� 11.1 Parameter setting in general 3 steps must be taken for each parameter setting: Select parameter ►...
  • Page 32 [C�Loc] or [S�Loc] as operation indication see (→ 12.7) • Change from menu level 1 to menu level 2: ► Press [Enter] to get to the menu� ► Press [▲] or [▼] until [EF] is displayed� ► Press [Enter]� > The first parameter of the submenu is displayed (here: [rES])�...
  • Page 33: 11�2 Basic Settings (Set

    11.2 Basic settings (set-up) On delivery of the unit, you must first enter the rod length� The complete user menu then opens� 11.2.1 Enter probe length ► Apply operating voltage� > The initial display is shown� ► Press [Enter] and select [LEnG]� ►...
  • Page 34: 11�3 Configure Display (Optional)

    11.3 Configure display (optional) ► Select [uni] and set the unit of measurement: [mm], [inch]� ► Select [SELd] and set type of indication: [L] = The level is indicated in mm or inch� [%] = The level is indicated in percent� The displayed level in % depends on the parameters: ASP2 = set value corresponds to 0 % AEP2 = set value corresponds to 100 %...
  • Page 35: 11�4�3 Set The Switching Limits (Window Function)

    11.4.3 Set the switching limits (window function) ► Make sure that for [oux] the function [Fno] or [Fnc] is set� ► Select [FHx] and set the upper limit of the acceptable range� ► Select [FLx] and set the lower limit of the acceptable range� [FLx] is always lower than [FHx]�...
  • Page 36: 11�4�7 Scale Analogue Signal

    11.4.7 Scale analogue signal ► Select [ASP2] and set the analogue start point� ► Select [AEP2] and set the analogue end point� Setting these parameters via IO-Link is only possible if parameter [ou2] = [I] or [InEG]� More information: (→ 6.3.2) 11.4.8 Set output logic for the switching outputs ►...
  • Page 37: 11�6 Changing Basic Settings

    11.6 Changing basic settings Required after changes to the probe or application� 11.6.1 New entering of the rod length ► Select [LEnG]� ► Enter the probe length L� Note the set unit [uni]� ► Press [Enter]� Note: After changing the probe length, the values for the switching limits must also be reviewed / re-entered�...
  • Page 38: 11�7�2 Set Simulation Duration

    11.7.2 Set simulation duration ► Select [STim] ► Set time span for simulation� ► Press [Enter]� Setting range: 1, 2, 3, 4, 5, 10, 15, 20, 30, 45, 60 min� Factory setting: 3 min 11.7.3 Switch simulation on / off ►...
  • Page 39: 12�2 Operation With A Bypass Or Still Pipe (Non Hygienic)

    12.2 Operation with a bypass or still pipe (non hygienic) In certain applications it is recommended to use a bypass or still pipe, e�g� in case of heavy foam build-up (→ 7.1.6)� Minimum internal pipe diameter: (→ 7.1.2) General installation instructions: (→ 7.1) 12.3 Function check After power-on the device is in the operating mode�...
  • Page 40: 12�5 Read Set Parameters

    12.5 Read set parameters ► Briefly press [Enter] to open the menu ► [▲] or [▼] scrolls through the parameters. ► Briefly press [Enter] to indicate the corresponding parameter value for about 30 s� Then the unit returns to the process value display� 12.6 Change between length display and percentage Length display: mm or inch (→...
  • Page 41: 12�8 Output Response In Different Operating States

    12.8 Output response in different operating states OUT1 OUT2* Initialisation according to the level and according to the level 4���20 Normal operation [ou1] setting OFF for [FOU1] = OFF; < 3�6 mA at [FOU2] = OFF Fault ON for [FOU1] = On >...
  • Page 42: Maintenance / Transport

    The setting ranges for analogue start point [ASP2] and analogue end point [AEP2] depend on the probe length (L)� In general the following applies: inches [ASP2] [AEP2] L - 30 L - 1�2 Step increment 0�05 • Minimum distance between [ASP2] and [AEP2] = 20 % of the active zone� 14 Maintenance / Transport ►...
  • Page 43: 14�2 Change Of Medium, Change Of Units

    Before installing and removing the unit: Make sure that no pressure is applied to the system and that there is no medium in the tank that could leak� Also always take into account the potential dangers related to extreme machine and medium temperatures� ►...
  • Page 44: Factory Setting

    15 Factory setting Factory setting User setting tREF nonE 50% VMR* 5 mm below SP1 ASP2 0% VMR* AEP2 100% VMR* FOU1 FOU2 SELd LEnG nonE MEdl S.LVL 50 % LEnG S.Tim S.On * VMR = final value of the measuring range = LEnG value minus 30 (in millimetres)� When the LEnG value is entered, the unit calculates the basic setting�...
  • Page 45: Notes On Parameter Setting Via Io-Link

    16 Notes on parameter setting via IO-Link On delivery the unit is not operational� During set-up, valid basic settings have to be sent to the device once even if the default settings correspond to the connected device� Make sure that the basic settings are entered correctly according to the attached probe and the medium to be detected�...
  • Page 46: 16�2 Unit Locking / Data Storage

    Only if data storage is required in an IO-Link application: The tank adjustment is not saved via IO-Link� After a unit has failed it must be carried out again�Only when the tank adjustment has been carried out successfully does the unit revert to the cyclical process data transmission�...
  • Page 47 More information at www�ifm�com...

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