IFM LW2720 Operating Instructions Manual Download

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Operating instructions

Electronic level sensor

LW2720

11372800 / 00 02 / 2021

Summary of Contents for LW2720

Page 1: ...Operating instructions Electronic level sensor LW2720 11372800 00 02 2021 GB...

Page 2: ...ozzle requirements 16 6 6 Notes for hygienic applications 16 6 6 1 Notes on the use according to EHEDG 16 6 6 2 Notes on the use according to 3 A 17 6 7 Mounting in a threaded connection 17 6 8 Mounti...

Page 3: ...nstable 38 10 1 6 Lagging of measured value during rapid level changes 38 10 1 7 Measured value correct at 0 4 mA but incorrect at 100 20 mA 39 10 1 8 Incorrect measured value when level is above 50 3...

Page 4: ...the unit packaging or at www ifm com 1 1 Symbols used Requirement Instructions Reaction result Designation of keys buttons or indications Cross reference Important note Non compliance may result in ma...

Page 5: ...ta If the operating instructions or the technical data are not adhered to personal injury and or damage to property may occur The manufacturer assumes no liability or warranty for any consequences cau...

Page 6: ...t reduces the risk of leakages and is unaffected by process conditions such as density viscosity temperature pressure and pH The unit combines the innovative 80 GHz technology with the FMCW method and...

Page 7: ...e of comparable attenuating material u Installation must be carried out in accordance with the requirements of the following standard ETSI EN 302 372 TLPR Annex E Use preferably in metal tanks When us...

Page 8: ...rence to the complete operating instructions at www ifm com In addition the following is necessary for installation and operation Mounting material Accessories Only use accessories from ifm electronic...

Page 9: ...rates a very focused signal beam beam angle approx 10 This extends the range of possible applications and enables installation even in small tanks and confined spaces e g in tanks with agitators heati...

Page 10: ...ster 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 possibl...

Page 11: ...unction normally open or normally closed Fig Window function The hysteresis function can be applied in single point mode and in two point mode Functionally both modes are the same only the setting met...

Page 12: ...values For the switching outputs a switch on and switch off delay of max 60 s can be set e g for especially long pump cycles The switch on delay always refers to the limit value the switch off delay...

Page 13: ...e g turbulence wave movements the 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 mea...

Page 14: ...on The unit is a TLPR device TLPR Tank Level Probing Radar equipment are devices for level measurement in a closed space only i e metallic reinforced concrete or fibreglass tanks or similar enclosure...

Page 15: ...om other devices Corrective measures u Apply a shielding screen metal foil between the level sensor and other electrical devices u Additional installation in a metal pipe Consider the beam angle of th...

Page 16: ...sheet are suitable for the media to be detected and the cleaning sanitising processes the installation of the unit is drainable and cleanable that the joint clamping between the unit and the nozzle is...

Page 17: ...akage ports so that they are clearly visible u It is recommended to choose an installation position where the probe and the process connection can be cleaned with a spray ball For use according to 3 A...

Page 18: ...antenna 6 8 2 Place the O ring grease the thread The matching O ring EPDM is supplied with the adapter More O rings are available as accessories u Place the O ring in the groove of the unit u Lightly...

Page 19: ...he unit and adapter using a vice Use suitable vice jaws protectors Do not over tighten the vice as it might damage the adapter 39 mm u Tighten firmly Recommended tightening torque 35 Nm Further tighte...

Page 20: ...ture to over 65 C 149 F w Risk of burns u Let the components of the welding aid and weld in adapter cool down before removal u Hand tighten the weld in adapter on the welding aid u Insert the clamping...

Page 21: ...other Ensure sufficient intervals between the individual sections to avoid glowing through or warping of the adapter due to overheating u Allow the adapter and the welding aid to cool u If used Remov...

Page 22: ...the recommended torque Manufacturer s installation instructions 6 9 2 Mount the unit with pipe fitting u Place a suitable gasket on top of the tank flange u Lower the unit with the mounted adapter for...

Page 23: ...t the bottom of the VARIVENT adapter u Lower the unit with the mounted VARIVENT adapter onto the tank nozzle u Tighten the clamp to the recommended torque Manufacturer s installation instructions 6 9...

Page 24: ...se the O ring may come off due to the missing end stop and enter the process In this case the seal is formed by the rear flat seal 2 non hygienic 39 mm u Make sure that the rear flat seal profiled sea...

Page 25: ...he unit as follows For marine applications if approval available for the device additional surge protection is required L 1 BN 2 WH 4 BK 3 BU OUT1 OUT2 L 4 3 2 1 Pin Core colour 1 BN Brown 2 WH White...

Page 26: ...it to a USB IO Link interface or a field compatible IO Link master Fig 11 Connection via the USB IO Link interface Fig 12 Connection via the IO Link master for field use Before parameter setting famil...

Page 27: ...set Setting range 10 10 m Distance between the zero point and the tank bottom Fig Tank offset Upper blind zone Setting range 0 10 m Serves to suppress false echoes e g from noz zles Fig Upper blind zo...

Page 28: ...VDMA SSC2 Param SP1 Setting range 0 005 15 m Set point 1 for SSC2 switching signal chan nel 2 Only available if SSC2 is not deactivated Set point 1 must be smaller than or equal to the set tank heigh...

Page 29: ...l detection threshold Fig Detection threshold According to VDMA the switch on delay always has an effect on set point 1 e g SSC1 Param SP1 the switch off delay always on the hysteresis or reset point...

Page 30: ...ating coils hopper or dished ends are suppressed w If the level falls below the zero point no error message is issued as long as the level does not also fall below the tank offset Levels within the ta...

Page 31: ...Start simulation Starts the simulation mode The level set under the parameter S Lvl is simulated Stop simulation Stops the simulation Reset to factory settings Restores the factory settings all param...

Page 32: ...he alert mode to zero parameter Alert mode delay time 0 s During a test phase this can be useful to quickly detect incorrect measurements and identify potential sources of error u Reactivate if necess...

Page 33: ...th of the radar echoes It is recommended to check the detection quality under real operating conditions otherwise the expected influences should be taken into account when determining the detection th...

Page 34: ...ired stop the simulation mode If the condition persists restart the device Admissible device temperature exceed ed Electronics temperature out of limits Verify ambient temperature is within the operat...

Page 35: ...tank geometry configuration Recommended actions Verify the tank geometry parameters are configured correctly especially the reference height Analyse the echo peaks and check the detection threshold Re...

Page 36: ...y analysing the echo peaks Measured value gets stuck with decreasing level and full tank A B C D A level B time C actual level D measured level 15 Possible cause Disturbing object near the antenna Rec...

Page 37: ...ing of the upper blind zone Reduce the maximum permissible level e g by adjusting the switch points 10 1 4 Measured value fluctuates A B C A level B time C actual level Possible cause Excessive foamin...

Page 38: ...a suppressed false echo Recommended actions If possible remove the disturbing object or change the device position 10 1 6 Lagging of measured value during rapid level changes A B C D A level B time C...

Page 39: ...t correctly Recommended actions Correct parameter AEP2 10 1 8 Incorrect measured value when level is above 50 A B C D A level B time C actual level D measured level Possible cause Strong multiple refl...

Page 40: ...asurement is lost in an empty tank A B F C D E A level B time C actual level D measured level E level measurement lost F manway door open Possible cause When the manway door is opened inward it genera...

Page 41: ...ank bottom the device enters the alert mode A B C D Fig 17 A level B time C actual level D measured level Possible cause Radar signal is scattered to the side by the sloped tank bottom Recommended act...

Page 42: ...eposits in the long run u Ensure that the connection point between unit and adapter is not soiled or damaged during the cleaning process Check sealing ring s for damage If sealing rings are damaged u...

Page 43: ...nP out1 out2 SSC1 I 4 20 mA dS1 dS2 0 s dr1 dr2 0 s SSCx Param SP1 0 2 m SSCx Param SP2 0 s SSC Confic Logic no SSC Confic Mode Single point SSC Confic Hysteresis 0 05 m ASP2 0 m AEP2 0 2 m FOU2 OFF d...

Page 44: ...ctronic level sensor 44 13 Appendix 13 1 Approvals and certificates The EU declaration of conformity approvals and country specific certificates are available at www ifm com Approval related notes Pac...

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