LORENZ MESSTECHNIK GmbH
Contents
1. 9 5 4 Shielding Connection uiii etre paste ren detener nne Lo datae e Un grenier ta een ert 9 5 5 Running of Measuring Cables nennen nnns tetris etre enne 9 5 6 Angle Optin sitina unninn nnna e aaan aana a aa E akasia abai ianei 9 6 MCASUMNG A E E I E A A E A A N E 10 6 1 ENGAGING nl 10 6 2 Directi rr of FOrqUO iieusce ice ee eaten ie EEEE RAEE ETAN aL Ye bea Du ge ESE E 10 6 3 Static Quasi Static Torques cccccecceceeeceeeneeeeeeeeceneeeeaeeeeeaeeceaeeeeaaeeseaeeeeaaeeseaeesaaeesseaeeesneeeeeaeess 10 6 4 Dynamic TOrques 2 esee tegis cet easac etaed Dx usas Md agde AEEA d Te bea Du EASE Rx Ee ete 10 6 4 1 Cruce 2 10 6 4 2 Natural ROSOMANCES ossasuna Meee ie tere teure gebe ped ue tu Exe SER pa zie Du ERE Ge ERR pa e Du Ra gr ek pe 10 6 5 Speed Limits eet e ex p be ient ne elder x eE eta 10 66 Bist rbance Variables pite tole nerui resi aste user d Pera uaus 10 T cnc vm 11 7 1 Maintenance Schedule ssssssssssssssssesesee enne ener nn nenne aida EARE iaaa nennen 11 72 WROUDIE SMOOUING esses sass eR 11 8 IDECOMMISSION sassigse EE 11 9 Transportation and Storage ete tte a aa a ace Eaa ea aaaea Eida EREE EAE E 12 9r Hans ponali LEES 12 e E o 0 gt E E A T E T 12 10 Bea e EE E E A E MUI E E E E A E a ET 12 11 CANA A A E E E E A E A E A A E E E M 12 11 1 Pro2. ng E Excitation GND Voltage below 2 8 V will disable the calibration control Calibration control Cal control Schirm Geh use Shield 5 gr n green G braun brown grau grey T Uka 3 5 VDC lt Uka lt 28 VDC Exc GND Connection example for 8 pin connector 5 2 2 Calibration Control at RS485 The switch on of calibration control is carried out by a command For this see command SCMD_WriteFullStroke from Lorenz protocol document no 090110 5 3 Cable Only use a shielded cable with preferably small capacity We recommend measuring cables from our product range They have been tested in combination with our sensors and meet the metrological requirements 5 4 Shielding Connection In combination with the sensor and the external electronics the shield forms a Faraday Cage By this electro magnetic disturbances do not have any influence on the measurement signal 5 5 Running of Measuring Cables Do not run measuring cables together with control or heavy current cables Always assure that a large distance is kept to engines transformers and contactors because their stray fields can lead to interferences of the measuring signals If troubles occur through the measuring cable we recommend to run the cable in a grounded steel conduit 5 6 Angle Option At angle or speed measurement the pulses revolutions Impulse Evaluation with a second are acquired
3. the supplier as well as the operator must plan realize and take responsibility for safety related interests for the sensor Remaining dangers must be minimized Remaining dangers of the torque measurement technique must be pointed out Human mistakes must be considered The construction of the plant must be suitable for the avoidance of dangers A danger analysis for the plant must be carried out 1 4 Reconstructions and Modifications Each modification of the sensors without our written approval excludes liability on our part 1 5 Personnel The installation assembly commissioning operation and the disassembly must be carried out by qualified personnel only The personnel must have the knowledge and make use of the legal regulations and safety instructions E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 4 of 12 D LORENZ MESSTECHNIK GmbH 3555 Aion favorire ranae 1 6 Warning Notes Attention must be paid to the accident prevention regulations of the trade associations Coverings and casings are necessary before operating the sensor This is also valid for commissioning maintenance and trouble shooting Duties of the coverings and casings are Protection from detaching parts Protection from contusion and shear Prevention from reaching rotating parts Prevention from being tangled up and or getting caught by parts Coverings may gt Not grind Notrota
4. 5 2 2 Definition of the Pictograms on the Torque Sensor ccccccceeeeeeeeeeeeeeeeeeeaeeeeneeeeeaeeseeeeseaeeseaeees 5 3 Product DescrIptIOrt eee eee Lure tete de xe ne ed adie bined ERR cua da Ce ome 5 3 1 Mechanical Setup nii eerta ape edt ea ek ee sve adea Rt CH EORR ERE ede bae Lee ded eel 5 3 2 enel esf o E 6 3 2 1 Sensors with Analog Output esesessssessieseseseeeeeene nennt nitet nn nentes nitri nnne nnne 7 3 2 3 Sensors with RS485 Interface ssssssssssssssssssesesseseenee nennen enne nennen reser 7 3 2 8 The Serial Communication sissisodan aaa aia 7 4 Mechanical Assemibly eet ueteres tena eer eg Du reu rt xev rx Re er ee 7 4 Typical AppliGatiOn i i uite deiecta cnet eed cr set eget n d grt cr cer 7 4 2 HOUSING EIXatlgDr eu occu sexes eren racer edm A Dv satur e east cr ves entr edm ves ELE v eed cg vus cre rv dd 7 b Electrical Gonnectioni uiuit neret o pne pus Dep eut t aede uu eee oe epa sucus reed Dp eR ecu rra gera 8 5b Pit GOMMOCUOM ve usine rede terere eg e eau eese enu Dua net uh Feu a FERE re eH ese Ee EF dcR pa eens 8 S Calibration GOntro lissint 8 5 2 1 Calibration Control at Analog Output sssssssssssseseseeeeeenneeeener enne nennen 9 5 2 2 Calibration Control at RS485 sssssssssssssssssseeseseeneee enne nennen nennen nnne nennen 9 53 OADE
5. D LORENZ MESSTECHNIK GmbH 92g Seosseios 07172937300 Operation Manual for Torque Sensors For below and similar Types TYP spere 3 ss ser N grenz ME Me pete DR 2113 DR 2153 DR 2413 DR 2453 DR 2493 DR 2494 E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 1 of 12 D LORENZ MESSTECHNIK GmbH xxu Fex07172 18373022 j Imprint Manufacturer Place Lorenz Messtechnik GmbH D 73553 Alfdorf DR 2113 DR 2413 DR 2493 DR 2153 DR 2453 DR 2494 and similar Copyright 2006 Lorenz Messtechnik GmbH Alfdorf Reprint Interdiction Reprint even in extracts only with written authorization Modification Technical changes reserved References in this Text 1 6 Warning Notes Page 5 Attention must be paid to the accident prevention regulations of the trade associations Coverings and casings are necessary before operating the sensor This is also valid for commissioning maintenance and trouble shooting Duties of the coverings and casings are Protection from detaching parts Protection from contusion and shear Prevention from reaching rotating parts Prevention from being tangled up and or getting caught by parts Coverings may Not grind Notrotate Coverings are also necessary outside of operating and motion travel areas of persons These demands can be modified if other sufficient safety devices are available During operation the safety precaut
6. threaded holes Fixation examples Coil spring thread rod with dead stop 5 5 1 Also see test certificate Electrical Connection Pin Connection Analog 1 Excitation 12 28 VDC 2 Excitation GND OV 3 Signal 5 V 10 V Signal GND OV L lt 2 0 V 5 Calibration control H gt 3 5 V 6 Option angle A TTL 7 Option angleB TTL a nc 12 Analog pin A NC B Option angle B TTL C Signal 5 V 10 V D Signal GND OV E Excitation GND OV F Excitation 12 28 VDC G Option angle A TTL H NC J NC K Calibration control L lt 2 0 V H 3 5 V L NC M Housing 5 2 Calibration Control Digital NC Option angle B TTL NC NC Excitation GND OV Excitation 12 28 VDC Option angle A TTL NC Output B RS485 NC Output A RS485 Housing Only use calibration control in unloaded condition of the torque sensor E Mail info lorenz sensors com Internet www lorenz sensors com Technical changes reserved Schirm Gehduse Shield gr n green Q braun brown grau grey amp rosa pink 2 rot red blau blue CD weiss white gelb yellow View socket on soldering side View socket on soldering side 090267 Page 8 of 12 D LORENZ MESSTECHNIK GmbH 3555 sion favorire 9790 2 5 2 1 Calibration Control at Analog Output Applying of voltage 5 V up to 28 V will enable the calibration 12 pin unction control
7. By a second transmitter trace displaced by 90 shifted Impulse Track 90 and flank evaluation the pulses revolutions can be lt a Se uae EM uk quadrupled The trace displaced by 90 can also be used for the rotational direction detection See corresponding data sheet for the output levels 2 Es aru rE Supply for angle sensor Stabilized supply voltage 5 V 25 mV p 491 shifted Current consumption max 20 mA E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 9 of 12 D LORENZ MESSTECHNIK GmbH usus Farorire anao 2o 6 Measuring 6 1 Engaging The warming up period of the torque sensor is approx 5 min Afterwards the measurement can be started LE The warming up period of the torque sensor is approx 5 min 6 2 Direction of Torque Torque means clockwise or clockwise torque if the torque acts clockwise when facing the shaft end In this case a positive electrical signal is obtained at the output Torque sensors by Lorenz Messtechnik GmbH can measure both clockwise and counter clockwise direction 6 3 Static Quasi Static Torques Static and or quasi static torque is a slowly changing torque The calibration of the sensors occurs statically on a calibration device The applied torque may accept any value up to the nominal torque 6 4 Dynamic Torques 6 4 1 General The static calibration procedure of torque sensors is also valid for dynamic ap
8. al is converted into DC voltage of 0 V 5 V proportionally to the torque and is available at the connector output 3 2 2 Sensors with RS485 Interface The torque sensor has a digital interface RS485 for the signal output and automatic sensor identification The protocol enables high dynamics See separate manual for further information 3 2 3 The Serial Communication See Lorenz Protocol Document Number 090110 Lorenz Messtechnik GmbH 4 Mechanical Assembly LE Caution During the assembly inadmissibly large forces may not act on the sensor or the couplings ts During the assembly the sensor must be supported to protect it from falling down 4 1 Typical Application Fixation Er ME Slip ring sensor Hazards by vibrations must be avoided Clip on tool C Caution Do not use pulse or impact wrenches 4 2 Housing Fixation The housing may not rotate This must be avoided by a flexible fixation axial and radial tolerance must be available The connection cable may not be used as a twist lock E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 7 of 12 D LORENZ MESSTECHNIK GmbH 925 Seosseios 07172937300 Typ T Messbereich Nr SST Ser NO RENZ MES e Obere Threaded holes for fastening of flexible housing fixation TECHNIK G 71172937200 Pe See data sheet for the exact position of the
9. ions must be operative By vibrations damages can occur at hand guided devices which can lead to injuries 4 Mechanical Assembly Page 7 F Caution During the assembly inadmissibly large forces may not act on the sensor or the couplings cS During the assembly the sensor must be supported to protect it from falling down 4 1 Typical Application Page 7 Caution Do not use pulse or impact wrenches 6 1 Engaging Page 10 Warming up period of the torque sensor is approx 5 min 6 4 2 Natural Resonances Page 10 An operation of the device in natural resonance can lead to permanent damages E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 2 of 12 D LORENZ MESSTECHNIK GmbH 3555 sion favorire rona j Contents INE adu 4 1 1 Safety and Caution Symbols essssssesseseseseeeee entente nne nhn nennen entren tnnt nnne tnra 4 12 CHU BSEC 4 DPI 4 1 3 1 Neglecting of Safety Notes sse nennen nnne eene ennt nennt rne renes 4 1 3 2 Remaining RB DI 4 1 4 X Reconstructions and Modifications ssesssessseeeeeeeeeeen nennen nene nnne nnns 4 IE donee 4 IE UdtBDIce m 5 2 Term DefInitiOlls i certet stirs iconv obrera a Era TEX CL Fete EEEE a eaaa EAA a aa uai daaa a e Vnd dentes cb dE ER RR ERER 5 A WORMS sais EE
10. plications Note The frequency of torques must be smaller than the natural frequency of the mechanical measurement setup The band width of alternating torque must be limited to 70 of the nominal torque 6 4 2 Natural Resonances Estimate of the mechanical natural frequencies c 1 1 1 fo Natural Frequency in Hz Ja lc J J2 Moment of Inertia in kg m Jo 2 7 Jj Torsional Rigidity in Nm rad J Further methods for the calculation of natural resonances are corresponding purchasable programs or books e g Holzer Procedure Dubbel Taschenbuch f r den Maschinenbau Springer Verlag An operation of the device in natural resonance can lead to permanent damages 6 5 SpeedLimits The maximum speed indicated in the data sheet may not be exceeded in any operating state 6 6 Disturbance Variables By disturbances measured value falsifications can occur by e Vibrations Temperature gradients Temperature changes Arising disturbance variables during operation e g imbalance Electrical disturbances Magnetic disturbances e EMC electromagnetic disturbances Therefore avoid these disturbance variables by decoupling of vibrations covers etc E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 10 of 12 D LORENZ MESSTECHNIK GmbH 3555 sion favorire rona j 7 Maintenance 7 1 Maintenance Schedule Action Freq
11. prietary Calibration essesssesssesesesseseeeneneenneennenennnn nennen nnne tnnt en rns nnns enne n nnne 12 11 2 DKD CaliDratiO mE AST PI H 12 11 3 Fe Calli rue LR 12 12 BEES RU I 12 13 Bici fece O n 12 E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 3 of 12 D LORENZ MESSTECHNIK GmbH 95 igor E7172 93022 1 Read First 1 1 Safety and Caution Symbols Caution Injury Risk for Persons Damage of the Device is possible so Note Important points to be considered 1 2 Intended Use Torque sensors are intended for the measurement of torques This measurand is further suitable for control tasks The valid safety regulations should be absolutely respected The torque sensors are not safety components in the sense of the intended use The sensors need to be transported and stored appropriately The assembly commissioning and disassembling must take place professionally 1 3 Dangers The torque sensor is fail safe and corresponds to the state of technology 1 3 1 Neglecting of Safety Notes At inappropriate use remaining dangers can emerge e g by untrained personnel The operation manual must be read and understood by each person entrusted with the assembly maintenance repair operation and disassembly of the torque sensor 1 3 2 Remaining Dangers The plant designer
12. ridges a rotating transformer according to the principle of a transformer is arranged in the sensor For supply and measuring signal conditioning electronics are integrated in the stator and the rotor E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 5 of 12 D LORENZ MESSTECHNIK GmbH 925 Seosseioi 07172937300 Electronics in the stator Electronics in the m Zo Z Option Angle Sensor 25 Bit __ WW ete ae ie ZINN eel Measuring side LAWS e epe e WM MLL Rotating transformer Shaft 3 2 Electrical Setup The supply of the rotor electronics occurs by an alternating voltage generated in the stator which transfers to the rotor through a rotating transformer There it is rectified and stabilized With this supply the strain gauge bridge is fed For the electrical calibration control of the sensor a control signal is up modulated to the supply by the u processor in the stator and transferred to the rotor There it is filtered and evaluated by the uPC which also activates the internal switch for the detuning of the strain gauge bridge The measuring signal of the strain gauge bridge is conditioned in an amplifier and then converted into a digital signal which will be transferred to the stator by another rotating transformer Compared to the analog signal the measuring signal in digital form is much more dis
13. t e Align correctly Unbalance e Balance the corresponding parts 8 Decommission All sensors must be dismantled professionally Do not strike sensor housings with tools Do not apply bending moments on the sensor e g through levers The torque sensor must be supported to avoid falling down during the dismantling 090267 Page 11 of 12 E Mail info lorenz sensors com Internet www lorenz sensors com Technical changes reserved D LORENZ MESSTECHNIK GmbH 3555 sion favorire rona j 9 Transportation and Storage The transportation of the sensors must occur in suitable packing For smaller sensors stable cartons which are well padded are sufficient e g air cushion film epoxy crisps paper shavings The sensor should be tidily packed into film so that no packing material can reach into the sensor ball bearings Larger sensors should be packed in cases 9 1 Transportation Only release well packed sensors for transportation The sensor should not be able to move back and forth in the packing The sensors must be protected from moisture Only use suitable means of transportation 9 2 Storage The storage of the sensors must occur in dry dust free rooms only Slightly lubricate shafts and flanges with oil before storing rust 10 Disposal The torque sensors must be disposed according to the valid provisions of law For this see our General Terms and Conditions www lorenz sensors com 11 Calibration A
14. t the time of delivery torque sensors have been adjusted and tested with traceable calibrated measuring equipment at factory side Optionally a calibration of the sensors can be carried out 11 1 Proprietary Calibration Acquisition of measurement points and issuing of a calibration protocol Traceable calibrated measuring equipment is being used for the calibration The sensor data are being checked during this calibration 11 2 DKD Calibration The calibration of the sensor is carried out according to the guidelines of the DKD The surveillance of the calibrating laboratory takes place by the DKD At this calibration the uncertainty of measurement of the torque measuring instrument is determined Further information can be obtained from Lorenz Messtechnik GmbH 11 3 Re Calibration The recalibration of the torque sensor should be carried out after 26 months at the latest Shorter intervals are appropriate e Overload of the sensor After repair After inappropriate handling Demand of high quality standards Special traceability requirements 12 Data Sheet See www lorenz sensors com 13 Literature Lorenz Protocol document no 090110 Lorenz Messtechnik GmbH Dubbel Taschenbuch f r den Maschinenbau Springer Verlag E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 12 of 12
15. te Coverings are also necessary outside of operating and motion travel areas of persons These demands can be modified if other sufficient safety devices are available During operation the safety precautions must be operative By vibrations damages can occur at hand guided devices which can lead to injuries 2 Term Definitions 2 1 Terms Measuring Side Mechanical connection of the torque sensor in which the torque to be measured is applied Usually this side has the smallest moment of inertia Drive Side Mechanical connection of the torque sensor on the opposite side of the measuring side usually with the largest moment of inertia At static torque sensors the housing is fastened on this side 2 2 Definition of the Pictograms on the Torque Sensor The measuring side of the torque sensor is designated as follows Measuring side M Or M Or More information can be found on the data sheet if needed 3 Product Description These sensors measure static and dynamic torques Caution it must be differentiated between drive side and measuring side see data sheet of the sensor www lorenz sensors com 3 14 Mechanical Setup The sensors consist of a torsion shaft Depending on design the mechanical connection possibilities are square or hexagon connections The torsion shaft applied with two strain gauge full bridges is bedded in a housing through ball bearings For the signal transmission and or the supply of the strain gauge full b
16. turbance free The remaining distance of the measuring signal within the sensor occurs in digital form completely Thus the measuring system achieves a high reliability of operation This signal is further conditioned in the stator comes into a p processor then depending upon sensor type it is converted to a voltage signal digital signal or to current and will then reach the output of the sensor and can be directly measured at the connector I Rotating Transformer i i Supply Oscillator i Voltage Or DC DC 4 MHz gt i i Supply and Cycle and Control Signal Control Signal i i Filter for Calibration Control Signal antral QQ Processor 4 3 l 9 Rotating Transformer y i Signal Signal Adaption Signal Output O t Analog or Digital Conditioning t u Processor i i Serial Data Transmission i A D Converter i 11 bit i 15 bit i A 5 Rotation Signal i Angle Output Conditionin a g Option BO SJ Rotation Angle Option i I Stator i Rotor Block diagram for serial signal transmission E Mail info lorenz sensors com Technical changes reserved 090267 Internet www lorenz sensors com Page 6 of 12 D LORENZ MESSTECHNIK GmbH 3555 sion favorire 1937902 j 3 2 1 Sensors with Analog Output At this output the digital sign
17. uency Date Date Date Control of cables and connectors 1x p a Calibration 26 months Control of fixation flanges shafts 1x p a Have bearings exchanged by Lorenz 20000 hrs Messtechnik GmbH operating time 7 2 Trouble Shooting This chart is used for searching for the most frequent errors and their elimination Problem Possible Cause Trouble Shooting No signal No sensor excitation e Outside of permissible range e Connect excitation e Cable defect e No mains supply Signal output connected wrong e Connect output correctly e Evaluation electronics defect Sensor does not react to torque Shaft not clamped e Clamp correctly No power supply e Outside of permissible range e Connect supply e Cable defect e Nomains supply Cable defect e Repair cable Connector connected wrong e Connect correctly Signal has dropouts Axial position rotor to stator e Align rotor outside of tolerance Cable defect e Repair cable Zero point outside of tolerance Cable defect e Repair cable Shaft mounted distorted e Mount correctly Distorted shaft string e Release from distortion Strong lateral forces e Reduce lateral forces Distorted flanges e Check evenness of flange surfaces Shaft overloaded e Send to manufacturer Wrong torque indication Calibration not correct e Re calibrate Sensor defect e Repair by manufacturer Torque shunt e Eliminate shunt Oscillations Alignment of shaft not correc
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