TORQSENSE®
Contents
1. St s NSOR i TECHNOLO qe SENSOR N NAY TECHNOLOGY TOR Digital RWT350 360 series Pulley Spocket Torque Transducer TorqSense Digital RWT350 amp 360 series pulley sprocket Software transducers with integral electronics now offer cost TorqView is an easy to use advanced torque monitoring effective non contact digital rotary torque measurement software available to assist data recording and using Surface Acoustic Wave technology suitable for instrumentation displays that interface with Windows torque monitoring and process control on any belt chain based PCs See TorqView datasheet driven machinery TorqSense transducers and their technology are particularly appropriate for OEM Features 3 types of display Text files compatible applications with Matlab and Excel Real time chart plotting f LabView VIs are available for users to design their own Benefits process control applications e Direct replacement for standard pulley spocket DLLs are also available for users to write their own e Low inertia High custom software Speed capability because electronics are not fixed on to shaft e Non contact measurement e High bandwidth 200 safe mechanical overload High accuracy and resolution Excellent noise immunity Integral digital electronics Operates both statically and dynamically Clockwise anti clockwise e Any full scale torque can be specified within Standard range 100N2. RWT360 gt y O Ses Torque amp Speed Low Resolution aa Specify RPM FSD 60 pulses rev Torque amp Power 35 Specify Power FSD Torque amp Speed Low Resolution o a User self selectable or Power 60 pulses rev Standard features Standard features 1 Hl l a Voltage Output 5v FSD Voltage Output 1v to 10v FSD and D CE ST US User self selectable Unipolar RS232 Output SSS d o e e S Torque Averaging o Z lo o T e Po o Torque Peak _ _ oS d o e G e Self Diagnostics oS o o e o S Internal Temperature Reading T e Poo o Deep grooved shielded bearings with oil lubrication Ingress Protection IP 54 a E E electronics module _Optional features ll cee Ace ey Ne Te Voltage Output 10vFSD CL CC In place ofOptionB Unipolar voltages __ _U Cer to specify D npe of Options AB 8 C_ Current rane 4 20mA In place of Options A B amp C Current Output 12mA 8mA In place of Options A B amp C Current Output 0 20mA 4 20mA Current output is user amp 12MA 8mA selectable and in place of Voltage output However user can reselect a Voltage output if required Note 6 USB2 0 full speed 12 Mbps Digital output D CANbus output In place of R232 High Speed Bearings Sealed Bearings Ingress Protection IP 65 for sensor and electronics See Note 7 below Siew lead b w head amp electronics Cavity D connectors in lead b w head amp EARSTEN electron
3. Any torque FSD Is possible between ranges please specify max rated torque Note 2 Max rated torque should not be exceeded Note 3 Please consult factory for applications requiring rotational speeds that exceed maximum figures given Transducers fitted for IP65 will have running speeds considerably reduced increased drag torque and accuracy can be affected Note 4 SM Static Mode Dynamic values will depend upon user application and has to be adjusted accordingly Note 5 Digital averaging can be configured by user to optimise accuracy frequency response for specific user applications Digital averaging default setting is N 16 For details see User Manual Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3437R Rev1 RWT350 360 Series Torque Transducers Dimensions 5KNm Please consult factory for other sizes FULLY MOQUN TIS 3 Pi MIS x 10 DPPH 1 POS 20 5 COUPLING HOUSING RWT350 360 Series Electronics Module CABLE GLAND M3 x 10 DPPIN 4 POS VIEW ON BASE Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3437R Rev1 RWT350 360 Series Torque Transducers Standard Range e Standard feature Optional feature E a Series Code _Torque Speed Power Outputs RWT350
4. for Analog output Rotational speed max Consult factory Temperature Measurement method IR temperature sensor monitoring actual shaft temperature Temperature accuracy dt O a Ie temperature Trt Operating range ATo Cid 10040 y O Storage range ATs lt 2to 0 C Specifications Linearity 02 DS Hysteresis SCC AS Resolution aS Repeatability fa FS RWT350 Series Transducers ONLY Frequency response ee RE Note 4 RWT360 Series Transducers ONLY Frequency response __ __ 1620 610 405 _202__ _101__ _so_ __25_ _12_ __Ha _ Note 4 Digital averaging See Note 5 1 2 4 8 16 32 6 128 N Analog output ee Options available 1 5 10 Unipolar RWT350 Series default setting is 5Vdc Torque Speed Power RWT360 Series output voltages are user selectable RE See Seen ceo TOUA specu Powe RWT360 Series output currents are user selectable 4 20mA Loop resistance 1 Should not exceed 400 Digital output RWT360 Series Transducers ONLY Output type RS232 Standard USB 2 0 full speed 12 Mbps optional CANbus optional Samplingrate a ksps Power supply Nominal voltage Vs ft 32 mad V Current consumption Is FO max mA Power consumption We WW excitation voltage Viippie above nominal supply voltage Electromagnetic compatibility Electromagnetic compatibili EMC compatibility es EN 61326 2006 Note 1
5. ad ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC via 15 Way D type female to RS232 USB ACC 6 USB Option G or RS232 and Power Connectors Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC via 15 Way D type female to CANbus and ACC 8 CANbus Option H Power Connectors Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m For connecting RWT to PC via USB Option G or CANbus ACC 9 Option H Also needs Digital Lead ACC4 to connect to RWT 15 Way D type female to CANbus USB and Power Connectors RWT350 360 Series Torque Transducers Additional related products Remarks Purpose Transducer Display ETD Display readout AC Mains Adapter Power Supply PSU 1 For providing 12 32Vdc Transducer Signal Breakout Unit SBU 2 Torque Monitoring Software ACC 3 amp 4 Ge a a LESC 12 Pin Lumberg RS232 ACC5 CANbus ACC 8 LELEELLE 0 KELLEL 15 Way D Type connects to ACC4 Power ACC 6 or 9 i ooneee 00 CELLE 15 Way D Type connects to ACC4 Data parameters measured at 20 C Power Sensor Techiselogpr Rachihblogy Ltd reserves the right to change specification and dimensions withoutRWbf amp 437R Rev1 When you order a Torque Transducer please note that any torque FSD is possible between ranges please specify rated torque and optio
6. have not been exceeded Transducer configuration software to allow user to changes transducer variables Ability to connect up to 10 transducers using USB US Patents US5585571 US6478584 Aa E e ln RWT3243R Sensors to monitor shaft temperature for better compensation and accuracy Integral electronics enables the resonant frequencies to be measured and offer user selectable features digital outputs and diagnostics SAW devices are not affected by magnetic fields RWT350 360 Series Torque Transducers Data Specification PRELIMINARY Parameter Condition ata Units E TY RWT350 360 Torque measurement system Measurement method Strain Dependent Surface Acoustic Wave Resonators interrogated by an incremental electronic scanning method Torque range See Notes 1 From 100 10 000 amp 2 below From 1000 100 000 Bt Rotation speed angle of rotation measurement system Measurement method Opto switch through slotted disc Direct output signal Pulse output direct from opto switch TTL 5V square wave output is independent of any analog or Gor processing Digital Processing Processing Method Update rate for analog and digital outputs Techniques Mode 1 Slow Method Processing modes run Frequency Count simultaneously and can Mode 2 Fast Method be applied to either QUE A ATASE MELIO 0 2000 RPM RPM 3 Hz analog channel or Period Count accessed individually via a digital connection Default mode gt 2000 RPM 2 KHz
7. ics Link Cable gt 2m o R Consult factory for length When you order a Torque Transducer please note that any torque FSD is possible between ranges please specify rated torque and options using the following format Consult factory for maximum speed allowances Note 6 2 x analog channels available Default settings are Channel 1 voltage current torque Channel 2 voltage current speed or power if ordered Note 7 Transducers fitted for IP65 will have running speeds considerably reduced increased drag torque and accuracy can be affected Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3437R Rev1 RWT350 360 Series Torque Transducers Connector and Lead Options RWT350 360 Remarks Purpose Series Code Connectors amp Leads RWT350 RWT360 gt gt ER l oe a paee 12 Pin Lumberg female 12 Pin Lumberg male Analog Lead Length 2 5m For connecting RWT to users 12 Pin Lumberg female to 15 way D ACC 3 system via 15 pin D connector type connector female Digital Lead Length 2 5m For connecting RWT to users 12 Pin Lumberg male to 15 way D fo nec system via 15 pin D connector type connector male Digital Lead Adapter Length 1m For connecting RWT to PC via 15 Way D type female to RS232 and ACC 5 RS232 Power Connectors Also needs Digital Le
8. m through to 10 000Nm e Lifetime warranty Taren ati x Dials Digital Chart Setup About SSI Lie RU TorqSense RWT350 series transducers offer e Fixed voltage or current analog outputs one for torque and the other for speed or power for interfacing with legacy analog instrumentation e BIT Self diagnostics for letting the manufacturer know that the transducer s torque speed ratings and calibration due date have not been exceeded e Simple Fail output pin e Sensors to monitor shaft temperature for better compensation and accuracy Whereas TorqSense RWT360 series transducers offer e 2 x user selectable voltage or current analog outputs one for torque and the other for speed power or peak torque for interfacing with legacy Consult factory for ranges greater than 10KNm High speeds available on request Technology TorqSense patented technology is the measurement of the resonant frequency change in frequency dependent analog instrumentation surface acoustic wave devices caused when strain is Digital outputs such as RS232 CANbus and USB for applied The signal is coupled via a non contact RF i i interfacing with modern instrumentation and laptops rotating couple from the shaft to a fixed pick up Digital input for configuring transducer via PC BIT Self diagnostics for letting users know data is trustworthy that the transducer s torque speed ratings and calibration due date
9. ns using the following format A basic transducer with 351 100Nm CL torque and speed outputs rated and calibrated to 100Nm FSD 10v and IP65 protection For example RWT Your transducer requirement RWT Max speed if applicable Connector amp Lead options if applicable See over Additional related products if applicable See over Glossary of terms and definitions used in this datasheet e Surface Acoustic Wave SAW An acoustic wave travelling along the surface of a material having some elasticity with amplitude that typically decays exponentially with the depth of the substrate e Strain dependent SAW resonators A type of elastic SAW device which changes its resonant properties when it is subjected to axial strain compression TorqSense uses this principle which is protected by a number of patents e Incremental Electronic Scan IES The most successful and precise method for interrogating strain dependent SAW resonators The IES interrogation method uses a processor controlled frequency synthesiser to excite the SAW resonators over a defined range of frequencies and measure the reflected signal TorqSense uses this patented method e Resolution of the IES method The minimum measurable number corresponding to the stress strain sensitive resonance point of the SAW resonator The value is limited by following the factors e frequency resolution of the synthesiser which is 1000 times greater then o
10. verall resolution of the system e relationship between frequency response and resolution Increments of the resolution will proportionally decrease the system s frequency response TorqSense systems are optimised for the best performance that suits most applications However on the RWT360 series models customers do have the capability to adjust the system performance e Frequency response of the IES method The measure of the TorqSense system s response at the output to a signal of varying frequency at its input The frequency response is typically characterised by the magnitude of the system s response measured in dB There are two ways of characterising the system s frequency response e 0 1dB frequency range where the output magnitude of the signal is different to the input magnitude of the signal by not more then 0 1dB practically absolutely identical e 3dB frequency range where the output magnitude of the signal is 0 707 of the input signal This is a common standard for most applications unless it specifically says otherwise This standard is also used to characterise the TorqSense system s frequency response e Accuracy The degree of conformity of a measured or calculated quantity which will show the same or similar results Accuracy of the overall TorqSense system is limited by the combined error of several factors such as linearity hysteresis temperature drifts and other parameters affecting measurements If errors in the s
11. ystem are known or can be estimated an overall error or uncertainty of measurement can be calculated e Digital averaging The application of algorithms to reduce white noise In any electronic system electronic white noise is mixed with the signal and this noise usually limits the accuracy To reduce the influence of white noise and increase the accuracy of the system different averaging algorithms can be applied In the TorqSense system a flying digital averaging technique is applied to reduce the white noise commensurate with the level of accuracy required However as any averaging algorithm works as a low pass filter the more averaging that is applied the lower the frequency response Therefore each Torqsense system should be optimised to the customer s requirements by choosing the right combination of accuracy frequency response Please see relevant part of the Datasheet and User Manual Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3437R Rev1
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