Datasheet - Sensor Technology
Contents
1. TORON SS qe SENSOR NM NAY Y TECHNOLOGY Digital RWT310 320 series Torque Transducer TorqSense Digital RWT310 amp 320 series transducers with integral electronics now offer cost effective non contact digital rotary torque measurement using Surface Acoustic Wave technology suitable for torque monitoring testing or controlling drive mechanisms TorqSense RWT310 amp 320 series transducers and their technology are particularly appropriate for OEM applications Benefits e Minimal shaft length High shaft stiffness e Low inertia High Speed capability because electronics are not fixed on to shaft Er 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 1Nm through to 10 000Nm e Lifetime warranty 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 surface acoustic wave devices caused when strain is applied The signal is coupled via a non contact RF rotating couple from the shaft to a fixed pick up Integral electronics enables the resonant frequencies to be measured and offer use2. Power consumption Ws o SSS 6 O mA W Allowed residual ripple 500 mVp p Vrippie Electromagnetic compatibility EMC compatibility ker EN 61326 2006 E Note 1 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 O Sensor Technology Ltd 2011 RWT3177R Rev4F RWT310 320 Series Torque Transducers Dimensions 1Nm to 100Nm Parameter Data Units Mechanical Properties Torque Max 1 2 5 3 9 6 8 5 13 17 5 20 30 55 85 100 Nm Shaft Code pa pF os oe pe bo be EB ec ED BEI Shaft Size Diameter Stiffness Freibad EA 0 ar se eg of inertia Ly m Max measurable 120 of rated torque load limit Static safe load 200 of rated torque breaking approx
3. Transducer with 1 0 1 0 1 1 1 1 shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3177R Rev4F RWT310 320 Series Torque Transducers Dimensions 101Nm to 500Nm Parameter Data Units Mechanical Properties Torque Max 175 225 265 350 500 Shaft Code A O A O e O Shaft Size Diameter Torsional stiffness kNm rad Mass moment of 138 9 143 1 147 7 151 9 174 2 10 kgm inertia Max measurable 120 of rated torque load limit Static safe load 200 of rated torque breaking Shaft weight approx Transducer with 2 4 2 4 2 4 2 5 2 5 kg shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3177R Rev4F RWT310 320 Series Torque Transducers Dimensions 501Nm to 10000Nm 203 00 163 00 8125 00 M6 x 14 DEEP 0 15 7 50 9 Units Mechanical Properties 4000 Shaft Code Shaft Size Diameter Torsional Stiffness 199 2 214 1 914 4 945 5 kNm rad Mass moment of TBC TBC 1330 TBC 1497 TBC 7932 7 9407 1 10 inertia kg m Max measurable 120 of rated torque load limit Static safe load 200 of rated torque breaking approx Transducer with TBC TBC
4. male Digital Lead Adapter Length 1m 15 Way D type female to RS232 and Power Connectors ACC 1 ACC 2 For user to self wire For connecting RWT to user s ACC 3 system via 15 pin D connector For connecting RWT to users ACC 4 system via 15 pin D connector For connecting RWT to PC via RS232 Also needs Digital Lead ACC4 to connect to RWT For connecting RWT to PC v a USB Option G or RS232 Also needs Digital Lead ACC4 to connect to RWT For connecting RWT to PC v a CANbus Option H 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 USB USB Option G or CANbus and Power Connectors Option H Also needs Digital Lead ACC4 to connect to RWT Digital Lead Adapter Length 1m 15 Way D type female to RS232 USB and Power Connectors Digital Lead Adapter Length 1m 15 Way D type female to CANbus and Power Connectors RWT310 320 Series Torque Transducers Additional related products Transducer Display ETD Display readout AC Mains Adapter Power Supply PSU 1 For providing 12 32Vdc Transducer Signal Breakout Unit SBU 1 Torque Monitoring Software ACC 384 eg a o a a TIS 12 Pin Lumberg RS232 ACC 5 CANbus ACC 8 U 00000000 6000000 15 Way D Type connects to ACC4 Power ACC 6 or 9 7 00000000 aaa 15 Way D Type connects
5. PM 2000 x 0 3227 650 analog channel or 4000 8000 RPM RPM 4000 x 0 196 800 Hz accessed individually via 8000 16000 RPM RPM 8000 x 0 1117 850 a digital connection 16000 32000 RPM RPM 16000 x 0 058 900 Temperature Measurement method IR temperature sensor monitoring actual shaft temperature Temperature accuracy C temperature Ter Operating range ATo AO ORO O CE O Storage range ATs tO FO 0 05 Specifications linearity PS Hysteresis S Resolution A FS Repeatability A IIS RWT310 Series Transducers ONLY Frequency response A por Accuracy 20 C SM 0 25 0 5 for 2Nm and below See Note 4 RWT320 Series Transducers ONLY Frequency response 1620 202 0 5 See Note 4 Digital averaging SeeNote5 2 4 8 16 32 64 12 N Analog output Output voltages Options available 1 5 10 Unipolar RWT310 Series default setting is 5Vdc Vdc Torque Speed Power RWT320 Series output voltages are user selectable Load impedance Maxim to OY KO eee m Torque Speed Power RWT320 Series output currents are user selectable 4 20mA Loop resistance _____ __________ Shouldnotexceed400 go Digital output RWT320 Series Transducers ONLY Output type RS232 Standard USB 2 0 full speed 12 Mbps optional CANbus optional Sampling rate AR O ksi Nominal voltage Vs 12to32 max Current consumption Is 500 mx mA E WwW
6. ansducer via PC BIT Self diagnostics for letting users know data is trustworthy that the transducer s torque speed ratings and calibration due date have not been exceeded Transducer configuration software to allow user to changes transducer variables e Ability to connect up to 10 transducers using USB e Simple Fail output pin Sensors to monitor shaft temperature for better compensation and accuracy RWT310 320 Series Torque Transducers Data Specification Parameter Condition ta nits RWT310 320 Torque measurement system Strain Dependent Surface Acoustic Wave Resonators interrogated by an incremental electronic scanning method Torque range See Notes 1 0 1 1 0 21 0 101 O 501 0 2001 amp 2 below to 0 20 to0 100 to0 500 to 0 2000 to 0 10000 0 11 0 201 0 1001 0 5001 0 20001 lbf in to 0 200 to0 1000 to0 5000 to0 20000 to 0 100000 Shaft size diameter 6 12 20 30 50 75 mm 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 digital processing Digital Processing Processing Method Update rate for analog and digital outputs o Techniques Mode 1 Slow Method Frequency Count 1 Processing modes run simultaneously and can 0 2000 RPM RPM 2 be applied to either en 2000 4000 RPM R
7. cies 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 overall 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 RWT320 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 fr
8. equency 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 system 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 RWT3177R Rev4F
9. r selectable features digital outputs and diagnostics SAW devices are not affected by magnetic fields US Patents US5585571 US6478584 RWT3243R Software TorqView is an easy to use advanced torque monitoring software available to assist data recording and instrumentation displays that interface with Windows based PCs See TorqView datasheet Features 3 types of display Text files compatible with Matlab and Excel Real time chart plotting LabView VIs are available for users to design their own process control applications DLLs are also available for users to write their own custom software Ol Tare Dale Digital Chart Setup About TorqSense RWT310 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 BIT Self diagnostics for letting the manufacturer know that the transducer s torque speed ratings and calibration due date have not been exceeded Simple Fail output pin Sensors to monitor shaft temperature for better compensation and accuracy Whereas TorqSense RWT320 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 analog instrumentation Digital outputs such as RS232 and USB for interfacing with modern instrumentation and laptops Digital input for configuring tr
10. shaft weight approx Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3177R Rev4F RWT310 320 Series Torque Transducers Standard Range e Standard feature o Optional feature EEE EEE Series Code _Torque Speed Power Outputs RWT310 RWT320 Torqueony o o S 310 320 Torque amp Speed 60 pulses rev pa User to specify RPM FSD when oe Torque amp Speed 360 pulses rev 312 Torque amp Power 60 pulses rev 37 to EEE Power FSD when ordering Torque amp Speed 60 pulses rev a T Outputs are user selectable or Power Standard features i eas Keyed Shaft Ends ee 1Nm will have flats Voltage output 5v FSD Fixed E E BS Voltage outputs from 1v to 10v FSD SA A and unipolar Variable RS232 output PE ae O Torque Averaging and Torque Peak r Self Diagnostics Self Diagnostics Cd e NOM A PA I REC FRE Faint series only o BEE Y lubrication Ingress Protection Ingress Protection IP 54 54 NS NN NT AA NAAA than keyed end shafts consult factory for length Voltage output 1v FSD Fixed A InplaceofOptonB Voltage output 10v FSD Fixed gt C InplaceofOptinB_ Unipolar voltages Fixed U to specify range scale when ordering e EEE BEE EC epa options A HE GE DE 7 ih options rn ren options Current ou
11. to ACC4 Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3177R Rev4F When ordering a Torque Transducer please note that any torque FSD is possible between ranges please specify rated torque and options using the following format A basic transducer with 311 15Nm torque and speed outputs rated and calibrated to 15Nm FSD with keyed ends 10v and IP65 protection RPM if applicable See over For example RWT Your transducer requirement RWT Max speed if applicable Connector amp Lead options 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 frequen
12. tput is user Current output 0 20mA 4 20mA selectable and in place of amp 12 8mA Variable Voltage output However user can reselect a Voltage output if required Note 6 USB 2 0 full speed 12 Mbps USE 2 0 Mu speed 12 Mbps Digital output output o G CANbus CANbus output gt gt gt lo In place of RS232 ouput ee E Note 7 below Sealed Bearingas S e e factory for maximum IK A See Note 8 below Note 6 2xanalog channels available Default settings are Channel 1 voltage current torque Channel 2 voltage current speed or power if ordered Note 7 At very high speeds for better balance the factory recommend plain or splined shafts Note 8 Transducers fitted for IP65 will have running speeds considerably reduced increased drag torque and accuracy can be affected 18 Data parameters measured at 20 C Sensor Technology Ltd reserves the right to change specification and dimensions without notice Sensor Technology Ltd 2011 RWT3177R Rev4F RWT310 320 Series Torque Transducers Connector and Lead Options RWT310 320 Series RWT310 RWT320 Option Remarks Purpose Code VA For user to self wire Connectors Leads Analog Connector 12 Pin Lumberg female Digital Connector 12 Pin Lumberg male Analog Lead Length 2 5m 12 Pin Lumberg female to 15 way D tvpe connector female Digital Lead Length 2 5m 12 Pin Lumberg male to 15 way D type connector
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