RWT310/320 Series Torque transducers - Data Specification

Parameter Condition Data Units RWT310/320 Torque measurement system Measurement method Strain Dependent Surface Acoustic Wave Resonators (interrogated by an incremental electronic scanning method) Torque range 0 – 0.5 to 0 – 1 0 – 1.1 to 0 - 20 0 – 21 to 0 - 100 0 – 101 to 0 - 500 0 - 501 to 0 - 2000 0 – 2001 to 0 - 10000 Nm
(See Notes 1 & 2 below) [0 – 5 to 0 - 10] [0 – 11 to 0 - 200] [0 – 201 to 0 - 1000] [0 – 1001 to 0 - 5000] [0 – 5001 to 0 - 20000] [0 – 2001 to 0 - 100000] [lbf
. in] Shaft size (diameter) 6 12 20 30 50 75 mm Rotation speed/angle of rotation measurement system Measurement method IR optical transceiver through slotted disc Output signal Digital, TTL level (5V, square wave signal) Update rate (frequency mode above 80 rpm) Fixed output 1 sec Update time (period mode below 80 rpm) Variable output 1000/(RPM x 60) ms Rotational speed (max)
(See Note 3) 30,000 20,000 15,000 12,000 9,000 6,000 RPM Temperature measurement method Ir temperature sensor monitoring actual shaft temperature Temperature accuracy 1
C Reference temperature, T
C
RT 20 Operating range, T

O -10 to +50 C Storage range, T

S -20 to +70 C Temperature drift (FS) Max 0.05 %FS/
C RWT310 Series Transducers ONLY Linearity 0.2 %FS Hysteresis <0.1 %FS Resolution 0.1 %FS Frequency response 101 Hz Accuracy 20
C, SM 0.25 %FS
(See Note 4) RWT320 Series Transducers ONLY Linearity 0.2 %FS Hysteresis <0.1 %FS Resolution 0.1 %FS Frequency response 1620 810 405 202 101 50 25 12 Hz Accuracy 20
C, SM
(See Note 4) 1 0.7 0.5 0.4 0.25 0.25 0.25 0.25 %FS Digital averaging
(See Note 5) 1 2 4 8 16 32 64 128 N Analogue output Output voltage 1 / 5 / 10 (Default is 5Vdc on RWT310 Series) (Output voltage is user selectable from 1 to 10 on RWT320 Series) Vdc Output current 4-20 optional (0-20 not yet available) (user selectable on RWT320 Series when 0-20 available) mA Load impedance 25 K Digital output (RWT320 Series Transducers ONLY) Output type RS-232 (Standard), USB (optional) Sampling rate 1.62 ksps Power supply Nominal voltage, V
S 12 to 32 (max) V Current consumption, I
S 290 (max) mA Power consumption, W
S 3.5 W Allowed residual ripple of excitation voltage, V
ripple 500 (above nominal supply voltage) mVp-p Electromagnetic compatibility EMC compatibility EN 55011 & EN 61326-1 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. 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. Sensor Technolo g y Ltd reserves the ri g ht to chan g e specification and dimensions without notice. © Sensor Technology Ltd 2006,2007 RWT3177R (Rev1)