R30A - AC Operated, Light Weight RVDT AC operation 60 degree angular sensing range Light weight Non-contact electrical design Wide operating temperature range Size 11 servo mount Anodized aluminum housing DESCRIPTION The R30A RVDT (Rotary Variable Differential Transformer) is an angular position sensor that incorporates a proprietary non-contact design which dramatically improves long term reliability when compared to other traditional rotary devices such as synchros, resolvers and potentiometers. This unique design eliminates assemblies that degrade over time such as slip rings, rotor windings, contact brushes and wipers, without sacrificing accuracy. High reliability and performance are achieved through the use of a specially shaped rotor and wound coil that together simulates the linear displacement of a Linear Variable Differential Transformer (LVDT). Rotational movement of the rotor shaft results in a linear change in the amplitude of the output signal, directly proportional to the shaft angle change, while the phase of this output signal indicates the direction of displacement from the null point. Non-contact electromagnetic coupling of the rotor provides infinite resolution thus enabling absolute measurements to a fraction of a degree. AC operation eliminates the need for integrated signal conditioning components, thereby offering the user an extremely wide operating temperature range of -55C to +150C. Factory calibrated to operate over a 30 degree range, the R30A offers a non-linearity of less than 0.25% of full range. Extended range operation up to a maximum of 60 degrees is possible with increased non-linearity. Packaged in a small, size 11 servo mount, aluminum housing with flying lead termination, the R30A is ideal for space restrictive applications. Also see our other angular position sensor models, R36AS (stainless steel housing, MS style connector), RSYN (high output, shock and vibration tolerant), R30D and R60D (bipolar DC operation), and the RVIT-15 Series (single ended DC operation, voltage or current output). Measurement Specialties offers many other types of sensors and signal conditioners. Data sheets can be downloaded from our web site at: http://www.meas-spec.com/datasheets.aspx Measurement Specialties, Inc. acquired Schaevitz Sensors and the SchaevitzTM trademark in 2000. FEATURES APPLICATIONS High accuracy Infinite resolution Long term reliability Wide -55 to +150C operating temp range Rugged anodized aluminum housing Shielded ABEC 3 precision bearings R30A Rev. 8 Valve position Machine tool equipment Rotary actuator feedback Dancer arm position Process control www.meas-spec.com 1/3 2015-November R30A - AC Operated, Light Weight RVDT PERFORMANCE SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter Angular range, degrees Non-linearity, % of FR Output at range ends (*) Sensitivity Temp coefficient of sensitivity Input / Output impedances Phase shift Input voltage and frequency Null voltage @10kHz Input Frequency (recommended) 30 40 60 0.25% 1% 2% 87mV/V 116mV/V 174mV/V 2.9 mV/V/degree 0.02%/F [0.036%/C], 20 to +160F [-7 to +71C] 370 / 1300 +3 3 VRMS @ 2.5 to 10 kHz (10kHz recommended) 0.5% of FRO, maximum @2.5kHz Input Frequency 30 40 60 0.25% 1% 2% 69 mV/V 92 mV/V 138 mV/V 2.3 mV/V/degree Not specified 135 / 600 +35 ENVIRONMENTAL AND MECHANICAL SPECIFICATIONS Operating temperature Mechanical angular range Bearings Shaft diameter Housing material Mounting Moment of inertia Maximum torque, unbalance Maximum torque, friction Shaft load capability Electrical connection Weight IEC 60529 rating -67F to +300F [-55C to 150C] 360 degrees (no stops) Shielded ABEC 3 precision 3/16 inch [4.76 mm] Aluminum, anodized Size 11 servo mount per BU-ORD 0.53 x 10-6 inch.lb-force.second2 [0.61 x 10-6 Kg-force.cm.second2] 0.004 inch.ounce-force [0.3 gram-force.cm] 0.015 inch.ounce-force [1.1 gram-force.cm] 10 lb [4.5Kg] Axial; 8 lb [3.6 Kg] Radial 6 lead wires, AWG 28, PTFE insulation, 12 inches [30cm] long 1.3 oz [36 Grams] IP60 Notes: All values are nominal unless otherwise noted (*): Unit for output at range ends is millivolt per volt of excitation (input voltage) FR (Full Range) is the angular range, end to end; 2xA for A angular range FRO (Full Range Output): Algebraic difference in outputs measured at the ends of the range DIMENSIONS Dimensions are in inch (mm) R30A Rev. 8 www.meas-spec.com 2/3 2015-November R30A - AC Operated, Light Weight RVDT WIRING INFORMATION Connect Green to Blue for differential output ORDERING INFORMATION Description RVDT 30, 10KHz calibration (standard) Model Part Number R30A 02560231-000 OPTIONS RVDT 40, 10KHz calibration RVDT 60, 10KHz calibration RVDT with 2.5KHz calibration 02560231-140 02560231-160 02560231-2XX ACCESSORIES 66530072-000 R-FLEX multipurpose coupling kit Refer to our "RVDT and RVIT Accessories" data sheet for other accessories. TECHNICAL CONTACT INFORMATION NORTH AMERICA EUROPE ASIA Measurement Specialties, Inc. 1000 Lucas Way Hampton, VA 23666 United States Phone: +1-800-745-8008 Fax: +1-757-766-4297 Email: sales@meas-spec.com Web: www.meas-spec.com MEAS Deutschland GmbH Hauert 13 D-44227 Dortmund Germany Phone: +49-(0)231-9740-0 Fax: +49-(0)231-9740-20 Email: info.de@meas-spec.com Web: www.meas-spec.com Measurement Specialties China Ltd. No. 26, Langshan Road High-tech Park (North) Nanshan District, Shenzhen 518057 China Phone: +86-755-33305088 Fax: +86-755-33305099 Email: info.cn@meas-spec.com Web: www.meas-spec.com The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different applications. All operating parameters must be validated for each customer application by customer's technical experts. Measurement Specialties, Inc. does not convey any license under its patent rights nor the rights of others. R30A Rev. 8 www.meas-spec.com 3/3 2015-November