MagneRule PlusTM Magnetostrictive Linear Displacement Transducer The MagneRule PlusTM magnetostrictive linear displacement transducer provides highly accurate absolute position measurement of displacement up to 120 inches (3 meters). The sensor also measures velocity, giving feedback of both position and velocity simultaneously. Hostile Environments MagneRule PlusTM operates in hostile industrial environments with high temperatures and working pressure. The sensor probe is pressure-sealed with an "O" ring to operate in hydraulic fluids up to 5000 psi. Integral electronics are protected against contamination from dust. Operation is based on accurately measuring the distance from a predetermined point to a magnetic field produced by a movable permanent magnet. The design and durability of the sensor make it ideal for measuring position of moving machine members. Selectable Inputs/Outputs MagneRule Plus is powered by 15 VDC or 24 VDC. By providing an absolute output, no data is lost should power be interrupted. The long stroke sensor offers a universal analog position output, as well as a velocity output. Therefore, one unit can be stocked for multiple applications. Excellent Performance A marked improvement over potentiometers for long stroke position measurement, the MagneRule PlusTM possesses exceptional linearity, even over lengths up to 120 inches (3 meters), with repeatability up to 0.002% of the measurement range. By utilizing magnetostrictive technology, MagneRule Plus, requires no contact between parts that cause friction or premature wear, offering high reliability and extended life. Good stroke-to-length ratio provides for a more compact long stroke position sensor. Internet: www.schaevitz.com North America Tel: 800/745-8008 Document Fax Back: 916/431-6541 Europe Tel: (01753) 537622 Easy Installation The design of the MagneRule PlusTM permits simple mounting and hookup. Electronics are self-contained in the sensor head, eliminating the need for additional electronic packages. For external sensor installation, special mounting kits and various magnet options are available. 104 MagneRule PlusTM Magnetostrictive Linear Displacement Transducer Technology Overview Operation A trigger coil periodically sends short duration current pulses ("start" pulses) down the waveguide. When the magnetic field accompanying the current pulses intersects the magnetic field of the movable ring, magnetostriction causes a momentary torsional strain in the wire. This strain travels back down the wire and is converted back to an electrical pulse ("stop" pulse) in the head. By measuring the time difference between the start and stop pulses, the position of the magnet ring can be precisely determined. Custom Designs For OEM applications with unique requirements, MagneRule PlusTM can be tailored to specific length and mounting requirements. Schaevitz(R) also offers this sensor with alternate threading, special magnets, and tailored electronics. Hardware MagneRule Plus consists of a nonmagnetic, pressure-sealed stainless steel tube (probe) welded to an enclosed stainless steel base (head). The probe contains a stretched magnetostrictive wire, and the head contains the transducer's control electronics. A permanent magnet ring serving as a movable position marker slides over the outside of the tube. Universal Analog Outputs MagneRule PlusTM translates this time-based position measurement into an analog output signal. A user selectable 0 to 10 VDC voltage (either low or high frequency response) or a 4-20 mA current (3-wire) output is available in either forward or reverse slope signals. Additionally, velocity of the moving magnet ring (up to 10 in/sec) is generated by differentiating the position signal. State-of-the-Art Electronics By utilizing the latest in surface mount technology in the design of its electronics, MagneRule PlusTM provides stateof-the-art features such as user-selectable inputs and outputs in a smaller electronics package. Noncontacting magnet carrier ring Longitudinal magnetic field S End damper N Protective stainless steel tube N Solid wire wave guide S Start pulse Torsional deformation of waveguide S Current pulse input ( Iin) Mode converter output E o Bias magnet I in to wave guide (Pstart ) Actual E o from mode converter N Mode converter Electronically conditioned Eo (Pstop ) Stop pulse Pulse duration proportional PWM signal generated using Pstart and Pstop To magnetic ring position Time 105 MagneRule PlusTM Specifications Performance Specifications Outputs Standard Ranges .............. 6, 12, 18, 24, 30, 36, 48, 60, 72, 84, 96, 108 and 120 inches (metric units also available) Input Power ...................... 15 VDC 10% (70 mA) or +24 VDC 10% (90 mA) (inputs are user-selectable) Output Displacement ................. 0 to 10 or 10 to 0 VDC at 2 mA max or 4 to 20 or 20 to 4 mA (600 Ohm max loop resistance at 24 V) (outputs are userselectable) Velocity ........................... 1 V/inch/sec nominal (10 V max) Nonlinearity ...................... 0.05% of full scale output (max) Nonrepeatability ............... 0.002% of full scale (max) Resolution ......................... Up to 0.002% of full scale Hysteresis .......................... 0.001 inches (max) Frequency Response Low Noise ....................... -3 dB at 10 Hz, -60 phase shift at 10 Hz Servo ............................... -3 dB at 100 Hz, -15 phase shift at 10 Hz (for other frequencies consult factory) Update Frequency Range (inches) ............... (kHz) 6-12 .................................. 6.250 13-29 ................................ 3.125 30-63 ................................ 1.583 64-120 ............................. .781 Operating Temperature Range Probe ............................... -40 to 85C Head ................................ 0 to 70C Storage Temperature Range ................................. -40 to 100C Temperature Coefficient .. 0.007% of full scale per C Span Adjustment Range .. 20% of nominal range Zero Adjustment Range ... 20% of nominal range Ripple Low noise (6 to 120") .... Less than 2 mV rms Servo (6 to 63") .............. Less than 2 mV rms Servo (64 to 120") .......... Less than 10 mV rms User Selectable Analog Output Signals MagneRule PlusTM offers a universal analog output signal that is user-selectable. (Sensor gives feedback of both position and velocity simultaneously.) Users may choose one or all of the following analog outputs when installing the sensor. Displacement Analog Voltage Output 0 to 10 VDC or 10 to 0 VDC at 10 Hz 0 to 10 VDC or 10 to 0 VDC at 100 Hz The standard output, used for most commercial data AC aquisition systems, is derived from a 4-pole, 10 Hz low pass filter. Output provides low noise and low ripple. For relatively fast servo system applications, there is a higher response output derived from a 3-pole, 100 Hz filter which has low phase lag at 10 Hz. Output voltage slope polarity may be reversed by grounding a selected wire. Slope polarity change combined with the standard analog outputs gives 4 different sets of output characteristics: 0 to 10 VDC or 10 to 0 VDC at 10 Hz and 0 to 10 VDC or 10 to 0 VDC at 100 Hz. Slope polarity change is useful when it is necessary to reverse the operating sense of the measurement, as in "topdown" liquid level applications when the magnet/float at the end of the MagneRule PlusTM is equivalent to minimum level or empty. Other applications include "pull" instead of "push" hydraulic cylinder installations and machine tool motion control systems. Displacement Analog Current Output 4-20 mA or 20-4 mA at 10 Hz This 3-wire, 4-20 mA current output is derived from a 4-pole, 10 Hz filter. It is utilized in industrial and process control applications where there are long cable runs between loop power supply, readout equipment or PLC and the sensor. Output slope polarity can be reversed by grounding a selected wire, giving two position outputs: 4-20 mA or 20-4 mA at 10 Hz cutoff frequency. Velocity MagneRule PlusTM offers an uncalibrated velocity output derived from the position output. This analog voltage is normally used for rate feedback stabilization in second order servo systems. Because it is the derivative of the position signal, it is only useful over a limited range of velocities, typically from 0.05 inches per second to 10 inches per second. Consult factory for other ranges. Physical Specifications Probe .................................. 304SS wetted parts, 5000 psi sealed (340 bar) Cover .................................. Anodized aluminum Cable .................................. 10 feet (3m) PVC jacketed O-rings ............................... Viton(R) Magnet Ring ...................... Ertalyre* Viton(R) is a registered trademark of DuPont Internet: www.schaevitz.com North America Tel: 800/745-8008 Document Fax Back: 916/431-6541 Europe Tel: (01753) 537622 106 MagneRule PlusTM Magnetostrictive Linear Displacement Transducer Dimensions in (mm) Measuring Range + 4.50 (114.30) Max Pin Connector Termination 0.36 Max (9.14) 4.40 Max (111.76) 2.0 (50.8) ref Viton O-Rings A 0.43 (10.92) 3/4-16UNF2A 1.290 (32.77) O1.72 (O43.69) Pin Connections A +15 V IN/+24 V IN B Common Ground C Analog Ground D -15 V IN E V Out, 100 Hz F V Out, 10 Hz G Velocity H Current J Reverse (Connect to red or cap off with no connection for standard slope polarity) (Connect to black for reverse slope polarity) K No connection Cable Termination A 0.85 (21.59) Zero Trim Potentiometer Sealing Screw View A-A Zero adjustment 20% of nominal Magnet Ring Assembly range 0.53 dia. (13.5) A 0.152 (3.9) Holes equally spaced on 0.94 dia. (23.9) bolt circle Wt. 13.32 . 2g Ring Magnet Assembly Measuring Range + 4.50 (114.30) Max 2.0 (50.8) ref Viton O-Rings White Red Yellow O.405 (O10.287) Span Trim Potentiometer Sealing Screw 10 ft (3 m) Function V Out, 100 Hz Analog Ground Common Ground Current V Out, 10 Hz Reverse (Connect to red or cap off with no connection for standard slope polarity) (Connect to black for reverse slope polarity) -15 V IN +15 V IN/+24 V IN Velocity Span adjustment 20% of nominal range 1.29 dia. (32.8) 4.40 Max (111.76) Cable Color Brown Blue Black Violet Green Orange 2.5 (63.5) ref A 2.5 (63.5) ref 0.43 (10.92) 3/4-16UNF2A 1.290 (32.77) O1.72 (O43.69) A 0.86 Max (21.84 Zero Trim Potentiometer Sealing Screw 0.85 (21.59) View A-A Zero adjustment 20% of nominal Magnet Ring Assembly range Span adjustment 20% of nominal range O.405 (O10.287) Span Trim Potentiometer Sealing Screw 0.53 dia. (13.5) A 1.29 dia. (32.8) Wt. 13.32 . 2g 0.152 (3.9) Holes equally spaced on 0.94 dia. (23.9) bolt circle Ring Magnet Assembly 107 MagneRule PlusTM Accessory Mounting Kit and Float Assembly Mounting Kit For simplified external sensor installation, mounting kits are available that include appropriate mounting and support brackets, and an open magnet assembly. Magnet Ring/Bracket Assembly Open Magnet Ring To order specify kit: MK-1 (For lengths of <4 feet) MK-2 (For lengths >4 feet) 1.94 (49.28) Screw 6-32 Split Washer 0.257 Dia. (0.653) Magnet Bracket Open Magnet Ring 0.15 Dia. (3.81) 4 Places on 0.94 Radius (23.9) ID = 0.53 (13.5) Tube Bracket 0.31 Thick (7.87) 1.00 (25.4) 0.12 Dia. (3.0) OD = 1.29 (32.8) 0.50 (12.7) 0.26 Dia. (6.60) Magnet Bracket 1.73 (43.9) 1.38 (35.1) #6-32 UNC-28 (2 places) 0.12 (3.05) 1.75 (44.5) 0.88 (22.4) Retainer Band Mounting Kit Assembly 1.72 (43.7) 0.88 (22.4) 0.42 (10.7) 0.12 Dia. (3.05) (4 Places) 0.12 (3.05) in (mm) 0.88 (22.4) 1.75 (44.5) 0.27 (6.9) 0.27 (6.9) 0.75 (19) Note: For MK-2 kits, three tube brackets should be spaced so that each distance x is approximately equal x x x Transducer Bracket Jam Nut 3/4 -16 UNF-2A 0.750 (19.05) Two Extra Brackets Provided in Mounting Kit MK-2 1.94 (49.28) Internet: www.schaevitz.com North America Tel: 800/745-8008 Document Fax Back: 916/431-6541 Europe Tel: (01753) 537622 Magnet Ring/bracket Assembly 108 Retainer band Tube bracket MagneRule PlusTM Magnetostrictive Linear Displacement Transducer Float Kit MagneRule PlusTM can monitor the actual fluid level in a container with the addition of a float kit. The MagneRule's stainless steel rod is positioned directly into the fluid. A spherical float containing an integrated permanent magnet measures the fluid level. The float kit includes a spherical float, retaining collar, and transducer bracket. The entire assembly is mounted vertically. To order specify: FK-1 Float Kit Assembly in (mm) Hex Base Spherical Float Jam Nut 3/4 -16 Transducer Bracket 1.94 (49.28) South End Spherical Float South 62890124-000 Spherical Float 0.55 (14) 2.00 (50.8) Retaining Collar Retaining Collar 0.87 (22.1) 0.75 0.03 (19.05 0.76) 0.37 (94) 0.41 (10.4) 109 MagneRule PlusTM Ordering Information How to Order A standard ring magnet assembly, nonmagnetic mounting screws and hole-location templates are shipped with each MagneRule PlusTM. When ordering please complete model number by specifying unit ouput and measurement range. MRU - 3 Ordering Example: Model Number MRU-3000-012 is a MagneRule PlusTM with a standard (V/in) calibration, standard output, standard cable termination, standard base, and a standard 12 inch range. 0 0 0 -- 012(1) Calibration 3 V/in (standard) V/cm (optional) 4(1) Output 0 User-selectable analog outputs (standard) Termination 0 Cable Termination (standard) 2 Connector termination (optional) Base 0 1 Imperial mounting hole dimensions (standard) Metric mounting hole dimensions (optional) Unit Range(1) Specify range from 6 inches (006) or 15 cm (015) to 120 inches (120) or 305 cm (305) Code Inches Code Centimeters 006 6 inches (standard) 015 015 cm (standard) 012 12 inches (standard) 031 030 cm (standard) 018 18 inches (standard) 045 045 cm (standard) 024 24 inches (standard) 061 061 cm (standard) 030 30 inches (standard) 076 076 cm (standard) 036 36 inches (standard) 091 091 cm (standard) 048 48 inches (optional) 122 122 cm (optional) 060 60 inches (optional) 152 152 cm (optional) 072 72 inches (optional) 183 183 cm (optional) 084 84 inches (optional) 213 213 cm (optional) 096 96 inches (optional) 244 244 cm (optional) 108 108 inches (optional) 274 274 cm (optional 120 120 inches (optional) 305 305 cm (optional) (1) For metric calibration (V/cm), unit range is specified in centimeters. Internet: www.schaevitz.com North America Tel: 800/745-8008 Document Fax Back: 916/431-6541 Europe Tel: (01753) 537622 110