PRELIMINARY 15208A 25208A 35208A Uniaxial Digital Accelerometers User Configurable ±250 g, ±500 g Wide Bandwidth to 10 kHz Biaxial Triaxial 8A This Measurement Specialties product is subject to U.S. Export Law. Technical Data* Features and Benefits User Configurable Settings The analog/digital output range and low-pass filter of each digital accelerometer axis can be set via a built-in RS-485 interface using a free, downloadable Instrument Configuration Utility (ICU). An RS-485 to RS-232 adapter is available. RS-485 Serial and Analog Outputs Calibrated, ranged and filtered data can be streamed out at up to 3 Mbit/ sec via RS-485. Analog output of up to three calibrated, ranged and filtered channels are provided for compatibility with existing systems. High Accuracy and Linearity over Wide Temperature Range Accelerometer accuracy is improved by minimizing variations due to temperature and aging effects. Each axial sensor has been tested and compensated over the -40 to +85°C temperature range. Built-in Calibration Calibration data for each sensor is maintained in the accelerometer. All digital data output is fully calibrated and easily converted to user specified engineering units. Self-Test Self-test commands help verify channel integrity and wiring connections. Small Size Complete conditioned uniaxial, biaxial and triaxial accelerometers with digital signal processing in just two cubic inches. uilt-In Power Supply Regulation B Continuous unregulated DC power from +8.5 to +36 volts is all that is required to measure accelerations on all axes. Reverse power voltages of up to -80 V can be withstood indefinitely. Transients of +80 V for 550 ms compatible with MIL-STD-704A can be withstood with full operation. Easy Installation with Minimal Wiring Requirements A built-in terminal block or cable with 9-pin connector simplifies wiring. Wiring can be minimized by daisy-chaining the two multidrop RS-485 pins on up to 30 digital accelerometers. Tapped holes on bottom and back simplify horizontal or vertical mounting. Suitable for Harsh Environments These accelerometers are robust and can be used in harsh environments, surviving 1500 g powered or unpowered. Warranty Measurement Specialties digital accelerometers come with a three-year factory warranty. 15208A.25208A.35208A Digital Accelerometers precisionsensors.meas-spec.com Inertial Measurements Made Fast and Easy These Measurement Specialties digital accelerometers are complete, easy-touse, user-configurable sensors containing one to three accelerometers, a temperature sensor, signal processor, RS-485 interface and three analog outputs in a small, easy-to-install package. All channels are sampled simultaneously to avoid data skewing. The digital signal processor takes 16-bit samples, filters, ranges, and calibration compensates at up to 42,500 samples/sec/channel. Digital data can be streamed out at up to 3 Mbit/sec. The output range, filter frequency and calibration of each channel, as well as telemetry configuration, can be set by the user via the RS-485 command processor. CRC-8 and CRC-16 error checking is used to ensure command and data integrity. The built-in temperature sensor can be used by critical applications to correct for any residual temperature effects. 2236 N. Cleveland-Massillon Road Akron OH 44333 PH : 330-659-3312 8/2/2013 www.meas-spec.com PRELIMINARY Specifications for 15208A, 25208A and 35208A - improved specifications available upon request Ta = Tmin to Tmax; acceleration = 0 g unless otherwise noted; within one year of calibration. Parameter Min Typical Max Units Accelerometer Full Scale Range Option R250 Option R500 ±250 ±500 g g Sensitivity Drift 25°C to Tmin or Tmax 1% (TBD) % Percent of sensitivity at 25°C Zero g Drift 25°C to Tmin or Tmax ±1.5 g Some units to 3 g Alignment ±3.0 degrees Transverse Sensitivity 0.25 Nonlinearity 0.2 % 2 % FSR Deviation from ideal axes Inherent sensor error, excluding misalignment Best fit straight line Noise Density Temperature Sensor Range Resolution Accuracy -55 0.25 ±2 Digital Signal Processor Sensor Scan Rate Analog Outputs Voltage Swing Impedance to Analog Nonlinearity 0.25 100 130 Digital Output Word Size 16 bits Filtered, gained and calibration corrected Power Supply (Vs) Input Voltage Limits Input Voltage - Operating Input Current Rejection Ratio -80 +8.5 50 >120 +80 +36 V V mA dB -80 V continuous, >38 V if <550 ms, duty <1% Temperature Range (Ta) -40 +85 °C Terminal block Option T000 rated to -30°C Mass 0 kHz 2.8 125 ±3 °C °C °C Ta = - 40 to +85°C 42,500 Hz User configurable, channels processed in parallel 4.75 220 0.15 0.494 [12,55] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 0.354 [9,00] 3 mm x 0,5 mm Thread 0.138 [3,50] Deep 16 Places on 2 Views 0.575 [14,60] 0.354 [9,00] 1 1.437 3 [36,50] V Ω % FSR Configurable to sensor Iout = 1 mA max Excluding sensor nonlinearity DC grams 0.167 0.354 [4,25] [9,00] Lower filter cutoffs are user configurable mg/√Hz 10 Hz to 400 Hz 78 Mechanical Lower ranges are user configurable Frequency Response 10† Shock Survival ±1500 ±1500 †User configurable low-pass filter 3dB cutoff (number poles configurable) Conditions/Notes 0.240 [6,10] g Any axis for 0.5 ms, powered or unpowered Connections T000 T004 Pin 1 2 3 4 5 6 7 Signal Analog1+Analog2+Analog3+ Signal - RS485- RS485+ Aux Wire Brown Red Orange Yellow Green Blue Violet 9 Gnd White 3 1 2 2 0.689 [17,50] 2.049 [52,05] Rear View Bottom View Spring and cable added with cable options 0.187 [4,76] Ordering Information 35208A Dimensions in inches [mm] R500 T004 C002 Instrument 35208A 25208A 15208A Accelerometer R500 : ±500g 10kHz R250 : ±250g 10kHz Mounting adapters (sold separately) Termination T004 : 4 ft. cable with DB9M T000 : Terminal Block Tnnn : Custom length, nnn ft. 35170A Horizontal 15208A.25208A.35208A Digital Accelerometers precisionsensors.meas-spec.com 8 +Vs Grey 35172A Vertical Calibration C001 : Standard room temp cal only C002 : C001 cal plus offset data over -40 to +85°C range 2236 N. Cleveland-Massillon Road Akron OH 44333 PH : 330-659-3312 K11 Adapter 0 : None 1 : 35170A Horizontal mounting adapter 3 : 35172A Vertical mounting adapter Interface kit 0 : None 1 : Interface kit with US power supply 2 : Interface kit with int’l power supply 3 : Interface kit for terminal block (US) 4 : Interface kit for terminal block (int’l) 8/2/2013 www.meas-spec.com