Platinum Series
User Configurable 0 to ±5 g
Smart Accelerometer Systems
Technical Data*
Inertial Measurements Made Fast and Easy
![[Picture of Platinum Series Smart Accelerometer System]](35203A.gif)
Summit Instruments Platinum Series Smart Accelerometer Systems are
complete, easy-to-use, user-configurable Acceleration Measurement Systems
containing one, two or three accelerometers, a temperature sensor, signal
processor, IRIG-106 PCM encoder, RS485 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 RS485
command processor. 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.
Features and Benefits
- User Configurable Settings
The analog/digital output range and low-pass filter of each Platinum
Series accelerometer axis can be set via built-in RS485 interface
as can optional IRIG-106 encoded PCM output settings (channel word,
subcommutation, word size, NRZ-L/RNRZ-L/Bi-Phase-L/RBi-Phase/RS485
encoding).
- Compensated Serial, Telemetry and Analog Outputs
Calibrated, ranged and filtered data can be streamed out at up to
3Mbit/sec via RS485 or IRIG-106 encoded PCM. 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 over
the -40 to +85°C temperature range.
- Built-in Calibration
Calibration data for each sensor is maintained in the accelerometer.
- Self-Test
Self-test commands help verify channel integrity and wiring connections.
- Small Size
Complete conditioned uniaxial/biaxial/triaxial accelerometer with
digital signal processing in two cubic inches.
- Built-in Power Supply Regulation
Unregulated DC power from +8 to +30 volts is all that is required
to measure accelerations on all axes. Platinum Series Smart Accelerometer
Systems are ideal for automotive applications as they survive both
continuous reverse battery to -20V and load dump transients to +60V.
- 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
RS485 pins on up to 30 Platinum Series Smart Accelerometer Systems.
Tapped holes on bottom and back simplify horizontal or vertical mounting.
- Suitable for Harsh Environments
Platinum Series Smart Accelerometers are robust and can be used in
harsh environments, they survive 500 g powered and 1000 g unpowered.
Specifications
Ta = Tmin to Tmax, Acceleration = 0 g, unless otherwise noted.
Parameter Min Typ Max Units Conditions/Notes
Accelerometer(s)
Maximum Full Scale Range ±5 ±7 g On each axis,
User configurable
Sensitivity Drift ±0.5 % % of sensitivity at 25°C
25°C to Tmin or Tmax
Zero G Drift ±0.2 g Repeatable,
can be compensated
25°C to Tmin or Tmax
Alignment ±2.0 degrees Deviation from ideal,
can be compensated
Transverse Sensitivity 0.25 % Inherent sensor error,
excluding misalignment
Nonlinearity 0.2 % FSR Best fit straight line
Upper Cutoff Frequency 1¹ 1000¹ 10000¹ Hz ±10%, user configurable
Noise Density 0.225 0.325 mg 4 Hz to 1 kHz
sqrt(Hz)
Noise Amplitude 2.25 mg rms DC to 100Hz
Temperature Sensor
Range -55 125 °C
Resolution 0.25 °C
Accuracy ±2 ±3 °C Ta = -40 to 85°C
Digital Signal Processor
Internal Word Size 32 bits
Sensor Scan Rate 42500 Hz User configurable
Analog Outputs
Voltage Swing 0.25 4.75 V Iout = 5 mA
Impedance to Analog- 100 130 220 Ohm
Nonlinearity 0.15 % FSR Excluding sensor
nonlinearity
Digital Output Word Size 16 bits Filtered, gained and
calibration corrected
IRIG-106 PCM Output Rate 3 Mbit/sec Based on NRZ,
user configurable
Power Supply (Vs)
Input voltage limits -20 +60 V -20 V continuous,
>30V if <100ms,duty <1%
Input voltage - operating +8 +30 V
Input current 50 mA
Rejection Ratio 80 120 dB DC
Temperature Range (Ta) -40 +85 °C
Shock survival
Powered -500 +500 g Any axis for 0.5 ms,
Recovers on power cycle
Unpowered -1000 +1000 g Any axis for 0.5 ms
Mass 78 grams
¹ User configurable low-pass filter 3dB cutoff (number poles configurable)
Mechanical
![[Platinum Series Smart Accelemeter System Dimensions]](X520XAM.gif)
Connections
![[Platinum Series Smart Accelerometer System Connectors]](X520XAC.gif)
Pin 1 2 3 4 5 6 7 8 9
Signal Analog1+ Analog2+ Analog3+ Signal- RS485- RS485+ Aux +Vs Gnd
Wire Brown Red Orange Yellow Green Blue Violet Grey White
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Data Sheet
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