GeoSIG AC-43 Accelerometer

Key Features

  • Full Scale: ± 2 g (± 0.625, 1, 4, 5 g optional)
  • Bandwidth DC to 100 Hz
  • MEMS Accelerometer
  • High accelerations measurement
  • High shock survivability
  • Large temperature range
  • High lifetime stability
  • Cost effective sensor
  • Low power consumption
  • Simple test and calibration
  • Single Bolt Mounted Enclosure provides up to ± 10° of Leveling Adjustment
The AC-43 sensor package is a triaxial accelerometer designed for urban and industrial applications regarding strong motion earthquake survey and vibration monitoring as well as alarm and switch systems. All these applications require rugged sensors with minimum maintenance and a simple method for periodic testing.

The AC-43 accelerometer is based on the modern MEMS (Micro Electro-Mechanical Systems) technology, consisting of sensing cells assembled in a way that optimizes their performances. This combined with the state of the art proprietary circuit design yields this cost effective and reliable accelerometer. MEMS cells include linear accelerometer sensing elements which measure the capacitance variation in response to any movement or inclination and a factory trimmed interface chip that converts the capacitance variations into analog or digital signal proportional to the motion.

The DC response allows the sensor to be easily repaired, tilt tested or recalibrated in the field. With the help of the TEST LINE, the AC-43 accelerometer can be completely tested assuring proper operation. The AC-43 is typically housed in the standard GeoSIG sealed cast aluminium housing with dimensions of 195 x 112 x 95 mm. The housing also incorporates a single bolt mount with three levelling screws. Stainless steel packaging options are available. The AC-43 accelerometer is directly compatible with the GeoSIG recorders. It is also designed to be mounted internally in standard GeoSIG recorders.
  • General Characteristics

  • Application
  • Strong Motion earthquake recording,  Vibration monitoring, Alarm / Switch Systems
  •  
    Configurations: Triaxial Biaxial Uniaxial Axes Alignment**
    AC-43 or AC-43i* X     X – Y – Z H – H – V
  • * i : Internal sensor   ** H: Horizontal, V: Vertical
  • Full Scale Range:
  • ± 2G std, optional ± 0.625, ± 1, ± 4 or ± 5G
  • Sensor Element

  • Type:
  • MEMS Force Balance Accelerometer
  • Dynamic Range:
  • > 120 dB correlated mean RMS noise amplitude (per-bin) with respect to 5 g full scale
  • Noise:
  • < 110 ugRMS for x and y axis, and < 225 ugRMS for z axis
  • Nonlinearity:
  • < 0.3 % typ., < 0.6 % for vertical
  • Cross Axis Sensitivity:
  • < 2 % typ
  • Bandwidth:
  • DC to 100 Hz
  • Offset Drift
  • ± 0.8 mg / °C
  • Span drift:
  • 100 ppm/0C
  • Full Scale output:
  • 0 ± 10 V differential (20 Vpp)
    optional 2.5 ± 2.5 V single-end (5 Vpp)
    0 to 20 mA current loop
  • Measuring Range
  • See Plot
  • Power

  • Power supply voltage:
  • 7 to 15 VDC, single supply
  • Consumption:
    • 75 mA @15 VDC
  • Connector:
  • Metallic, Shielded, IP67, 12 pins, male optional MIL, Bendix PT07A 14-19P
  • Mating:
  • Binder / Coninvers type RC
  • Overvoltage Protection:
  • All pins are protected
  • Connector Pin Configuration

  • Pin 1-2, 3-4, 5-6:
  • Signal output for axis X, Y, Z
  • Pin 7-8:
  • Test input (0 / 12 V)
  • Pin 9-10:
  • +12 VDC Power Supply
  • Pin 11-12:
  • Not used
  • Case:
  • Shielded Ground
  • Environment/Housing

  • Housing Type:
  • Cast aluminium
    Sealed access cover
  • Housing Size:
  • 195 x 112 x 95 mm
  • Weight:
  • 2.0 kg
  • Index of Protection:
  • IP 65
    optional IP68
  • Temperature Range:
  • - 40 to 85 °C (operating)
    - 40 to 85 °C (non-operating)
  • Humidity:
  • 0 to 100 % (non-condensing)
  • Orientation:
  • Can be configured for mounting in any position.
  • Mounting
  • Single bolt, surface mount, adjustable within ± 10°
  •  
  • Standard AC-43

  • Floor mounted, Full scale ± 2 g,2 m cable with cable inlet and recorder mating connector, concrete anchor bolt and user manual on CD
  • Options

  • Cable & connector:
  • Cable connector Metallic, Shielded, IP67, 12 pins, male optional MIL, Bendix PT07A 14-19P Cable with shielded twisted pairs for any length (including mating sensor connector) with open end Cables for connection to GeoSIG recorder Connector on user specification mounted at cable end
  • Housing:
  • Watertight IP 68 housing 
  • Mounting:
  • Wall mounted
  • **Specifications subject to change without notice