BBAS-2 Accelerometer using the Electro-mechanical integration design, Force-balanced and Electronic-feedback technique features good linear, broad frequency band and large dynamic range. It as well as its relative circuits which includes Electronic-feedback circuit, Calibration circuit, balanced output driving circuit and isolated DC/DC transducer is installed in a aluminium sealed case.

BBAS-2 has got specially-designed level regulation bolts as well as a level bubble to be used to regulate the horizontal orientation, and a centered mount hole through which only one bolt can fix up itself, which makes the installation very simple and reliable. It is also very convenient to realize the testing and calibration towards the accelerometer from the data recorder in the distance.

Applications
Strong motion observations at Free Field, building-structure observations, artificial blast observations, site safety evaluation and low-frequency vibration measurements at dams, large bridges, railway stations and tunnels etc.

Specifications
Structure
3-Components
Measure Range
± 4G
Full Scale Output
± 5V
Sensitivity
2.5 V/g (0.2549 Vs2/m)
Cross Axis Coupling
< 1 %

Dynamic Range
> 135 dB(above 0.01Hz)
Natural Frequency
DC~80 Hz
Linear
0.1 %
Zero-point Excursion
0.0005g/degree
Calibration Input
± 5V(Maximum)
Dumping
Critical damping 0.6~0.8

Cross Axis Sensitivity
0.03G/g Max
Power Supply
8V~30V Single Source
Static Current
35 mA@12V
Dimensions
120 mm × 120 mm × 65 mm
Weight
about 2kg