Model 2430

DESCRIPTION

The Model 2430 triaxial accelerometer module combines three orthogonally mounted Model 1210 analog capacitive accelerometers with high drive, low impedance, buffering for measuring accelerations in commercial and industrial environments. It is tailored for zero to medium frequency instrumentation applications. Each of the three internal accelerometers contains a miniature, hermetically sealed micromachined capacitive sense element and a custom integrated circuit sense amplifier.  The anodized aluminum case is epoxy sealed and is easily mounted via two #8 (or M4) screws.  Unlike other designs, on-board voltage regulation and an internal voltage reference eliminates the need for precision power supplies. In addition, the 2430 includes an instrumentation amplifier on each axis. No power supply current flows through the OUTPUT REF wire; this input is used only as a reference for the acceleration outputs. This design reduces cross talk among the three channels and the unit rejects noise due to voltage differences between the user's data acquisition equipment ground and the power supply ground. The 2430 is relatively insensitive to temperature changes and gradients and its frequency response includes DC.  An optional initial calibration sheet (2430-CAL) and periodic calibration checking are also available.

ORDERING INFORMATION

OPERATION  

The Model 2430 produces three analog voltage outputs which vary with acceleration. The Z axis is perpendicular to the bottom of the package, with positive acceleration defined as a force pushing on the bottom of the package. The X and Y axis directions are marked on the cover with positive acceleration defined as acceleration in the direction of the axis arrow. The outputs are single ended and vary with respect to the voltage at the OUTPUT REF input which should be approximately centered between the +V_S and -V_S supply voltages. The output scale factor is independent of the supply voltages from 12 to 15 volts. At zero acceleration, the output voltage is nominally zero volts; at ± full scale acceleration the output voltage is ± 5 volts respectively.

SIGNAL DESCRIPTIONS

+V_S (power): Reddish brown wire. Apply +11 to +15 Volts DC with respect to OUTPUT REF.

-V_S (power): Black wire. Apply -11 to -15 Volts DC with respect to OUTPUT REF.

OUTPUT REF (input): White wire. The X, Y & Z outputs are referenced to this potential. This input is usually tied to a potential halfway between the +V_S and -V_S voltages. This input may also be used to offset the output however, the voltage difference between this input and either supply voltage (+V_S or -V_S) must be greater than or equal to 11 Volts.

X, Y & Z (outputs): Green, light brown and light blue wires respectively. These analog output voltages are proportional to acceleration; they increase with positive acceleration and decrease with negative acceleration. At zero acceleration, the output is nominally equal to zero volts with respect to OUTPUT REF.

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