Accelerometer Pod - eDAQ - #1

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WARRANTY: eDAQ Hardware units are supported by a one year warranty www.eDAQ.com E-mail: info@edaq.com e-corder is a registered trademark of eDAQ Pty Ltd. All other trademarks are the property of their respective owners. PT8/03 Specifications * Extendable to 20 kHz on special order Accelerometer Pod (Model EP312) Document Number: M-EP312-0606 Copyright © eDAQ 2006 Description A compact signal conditioner for use with an e-corder unit, providing a continuous AC coupled signal from PCB Piezotronics ICP® accelerometers, microphones, vibration and related sensors requiring a constant current supply. See www.pcb.com for suitable sensors. Theory of Operation An ICP® sensor comprises a charge generator the output of which is proportional to acceleration. This charge, applied to the gate of the FET varies its output impedance. A constant current applied to the output impedance produces a voltage signal proportional to the acceleration. (See block diagram, below.) • Software-controlled • Plug and play installation with e-corder • ±20 V input range • Accepts most ICP® transducers • Calibrate in user–defi ned units Input impedance: 1 MÙ ± 1% Coupling capacitor: 1ìF Current source: 4 ± 0.01 mA Constant current compliance: 33 ± 1 V Gain: 0.0998 – 0.1002 Maximum input: ±20 V Maximum output signal: ±2 V High pass filter: 0.16 Hz, 1st order Low pass filter: 10 kHz*, 3rd order Bessel Frequency response: 0.16 — 10 kHz* Amplifier noise: < 1 ìV pp, 0.1 – 10 Hz Input connection: BNC connector Dimensions (l x w x h): 108 x 58 x 35 mm (4.25" x 2.28" x 1.38") Weight: ~200 g (7 oz) eDAQ Pty Ltd reserves the right to alter these specifications at any time. Stacking and Unstacking Pods Pods stack by clicking into place on top of each other. To separate stacked Pods, push the top Pod towards the back and then pull them apart from the back (See picture on right.) ...... ............ ...... .......... ................ .......... .......... .................. .................................... ........ .............. ............ .................... ...... .......... ......Ù ....ì..