731A/P31 seismic accelerometer system

Product catalog summary

Overview: The document provides technical specifications and features of the Model 731A seismic accelerometer and Model P31 power amplifier system, designed by Wilcoxon Research Inc. It includes details on dynamic performance, electrical characteristics, environmental limits, and physical attributes.

Specifications:

Dynamic: The system offers selectable acceleration sensitivity of 10, 100, 1000 V/g and velocity sensitivity of 0.1, 1, 10 V/in/sec. It supports a maximum vibration range of 0.5 G peak with amplitude nonlinearity of 1%.
Frequency Response: The system includes filters for different frequency ranges, with a -10% response from 0.08 to 70 Hz and a -3dB response from 0.05 to 100 Hz.
Electrical: The output impedance is 2500 Ω, with a recommended load impedance of over 250 kΩ. The maximum output voltage is 5 V peak, and noise levels are specified at various frequencies.
Environmental: The operating temperature range is -10 to 65°C, with a vibration limit of 10 g peak. The system is noted as fragile under shock conditions.
Physical: The Model 731A weighs 670 grams, and the Model P31 power unit weighs 600 grams. The sensing element design utilizes PZT ceramic/flexure.

Features:

Ultra-high sensitivity and ultra-low-noise electronics for clear signals at sub micro-g levels.
Capability for low-frequency measurements and low-pass filtering to eliminate high frequencies.
Equipped with ESD and mis-wiring protection.

Connections: The document provides detailed connection instructions for the Model 731A and Model P31, including cable functions and connector types.

Accessories: Supplied accessories include an SF7 mounting stud and calibration data (level 3).

Catalog excerpts

Model 731A/Model P31 system Seismic accelerometer and power amplifier Dynamic • Ultra high sensitivity • Ultra low-noise electronics for clear signals at sub micro-g levels • Low frequency capable • Low pass filtered to eliminate high frequencies • ESD protection • Mis-wiring protection Power unit/amplifier Note: Special handling required due to sensitivity Accessories supplied: SF7 mounting stud; calibration data (level 3) Wilcoxon Research Inc 21 Firstfield Rd Gaithersburg, MD 20878 USA Model P31 power unit www.meggitt.com Model 731A transducer readout equipment Powering with

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Connector shell A B shell pin Function case power / signal common common signal Cable Shield white black shield center conductor Connector shell pin socket Function ground power/signal common Cable shield white black

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