731A/P31

731A/P31 is a seismic accelerometer and power/amplifier system. It incorporates an isolated piezoelectric sensing element which minimizes the effects of transverse motion, base strain, and thermal transients. This accelerometer also contains a proprietary solid state charge amplifier with an extremely low noise floor. This enables the sensing of low level vibration with a device which has a sensitivity of 10V/g. This P31 power unit/amplifier is specifically designed to further enhance the capabilities of the 731A seismic accelerometer by providing signal amplification, selective filtering, and signal processing to yield user-selectable acceleration or velocity output signals. It also provides the constant current needed to power the accelerometer’s internal amplifier. The P31 is battery powered, using two standard 9 volt alkaline transistor batteries with an operating life of approximately 75 hours.

• Ultra low-frequency measurement, power amplifier with gain levels 1X, 10X, 100X
• Integrated velocity signal, sensor-power supply interconnecting cable included
• Sensitivity tolerance is ±10%
• 0.05Hz to 450Hz ±3dB frequency response
• 3/8-16 tapped hole mounting thread
• MIL-C-5015, 2-pin connector style
• 0.5g peak full-scale range
• 750Hz resonance frequency
• Operating temperature range from -10°C to +65°C

Contents

Seismic accelerometer and power/amplifier system, SF7 mounting stud, R6-2T-J9-10 cable assembly.