P31

Ultra low noise power unit/amplifier P31 SPECIFICATIONS INPUT CHARACTERISTICS Voltage to transducer 18 VDC Current to transducer, ± 20% 2.4 mA Maximum input voltage (gain = 1) 3.5 V rms OUTPUT CHARACTERISTICS Output impedance, nominal 2.5 kΩ Recommended load impedance >250 kΩ Maximum output voltage 3.5 V rms Spectral noise, 1-10 Hz, referred to input < -140 dB Key features • Amplifies signal x1, x10, x100 • Switchable output - acceleration or velocity • Powers 731A accelerometer • Manufactured in ISO 9001 facility TRANSFER CHARACTERISTICS Gain acceleration 1, 10, 100 V/V Output sensitivity : 1 Acceleration  Velocity 10, 100, 1,000 V/g 0.1, 1, 10 V/in/sec Gain accuracy ± 0.25 dB Frequency response, –3 dB: Acceleration (450 Hz filtered) Acceleration (100 Hz filtered)  Velocity 0.05 - 450 Hz 0.05 - 100 Hz 0.8 - 150 Hz Amplitude nonlinearity