Charge amplifier A. Max input quantity of electric charge is: 50000 pC. B. Charge amplifier adjust way is: three position dialing digital display, error percentage is: <1％ C. Frequency range(-3dB): acceleration 0.3Hz-100kHz, speed : 1Hz-10kHz, displacement: 1Hz-1kHz D. Max output voltage: ±5Vo-p E. Measurement error:acceleration<1％; speed:<2％; displacement: <4％ F. Low-pass filter limiting frenquency(-3dB):five range: 00kHz、30kHz、10kHz、3kHz、1kHz;; rate of decay: 12db/oct G. Noise level: <10-2pC when reduced to input terminal on the base 1nF sensor capacitance sensortivity. H. Using environment: temperature 0-40℃,humidity is: 0-80％RH