45CA Charge Amplifier The 45CA Charge Amplifier conditions and amplifies charge-mode accelerometer signals. It is a rugged device designed to be used in engine test cells and other environments where charge-mode accelerometers are used to measure machinery vibration. Each 45CA Charge Amplifier provides one (1) channel of charge amplification, and provides a buffered acceleration output signal as well as an integrated (velocity) signal output. Outputs may be configured (at the MTI Instruments factory) for either differential or singled ended configurations, for optional highpass filter settings, and for one of three different gain settings to match accelerometer sensitivities. INPUTS Differential Input Input Connection Input Impedance Maximum Input Charge DC Power CONFIGURATION OPTIONS Static discharge protected Differential with shield connected to case, MS3101E-10SL-3P 10Ω maximum 16,000 pC pk, maximum 20 – 30 volts DC OUTPUTS - Outputs are normally differential, factory option single ended Velocity Output Acceleration Output (buffered) Output Impedance Capacitance Load DC Output Bias Linear Output Voltage Output Current Linearity Residual Noise (RTD) DB-9 connector DB-9 connector 10Ω maximum 0.1µF maximum 0 Vdc 17Vpk-pk max 25 mA maximum 2% 1.0 mV RMS maximum at gain =1, 4.0 mV RMS max at gain = 10. Channel gain settings: Highpass filter options: Outputs (ACC & VEL): 1, 4, 10 mV/pC 10, 15, 20, 25 Hz Differential or Single Ended PHYSICAL CHARACTERISTICS Dimensions Weight Case Material Mounting 1.6” H X 2.6” W X 4.77” D (40.6 mm x 66 mm x 121mm) 8 oz. Aluminum DIN rail standard Flange mount optional 325 Washington Avenue Extension Albany, NY 12205 USA