Signal calibrator 2947C

precision

Key features •Allows simulation of a piezoelectric transducer charge output •Precision 1000 pF shielded capacitor •Used for charge amplifier calibration •Converts voltage to charge •Easy to use The Endevco® model 2947C is a stable, precision, 1000 pF shielded capacitor designed specifically for calibrating charge sensing amplifiers.The voltage output from a signal generator is readily converted to a charge signal by connecting a capacitor in series between the generator and charge amplifier. The transfer function is: Q = EC Where: Q = Charge, in picocoulombs (pC) E = Voltage, in volts (V) C = Capacitance, in picofarads (pF) Since the capacitor is exactly 1000 pF, the transfer function simplifies to Q (pC) = E (mV). The charge must be expressed in units of pC pk if the voltage is expressed in peak units. Similarly, voltage rms converts to pC rms.