The model 99100A Capacitor Reference System comprises a number of highly stable hermetically sealed capacitors with a switch array and a variable high voltage supply. The unique design allows the instrument to be used as a reference for ratio calibration of capacitance measurement instruments in addition to being used reference capacitors. Provision is made for an additional external reference capacitor and also for additional extension of the switched array range with another bank of reference capacitors.


  • Supports 9910A Capacitance Bridge
  • Ratio Transfer Uncertainty Low as 3 ppm for Calibration Ratios from 1:1 to 100:1
  • Calibration Uncertainty ±10 ppm and Stability < 20 ppm
  • Temperature Coefficients < 4 ppm/°C
  • Working Voltage to 800 Vrms With Very Low Voltage Coefficients