Campbell CS110 - Page 71

Switching in the 200 MΩ resistor in the feedback path simply slows the decay of the signal
induced on the sense electrode resulting in a 66 millisecond decay time constant. The CS110
operating as a slow antenna returns the change in the electric field with units of volts per meter
per scan. A 50 Hz scan interval would yield: ( X V/m)/(20 ms).