beautypg.com

E.4 calibration – Campbell Scientific CS110 Electric Field Meter User Manual

Page 68

background image

Appendix E. CS110 as a Slow Antenna

E-6

E.4 Calibration

The factory calibration described in Section 5 applies to the maximum
amplitude of the step response of the CS110 when it is operating as a slow
antenna. Switching in the 200 M

Ω 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 volts * meter

-1

* 20 ms

-1

.