4 cleaning the cs110 electrode head – Campbell Scientific CS110 Electric Field Meter User Manual
Page 44
CS110 Electric Field Meter
10.4 Cleaning the CS110 Electrode Head
The CS110 motor assembly illustrating the 316-L stainless-steel stator, shutter,
and sense electrode is illustrated in Figure 13.
Stator
Insulator
Shutter
Base Plate
Sense Electrode
FIGURE 13. CS110 stator, shutter and sense electrode
Contamination of the polished stator, shutter, and sense electrode can result in
unwanted surface charges that induce electric field offset errors in the
measurement.
Three Teflon insulators are utilized to electrically insulate the high-impedance
sense electrode from the motor assembly base plate. Surface contamination of
these insulators can result in excessive leakage current. The CS110 includes a
circuit to compensate for input leakage current on the charge amplifier up to
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