Campbell-scientific CS110 Electric Field Meter Manuel d'utilisateur télécharger pdf (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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Campbell-scientific CS110 Electric Field Meter Manuel d'utilisateur Page 44