Campbell Scientific CS110 Electric Field Meter - Manual (Page 25)

CS110 Electric Field Meter
An upward-facing calibration kit (PN: 17579) was developed to hold the
CS110 in a flush-mounted upward-facing position, as illustrated in Figure 10.
FIGURE 10. CS110 attached to upward-facing flush-mounted plate for
site correction
Both the upward-facing and the inverted and elevated unit need
to be electrically connected to Earth potential. This can best be
accomplished by a grounding rod and wire connected to ground
lugs provided on both the upward-facing plate and on the
mounting bracket on the standard CS110. NOTE
Ideally, site correction should be done in the absence of precipitation, and
during the presence of slowly varying electric fields of bipolar polarity and
magnitudes large enough to make instrument offset errors negligible. These
conditions may be infrequent in practice, making site correction using a flush-
mounted upward-facing unit somewhat challenging. Falling precipitation
along with blowing dirt can result in questionable measurements by an
exposed, upward-facing unit. Cleaning of the electrodes of an upward-facing
unit is recommended after it has been exposed to blowing dust and/or falling
precipitation. The measurement of meteorological parameters such as rainfall,
along with the averaging and data storage capability of the CS110 can be
17