6.2 Installing the CS110
Accurate electric field measurement is dependent on a site calibration factor, C
site
. To maintain
C
site
validity, adhere to the following guidelines:
l
Nothing should be beneath the CS110.
l
Ensure the CS110 is facing the ground and not a tripod leg, solar panel, or enclosure.
l
Mount the CS110 with its top 25.4 cm (10 in) below the top of the mast and with its face
(where the shutter is) at 2 m (78.75 in) above the ground.
Tighten the mounting bolts to fasten it to the mast.
6.3 Power considerations
The stepper motor is powered off much of the time, reducing power consumption, making
economical remote solar power feasible. The average electric field meter current is a function of
the measurement rate. The data logger program can implement variable sample rates based on
measured results to conserve power for solar powered applications. For example, the data logger
program can measure electric field at a 10-second rate during fair weather conditions, and
automatically switch to 1-second measurements during threatening conditions. An example
variable sample rate program is available at www.campbellsci.com/downloads/cs110-programs.
Like the stepper motor, communication devices that are turned off when not needed, can offer
low average power consumption.
The CS110 requires 11 to 16 VDC with a peak current demand of 750 mA during motor operation.
The CS110CBL3-L connects a DC power supply to the CS110 POWER connector; maximum length
CS110 Electric Field Meter 8
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