1. Introduction
The CS110 Electric Field Meter measures the electric field and forecasts the likelihood of lightning.
In general, the higher the electric field, the greater probability for lightning.
The CS110 has a measurement range of -25,000 to 25,000 V/m and makes measurements every
second. It can detect both cloud-to-ground and cloud-to-cloud lightning strikes within a 25-mile
radius. Lightning strike detection efficiency is 95% within 5 miles, 93% within 10 miles, and 68%
within 20 miles.
Unlike traditional rotating-vane field mills, the CS110 uses a reciprocating shutter that opens and
closes by 45° during measurements. The reciprocating shutter is electrically connected to ground
potential by a flexible stainless-steel strap, resulting in an ultra-reliable electrical ground
connection. By using a zero-field (closed shutter) reference for each measurement, the CS110
offers an improved dc error performance over traditional rotating-vane field mills.
2. Precautions
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READ AND UNDERSTAND the Safety section at the front of this manual.
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Atmospheric or local electric field conditions or different site characteristics may cause false
information, late data, or otherwise incomplete or inaccurate data. The CS110 only
measures conditions that make lightning more likely. Just as with weather forecasts, the
CS110 measurements only help assess the probability of lightning. Lightning can occur
causing personal injury, even death, or damage to property without any warning from the
CS110. Campbell Scientific is not liable for special, indirect, incidental, or consequential
damages from the use, failure, or malfunction of the CS110. See Limited Warranty (p. 1) for
more information.
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DONOT install the lightning rod included with the tripod, as it will adversely affect CS110
measurements.
2.1 Lightning safety
Lightning warning devices fall into two classes: lightning detectors and electric field monitors.
Stand-alone lightning detectors, such as the SG000, provide warning based on nearby
discharges, but give no warning until a detectable discharge occurs. Electric field monitors
measure the atmospheric electric field, indicating the presence of nearby electrified clouds
CS110 Electric Field Meter 1
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