Electrostatic Discharge And Lightning Protection - Campbell CR300 Series Product Manual

1. Insert the included nylon anchors into the backplate. Position them to align with the
mounting holes on the base of the data logger.
2. Holding the data logger to the backplate, screw the screws into the nylon anchors.
See also Physical specifications (p. 240).
20.7 Electrostatic discharge and lightning
protection
WARNING:
Lightning strikes may damage or destroy the data logger, associated sensors and power
supplies.
Electrostatic discharge (ESD) can originate from several sources, the most common and
destructive are primary and secondary lightning strikes. Primary lightning strikes hit
instrumentation directly. Secondary strikes induce voltage in power lines or wires connected to
instrumentation. While elaborate, expensive, and nearly infallible lightning protection systems
are on the market, Campbell Scientific, for many years, has employed a simple and inexpensive
design that protects most systems in most circumstances. The system consists of a lightning rod,
metal mast, heavy-gauge ground wire, and ground rod to direct damaging current away from
the data logger. This system, however, is not infallible. The following image displays a typical
application of the system:
20. Installation 159