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Suggested Lightning Protection Options:
•
If the instrument is connected to a terminal box or multiplexer, components such as plasma
surge arrestors (spark gaps) may be installed in the terminal box/multiplexer to provide a
measure of transient protection. Terminal boxes and multiplexers available from Geokon provide
locations for the installation of these components.
•
Lighting arrestor boards and enclosures are also available from Geokon. These units install
where the instrument cable exits the structure being monitored. The enclosure has a removable
top to allow the customer to service the components or replace the board in the event that the unit
is damaged by a lightning strike. A connection is made between the enclosure and earth ground
to facilitate the passing of transients away from the displacement transducer. See Figure 8.
•
Plasma surge arrestors can be epoxied into the instrument cable, close to the transducer. A
ground strap then connects the surge arrestor to an earth ground, such as a grounding stake or the
rebar itself.
Consult the factory for additional information on available lightning protection.
Figure 8 - Lightning Protection Scheme
