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The static protection built into the XC780 requires a good ground point to work
effectively. The ground provided by the AC adapter will work in most cases,
but severe environments may require additional grounding. If unsure if your
application requires additional protection, follow the following instructions,
just to be safe.
The best way to protect the XC780 from excessive static is to provide a SHORT,
THICK GROUND line directly from the XC780 enclosure to earth ground. The best
earth ground point is a copper grounding rod driven directly into the earth
next to the instrument. A support beam or copper pipe which go to earth nearby
will also work. Be sure the connection at both the XC780 and ground are solid,
tight connections to bare metal. Scrape away the paint if you have to.
If an external scale platform is being used, its platter or deck plate may also
be connected to earth ground to stop static charges from traveling up the load
cell lines into the XC780. If the platform is earth grounded, the load cell
shield should be connected at the scale platform end only.
If external devices such as printers and computers are connected, the interface
cable shield should be connected at the external device end only. For
especially bad static areas, EMI filter interface connectors are available for
additional protection.
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