Page
30
of
248
5.3
Earth Ground Point
A connection point has been provided for an Earth ground. Always connect the earth ground to a suitable
ground at the site as described below.
Any time a sensor cable is attached to the terminal strip, the unit may be exposed to electrical surges such
as those that come from nearby lightning strikes. The unit includes spark gaps and other protection
devices that shunt the energy to the earth ground. If there is no connection to the earth ground point, the
energy has nowhere to go, and the unit can be damaged.
Failure to properly connect the Earth ground point will lead to failures in the field due to surges.
To install a proper ground connection point:
Use a copper ground rod driven into the ground at least 6 feet.
Attach a very heavy gauge (#4 Solid Copper) wire between the rod and the Earth ground point on
the unit. The connection point can accept up to a 4-gauge solid copper wire. If a heavier gauge
copper wire is used to connect to the ground rod, a reducer may be necessary to connect to the
terminal on the unit.
Firmly secure the screw on the ground point firmly on the copper wire. Do not rely on AC power ground
connections as they are not always properly grounded and may introduce other surges.
Gas tube protection exists on the following inputs, based on the model:
XLINK 500
SDI-12
RS-485
DIN1 and DIN2
DOUT
VREF
Analog A
Analog B
Analog Diff C
Analog Diff D
4-20mA
XLINK 100
Summary of Contents for SUTRON XLINK 100
Page 230: ...Page 230 of 248...
Page 247: ...Page 247 of 248...
