Humboldt H-4114SD.3F Electrical Density Gauge - Manual (Page 19)

16. To begin, place the gauge on the ground near you and open the case.
a. Turn the gauge on, and remove the gray, circular Dart Template
from the lid of the case.
b. Place the gray, circular template on the ground. Remove the
accessory caddy from the EDG case and place it on the ground, out
of the way. Remove the Hammer and the four Darts from the bottom
of the case. Position the Darts at the detents on the gray template
and pound them into the ground with the Hammer. The shoulder of
the Darts should be level and in contact with the ground surface.
Darts should be driven perpendicular into the ground, not more
than 20° from perpendicular. If rocks are encountered during the
process of driving the Darts, which prevent the driving of a particular
Dart, move your test site slightly to accommodate the rock.
c. Unscrew the cap to the sensor port, located on the front base of the
EDG case, to the right of the handle. Remove the Sensor Unit from
the Accessory Caddy and attach the black cord attached to the
Sensor Unit to the sensor port. Then, attach the Sensor Unit, pins up,
to the center of the gray, Dart Template, using the velcro fastening
system attached to each item.
d. Remove the 2 Cables, which are used to make a connection
between the Darts and the Sensor Unit. These cables have an
alligator clamp on one end and a 1/4" phone plug on the other.
Attach the two cables to the Sensor Unit using the 1/4" phone plug
ends of the cables. Then, take the alligator clamp end of each cable
and attach each one to a single opposing positioned Dart. When
attaching cables between the Darts and the Sensor Unit, it is best to
have as straight a run as possible. The Cables should not cross.
Care should be taken not to cross the Cables when asked to switch
them from the A-A position to the B-B position during the testing
process.
e. Remove the Thermistor (Temperature Sensor), located in its plastic
case, in the accessory caddy. Plug the Thermistor (Temperature
Sensor) into the mini-phone plug port located on the side of the
Sensor Unit directly above where the Black cable enters. Remove
the T-handle Probe from the bottom tray of the EDG case and
use it to create a hole away from the Dart Template, into which you
will place the Thermistor (Temperature Sensor). The placement of
the Temperature Sensor is not critical and only needs to be placed
beneath the surface of the material.
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