4. Wearing safety glasses (or other locally approved safety
devices), step on the plate and hammer the drill rod at least
50 mm (2 in.) deeper than the desired test depth. (The drill
rod increments include the additional depth.)
NOTE:
It is very important to drill the hole at least 2 inches
(5 cm) deeper than the measurement depth. The
EGauge source rod is approx. 2 inches longer than
the measurement depth, (the rod extends below the
source). If the hole is not deep enough the source
rod cannot be lowered properly into the hole
resulting in erroneous readings.
Figure 5. Drill Rod Positioning
WARNING
Under no circumstances should you use the source
rod of the gauge to drill holes. This could result in
breaking or damaging the source rod or providing
inaccurate readings.
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