Troxler EGauge 4590, Manual Of Operation And Instruction

Page: 48 / 186

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Preparation of the test site surface is critical to gauge
performance. This section provides site preparation procedures
for soil and base course sites. To ensure the most accurate gauge
readings, the appropriate preparation procedure should be
followed.
Soil and Base Course Preparation
1
1
.
. Locate a level site free from any large holes, cracks, or debris
(soil surface conditions are critical to accurate
measurements).
2
2
.
. Smooth the surface by moving the scraper plate in a back
and forth motion. Filler such as fine sand may be used to fill
in the surface voids.
3
3
.
. For direct transmission measurements, put the drill rod
through the extraction tool and then through one of the
guides on the plate (see Figure 5).
4
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.)
CAUTION
Use only enough filler to fill the voids. Too much filler
will cause an error in the measurement.
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.