3–2
INTRODUCTION
As described on page 4–2, Troxler recommends taking a reference
reading each day that the gauge will be used, and periodically while
taking measurements. The reference reading consists of placing the
gauge on the reference standard contained in the gauge carrying
case and pressing the 〈Ref〉 key. The density read by the gauge is
then compared to the known density of the reference standard. The
result of this comparison is used to automatically adjust gauge
measurements.
For increased accuracy, measurements can be adjusted using density
offset and mix calibration values described in the following
sections.
To determine the density offset, take a gauge reading and compare
the measured value to an alternative density value, as measured by
another method (such as using a nuclear gauge or extraction and
analysis of a road core).
For a given material, the slope and intercept values can also be
determined using the Mix Calibration function (see page 3–6).
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