Create a Special Calibration
To create a special calibration, the operator must take readings with
the gauge and enter the true density. The Model 3450 can store one
partial calibration. A partial calibration allows the operator to enter
the true density or take readings at different times.
To create a special calibration, press 〈4〉 at the Special Calibration
menu (see page 6–11).
If a partial calibration was saved earlier, the gauge will display a P
beside the option entered before (see page 6–15)
. To take readings
for the special calibration, press
〈1〉 and see Measuring the Density
below. To enter the true density, press
〈2〉 and see Entering True
Density on page
6–14.
MEASURING THE DENSITY. Press 〈1〉 to select Measure
Density. Prepare the test site as described on page
4–6. Place the
gauge on the test site and position the source rod in the desired
measurement position.
NOTE
When using destructive methods (such as drilling cores
or sample removal) for true density measurement, take
gauge readings before removing samples. Position the
gauge over the designated test site as in Figure 6–1.
Figure 6–1. Gauge Positioned Over Designated Test Site
1-Measure Density
2-Input True Density
6. OFFSETS & CALIBRATIONS
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