Model 3450
6–11
SPECIAL CALIBRATION
The
Special Calibration
features allow the operator to recalibrate
Model 3450 soil and thin layer readings. Special calibrations are
specific for the test material and measurement depth. The gauge can
store four density special calibrations and four thin-layer special
calibrations.
NOTE
When turned off, the gauge disables all special
calibrations and offsets.
Before performing a special calibration:
1.
Prepare the sample area for testing as described in Chapter 4.
2.
Take gauge measurements on each area.
3.
Take a density measurement using an alternate method.
DENSITY SPECIAL CALIBRATION
The factory calibration provides accurate results for the majority of
materials encountered in the field. However, there are situations
when varying material compositions and/or texture could affect the
gauge accuracy.
The
Special Calibration
function allows the operator to recalibrate
the Model 3450 gauge for material characteristics not covered by
the factory calibration. The true density is typically determined by
measuring samples of a known material in a laboratory.
The
Special Calibration
function is activated only in
Soil
mode.
To access the
Special Calibration
function, press the
〈
SPECIAL
〉
key. At the
Special
functions menu, press
〈
1
〉
to access the
Special
Operation
menu. Press
〈
1
〉
, the gauge displays the
Special
Calibration
menu:
SP. CAL:Stored Cal
1-Enable Spec Cal
2-Disable
4-New
3-View
5-Erase
6
. O
FF
SE
TS
&
C
AL
IB
RA
TIO
NS
Summary of Contents for RoadReader Plus 3450
Page 7: ...Model 3450 vii NOTES...
Page 13: ...xii NOTES...
Page 17: ...1 4 GAUGE PARTS AND ACCESSORIES Figure 1 1 Model 3450 Parts and Accessories...
Page 23: ...2 4 Figure 2 1 Effect of Moisture on Depth of Measurement...
Page 53: ...3 28 NOTES...
Page 169: ...Appendix E 2 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 171: ...Appendix E 4 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 173: ...Appendix E 6 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 175: ...Appendix E 8 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 181: ...Appendix G 4 NOTES...
Page 187: ...Appendix H 6 NOTES...
Page 199: ...Index 12 NOTES...
