6–
TRENCH OFFSET
To use the Model 3451 in a trench or within 0.6 m (2 ft) of a large
vertical surface, first perform a
trench offset
. When a trench offset is
enabled, the gauge automatically applies a
trench density offset
to
readings of 4 in. or less, and a
trench moisture offset
to all readings.
For direct transmission measurements over 4 inches deep, only the
trench moisture offset is used. In the displays shown in this section,
TMO
refers to
trench moisture offset
;
TDO
refers to
trench density
offset
values (one for each set of detectors).
To access the trench offset function, press the
〈
Trench
〉
button on
the
Offset Menu
shown in Figure 6–1 on page 6–3. The PDA
displays the
Trench Offset Select
screen shown in Figure 6–11.
The current trench offset values are displayed in the box.
To enable the offset, press
〈
Enable
〉
. To disable the offset, press
〈
Disable
〉
. The PDA displays a confirmation message. Press the
〈
ok
〉
button to return to the
Trench Offset Select
screen.
Figure 6–11. Trench Offset Select
Summary of Contents for Enhanced RoadReader Plus 3451
Page 7: ...Model 3451 vii NOTES...
Page 17: ...xvi NOTES...
Page 29: ...1 12 NOTES...
Page 33: ...2 4 Figure 2 1 Effect of Moisture on Depth of Measurement...
Page 85: ...4 22 NOTES...
Page 106: ...Model 3451 6 3 Figure 6 1 Offset Menu 6 OFFSETS CALIBRATION...
Page 114: ...Model 3451 6 11 Figure 6 10 Moisture Offset Erase Prompt 6 OFFSETS CALIBRATION...
Page 131: ...6 NOTES...
Page 141: ...7 10 Figure 7 5 Project Data Spreadsheet...
Page 145: ...7 14 Figure 7 8 Project Setup Display Figure 7 9 Standard Counts Display...
Page 147: ...7 16 Figure 7 10 Project Status Display Figure 7 11 Source Decay Display...
Page 149: ...7 18 Figure 7 12 Stat Test Display Figure 7 13 Drift Test Display...
Page 153: ...7 22 NOTES...
Page 166: ...Model 3451 Appendix A 13 Figure A 3 Cleaning the Sliding and Fixed Blocks...
Page 174: ...Model 3451 Appendix A 21 NOTES...
Page 175: ......
Page 183: ...Appendix B 8 NOTES...
Page 221: ...Appendix D 6 NOTES...
Page 223: ...Appendix E 2 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 225: ...Appendix E 4 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 227: ...Appendix E 6 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 229: ...Appendix E 8 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Page 235: ...Appendix G 4 NOTES...
