4–2
TAKING A STANDARD COUNT
To adjust readings for source decay (see
) and natural
background radiation, take a daily
standard count
. A four-minute
daily standard count helps ensure the highest measurement
accuracy.
Locate the reference standard block shipped with the gauge. Always
take standard counts using the reference standard block.
Choose a standard count site. The standard count site should be:
♦
Dry and flat
♦
At least 3 meters (10 ft) from any large vertical surface
♦
At least 10 meters (33 ft) from any other radioactive source
♦
On asphalt, concrete, or compacted soil at least 10 centimeters
(4 in.) thick
Turn the gauge and PDA on as described on page 3–8. At the
RoadReader Plus main menu (see Figure 3–11 on page 3–18), press
the
〈
Standard Count
〉
button. The PDA displays the
Standard
Menu
(see Figure 4–1), which shows the last standard counts for
moisture (
MS
) and density (
DS1
and
DS2
).
Figure 4–1. Standard Menu
Содержание Enhanced RoadReader Plus 3451
Страница 7: ...Model 3451 vii NOTES...
Страница 17: ...xvi NOTES...
Страница 29: ...1 12 NOTES...
Страница 33: ...2 4 Figure 2 1 Effect of Moisture on Depth of Measurement...
Страница 85: ...4 22 NOTES...
Страница 106: ...Model 3451 6 3 Figure 6 1 Offset Menu 6 OFFSETS CALIBRATION...
Страница 114: ...Model 3451 6 11 Figure 6 10 Moisture Offset Erase Prompt 6 OFFSETS CALIBRATION...
Страница 127: ...6 Figure 6 25 Enter File Name Figure 6 23 Input True Density Figure 6 24 Thin Layer Special Calibration Results...
Страница 131: ...6 NOTES...
Страница 141: ...7 10 Figure 7 5 Project Data Spreadsheet...
Страница 145: ...7 14 Figure 7 8 Project Setup Display Figure 7 9 Standard Counts Display...
Страница 147: ...7 16 Figure 7 10 Project Status Display Figure 7 11 Source Decay Display...
Страница 149: ...7 18 Figure 7 12 Stat Test Display Figure 7 13 Drift Test Display...
Страница 153: ...7 22 NOTES...
Страница 166: ...Model 3451 Appendix A 13 Figure A 3 Cleaning the Sliding and Fixed Blocks...
Страница 174: ...Model 3451 Appendix A 21 NOTES...
Страница 175: ......
Страница 183: ...Appendix B 8 NOTES...
Страница 187: ...Figure C 5 Review Stat Test Appendix C 4 Figure C 3 View Stat Counts Figure C 4 Stat Test Results...
Страница 221: ...Appendix D 6 NOTES...
Страница 223: ...Appendix E 2 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Страница 225: ...Appendix E 4 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Страница 227: ...Appendix E 6 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Страница 229: ...Appendix E 8 STANDARD COUNT LOG Gauge Serial Number Date Moisture MS Density DS1 Density DS2...
Страница 235: ...Appendix G 4 NOTES...
Страница 246: ...Model 3451 Warranty 1 NOTES WARRANTY...
