Model 3450
2–1
CHAPTER 2
THEORY OF OPERATION
This chapter provides a brief description of the theory of operation
of the Troxler Model 3450 RoadReader Plus. The
direct
transmission
and
backscatter
modes of operation are illustrated,
along with an explanation of the cesium-137 source,
americium-241:beryllium source, and detector geometry.
CONTENTS
Density .......................................................................................... 2–2
Moisture ........................................................................................ 2–3
Thin Layer .................................................................................... 2–5
Calibration .................................................................................... 2–6
Offsets .................................................................................... 2–6
2. T
HEO
RY
OF
OP
ER
AT
ION
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...
