Troxler RoadReader Plus 3450 - Page 20

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. THEORY OF OPERATION