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3401-B
Troxler 3401-B User Manual
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Appe
ndix C
-6
Neutron Thermalization and Absor
ption Data
Element
Collisions to
Thermaliza
tion
Absorption Cross
Section
Hydrogen
19.0
0.33
Boron
109.2
750.
00
Carbon
120.6
0.00
34
Nitrogen
139.5
1.90
Oxygen
158.5
0.00
02
Sodium
224.9
0.53
Magnesium
237.4
0.063
Aluminum
262.8
0.23
Silicon
273.3
0.16
Phosphorous
300.8
0.19
Sulfur
311.1
0.51
Chlorine
343.3
33.00
Potassium
378.0
2.10
Calcium
387.3
0.43
Titanium
461.6
6.10
Manganese
528.5
13.30
Iron
537.2
2.53
Cadmium
1474.
6
2390.
00
Lead
1975.
5
0.17
Uranium
2268.
6
4.20
Table 4. Neutron Th
ermaliza
tion and Absorption Da
ta
93
95
Table of Contents
Chapter 1: Introduction
5
Table of Contents
8
Figure 1. Gauge and Accessories
15
Licensing and Regulations
16
Chapter 2 : Parts and Accessories
18
Unpacking and Inspection
18
Figure 2. 3411-B Front Panel Controls
20
Figure 3. 3401-B Front Panel Controls
22
Chapter 3 : 3411 Operating Procedures
24
Taking Standard Counts
24
Taking Soil Measurements
26
Taking Asphalt Measurements
28
Chapter 4 : 3401 Operating Procedures
34
Taking Soil Measurements
34
Taking Asphalt Measurements
36
Chapter 5 : Special Use Procedures
37
Trench Measurements
37
Figure 4. Roller Pattern
44
Thin Lift Overlays
45
Figure 5. Thin Lift Overlay Nomograph (si Units)
46
Figure 6. Thin Lift Overlay Nomograph (US Customary Units)
47
Roof Moisture Measurements
48
Figure 7. Midpoint of Interval
48
Figure 8. Midpoint of Interval
49
Chapter 6 : Gauge Base Electronics
52
Electronic and Detector Service
52
Stability and Drift Tests
53
Figure 9. Statistical Stability Test
56
Gauge Base Electronics
57
Figure 10. 3411-B Display Test Sequence
58
Figure 11. 3411-B Rotary Switch Test Format
59
Appendix A : Maintenance & Troubleshooting
62
Charging Batteries
62
Mechanical Maintenance
63
Troubleshooting
67
Calibration
70
Returning the Gauge for Service
72
Replacement Parts
73
Appendix B : Radiation Theory & Safety
77
Radiation Theory and Safety
77
Working with Radiation Sources
77
Appendix C : Theory of Operation
90
Density
90
Moisture
93
Appendix D : Specifications
97
Measurement Specifications
97
Mechanical Specifications
97
Radiological Specifications
97
Electrical Specifications
97
Appendix E : Standard Count Log
106
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Troxler 3401-B Specifications
General
Brand
Troxler
Model
3401-B
Category
Measuring Instruments
Language
English
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