InstroTek
92
9. Specifications and Appendices
Specifications:
National and International
Standards
ASTM D6938, D2950, D7013,
D7759, C1040; AASHTO T310
Density Measurement Range
1120 to 2720 Kg/m
3
(70 to 170
lbs./ft
3
)
Moisture Measurement Range
0 to 640 Kg/m
3
(0 to 40 lbs./ft
3
)
Density Source
Cesium 137
Moisture Source
Americium 241: Beryllium
Density Source activity
0.37 GBq, 10 mCi
Moisture source activity
1.85 GBq, 50 mCi
Transport Index (TI)
0.4 mRem
BS Precision at 2000 Kg/m
3
7.8 kg/m
3
(0.49 lbs./ft
3
)
Direct Transmission Precision at
2000 Kg/m
3
3.5 kg/m
3
(0.22 lbs./ft
3
)
Moisture Precision at 240
Kg/m
3
4.42 kg/m
3
(0.28 lbs./ft
3
)
Composition Error BS
16 kg/m
3
(1.0 lbs./ft
3
)
Composition Error Direct
Transmission
13 kg/m
3
(0.8 lbs./ft
3
)
Surface Error
BS
48 kg/m
3
3.0 lbs./ft
3
)
Surface Error 150 mm (6")
depth
16 kg/m
3
(1 lbs./ft
3
)
Backlight Display and Keypad
Yes
Internal Temperature
Monitoring
Yes
Shielding Materials
Lead, Tungsten, and
Cadmium
Top Shell
UV stabilized plastic
Batteries
6 NiMH AA rechargeable and
one 9v Alkaline backup
battery
Base and tower
Aluminum
Source Rod
Stainless Steel
Guide Tube
Aluminum
Operating Temperature
