Model 3440-L G–3
G. 3440 SPECIFICATIONS
CALIBRATION SPECIFICATIONS
Uncertainty of density standards: ±0.2%
Uncertainty of moisture standards: ±2.0%
Calibration standards range
Density: 109 – 165 pcf (1750 – 2640 kg/m
3
)
Moisture: 0 – 40 pcf (0 – 640 kg/m
3
)
Gauge operational range
Density: 70 – 170 pcf (1100 – 2700kg/m
3
)
Moisture: 0 – 40 pcf (0 – 640 kg/m
3
)
Method: Computer reduction of count rate data based on U.S. National
Bureau of Standards Electron Cross Sections, Neutron Cross Sections,
and Absorption Coefficients. Data is reduced to the form D =
(1/B)1n(A/(CR + C)) for density and M = (CR – E)/F for moisture
where A, B, C, E, and F are constants and CR is count ratio. The
algorithm corrects for hydrogen photon-scattering coefficients and
provides means for offsetting non-water hydrogen. Direct calibration
entry by keypad.
RADIOLOGICAL SPECIFICATIONS
Gamma source 0.3 ± 10% GBq (8 ± 10% mCi) Cs-137
Neutron source 0.56 GBq 10% (15 ± 10% mCi)
Am-241:Be
Source housing Stainless steel, encapsulation
Shielding Tungsten, lead, and cadmium
Surface dose rates See 3440-L Radiation Profile on
page C–4
Source rod material Stainless steel
Shipping case DOT 7A, Type A, Yellow II label,
TI = 0.4
Certificates of Competent Cs-137 – USA/0614/S or USA/0356/S
Authority Am-241:Be – USA/0632/S or CZ/1009/S
Registry of Radioactive Sealed NC-646-D-130-S
Sources and Devices
MEMORY SPECIFICATIONS
RAM 64K Resident, Non-volatile
Stores over 450 complete station records
192K External
ROM 256K or 512K Resident, 512K External
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