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 1.48 GBq 10% (40 ± 10% mCi)
Am-241:Be
Source housing Stainless steel, encapsulation
Shielding Tungsten, lead, and cadmium
Surface dose rates See 3440 Radiation Profile on
page C–4
Source rod material Stainless steel
Shipping case DOT 7A, Type A, Yellow II label,
TI = 0.6
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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