Quick Start Instructions
The quick start instructions will benefit the new and the experienced operators
using the ValiDation System. The System Operation portion of this manual
contains detailed information about all aspects of the ValiDator system. The
Validation system is designed for use with various nuclear gauges manufactured
by CPN, Humboldt, InstroTek, and Troxler.
Important: Observe manufacturers recommendations regarding safety
precautions when operating density gauges. Stand opposite the source rod at
a distance of three feet or 1 meter when measurements are being taken. Follow
the requirements of your nuclear materials license.
Standard Counts for Daily or Rapid Verification: If you are evaluating your
gauges frequently for Quality Assurance, or will not be calibrating on-site, a daily
4 minute standard count may be used for the Standard counts on the
Evaluation Form for Verification. Take one 4-minute count at all other depths.
Standard count should be taken on a solid surface such as soil, asphalt or
concrete base. Do not take standard counts with the standard block on the
ValiDator, second floor, or the tailgate of a truck.
Standard Counts for Combination Verification and Calibration: If you will be
performing a scheduled Verification or Calibration and would like to optimize
the data collection process, perform an Extended Standard Count. (CPN: 20
minute count recording the Wet Count and H2O Count. Humboldt and Troxler:
Perform a Stat Test and record the average Density and Moisture count.) Record
the Standard Counts on the Evaluation form. Two 4-minute counts should be
averaged for Backscatter (BS) and Depth 12 measurements, due to the
relatively lower precision at these positions.
I. Verification Process
A. Align gauge on the ValiDator. For lowering the Source rod, slide the
gauge back until the rod is over the access hole. (See Gauge
Placement page 8)
B. Set count time for four (4) minutes. Note: All moisture verification is
done at the Backscatter position.
C. Backscatter measurements should be taken with the gauge aligned
with the surface stops; two four-min. counts should be averaged for
better precision.
D. Direct Transmission measurements require that the gauge
placement be adjusted to minimize the void between the source
rod and the inside of the ValiDator. After lowering the source rod
move it towards the control panel end of the gauge and to the left
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