Verification Measurements and Data Evaluation
Reports may be generated using the optional VeriFier Software.
Complete a single four (4) minute reading at the desired depth(s) under
evaluation, and record the Wet Density (WD) Density Count (DC) Moisture
(M) Moisture Count (MC) on the ValiDator Evaluation Form (Introduction
page 10). Note: For better precision at Depth 0 (BS) and 12, it is
recommended that you take (2)-four minute counts and record the average
on the form.
Use the ValiDator Density Table to evaluate the Wet Density and Moisture of
the depth being tested for the pass/fail range. If the Wet Density and
Moisture fall within this range the gauge passes the verification process.
Note: All gauge moisture measurements are performed from the
backscatter position. The ValiDator moisture value is determined using the BS
measurement stop.
If a failure is indicated, repeat the testing process reviewing the precautions
listed on page 7.
Failing a second time would indicate an inaccuracy in the gauge calibration
and the need for calibration.
Before moving on to Calibration, complete a statistical analysis using
manufacturer recommendations or ASTM Standard Test Methods detailed in
6938 and D2950 sections on standardization and reference checks. Record
this information on the ValiDator Evaluation Form page 10. (The Analysis is
commonly referred to as a Statistical Stability Test or Stat Test. If this test
passes you may use the Density and Moisture Average for your Calibration
Standard Count.) Before calibration, make certain the gauge meets gauge
manufacturers requirement for routine maintenance and care.
Utilize VeriFier Software (if available), to perform a new calibration.
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