GeotechOS
Equipment and quality

Nuclear gauges

Record the daily standard counts of a nuclear moisture-density gauge in GeotechOS Lab (AS 1289.5.8.1), judged against the gauge's earlier counts.

Applies toWindows and macOSWeb browserPhone and tablet

Before you use a nuclear gauge, take its standard counts. Lab judges them against the average of the earlier counts (AS 1289.5.8.1, Appendix A). A gauge whose counts are out of the limits cannot be used for field density tests.

Set up the standard count check

  1. Open Equipment and checks and click the gauge, for example Nuclear gauge 1.
  2. Under Set up a check, click Nuclear gauge standard counts.
  3. Type the Prescale factor from the gauge's manufacturer.
  4. Click Set up the check.

You can also set up the radiation monitoring check and the density system consistency check.

Take the standard counts

  1. Count for at least 4 minutes, at the same place as before, at least 1 m from anything that could affect the count.
  2. Open the gauge and click Nuclear gauge standard counts.
  3. Type the Density standard count and the Moisture standard count.
  4. Under Result, Lab compares them with the last four counts in five weeks. While a new gauge has fewer than four, Lab shows Establishing.
  5. Click Record the check.

The standard counts of Nuclear gauge 1, establishing with 0 of 4 earlier counts, which conform

On site, you also type the standard counts on the nuclear sheet or the asphalt lot. See Site lots.