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Purpose
A nuclear density gauge must be entered in the system by your MetaField Administrator for it to be available for a Density Test. A new gauge requires 5 standardization counts to be entered.
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Gauges are required to be calibrated / verified by ASTM standard annually, or whenever the gauge is determined to need repair. We recommend that when these events occur, the field technician run the MetaField standardization 5 times using the resulting counts to reset the gauge to the calibrated / verified count. Ongoing daily standardization then uses the calibrated / verified count as the new benchmark. |
How to Standardize a Nuclear Gauge
To standardize a nuclear gauge, select the Gauge Standardization button from the MetaField Field menu. The following menu will appear. Select the name of the gauge you wish to standardize and click the Standardize Gauge button.
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Depending on the gauge selected, MetaField will automatically adjust according to the Method the gauge was calibrated (Standard Count or Radioactive Decay) |
Standard Count
The following will appear after you select a gauge that has been calibrated via Standard Count method.
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| The Standardization Date will default to "today's" date. It can be back dated as long as the date you select is >= the last standardization date. You can't back date a gauge standardization to a date prior to a previous standardization date. It's important that the standardization date is accurate, as the density test will only present gauges to the user where the Test Date = Gauge Standardization Date. |
Standard Count (Troxler 3450 Gauges)
The following screen will appear if a gauge is calibrated to record 2 density readings. This is mainly used to support Troxler 3450 gauges.
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“Accurate” does not mean the result is “True.” It means that the field technician has validated that the counts entered are correct. There are times when the gauge standardization may fail, but the gauge does not need maintenance. You should follow your company’s procedure for dealing with these exception situations. |
Radioactive Decay
The following screen will appear after you select a gauge that has been calibrated via Radioactive Decay method.
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Post-Save Options
Once your counts are saved, Gauge Standardization is complete. At this point, you will be given 3 options:
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