783620H / 1013 8. QUALITY ASSURANCE
8.2.2. Measure Background
This command opens the dialog in Fig. 282, to verify that all sources have been removed from the Detector before proceeding. Confirm that all sources have been removed for a background measurement, click OK–Start. The remaining functions are performed automatically.
Fig. 282. Begin Background QA Count.
Mark the Overwrite (repeat) previous
background measurement checkbox (by clicking on it) if the previous measurement was in error. If a sample QA has been run since the background QA, the previous background run cannot be overwritten. For example, if a problem was detected, fixed, and this run is to verify the repairs, check the box so the “bad” value is not kept in the database. Click OK.
If the background is outside the set limits, a warning similar to Fig. 283 is displayed.
8.2.3. Measure Sample
This command opens the Sample QA Measurement dialog (Fig. 284). It is a reminder to place the QA source on the Detector. Click Overwrite to replace the last measurement. Click OK–Start to begin the count.
The QA source spectra are collected for the preset time and analyzed automatically.
The analysis results are compared with the limits. If the result is outside the limits, a warning is displayed. The results are also stored in the QA database.
Fig. 283. Background Warning Message.
Fig. 284. Starting Sample Type QA
Measurement.
365
