783620H / 1013 5. MENU COMMANDS
If the energy calibration process detects a severe error, an error message is displayed. Click OK to acknowledge the error. The calibration process will stop at this point.
If the energy calibration process detects a minor error, a warning message is shown. Click OK to acknowledge the warning and remember that this warning was given. The calibration process will continue as normal. When the final review screen is displayed (Fig. 126), click Edit Energy to review the cause of the error and correct it if needed (see Section 5.3.8.5).
5.3.8.4. Performing the New Efficiency or Efficiency-plus-TCC Calibration
If you chose to create a new efficiency or efficiency-plus-
TCC calibration, the wizard asks for the next source to be positioned (see Fig. 125). Click
OK to begin spectrum acquisition. If the buffer is selected, the current spectrum in the buffer is used.
Fig. 125. Position the Source for the Efficiency or Efficiencyplus-TCC Calibration.
If the efficiency calibration process detects a severe error, an error message is displayed. Click OK to acknowledge the error. The calibration process will stop at this point.
5.3.8.5. Reviewing the Calibration Wizard Results
The final screen in the calibration wizard is the review screen shown in Fig. 126. This shows the plots of the results of all the calibration steps. The TCC functions are not plotted, but indicated as
Tcc Calibrated
or
Uncalibrated
.
When the TCC calibration is performed, it includes recalculating the efficiency function, therefore, the efficiency curve (upper right) might not appear to be a good fit to the experimental points. This is because the total efficiency function is the combination of all the different functions.
To review or change the energy or FWHM calibration, click Edit Energy. This opens the complete energy calibration dialog as explained in Section 5.3.2, page 105. If any changes are made, the efficiency (and TCC) calibration should be repeated. If you did not select TCC, the efficiency calibration can be redone by clicking on Edit Efficiency. This will open up the complete efficiency calibration dialog as explained in Section 5.3.3, page 114. This does not
redo the TCC calibration.
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Fig. 126. Review the Calibration Results.
Alternatively, you can change a calibration by clicking on Back to return to previous wizard screens. Click Back to return to the efficiency dialog, then Back again to return to the energy dialog.
NOTE
If the spectrum currently in the MCB is the right spectrum, be sure to unmark the Clear
Data Before Start checkbox.
Once you have reset the starting parameters as needed, the process will continue on as before with the spectrum collection or file recall.
The calibration is now stored with the MCB or buffer, but not on disk. Use the Save Calibration button to save the calibration to a file. This should always be done to preserve the calibration for later use.
To complete the calibration wizard and close the dialog, click Finish. (Cancel operates the same as Finish.)
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