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a. Check the “Assign ROI as Unknown” box.
b. Select the nuclide for the ROI from the “Associated Nuclide” drop-down list.
c. Select the peak energy for the ROI from the “Associated Peak” drop-down list.
7. Click on the “ROI Eff. Cal!” button.
8. Click on the “Report” button to view, save, or print the efficiency calibration report. This report is available
any timefollowing the efficiency calibration, until replaced by a new efficiency calibration.
Fine Tuning Hardware Settings
Prerequisites
This procedure assumes that an energy calibration has been
performed.
Discussion
The “Fine Tuning” procedure provides an automated way of
adjusting the Fine Gain to compensate for small shifts in the
spectrum due to changes in the temperature, etc., of the detector.
This procedure can also be done manually. In many cases, it is quicker to manually adjust the fine gain setting.
Procedure
Click on the “Fine” button on the button bar. A small window will pop up and display an isotope selection drop-
down menu and an energy peak selection drop-down menu. The hardware settings panel will also open along
the bottom of the spectrum display, but only the “Fine Gain Adjust (±64)” will be active.
1. Select an isotope and an energy peak from the drop-down menus.
2. Click on the “Fine Tune” button. Note: The corresponding isotope source must be under the detector in
order for the fine tuning to be successful.
3. A series of acquisitions will follow until the most accurate fine gain adjustment is achieved. This could take
several minutes.
4. A “Fine Gain Adjustment Complete” message will appear when the procedure is done.
Service
CAUTION: Do not send a contaminated instrument for repair or calibration under any circumstances. There are
no serviceable parts inside the instrument.
If the URSA II requires servicing, please contact your distributor or the manufacturer at the following address:
S.E. International, Inc.
P.O. Box 39, 436 Farm Rd.
Summertown, TN USA 38483-0039
Tel 931-964-3561, Fax 931-964-3564
E-mail: [email protected]
Software License Agreement