Lunar DPX-IQ, Operator'S Manual, Page: 40 / 166

3-2 Quality Assurance DPX-IQ Operator’s Manual
Figure 3-1. Calibration standard position
4. Select
!
.
5. Select any key and make sure the Power On, X-ray, and Shutter lights are on. If the
lights are on, select
$
to start the QA test.
6. After the test, the program prints the results (figure 3-2). Make sure the printout shows
that all tests pass. Refer to the correct results that follow:
• The detector peak, and the high keV and low keV peaks, are no more than 50
units above or below the previous peak settings.
• Each Functional Measurement has a spillover of less than 9%. A spillover
between 9–10% is marginal, and spillover of more than 10% is failing.
• The Standard Values have CV values of 2.0% or less. Mean values do not change
from the expected value by more than 5%.
If these conditions are not successful, an error message shows on the bottom of
the printout and on the screen.
7. Save the printout.
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