Appendix B Calibration (DiRex System)
Revision W HF Series X-ray Generators - Service Manual
B-38 Quantum Medical Imaging, LLC
Figure B-24. MA Calibration Screen
2. Verify 75s mA appears in the MA Calibration Screen and "Next Measure"
appears on the top right button as shown in Figure B-24.
3. Take an exposure at the setting indicated in the MA Calibration Screen
(i.e., 60 kVp, 75s mA, 100 mS).
4. On the Dynalyzer Digital Display or mAs meter, observe the measured mA
value. (Ideally, this value should be 75 or 7.5 mAs.)
5. If not 75 mA, press the 75 mA adjustment button (located directly below
"Measured MA#1" label). Find the measured mA value in the scrollable
list, select it then press Enter. The values appearing in the list are in one-
tenth increments. Repeat mA calibration for 75s until indicated and mea-
sured mA values agree to within 5%+1 mA.
6. Press Next Measure button to proceed to 400L mA calibration setting.
7. Verify 400L mA appears in the MA Calibration Screen and "Save Calibra-
tion" now appears on the top right button.
MA INCREASE/
DECREASE
BUTTONS
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