Appendix B Calibration (DiRex System)
Revision W HF Series X-ray Generators - Service Manual
B-52 Quantum Medical Imaging, LLC
AEC Optical Density Calibration
1. In the AEC Calibration Menu, press Optical Density button (see Figure
3-26). The AEC Optical Density Calibration screen appears:
Figure B-27. AEC Optical Density Calibration Screen
2. If the selected film/screen combination is the first one to be calibrated
with the system, perform the following steps:
a. Set the ion chamber detector selection to middle detector and ensure
x-ray tube is at correct SID. Ensure the ion chamber has been bal-
anced.
b. Place 5 cm of acrylic in the X-ray beam.
c. Set the "Target Level" to the desired level (e.g., "1.30" as shown in
the figure above). To do so, press the Target Level value button
(located directly below "Target Level" label), use the keypad to input
the desired value, then press Enter.
Do not change the Target Level
setting at any time during this procedure.