HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC A-11
Appendix A AEC Calibration with DR or CR Film Plate
23. Repeat the previous steps for the 60, 80, 100, 110, 120, and, if 150
kV system, 130 and 140 kV calibration points, placing the specified
thickness of acrylic in the x-ray beam as indicated on the AEC KV Cal-
ibration screen for each kV calibration point, and taking one exposure
per kVp calibration point.
24. Upon completion of the final kV calibration point (i.e., 120 kV on 125
kV systems, 140 kV on 150 kV systems), press the key next to the
Measure OD field. The field will now display Save Calibrate. Press
this key once again to save the calibration data for the final kV cali-
bration point
.
IMPORTANT! Unless the "Save Calibrate" key is
pressed, the calibration data will not be saved.
25. Repeat AEC KVP Calibration procedure (steps 17 through 23) until all
the measured sensitivity values are within required range.
26. Press the key next to the Next Calibrate field to return to the AEC
Calibration menu.
27. This completes AEC calibration for this particular film/screen combi-
nation. Repeat AEC calibration procedures for all additional film/
screen combinations that will be used with the system.
28. Verify AEC calibration by taking several exposures in AEC mode and
checking the resulting "REX" or "S" value. If necessary, repeat AEC
calibration procedure to further adjust AEC accuracy.
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