Appendix D Calibration (Using Generator Service Tools)
HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC D-49
8. Repeat above steps with UPPER RIGHT ion chamber detector selected
and UPPER LEFT and UPPER CENTER detectors covered with lead. The
measured mAs reading should be within 5% of the mAs reading noted in
the previous step. If not, adjust the UPPER RIGHT detector gain potenti-
ometer, re-take exposure and verify it is within tolerance. Repeat as nec-
essary.
9. Access the Generator Settings Screen and reset Backup MAS to original
setting noted previously.
Note: If the system is equipped with
"universal" type AEC (i.e., AEC Board
A11 is part number AY40-027S), and
the ion chamber is "level" type (i.e.,
Siemens), adjust the appropriate detec-
tor gain potentiometer on AY40-027S in
accordance with the table below:
Table D-4. Universal AEC Board A11 Detector Gain
Adjustment Potentiometers (Siemens Ion Chamber Only)
ION CHAMBER DETECTOR
AEC BOARD A11
(AY40-027S)
POTENTIOMETER
TABLE 1 R61
TABLE 2 R63
TABLE 3 R66
WALL#1 1 R54
WALL#1 2 R55
WALL#1 3 R56
WALL#2 1 R53
WALL#2 2 R58
WALL#2 3 R57
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