Adjusting The Aec Board - GE Alpha RT 32551 Installation Instructions Manual

5 Setups, alignments and adjustments
CAUTION!
The AEC is adjusted for one filter and one cassette holder, normally for the
molybdenum filter and with the bucky. The right optical densities for the
rest of the cassette holders with molybdenum filter and for all cassette
holders with rhodium filter are done later as described on Density
programming.
5.2.15

Adjusting the AEC board

1 Go to the service program #64 AEC and check that the AEC Gain
parameter 'g' is set to 1.00.
2 Go back to service mode and make an exposure with semiautomatic
(A) mode 28kV Molybdenum filter @40 mmAcr. Use a compression
paddle and a Bucky with a loaded cassette in it. Detector must be in
center position C1. Also, remember to place the white plastic cover
before exposure.
Fig 5.13. Placement of the acrylics (and phantoms!) onto the cassette holder
3 Press Autorel after the exposure and record the three values
displayed in the mAs window one after one. Each value is displayed
for 1 second. The first value represents the integration time (in ms),
the second is AEC frequency (for example 320=32kHz) and the last
value is base frequency (for example 004=40Hz).
82 GE Healthcare 32551-IMG rev 6