AGFA DX-D 400 User Manual page 113

5.2 AUTOMATIC EXPOSURE CONTROL (AEC)
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Note
0232F EN 20191213
Automatic Exposure Control (AEC) produces consistent image density with
excellent contrast regardless of the radiographic technique selected. The AEC
module comprises the controls for the selection of the Exposure Detector Fields
(Ion Chamber), the Film/Screen Combination, Image Density Compensation
and AEC Reset.
The AEC mode is activated by touching any of the three AEC Field buttons. The
AEC mode is deactivated by touching all the selected AEC Field buttons until
none of them is selected.
In AEC mode the back-up time (or back-up mAs) MUST BE SET MANUALLY
by the operator using the Console controls.
The value of the back-up time (or mAs) must be set at a greater
value than the previously considered for the exposure time (or
mAs). A value above 50% of the considered value is the
recommended. Very extreme values of back-up time (or mAs)
should be avoided to prevent patient from excessive exposure
when a control error is produced.
FIELD SELECTION: Each button indicates its related physical location of the
selected field in the AEC Exposure Detector, and it may be selected or
deselected by touching it. Any combination of fields can be selected and the
color of buttons change (highlighted) when active.
DX-D 400
User Manual
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