AGFA DX-D 400 User Manual page 114

DX-D 400
User Manual
5.2.1 RAPID TERMINATION
104
FILM / SCREEN COMBINATION: Each of these buttons allows adjustment of
the mAs in relation to a programmed Film / Screen combination that may be in
use slow, medium, or fast respectively (200, 400, 800). Each time a Film /
Screen button is selected (highlighted), the others are automatically
deselected.
DENSITY: These buttons are used to adjust the radiographic image density.
The selected value is shown on the Density Display. Normal image density is
N (default value).
Image density can be increased or decreased in several steps. The variation
percentage density between steps can be changed during the equipment
calibration by the engineer according to customer preferences (the percentage
by default is 25%).
AEC RESET: If the exposure is aborted by the AEC back-up timer, the "AEC
Reset" button blinks accompanied by an audible alarm and the message "Not
Enough Dose" is shown on the Console. Next exposure is inhibited until the
AEC function is reset by touching the "AEC Reset" button. When the Generator
is in "Prep" mode, the AEC function can not be reset.
Before the exposure, if the message "Wrong AEC Selection" is shown on the
Console, it means that the selected kVp value, AEC Density and/or Film/Screen
Combination set a technique that is out of the operative range with AEC and the
next exposure will be inhibited. Change any parameter (kVp value, AEC Density
or Film / Screen Combination) in order to obtain a technique enabled for AEC.
This safety device terminates the X-ray exposure when no radiation is detected
in the Ion Chamber or the selected parameters (short backup time/mAs) are not
appropriate for an exposure with AEC.
AEC Rapid Termination compares the AEC ramp with a 25% of the final value
at the 30% of the Backup Time. It is activated after 30% of the exposure backup
time and after 10 ms of exposure, both conditions have to be fulfilled.
Whenever the AEC is ON it is recommended to select an exposure back-up time
higher than 100 ms for improved operation of Rapid Termination.
The Error Code related to the Rapid Termination is E95.
0232F EN 20191213