AGFA DX-D 300, User Manual, Page: 88 / 104

DX-D 300 U-Arm
User Manual
80
0171F EN 20181009
7. Select “ Center ” Ion Chamber and Density “ Normal -- 0 ”.
Make a RAD exposure and note the exposure mAs and time. For a
proper functioning of the AEC, the exposure must not be aborted by the
AEC back-up timer.
8. Deselect “ Center ” and select “ Left ” Ion Chamber.
Make a RAD exposure and note the exposure mAs and time. For a
proper functioning of the AEC, the exposure must not be aborted by the
AEC back-up timer.
9. Deselect “ Left ” and select “ Right ” Ion Chamber.
Make a RAD exposure and note the exposure mAs and time. For a
proper functioning of the AEC, the exposure must not be aborted by the
AEC back-up timer.
10. The noted Exposure mAs and time have to be equal
¦
10% between
all three Ion Chambers. If not, contact Service.
11. Repeat the above steps changing the Density and/or the homogeneous
phantom (e.g. a bucket with 5 cm of water).
Compare the Exposure mAs and time between each Ion Chamber and
between the values noted before (for a lower density or less water, lower
mAs and a shorter time; for half of density or half of water, half of mAs
/ time). If not, contact Service.
12. Finally, check the proper functioning of the AEC back-up timer by making
a RAD exposure with the selections indicated in step 6., but with the
Collimator blades fully closed.
The exposure must be finished by the AEC back-up timer, that is, the
exposure length is 1.0 second. If not, contact Service.