![background image](http://html1.mh-extra.com/html/cpi/indico-100-series/indico-100-series_service-and-installation-manual_2675023158.webp)
3D
AEC Calibration
CPI Canada Inc.
Page 3D-24
Rev. D Millenia / Indico 100 Series Service Manual Ch # 740904-06
3D.5.0 AEC CALIBRATION (TABLE BUCKY) Cont
Step
Action
5.
Place 1.5 mm of copper (pure grade) in front of the collimator, ensuring that the radiation
is COMPLETELY blocked by the absorber.
6.
Place the generator into the programming mode. Refer to section 3C.1.1.
7.
From the GENERATOR SETUP menu select GEN CONFIGURATION.
8.
From the GEN CONFIGURATION menu select AEC SETUP.
9.
Set up the AEC parameters in the AEC SETUP menu FOR EACH ACTIVE AEC
CHANNEL. Refer to section 3C.5.5 for definitions of the items in the AEC SETUP menu.
10.
Set up the image receptors in the RECEPTOR SETUP menu such that each receptor
has the desired AEC channel assigned to it. Refer to section 3C.5.3 for RECEPTOR
SETUP information.
11.
In the RECEPTOR SETUP menu, set MEMORY to NO for each image receptor. This
will ensure that the next receptor being calibrated will not remember the techniques from
the previous receptor.
The MEMORY function may be reset as desired after AEC calibration is completed.
12.
In the RECEPTOR SETUP menu, ensure that the AEC BACKUP MAS and AEC
BACKUP MS are set sufficiently high that the generator backup timer will not terminate
the exposure.
13.
From the GEN CONFIGURATION menu select AEC CALIBRATION.
14.
From the AEC CALIBRATION menu select FILM SCREEN 1 (the slowest film screen
combination).
CAUTION:
DURING THE FOLLOWING CALIBRATION PROCEDURE, BE SURE THAT THE SELECTED
TECHNIQUES WILL NOT OVERLOAD THE X-RAY TUBE. USE CAUTION WHEN REPEATING
EXPOSURES AS THIS MAY QUICKLY OVERLOAD THE X-RAY TUBE. MOST X-RAY TUBE
MANUFACTURERS RECOMMEND NO MORE THAN TWO HIGH SPEED STARTS PER MINUTE.
NOTE:
BE SURE TO USE THE SAME CASSETTE FOR EACH EXPOSURE AT THAT FILM SPEED.
AEC BOARD
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
Solid State (Fig 3D-8)
R1
R2
R3
R4
Ion
Chamber
(Fig
3D-9)
R1 R2 R3 R4
Universal
(Fig
3D-10)
R1 R26 R27 R28
Universal
(Fig
3D-11)
R1 R2 R3 R4
Table 3D-10: AEC board gain pot designations
AEC BOARD
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
Ion
Chamber
(Fig
3D-9)
R11 R12 R13 R14
Universal
(Fig
3D-11)
R91 R92 R93 R94
Table 3D-11: Short AEC time compensation pot designations