CPI Indico 100 Series Service And Installation Manual page 158

3D
AEC Calibration
3D.5.0 AEC CALIBRATION (TABLE BUCKY) Cont
Step
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
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
Solid State (Fig 3D-8)
Ion Chamber (Fig 3D-9)
Universal (Fig 3D-10)
Universal (Fig 3D-11)
AEC BOARD
Ion Chamber (Fig 3D-9)
Universal (Fig 3D-11)
Page 3D-24
Place 1.5 mm of copper (pure grade) in front of the collimator, ensuring that the radiation
is COMPLETELY blocked by the absorber.
Place the generator into the programming mode. Refer to section 3C.1.1.
From the GENERATOR SETUP menu select GEN CONFIGURATION.
From the GEN CONFIGURATION menu select AEC SETUP.
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.
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.
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.
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.
From the GEN CONFIGURATION menu select AEC CALIBRATION.
From the AEC CALIBRATION menu select FILM SCREEN 1 (the slowest film screen
combination).
CHANNEL 1
R1
R1
R1
R1
Table 3D-10: AEC board gain pot designations
CHANNEL 1
R11
R91
Table 3D-11: Short AEC time compensation pot designations
Rev. D Millenia / Indico 100 Series Service Manual
Action
CHANNEL 2 CHANNEL 3
R2 R3
R2 R3
R26 R27
R2 R3
CHANNEL 2 CHANNEL 3
R12 R13
R92 R93
CPI Canada Inc.
CHANNEL 4
R4
R4
R28
R4
CHANNEL 4
R14
R94
Ch # 740904-06