CPI Canada Inc.
AEC Calibration
3D
Use and disclosure is subject to the restrictions on the title page of this CPI document.
CMP 200
®
Service Manual Ch # 901476-05 Rev. A
Page 3D-9
3D.2.4 AEC Board (5-Field Ion Chambers)
The AEC board shown below is designed for use with various three-of-five-field ion chambers as per AEC
compatibility matrix SUP73938900.
This board is fitted with 15 pin D connectors J1 and J2.
J5
J1
J2
C
P
I CA
NA
D
A
INC
.
3 OF
5
F
IEL
D ION
AEC BOA
RD
JW
7
JW8
R1
1
R12
JW5
JW
6
Figure 3D-4: Three-of-five-field ion chamber AEC board (assembly 739389)
AEC board input assignment:
•
Ch 1 = J1.
•
Ch 2 = J2.
The following potentiometers are used for AEC gain adjustment:
•
R11 is used for channel 1 gain adjustment.
•
R12 is used for channel 2 gain adjustment.