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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-5
3D.2.2 AEC Board (Ion Chambers)
The AEC board shown below is compatible with various makes / models of ion chambers as per AEC
compatibility matrix SUP73461400.
This board will be fitted with 9 pin D connectors (J11 to J14), or with 12 pin in-line connectors (J1 to
J4), depending on the application.
R79
AEC DEDICATED ION CHAMBER
CPI CANADA INC
Made in Canada
J4
J3
J1
J2
J11
J14
JW1
JW2
J13
J12
R11
R12
R13
R14
R1
R2
R3
R4
JW3
JW4
JW7
JW8
JW5
JW6
J5
ML_IONBD.CDR
Figure 3D-2: Dedicated ion chamber AEC board (assembly 734614)
AEC board input assignment (examples only, actual receptor assignments may vary):
•
Ch 1 = J1 / J11 - Table Radiographic Bucky.
•
Ch 2 = J2 / J12 - Vertical Wall Bucky.
•
Ch 3 = J3 / J13 - Spot Film Device.
•
Ch 4 = J4 / J14 - Aux. (Extra Bucky, Digital Acquisition, etc).
The following potentiometers are used for AEC gain adjustment:
•
R1 is used for channel 1 gain adjustment.
•
R2 is used for channel 2 gain adjustment.
•
R3 is used for channel 3 gain adjustment.
•
R4 is used for channel 4 gain adjustment.
The following potentiometers are used for short AEC exposure time compensation:
•
R11 is used for channel 1 short exposure time compensation.
•
R12 is used for channel 2 short exposure time compensation.
•
R13 is used for channel 3 short exposure time compensation.
•
R14 is used for channel 4 short exposure time compensation.