2.2; Aec Board (Ion Chambers) - CPI CMP 200 Series Service Manual

CPI Canada Inc.
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.
J14
J4
J13
J3
J12
J2
J11
J1
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.
Use and disclosure is subject to the restrictions on the title page of this CPI document.
®
CMP 200 Service Manual
CPI CANADA INC
Made in Canada
AEC DEDICATED ION CHAMBER
JW2 JW1
JW4 JW3
JW6 JW5
JW8 JW7
Ch # 901476-05
R79
R11 R12 R13 R14
R3
R1 R2 R4
Rev. A
3D
AEC Calibration
J5
ML_IONBD.CDR
Page 3D-5