CPI Canada Inc.
AEC Calibration
3D
Millenia / Indico 100 Series Service Manual Ch # 740904-06 Rev. D
Page 3D-17
3D.2.7 AEC
Board
(Universal
AEC
Board)
The AEC board shown below is factory configured to be compatible with most makes/models of AEC
chambers (ion and solid state) on the market. This assembly also contains a low current, high voltage supply
for a photomultiplier tube (PMT). The PMT supply is located on the upper board, which also contains the
connectors to interface to the AEC pickup device(s).
Figure 3D-10: Universal AEC board
AEC board input/output assignment:
•
Ch 1 = J1 - Table Radiographic Bucky.
•
Ch 2 = J2 - Vertical Wall Bucky.
•
Ch 3 = J3 - Spot Film Device.
•
Ch 4 = J4 - Aux. (Extra Bucky, Digital Acquisition, etc.).
•
J7 = High voltage output for the PMT (if used)
The following potentiometers are used for AEC gain adjustment:
•
R1 is used for channel 1 gain adjustment.
•
R26 is used for channel 2 gain adjustment.
•
R27 is used for channel 3 gain adjustment.
•
R28 is used for channel 4 gain adjustment.
Refer to the end of subsection 3D.2.7 for the procedure for adjusting R10, R19, and R24.