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CPI Canada Inc.
AEC Calibration
3D
Millenia / Indico 100 Series Service Manual Ch # 740904-06 Rev. D
Page 3D-1
CHAPTER 3
SECTION 3D
AEC CALIBRATION
CONTENTS:
3D.1.0 INTRODUCTION..............................................................................................................................................3D-2
3D.1.1 A
2
EC
2 TM
(Automated Automatic Exposure Control Calibration)..................................................................3D-2
3D.1.2 AEC Limitations: Minimum Response Time.................................................................................................3D-3
3D.1.3 AEC Limitations: Maximum Exposure Times ...............................................................................................3D-4
3D.1.4 Film/Screen Response vs kVp .....................................................................................................................3D-5
3D.1.5 AEC Calibration Range.................................................................................................................................3D-6
3D.1.6 Multiple Spot Compensation.........................................................................................................................3D-7
3D.2.0 PRECALIBRATION SETUP.............................................................................................................................3D-8
3D.2.1 AEC Setup Worksheet..................................................................................................................................3D-8
3D.2.2 AEC Precalibration Checks ........................................................................................................................3D-10
3D.2.3 AEC Chamber Installation ..........................................................................................................................3D-10
3D.2.4 AEC Pickup Connections (Overview).........................................................................................................3D-12
3D.2.5 AEC Board (Solid State Chambers) ...........................................................................................................3D-13
3D.2.6 AEC Board (Ion Chambers)........................................................................................................................3D-15
3D.2.7 AEC Board (Universal AEC Board) ............................................................................................................3D-17
3D.2.8 AEC Board (Universal AEC Board With Short AEC Time Compensation) ...............................................3D-19
3D.2.9 AEC Using A PMT ......................................................................................................................................3D-21
3D.3.0 PRECALIBRATION NOTES: .........................................................................................................................3D-22
3D.4.0 ABSORBER EQUIVALENTS.........................................................................................................................3D-22
3D.5.0 AEC CALIBRATION (TABLE BUCKY) ..........................................................................................................3D-23
3D.5.1 Break point calibration worksheet...............................................................................................................3D-28
3D.6.0 SHORT AEC TIME COMPENSATION (IF APPLICABLE)............................................................................3D-30
3D.7.0 AEC DENSITY CALIBRATION ......................................................................................................................3D-31
3D.8.0 RLF COMPENSATION ..................................................................................................................................3D-35
3D.9.0 MULTIPLE SPOT COMPENSATION ............................................................................................................3D-38
3D.10.0 AEC CALIBRATION (WALL BUCKY).........................................................................................................3D-40
3D.11.0 AEC CALIBRATION (AUX, SFD, ETC) ......................................................................................................3D-43