CPI CMP 200 Series Service Manual page 212

CPI Canada Inc.
3D.3.0 AEC CALIBRATION (TABLE BUCKY) Cont
Step
31. Load the test cassette with fresh film and install it in the image receptor. Using the same technique, expose the film and develop it.
32. Measure the optical density. The optical density should be as per step 18.
33. If the measured O.D. is not the desired value, readjust the 55 kV calibration number, then repeat the previous two steps.
DO NOT READJUST THE AEC BOARD GAIN POT.
34. Once the desired film density is achieved, record the required values in a copy of table 3D-9.
100 speed film screen
Break point
75 kV knee pt.
55 kV
50 kV
65 kV
110 kV
130 kV
85 kV
95 kV
200 speed film screen
Break point
75 kVp knee pt.
55 kVp
50 kVp
65 kVp
110 kVp
130 kVp
85 kVp
95 kVp
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CMP 200 Service Manual
Absorber mAs
20 cm H O 16 mAs
2
15 cm H O 25 mAs
2
15 cm H O 40 mAs
2
15 cm H O 10 mAs
2
25 cm H O 6.3 mAs
2
25 cm H O 5 mAs
2
20 cm H O 10 mAs
2
20 cm H O 5 mAs
2
Absorber mAs
20 cm H O 8 mAs
2
15 cm H O 12.5 mAs
2
15 cm H O 20 mAs
2
15 cm H O 5 mAs
2
25 cm H O 3.2 mAs
2
25 cm H O 2.5 mAs
2
20 cm H O 5 mAs
2
20 cm H O 2.5 mAs
2
Table 3D-8: Target breakpoint calibration factors
Ch # 901476-05 Rev. A
Action
Generator mA Generator BUT mAs
320 mA 320 mAs (MAX)
320 mA 320 mAs (MAX)
320 mA 320 mAs (MAX)
320 mA 320 mAs (MAX)
200 mA 320 mAs (MAX)
200 mA 320 mAs (MAX)
320 mA 320 mAs (MAX)
320 mA 320 mAs (MAX)
Generator mA Generator BUT mAs
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
250 mA 250 mAs (MAX)
3D
AEC Calibration
Page 3D-19