![background image](http://html1.mh-extra.com/html/cpi/cmp-200/cmp-200_service-manual_2675020209.webp)
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-16
3D.3.0 AEC CALIBRATION (TABLE BUCKY) Cont
CAUTION:
DURING THE FOLLOWING CALIBRATION PROCEDURE, BE SURE THAT THE SELECTED TECHNIQUES WILL NOT
OVERLOAD THE X-RAY TUBE. USE CAUTION WHEN REPEATING EXPOSURES AS THIS MAY QUICKLY OVERLOAD THE X-
RAY TUBE. MOST X-RAY TUBE MANUFACTURERS RECOMMEND NO MORE THAN TWO HIGH SPEED STARTS PER MINUTE.
NOTE:
BE SURE TO USE THE SAME CASSETTE FOR EACH EXPOSURE AT THAT FILM SPEED.
FILM SPEED
mAs @ 75 kV
100 16
200 8
400 4
800 2
Table 3D-7: Film speed vs. mAs @ 75 kV
The mAs values noted in the above table represent the approximate desired mAs at an SID of 40 in. (100 cm), using a grid with a 12:1 ratio.
All measurements were done with HVL = 3 mm Al @ 75 kV.