HF Series Generators
Calibration
CA-1036R2
35
10. Insert a cassette with the Medium Film/Screen combination used by the
customer. Make an exposure, develop the film and check the Optical
Density, it should be 1.0 (or the customer preference O. Density).
11. To change the density:
G For Ion Chamber with Gain switches
:
-- If the Optical Density obtained is 33% above of the desired
density, increase the gain with the switches. Repeat step-10.
-- If the Optical Density obtained is 33% below of the desired
density, decrease the gain with the switches. Repeat step-10.
-- If the Optical Density obtained is in between 33% of the desired
density, change the AEC calibration number. Exit from the “Go to
User Mode” screen by pressing the “Manual Calibration” button
and in calibration mode set the new AEC calibration number for the
respecetive Memory Location (E04, E09, E20 or E23). The Optical
Density increases / decreases when the calibration number is
increased / decreased. Then enter in “User Mode” screen and
repeat step-10.
G For Ion Chamber with Master Gain potentiometer
, adjust this
potentiometer until the desired density is obtained by repeating
step-10. If the adjustment is not achieved with the Master Gain
potentiometer, change the AEC calibration number. Exit from the
“Go to User Mode” screen by pressing the “Manual Calibration”
button and in calibration mode set the new AEC calibration
number for the respecetive Memory Location (E04, E09, E20 or
E23). The Optical Density increases / decreases when the
calibration number is increased / decreased. Then enter in “Go to
User Mode” screen and repeat step-10.
The AEC accuracy is better in all the useful range as the AEC
calibration number is closer to 70.
12. Repeat the above steps for all the Ion Chambers installed with the
Generator.
13. Exit from the “Go to User Mode” screen by pressing the “Manual
Calibration” button and exit from calibration mode.
14. Record all the values for the Memory Locations in the Data Book.
Note .
To Next Page
Loading...