HF Series Generators
Calibration
CA-1036R2
31
9. Make an exposure without film in the cassette and note the Exposure
Time displayed on the Console, it should be approximately 100 ms. If
necessary, change the Copper thickness or mA station and make the
exposure again.
The “Actual Exposure Parameters” area shows the last exposure
parameters when: exposure is finished by the AEC, exposure is
aborted by releasing the exposure control, or after pressing the
“Reset Error” button.
10. Deselect “Center Area” and select “Left Area”. Make an exposure
without film in the cassette and record the Exposure Time. If this time is
not equal to the “Center Area”time(± 7%), check that the Ion Chamber
is parallel to the X-ray Tube and make an exposure again. If it is parallel,
adjust “Left Area” balance potentiometer to increase or decrease
Exposure Time. Repeat this process until both Exposure Times for
“Center Area” and “Left Area” are equal.
11. Deselect “Left Area” and select “Right Area”. Make an exposure without
film in the cassette and record the Exposure Time. If this time is not equal
to the “Center Area”time(± 7%), adjust “Right Area” balance
potentiometer to increase or decrease Exposure Time. Repeat process
until both Exposure Times for “Center Area ” and “Right Area” are equal.
12. Check that the three scan Areas have equal Exposure Time (± 7%):
G “Center Area”with“Left Area”, “Center Area”with“Right Area”,
and “Left Area”with“Right Area”.
G All three Areas.
13. Exit from the “Go to User Mode” screen by pressing the “Manual
Calibration” button and exit from calibration mode.
14. Repeat the above steps for all the Ion Chambers installed with the
Generator.
Note .
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