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M1000/3000 Nova
Register 3
SPB7-230.033.11
Page 16 of 22
Siemens AG
Installation and Start-Up
Rev. 06
05.06
CS PS SP
Medical Solutions
11 - 16
Calibrating and adjusting the AEC
7. Before calibrating the installed correction tables, it is necessary to make a rough
setting of the sensitivity correction for the chosen object table group. Insert the
reference cassette, with a new film, in the object table.
8.
Press <F3>.
9. Follow the instructions in the message box for performing an exposure.
10. Remove the exposed film, make a sensitometer strip and develop the film.
11. Measure O.D. in the measuring point (Fig. 2, Page 11 - 8) as well as OD
strip
on the
sensitometer strip (OD
m
and OD
strip
).
If it is the very first exposed film, use OD
strip
as OD
strip_ref
.
Correct the value according to "Correction of the measured Optical Density
(O.D.)" on Page 11 - 7.
12. If the value differs from
1.5 O.D.
adjust the values in dialog
AEC - Sensitivity
correction
(Fig. 5), save the new Sensitivity correction value with <F2> and repeat
the procedures described from step 7.
If the value is satisfactory, proceed by pressing <F4>.
Make sure the backup floppy is inserted.
Do not use a compression plate.
One adjustment step of sensitivity correction (1/8 E.P.)
corresponds to approximately 0.06 O.D. with an
incremental gamma of 5.
It is important to use 1.5 O.D. and the specified AEC
calibration plexi during the procedures under
“Calibrate correction tables”, since measurements are
relative to factory results at 1.5 O.D.
The O.D. preferred by the customer can be adjusted
later either in Sensitivity correction or Sensitivity.
NOTE
NOTE
Please put x cm of Plexi
on the object table.
Perform an exposure and
press <ENTER> when ready
or <ESC> to cancel.
<ENTER> - ok / <ESC> - cancel
M
A
M
0
0
7
2
8
NOTE
NOTE