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D
4500 U
RYSTAR
SER MANUAL
Performing the Annual QC tests
Geometric Consistency Test
To be able to notice fluctuations in image size and aspect ratio, you must
perform this procedure once a year.
First, perform the daily test.
1
Measure the distances A and B of the geometric square on the QC test image.
2
Refer to
'Establishing the image geometry reference values'
Make sure to measure distance A from the left edge of the left line to the
right edge of the right line and distance B from the upper edge of the
upper line to the lower edge of the lower line.
We strongly recommend using a 30 cm (12 inch) machinist scale with
0.5 mm divisions (1/64 inch).
Record these values as measured distances A and B on Chart 4 ('Drystar 4500
3
Geometric Consistency Control Chart').
Compare the measured A and B dimensions with the reference dimension
4
values, A
ref
Consistency Control Chart').
The differences between the measured dimensions of A and B and the reference
values A
ref
Check for image distortion.
5
Calculate the aspect ratio by dividing A by B.
6
The result must be 1 +/- 0.01
If the image size or distortion values exceeds the limits, contact Agfa
service to resolve the problem.
60
Advanced operation (key-operator mode)
and B
on the Drystar 4500 Chart 4 ('Drystar 4500 Geometric
ref
and B
should be less than or equal to 1.0%.
ref
on page 54.
2801E EN 20050215
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