AGFA Drystar 4500, User Manual, Page: 60 / 84

60
2801E EN 20050215 Advanced operation (key-operator mode)
D
RYSTAR
4500 U
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.
1
First, perform the daily test.
2
Measure the distances A and B of the geometric square on the QC test image.
Refer to
‘Establishing the image geometry reference values’ on page 54 .
3
Record these values as measured distances A and B on Chart 4 (‘Drystar 4500
Geometric Consistency Control Chart’).
4
Compare the measured A and B dimensions with the reference dimension
values, A
ref
and B
ref
on the Drystar 4500 Chart 4 (‘Drystar 4500 Geometric
Consistency Control Chart’).
The differences between the measured dimensions of A and B and the reference
values A
ref
and B
ref
should be less than or equal to 1.0%.
5
Check for image distortion.
6
Calculate the aspect ratio by dividing A by B.
The result must be 1 +/- 0.01
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).
If the image size or distortion values exceeds the limits, contact Agfa
service to resolve the problem.
2801 E EN UM Drystar 4500.fm Page 60 Monday, February 21, 2005 2:32 PM