AGFA Drystar 5300, Reference Manual

Page: 121 / 210

121
2920B EN 20031206
Performing the annual QC test (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
Use the QC test image of the weekly test and measure the dimensions A and
B of the geometric square. Refer to
‘Establishing the image geometry
reference values’ on page 116 .
3
Record these values as measured dimensions A and B on the Drystar 5300
Chart 4 (‘Drystar 5300 Geometric Consistency Control Chart’). Refer to
Appendix C
‘Quality Control Charts’ on page 199 .
4
Compare the A and B values with the reference values A
ref
and B
ref
on the
Chart 4 (‘Drystar 5300 Geometric Consistency Control Chart’).
The differences between measured dimensions 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 are outside of limits, contact Agfa
service to solve the problem.