AGFA Drystar 4500 Reference Manual page 135

Establishing the reference values and verifying image quality
After installation of a new Drystar 4500 and before initial use you must
establish Quality Control aim values. These values will be used as the base
line for comparison when daily Quality Control is done. These values should
be determined again after major service, repair or software update.
The following Quality Control aim values must be determined:
The daily operating density levels. Refer to
•
reference density levels'
Drystar 4500 image geometry. Refer to
•
reference values'
Once Quality Control aim values are established you must evaluate the
Spatial Resolution, the Artifact Levels and the Low Contrast Visibility to
determine if the image quality is acceptable. Refer to
Spatial Resolution, Artifact Levels and Low Contrast Visibility'
The Quality Control aim values, the Spatial Resolution and Artifact Levels and
the Image Geometry values are all recorded on the Quality Control charts.
Refer to 'Quality Control Charts'
On these charts, the following test conditions are also recorded:
The type and serial number of the Drystar 4500.
•
The type and emulsion number of the film used to determine the reference
•
values.
The type of densitometer used.
•
The time (day, month, year) that the values were established.
•
Before you can establish the daily operating levels, the Drystar 4500 must
be switched on for at least 15 minutes and it must be calibrated as well.
Refer to
calibration procedures'
2800E EN 20050215
on page 136.
on page 139.
on page 207.
'Switching on the Drystar 4500'
on page 105.
D
RYSTAR
'Establishing the daily operating
'Establishing the image geometry
'Verifying Acceptable
on page 141.
on page 26 and 'Performing the
Advanced operation (key-operator mode)
4500 R
EFERENCE MANUAL
135