AGFA Drystar 4500, User Manual, Page: 52 / 84

52
2801E EN 20050215 Advanced operation (key-operator mode)
D
RYSTAR
4500 U
SER MANUAL
4
After the image is printed, the system will display the optical density values:
The displayed values represent the following steps on the test film:
5
Record the density levels on the Drystar 4500 Chart 1 (‘Determination of the
operating levels’). Refer to
‘Quality Control Charts’ on page 77 .
6
Press the Confirm key to return to the main menu.
7
Repeat steps 1 through 6 once a day for five consecutive days, as indicated on
the Drystar 4500 Chart 1.
8
Calculate the average value of the densities from the five images. These values
represent operating levels or aim values, for each density.
Operating Level
Value (Macbeth units)
(according IEC 1223-2-4
or better)
Low density
the density value of the
Low density step
0.4 ± 0.05
Mid density
the density value of the
Mid density step
1.2 ± 0.15
High density
the density value of the
High density step
2.0 ± 0.20
If the mid density value does not meet or exceeds the recommended
values, the cause must be found and the problem solved before any further
clinical films can be printed.
Refer to ‘Maintaining image quality and resolving image quality problems’ on
page 191 of the Drystar 4500 Reference manual and ‘Preventive maintenance
schedule’ on page 61 , or call your local Agfa service organization.
Default densitometer
e.g. Macbeth TR924
0.19
0.36
1.14
1.92
3.10
1.56
2801 E EN UM Drystar 4500.fm Page 52 Monday, February 21, 2005 2:32 PM