Oce 7050, Technical & Service Manual, Page: 142 / 275

ed. 6 09 Originals 503
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001
The condition of the copier should be according to all the adjustment proce-
dures when measuring copy quality. Further the environmental condition must
be between 30-60 % R.H. and 20-27
°
C.
1
Optical density (O.D.)
The O.D. must be
≥
0.7 and
≤
1.3. Measure it on 10 places at bar
Ib
and deter-
mine the average. Compare it with your Agfa grey chart.
2
Difference in O.D. in copy
The difference in O.D. in a copy must be < 0.25. Measure it on 10 places on
bar
Ib
and determine the difference between maximum and minimum value.
3
Background variation in O.D.
Make a copy with the test original at exposure setting -4. Determine the O.D.
difference on the grey bar
Ia
. This must not exceed 0.2.
4 Weak / thin line reproduction
On a copy without background, line Vb must be contineously visible at at least
one exposure step.
5
Resolution
At least 7 out of 11 test patterns of 3.6 lines/mm must be open in both direc-
tions.
6
Overexposure of background
Cell 5 (O.D. = 0.35) must not be visible at the maximum (+4) exposure setting
(See 04 Exp.
301 adj. 1 ).
7
Synchronisation
Reproduction of 2 lp/mm must be open over the full length.
8
Fusing on paper
Fold test in area with high O.D. The white line must be < 0.5 mm (See 08 Fix.
301 adj. 1 for problems with polyester film).
9
1:1 accuracy
≤ ±
0.5% for sizes upto A0/E formats
≤ ±
1% for length upto 3 metres
No guarantee over 3 metres (See 09 Ori. 301 adj. 1 ).
10
Image position (leading edge)
The leading edge must be within
±
5 mm. Compare leading edge copy with
leading edge test original (See 15 Pap. 301 adj. 1 ).