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Constancy Test of the Monitor Quality Assurance
F.6-8 SOMATOM Spirit
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Testing the homogeneity of
the image brightness
F.6
This test ascertains any deviations in the luminance (L) within
the image.
F. 6
✧ Select test image 3.
✧ With the luminance meter measure a point close to the cen-
ter (L
center
) and four measuring points in the corners (L
cor-
ner
).
Maximum deviation of the corner points:
F. 6
1. Cathode ray tube ± 35% (max.)
F. 6
2. Flatscreen ± 20% (max.)
F. 6
Calculation of the deviation in % = 100 x (L
center
- L
corner
) /
L
center
F. 6
fB
.6
F
Visual interference such as ghosting, artifacts, overshoots, light
or dark spots, flickering, and so on, encountered.
F. 6
✧ Please consult your service technician.
F. 6
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