GE HealthCare CONFIDENTIAL
Direction 5936427, Rev. 1 LOGIQ Totus Basic Service Manual
6 - 8 Section 6-2 - Monitor Adjustments
Brightness
Contrast
Before making any adjustments, record the settings for
contrast and brightness. In a dimly lit room, adjust the
monitor to Brightness 50 and Contrast 40. Increase the
contrast until the left most block in the second row from
the bottom is just visible.All the remaining blocks in the
last 2 rows of the image should now be visible.Reset
the contrast and brightness to the recorded levels.
LN1 to LN18
Luminance for different grayscale levels. Usually, the
facility’s Biomed Engineer tests each gray level map on
the monitor from LN-1 to LN-18 with a light meter and
then graphs these on a scale to ensure that the curve
falls within the GSDF’s standard.
This can be performed with all three LOGIQ Totus
monitors with GSDF enabled. Generally, this is
performed yearly.
LN-1
LN-18
QC
Quality Control. Confirm that this image is clear and
crisp, without jagged edges or lines.
Table 6-3 Test Patterns (Continued)
Test
Pattern
Description Corresponding Graphic
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