Inspection Of The Automatic Brightness Control Function - Olympus CV-180 Instructions Manual

3.3 Inspection of the automatic brightness control
function
EVIS EXERA II VIDEO SYSTEM CENTER CV-180
1.
Confirm that this instrument is connected to the light source using the light
source cable or light control cable (see Section 8.4, "Light source" on
page 164).
2.
According to the directions given in the light source's instruction manual,
confirm that the light source's brightness control is set to "AUTO" and that
the brightness level is in the center of the adjustable range.
3.
Move the distal end of the endoscope between 1 and 3 cm from your palm.
Confirm that the brightness of the image on the monitor remains constant.
Confirm that the light emitted from the distal end of the endoscope changes
in your palm.
4.
Hold the distal end of the endoscope 3 cm from your palm. Use a piece of
gauze, etc. to prevent the endoscope's distal end and your palm from being
exposed to extraneous light. View the image on the monitor.
5.
Confirm that the brightness of the image on the monitor changes when the
light source's brightness level is changed.
• In combination with some endoscope models, the space
between the distal end of the endoscope and your palm in
which the automatic brightness control function is available
will be smaller than 1 - 3 cm. Please refer to the instruction
manual of the endoscope used.
• Depending on the light source connected, the exposure level
indicator on the video system center goes off. Control the
brightness on the light source referring to "Brightness
adjustment (Exposure)" on page 71.
Chapter 3 Inspection
37