Brightness; Color Balance - Pentax EPK-1000 Owner's Manual

(3) BRIGHTNESS

Select the desired brightness control mode, AUTO or XLUM, using the brightness control switch.
AUTO = Automatic brightness control, where the video signal of the endoscope will automatically maintain the brightness level
selected by the brightness adjustment switches. The switch will beep when pressed and the AUTO indicator will light when the
AUTO mode is selected.
If the AUTO brightness mode is selected, select the desired brightness level and the light measurement method, AVE or PEAK,
using the light measurement switch on the front panel or the endoscope control buttons.
AVE = The brightness level is automatically adjusted with respect to an averaging of the brightness of the video signal.
PEAK= The brightness level is automatically adjusted with respect to a peak (maximum) value of the brightness of the video signal.
The switches will beep when pressed and the AVE or PEAK label will light when either is selected.
-Halation is defined as the appearance of a halo around an area of extreme brightness. Halation may occur if the AVE mode
NOTE
and PEAK mode are selected. If halation is observed and if it distorts the endoscopic image, one should reduce the brightness level.
XLUM= Manual brightness control, the user will select the brightness level by using the brightness adjustment switches.
The switch will beep when pressed and the XLUM label will light when manual mode is selected.
WARNING - To protect users eyes and avoid risk of thermal injury, select the Auto mode. When the processor is used as a
light source, select the XLUM mode with the minimum required brightness. When the procedure is suspended for a while, turn
OFF the lamp switch or select the XLUM mode with the lowest brightness.
There are eleven (11) brightness levels. The brightness level will be displayed as a value -5 to +5 on the brightness indicator on
the front panel.
To change the brightness level;
Press the Up switch (△) to increase the level.
Press the Down switch ( ▽ ) to decrease the level.
The switches will beep when pressed and the brightness level indicator will change accordingly.
- To protect the users eyes and avoid risk of thermal injury during an endoscopic examination, use only the
CAUTION
minimum amount of brightness required.
-The video processor has a battery backup memory and will retain the last selected brightness value even if the unit is
NOTE
turned OFF or disconnected from the power outlet.

(4) COLOR BALANCE

There are eleven (11) color levels for both Red and Blue hue.
They will be displayed as a value -5 to +5 on the monitor display at either end of the color bar.
All the switches described above will beep when pressed.
-The video processor has battery backup memory and will retain the last selected color balance levels even if the unit is
NOTE
turned OFF or disconnected from the power outlet.
The white balance function adjusts the white balance of each endoscope. Proper
white balance requires the use of the white balance adjuster attached to the PENTAX
System Cart. Contact your local PENTAX service center for the details if required.
1) Put the distal end of the video endoscope into the white balance adjuster which
is supplied with the processor.
2) Watching the monitor, adjust the position of the distal end of the scope in the
adjuster so that the circle at the bottom of the white balance adjuster can be
recognized on the full screen.
● 3) Press the white balance switch while keeping the scope distal end stationary in
the adjuster more than three seconds.
If the white balance is established, "WB OKI" is displayed on the screen.
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