Welch Allyn Video Colposcope - User Manual - Manual (Page 26)

24 Operation Welch Allyn Video Colposcope
Mag Index Control
Activate the magnification index button by pressing the blue button located on the
right side of the colposcope (See “Side Views” on page 12.). The Mag Index refers to
magnification relative to a 14" monitor. Deactivate the magnification index by pressing
the mag index control again.
To determine the magnification*, multiply the mag index by the number in the table
below.
*Magnification is the approximate size of an object displayed on a display device (monitor,
video print, etc.) divided by the actual size of the object.
Green Filter Control
Press the green filter button on the left side of the video colposcope ( Figure on page 12)
to activate the electronic green filter. Press the green filter button again to deactive the
filter.
Polarization Filter Control
The Polarization Filter control can be rotated to reduce glare from the image as desired.
The filter is completely engaged (minimum glare) when the control is fully rotated to the
left. The filter can be disengaged by returning the Polarization Filter control to the full right
hand position.
Illumination Beam Director
The illumination beam director can be rotated up to 45° clockwise or counterclockwise to
better illuminate the examination area. To rotate the director, grasp the flat sides and twist
in either direction as desired. The illumination beam director moves with some resistance.
This helps to hold it securely in the desired position. The center position can be recovered
by returning the director to the detent position.
Note Pressing the scan button on the monitor or activating this menu option sets the
display size to -3% “under” image scan size and alters the size of the image on
the screen, making the magnification index displayed inaccurate. Activating the
button or mem option briefly displays the word “under” on the monitor screen
and a red light displays on the scan button. To change the scan size back to
normal, press the scan button again and the word “over” briefly appears on the
monitor screen. This is the normal setting.
DISPLAY DEVICE Sony 14" Monitor, model
LMD1410
NUMBER BY WHICH TO MULTIPLY MAG INDEX 1.0
EXAMPLE: Mag. Index on screen 5
EXAMPLE: Magnification 5