Welch Allyn Video Colposcope - User Manual - Manual (Page 25)

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Operation
Power Switch
With the power cord connected to a properly grounded outlet, and the S-video cable
connected to the Video Colposcope and monitor, activate the power switch on the handle
of the Video Colposcope.
Lamp Ignition
Once the Video Colposcope's power switch has been activated, the lamp will ignite. The
lamp requires approximately 11 seconds to warm up.
Focus and Zoom Controls
Once the power switch has been activated, the Video Colposcope will execute a setup
procedure, ending in the low magnification setting, or 4.5x. To obtain coarse focus,
position the distal end of the Video Colposcope approximately 300mm (12”) from the
target. Adjust the Video Colposcope by moving the stand (for vertical stand), or the arm
(for the swing arm stand), until the picture is in focus. Press the + on one of the zoom
controls until maximum magnification is obtained, and readjust the position of the stand
or the swing arm until the picture is in focus. Fine focus, in either direction, is provided by
the focus controls once coarse focus has been achieved. After coarse focus is achieved at
maximum magnification, zoom control can be set to a desired lower magnification by
pressing either zoom control. Focus will be maintained throughout the entire
magnification range once these steps have been completed if the Video Colposcope or
target is not moved.
Note The setup (nominal) setting of the focus controls can be recovered by pressing
one of the zoom + controls for 4 seconds after maximum magnification has been
achieved.