Preparing system for use Instructions for Use
305935-9900-000–1.3 –2020-08-25-for USA 33 / 65
• Never cover any ventilation openings.
• If ventilation grids on the carrier arm covers are covered e.g. by
drapes, this may lead to overheating of the parts inside the carrier
arm and deactivation of the light source.
• When attaching the sterile drapes, make sure there is enough slack in the drapes to
allow for movement of the microscope carrier and surgical microscope. It is especially
important that the drapes are completely loose around the handgrips. The surgeon
must be able to reliably operate the controls through the drape.
• A drape adapter is needed for attaching the drape on Varioskop 230. For details, please
see Section 5.7.2.
For detailed information on sterilization, please refer to the product datasheet of EXTARO 300 or
consult your local authorized ZEISS partner.
Finding ergonomic working position
(1). Adjust the height of suspension arm and the
chair to bring the microscope to working area.
The user should keep his/her back upright while
working with the microscope. The working
distance (WD) of the microscope can be varied
from 200 to 430mm.
(2). Adjust the focus to get a sharp image by rotating
the knurled ring of the Varioskop in clockwise or
counterclockwise directions.
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