Kowa VX-20, Instruction Manual, Page: 68 / 88

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The retinal camera is a precision instrument and daily maintenance and inspection may affect the imaging
results. Please read this section carefully in order to use this instrument correctly and safely.
7.1 Daily maintenance
1) Close the application of the main unit when the photographing is finished, and make sure to turn off the
power switch. Place the lens cap on the objective lens, set the panning lock and the optical head base
lock, and place the dust cover over the instrument.
2) Check that no dust, debris, finger print, or body fluid is found on the objective lens. Confirm that the ob-
jective lens is clean before you use the instrument. Confirmation of dirt is easier in mydriatic color mode
with observation light intensity adjusted to visible light.
3) Clean the dirt of this instrument according to routine cleaning method.
4) If it is not used for a long period, unplug the power code for safety. When the instrument has not been
used for a long period of time, confirm if any errors are in each setting of this instrument.
Important
◇ If the retinal camera in a cool room is suddenly moved to a warmer room, or if the room in which the
instrument is located is heated rapidly, the objective lens and/or internal lens may be fogged. Wait for
a while until the lens is clearly defogged before starting photographing. Or, images may be out of fo-
cus.
◇ When condensation occurs repeatedly, lenses may get moldy. When such a case has occurred to
you, contact Kowa or your Kowa dealer.
7 Maintenance and inspection