Bulb Replacement - Keeler Ophthalmoscope Instructions For Use Manual

5. Instrument heads

Bulb replacement

Bulbs / LED's can reach high temperatures in use – allow
to cool before handling.
• Always ensure that the handle rheostat is turned off before
fitting an instrument head or changing a bulb
• Care should be taken when handling halogen bulbs. Halogen
bulbs can shatter if scratched or damaged
• After removal of the bulb / LED do not touch the bulb / LED
contacts and the patient simultaneously
• Keeler bulbs can only be used in the instrument for which
they are designed – refer to part number list in section 12
• Ensure the replacement bulb is the correct voltage. See base
of bulb
• Blue = 2.8v for dry cell battery handles
• Red = 3.6v for rechargeable handles
• Black = LED
• Loosen the set screw securing the instrument
head to the handle (GenMed Wall Unit only)
• Remove the head by holding it horizontally with one hand
while rotating the handle counterclockwise with the other
• Take care to ensure the battery / bulb does not drop out when
the head and handle are separated
• Remove the faulty bulb and dispose of in accordance with
local environmental regulations
• Replace the bulb with one of the correct voltage and type.
Ensure that the location key is aligned with the aperture in
the instrument head
• Refit the handle to the head by rotating it clockwise while
horizontal. If required, secure the head in
place with the set screw provided
(GenMed Wall Unit only)
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