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12
Prior Scientific
12. Bulb Replacement and Adjustment
Halogen bulbs have a finite life and will need replacing from time to time. Replacement
bulbs, part number W3257, are available from Prior Scientific.
To change the bulb;
A. Switch off the microscope and isolate from the mains electrical supply
B. Remove the eyepieces from the viewing head to prevent them falling out
C. Lay the microscope on its back to gain access to the base plate
D. Loosen the screw which holds the lamp cover to the base plate
E. Open the lamp cover to expose the bulb holder
F. Remove the old bulb and replace it with
the correct replacement bulb (part no.
W3257, 12V 30W push fit double pin type)
by sliding upwards in its holder. Do not
handle the bulb with bare fingers, hold it in
a piece of paper tissue or in the bulb
wrapping material. Finger marks can cause
contamination which blackens the bulb
when it is switched on. If the bulb has been
touched with the fingers, clean it with a
tissue moistened with alcohol.