Mould Pellet Replacement - Scan Optics SO-5000 User Manual

SO-5000 Ophthalmic Microscope

MOULD PELLET REPLACEMENT

The Scan Optics SO-5000 series microscopes are fitted with mould protection which lasts for
approximately 3 years, but will be dependent on the storage conditions and humidity of the local
environment. In extreme tropical climates it may be necessary to change the mould protection as
frequently as every year.
A guide to when the mould protection should be changed is placed on a sticker on the front of the
microscope head. However this is indicative only and users should be guided by their own experience
and knowledge of local conditions.
As a general precaution, always store the microscope head in a protective bag when not in use, and
replace the eyepieces with the protective eyepiece caps.
To replace the mould protection pellet, refer to figure 14. First disconnect the zoom power cable and
remove the zoom drive cover located on the right side of the microscope head. This will expose a
large Philips headed screw which fixes the zoom drive assembly to the microscope mounting bracket,
by means of a cylindrical spacer located behind the zoom drive plate. Loosen this screw and the
grubscrew located directly opposite, on the left side of the microscope head. This will allow the entire
microscope head to be lifted clear of its mounting bracket.
Place the microscope head down carefully, and remove the two screws that hold the back cover of
the microscope. Note that in microscopes not fitted with video accessories, the same procedure
should be followed, but only a single screw needs to be removed to undo the back cover. Remove the
back cover carefully, and locate the circular anti-mould pellet that is adhered to the inside of the
microscope head. Replace the pellet with a new one, peeling the back off to reveal the new adhesive.
Take care not to touch any internal optical components, as these are easily damaged and are difficult
to clean correctly if smudged by fingerprints or exposed to dirt of any kind.
Then replace the back cover of the microscope and place the assembly carefully back in its mounting
bracket. Fix the mounting screw through the cylindrical spacer and tighten it in to the thread in the
mounting bracket. Finally, tighten the remaining grubscrew to fix the microscope head back in place.
ISSUE NUMBER: 5.0
DATE: 11/04/02
User Manual
SUPERSEDES: 4.0
DATE: 22/05/01
WRITTEN BY: RJK
DATE: 22/08/97
Page 25 of 36
CHECKED BY: NW
DATE: 22/08/97