Leica DM4000B, DM4000M manual Cleaning Glass Surfaces, Removing Immersion Oil, Cleaning Objectives

11. Care of the Microscope

Cleaning Glass Surfaces

Remove dust on glass surfaces with a fine, dry and fat-free hair brush, by blowing with a blow bag or vacuum suction.

Carefully remove stubborn dirt on glass surfaces with a clean cloth moistened with distilled water. If the dirt still can not be removed, use pure alcohol, chloroform or benzine.

Removing Immersion Oil

Caution!

Follow safety instructions for immersion oil!

First, wipe off the immersion oil with a clean cot- ton cloth, and then re-wipe the surface several times with ethyl alcohol.

Cleaning Objectives

Caution!

The objective may not be unscrewed during cleaning. If damage appears on inner sur- faces, the objectives must be sent to your Leica subsidiary for repair. We also advise against cleaning the inside surfaces of the eyepieces.

The front lenses of objectives are cleaned as de- scribed under "Cleaning Glass Surfaces". The upper lens is cleaned by being blown off with a pneumatic pump.

11.3 Handling Acids and Bases

For examinations using acids or other aggres- sive chemicals, particular caution must be taken.

!Caution:

Be absolutely certain to prevent the optics and mechanical parts from coming these chemicals.

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