AVR200 and AVR300 User Guide
8.5.1 Cleaning External Surfaces
Wipe down with a clean, lint-free cloth moistened (not wet) with plain water, ammonia-free glass cleaner, or isopropyl alcohol. Never wipe down with acetone or other harsh solvents, which can damage painted or plastic surfaces.
8.5.2 Cleaning Optics
Caution
Do not touch lens surfaces with your fingertips. Fingerprints can destroy optical coatings over time. Only clean optical surfaces with proper cleaning supplies, and then only when necessary.
To clean the lens, refer to the following guidelines:
• If a lens is covered with loose dust, do the following:
• Use a can of optical grade (oil-free) canned compressed air to blow off the dust. Be careful not to shake the lens, or propellant can blow onto the lens.
• Use a lens brush to gently wipe off the dust.
• If the lens is soiled with greasy deposits which cannot be blown or brushed off, use an alcohol-based commercial lens cleaner and a lens tissue or a lens cloth. These items are available from camera stores
• Apply the lens cleaner generously to dissolve the grease, and then blot off the lens cleaner and dissolved grease using minimum motion.
• Avoid rubbing the lens, since hard particles from the deposit or the lens cloth could scratch the optical coatings.
• If the greasy deposits do not come off with the lens cleaner, use a stronger solvent such as reagent-grade acetone as a last resort.
• Gently wipe the lens surface while moving the lens cloth to always present a clean surface to the lens.
• Wipe in a circular manner moving from the center of the lens toward the outer edge.
• Do not reuse the lens cloth to avoid redepositing contaminants.
Figure 33. Optical Grade Compressed Air
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