Thermalert GP Series Operator’s Manual 63
B.7.7 Cleaning the Sensing Head Lens
Keep the lens clean at all times. Any foreign matter on the lens will affect
measurement accuracy. However, care should be taken when cleaning the
lens. To clean the lens, do the following:
1. Lightly blow off loose particles.
2. Gently brush off remaining particles with a soft camel hair brush.
3. Clean remaining “dirt” using a cotton swab dampened in distilled water.
Do not scratch the surface.
For finger prints or other grease, use any of the following:
• Denatured alcohol
• Ethanol
• Kodak
®
lens cleaner
Apply one of the above to the lens. Wipe gently with a soft, clean cloth until
you see colors on the surface, then allow to air dry. Do not wipe the surface
dry, this may scratch the surface.
If silicones (used in hand creams) get on the lens, gently wipe the surface
with Hexane. Allow to air dry.
WARNING
Do not use ammonia or cleaners with ammonia on the lens, this
may result in permanent damage to the lens’ surface.
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