4-2
Thermalert ET Series Operator's Manual
4.3
CLEANING THE LENS
Care should be taken to keep the lens clean. Any foreign matter on the lens will affect
the accuracy of the measurement. When cleaning 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 “Q-tip” (cotton swab) dampened in distilled water.
Do not scratch the surface.
4. 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 as this
may scratch the surface.
5. If silicones (used in hand creams) get on the lens, gently wipe the surface with
Hexane. Allow to air dry.
CAUTION
Do not use ammonia, or any cleaners containing ammonia, on the
lens. This may result in permanent damage to the lens surface.
4.4
CUSTOMER SERVICE
Application assistance, calibration and repair service is available. The Service
Department should be contacted before returning any equipment to allow for the
most expeditious response time. In many cases, problems can be solved via tele-
phone, telex or fax. We are at your service.