L-3 Communications 3261607 Thermal-Eye 250D, Инструкция по эксплуатации

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Use and Care of Optional Lenses (cont’d)
Cleaning
The optical surfaces of the lens should only be cleaned
when visibly dirty. Care should be taken to avoid
touching the exposed lens faces. Skin acid left behind
with fingerprints can be damaging to coatings and
lens substrates. First use a jet of air or blow across the
surface to remove any sand or abrasive particles
before cleaning. If oil, water spots, or fingerprints
form on the optical surfaces, clean as soon as possible
using a soft cotton cloth and mild neutral soap diluted
with lukewarm distilled water (1 part soap to 100
parts water), followed by reagent grade isopropyl
alcohol or acetone swab. Dust can be removed gently
using an alcohol or acetone swab.
Note: Avoid swabs that incorporate plastic stems as
some plastics will dissolve in alcohol or acetone.
The non–optical surfaces of the lens can be cleaned
with water, mild detergents, and a soft cloth.