Maintenance Procedures; Scope Of Ps-27 Maintenance; Cleaning Procedures - ATN PS-27 Operator's Manual

4.3. MAINTENANCE PROCEDURES

4.3.1. SCOPE OF PS-27 MAINTENANCE

The PS-27 maintenance consists of external inspection of its com-
ponents for serviceability, cleaning and installation of the standard
and optional accessories. Maintenance instructions covered else-
where in this manual (PMCS, troubleshooting, etc.) are not repeat-
ed in this section.
CAUTION
The PS-27 is a precision electro-optical instrument and must be
handled carefully at all times to prevent damage.

4.3.2. CLEANING PROCEDURES

A. Cleaning of the PS-27
(1) Gently brush off any dirt from the sight body using only a
clean soft cloth.
(2) Moisten the cloth with fresh water and gently wipe the exter-
nal surfaces (except glass surfaces).
(3) Dry any wet surfaces (except lenses) with another dry and
clean soft cloth.
(4) Using lens brush, carefully remove all loose dirt from glass
surfaces.
(5) Slightly dampen a cotton swab with ethanol and lightly and
slowly wipe the lenses and the light sensor. Clean the glass
surfaces by circular movements from the centre to the edge,
not touching the lens holders and changing cotton swab after
each circular stroke. Repeat this step until the glass surfaces
are clean.
B. Cleaning of accessories
Clean accessories with a soft brush (cloth) and soap and water as
required.
CAUTION
Dry thorougly each item before replacing into the storage case.
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