13900-103 Rev. A Page 31
Cleaning
Introduction
This section contains the cleaning procedures. Names
given to parts are the same parts as referenced in the
AT550 Parts Manual (P/N 13900-102).
Special Tools & Equipment
None Required
Warnings & Cautions
CAUTION: DO NOT USE SOLVENTS OR STRONG CLEANING
SOLUTIONS ON ANY PART OF THIS INSTRU-
MENT OR DAMAGE MAY OCCUR.
CAUTION: USE OF ALCOHOL ON THE LIQUID CRYSTAL
DISPLAY (LCD) MAY CAUSE DAMAGE TO THE
DISPLAY.
Alignment Window Cleaning Procedure
Refer to Dissassembly and perform all the steps indicated
before perform the following procedure.
CAUTION: DO NOT USE ALCOHOL, SOLVENTS OR STRONG
CLEANING SOLUTIONS ON THE ALIGNMENT
WINDOWS OR DAMAGE TO THE WINDOWS WILL
OCCUR.
1. Refer to Figure CL-1 and locate the Rear Mask
Windows and wipe the outside surfaces with a clean,
long handle cotton-tip swab moistened with a mild
detergent solution (1 cc of liquid dish soap to one liter
of clean, filtered water (filtered below 5 microns)) to
remove dirt and contaminants.
2. Remove any remaining dust or foreign particles using
only clean, dry, compressed air at less than 90 psig
(620 kPa) on both sides of the Rear Mask.
Air Tube Cleaning
Clean the end of the air tube (also referred to as the
nosepiece) with a clean, soft, cotton cloth moistened with
a mild detergent solution (1 cc of liquid dish soap to one
liter of clean, filtered water (filtered below 5 microns)) to
remove dirt and contaminants.
Note: Use caution when cleaning the end of the airtube
as misalignment of the nosepiece cover by
pressing against the airtube assembly can cause
asterisk readings.
Figure CL-1. Rear Mask Windows
External Cleaning Procedure
Clean the external surfaces of this instrument using a
clean, soft cloth moistened with a mild detergent solution
(1 cc of liquid dish soap to one liter of clean, filtered water
(filtered below 5 microns)). DO NOT USE ALCOHOL.
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