TM 9-129-357-15
which may hamper, damage, or cause improper
in a heated strongly concentrated source which
operation of equipment.
will cause inaccuracy, malfunction, or damage to
the instrument.
(4) The use of diesel fuel oil, gasoline, ben-
zene (benzol) or carbon tetrachloride for clean-
b. General Precautions in Cleaning.
ing is prohibited.
(1) Dry-cleaning solvent and volatile mine-
ral spirits are inflammable and should not be
c. Replacement of Instrument Light M2 Lamps
and Battery.
used near an open flame. Fire extinguishers should
be provided when using these materiels. Use only
(1) If lamps (fig. 1-1) are defective, re-
in well-ventilated places.
move and discard lamps.
(2) These cleaners evaporate quickly and
(2) Replace old lamps with new ones.
have a drying effect on the skin. If used without
(3) If battery is defective remove and dis-
gloves, they may cause cracks in the skin, and,
card.
in the case of some individuals, mild irritation
(4) Replace old battery with a new one.
or inflammation.
(5) Check that instrument light functions
(3) Exercise care when cleaning, insuring
properly (light will illuminate).
complete removal of all residue or sediment,
