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Page Title:
Table 4-1. Preventive-Maintenance Checks and Service |
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 TM 9-6685-202-14
Table 4-1. Preventive-Maintenance Checks and Service
INTERVAL AND SEQUENCE NUMBER
ITEM
PARAGRAPH
BEFORE
DURING
AFTER
TO BE
PROCEDURES
REFERENCES.
OPERATION
OPERATION
OPERATION
INSPECTED
Daily Service
1
Mounting
Check that barometer is level within
3-5
platform.
one division on leveling scales,
if not, adjust leveling screws.
2
Lamp and
Check that lamp operates. If not,
4-5f and g
batteries
replace if defective, or check and
replace batteries.
3
Cistern and
Check visually for contamination
4-5b
barometer tube.
introduced by auxiliary equip-
ment. Refer instrument to mainte-
nance for replacement of contam-
inated mercury.
Weekly Service
1
Barometer
Perform referenced paragraph to
4-5d
tube
assure that no air bubble is pre-
sent above the mercury level.
2
Rods, scale,
Wipe scale rod, thermometer rod,
4-13
and cam bar
cam, bar, and scale with a few
type A-1.
drops of instrument oil.
Every 6 Months
1
Computing-correct-
Applied correction agrees with com-
4-5c
ing mechanism and
puted value within 0.10 mm.
applied correction
scale (type A-1).
If error is constant, adjust ver-
nier strip. If error is larger than
0.10 mm and variable, refer in-
strument to depot for recalibra-
tion.
4-3
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