TM 5-6675-322-14
Table 9-1.
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES - Cont
B - Before
W - Weekly
AN - Annually
(Number) - Hundreds of Hours
D - During
M - Monthly
S
- Semiannually
A - After
Q - Quarterly
BI
- Biennially
ITEM
NO.
12
9-22
ITEM TO BE INSPECTED
PROCEDURE
SUPPORT ITEMS - Cont
Service Air Velocity Meter - Cont
3 .
Tip meter to remove pith ball. Place in safe
l o c a t i o n .
4.
Place supplied chemically treated pipe cleaner in
bottom of tube and clean entire length of indicator
t u b e.
5.
Clean scale change orifice with pipe cleaner.
NOTE
Do not use wire or pins to clean calibration
orifice. This can permanently change calibration
accuracy . Use only nylon cleaning bristle
supplied with meter or chemically treated pipe
c l e a n e r.
6.
C l e a n c a l i b r a t i o n o r i f i c e b y g e n t l y i n s e r t i ng
pipe cleaner.
7.
Clean air inlet holes with pipe cleaner.
8.
C a r e f u l l y p l a c e p i t h b a l l i n t o i n d i c a t o r t u b e .
9.
Replace cap and tighten.
For Readiness
Reporting,
Equipment Is
Not Ready/
Available If:
P i t h b a l l is
missing or
damaged.
I n d i c a t or
tube is
cracked.
Scale change
o r i f i c e i s
cracked.
C a l i b r a t i o n
o r i f i c e is
cracked.
Q
