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Page Title:
Static Pressure Path Flow Test. |
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 TM 9-1270-219-13&P
e. Static Pressure Path Flow Test.
reapply a pressure of 255 - 265 kn
(3.2 - 3.5 in. Hg) and isolate the
(1)
Close
the
tank
shut-off
valve
and
supply.
reapply a pressure of 255 - 265 kn
(3.2 - 3.5 in. Hg) and isolate the
Open the tank shut-off valve.
(2)
supply.
When the pressure falls to 250 kn
(2) Open the tank shut-off valve.
(3)
(3.1 in. Hg) remove the blank assembly
(3) When the pressure falls to 250 kn (3.1
f r o m the pitot head adapter and start
in.
Hg)
remove
the
blank
assembly
the
stopwatch.
Check
that
after
80
f r o m the pitot head adapter and start
seconds the pressure is less than 50 kn
the
stopwatch.
Check
that
after
45
(0.12 in. Hg).
seconds the pressure is less than 50 kn
Open the tank vent valve to return
(0.12 in. Hg).
(4)
the applied pressure to ambient and
(4) Open the tank vent valve.
disconnect
the
pressure
equipment.
Pressure Leak Test.
f. Pitot
Release and remove the pitot head
(5)
adapter
from
the
pitot
head
and
Disconnect the pressure tube from the
(1)
r e m o v e the adapters from the P T a n d
P Sconnector
of
the
AADS
and
P S connectors
on
the
AADS
body.
c o n n e c t t o t h e PT c o n n e c t o r
of
the
A A D S . Connect the blank assembly to
h. Temperature Sensor Resistance Test.
the pitot head adapter as shown in
(1) Reconnect the interconnection harness
t o the AADS as shown in figure 5-2.
(2)
Close
the
tank
shut-off
and
tank
Select TEMP on S16 and with the
vent
valves
and
reapply
a
pressure
(2)
of
255
-
265
kn
(3.2
-
3.5
in.
Hg)
Digital Voltmeter (DVM) set to ohms
measure
the
resistance
between
test
and isolate the supply.
points 15 (+ve) and 16 on the Test
Set.
The
resistance
displayed
shalI
(3) Open the tank shut-off valve.
be within the limits of Table 5-2 at
(4) Start the stopwatch when the pressure
the
appropriate
ambient
temperature
falls to 250 kn (3.1 in. Hg) and check
indicated
by
the
thermometer
located
in the tester, pitot static systems.
that after 180 seconds the pressure is
more
than
175
kn
(1.49
in.
Hg).
(3)
Disconnect
the
interconnection
Pitot Pressure Path Flow Test.
harness and remove the AADS from
g.
the fixture by removing the three bolts
while supporting the AADS.
(1)
Close
the
tank
shut-off
valve
and
Ambient Temperature degrees F
Tolerance (ohms)
Nominal Resistance (ohms)
15
475
26
35
15
486
45
36
15
496
46
55
15
56
65
506
15
66
517
75
15
527
76
85
15
86
95
538
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