barfield DPS400, Инструкция по эксплуатации

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INSTRUCTION MANUAL
DPS400
56-101-01180-C 1-4
Page 28
November 5, 2003
(7) Allow the test set elapsed time to reach approximately 1.00 min or more. Record the
leak rate of the tester and hoses. Verify the test set must have a leak rate of 2
kts/min or less. If the leak rate is greater than 2 kts/min, remove the hoses from the
test set and repeat the Pitot Leak Test. Repeating this procedure isolates the Test
Set from the hoses. If the test set passes the test, the leak is located in the Pitot hose
or connector. To correct the problem, repair or replace the hoses or connectors. A
repeated failure of the test set shows that the leak is contained within the test set. In
this case, it is recommended that the test set be sent to the manufacturer for repair.
(8) Press
F4 to cancel the leak check at any time during the procedure. Press the F4
button to return to the parameter display screen.
(9)
When testing is complete, set the PITOT CONTROL for airspeed of 100 knots.
(10)
Record the tester/hose leak rate so it may be deducted from the aircraft leak rate.
(11)
Slowly open the LEAK TEST valve. Verify the airspeed increases or decreases to
approximately 100 knots. Close the LEAK TEST valve.
(12) Slowly open the PITOT VENT until the airspeed reaches 0 knots.
(13)
Configure the Tester as follows before removing power:
Leak Test Closed
Rate Control/Leak Test Closed
Pitot Vent Open
Static Vent Open
Pitot Control
≈
100 knots
Static Control
≈
Field Elevation
(14) If the DPS400 leak testing is complete, turn off power.
D. Applying Leak Correction
If the leak rate does not exceed 2 knots/min or 50 ft/min, record the leak rate of the test set
and hoses so the values can be subtracted from the leak test of aircraft. The calculated
value removes the leaks caused by the tester and hoses and isolates the leak rate of the
aircraft systems.