barfield 101-01180, Инструкция по эксплуатации

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INSTRUCTION MANUAL
DPS400
56-101-01180-C 1-4
Page 33
November 5, 2003
(2) Altitude Checks
(a) Verify that Tester Static Leak and the Aircraft Static System Leak check have
been completed. Set the front panel controls as follows:
Leak Test Closed
Rate Control/Leak Test Closed
Pitot Vent Open
Static Vent Open
Pitot Control
≈
100 knots
Static Control
≈
Field Elevation
Caution: Before pressurizing the aircraft Pitot and/or Static systems
insure Limit Protection is ENABLED and the Airspeed & Mach
limits are set to the appropriate values. Make sure that the
aircraft instrument limits are never exceeded.
(b) Close the STATIC and PITOT vents.
Caution: Do not use unnecessary force to adjust any test set valve.
Positive stop spacers have been installed on all needle valves to
permit firm closing of the valves without damage. However,
excessive force can overcome the knob set screw resulting in
valve damage. The same caution applies when using the
vernier knobs on the pressure regulator.
(c)
Slowly open the LEAK TEST valve. Verify the airspeed increases to
approximately 100 knots. (Set PITOT CONTROL to 100 knots).
(d)
When close to the 100 knot airspeed, open the LEAK TEST valve fully to allow
the differential regulator to maintain the airspeed at its present level
.
Note: Disregard the test set airspeed indications during these tests.
Note: The Pitot LEAK TEST valve is opened to equalize the test set
pressures and to protect the airspeed indicator from negative
airspeed conditions.
(e)
Set the STATIC CONTROL to the desired altitude. Do not exceed the altitude
or VSI programmed limits. Slowly open static RATE CONTROL/LEAK TEST
valve until desired altitude shows on the tester. Open the static RATE
CONTROL/LEAK TEST valve fully and adjust STATIC CONTROL as needed
to set the desired altitude.