The Barfield DPS350 Air Data Tester is a
microprocessorbased unit using the latest in
transducer technology. The DPS350 operates
similar to Barfield's 1811 series testers but the
transducer technology used is virtually immune to
the costly repairs generally experienced by analog
instruments. Software containing a programmable
protection limit feature has been incorporated into
the DPS350 to insulate the aircraft instruments
from damage caused by negative airspeed and
over pressurization conditions. Limit protection
is provided by computer actuated solenoid valves
that safeguard aircraft altitude, airspeed, rate
of climb/decent and mach instruments. The high
accuracy and a stability (see Air Data Specifications
for details) exhibited by the transducers qualifies
the DPS350 for use on aircraft being certified for
Reduced Vertical Separation Minimum (RVSM)
operation and increases the calibration interval
from 30 days to once a year. The simple menu
driven digital display calculates and displays
Altitude, Vertical Speed, Airspeed, EPR and
other measurements in various units of measure,
including: Ft, M, Kts, Km/hr, Mach, Ft/min, M/min,
EPR (Pt/Ps), inHg, mb, and psia. The tester also
includes internal pumps that can produce a pressure
and vacuum suitable for simulating 55K Ft, 650
Knots, and 6000 Ft/min conditions in wide body
aircraft.
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