56-101-01175 Revision H Page | 17
Note (*6): This tolerance represents the stability over a 12 month period. If tighter tolerances
are required, the calibration interval should be reduced or proof of accuracy/stability
should be established.
Note (*7): Pt max = Ps max + Qc max = 38.0 + 40.0 = 78 inHg
Note: Accuracy specifications are based on performing the 12 month Recertification cycle
when connected to a leak tight system.
Specifications are subject to change without notice.
D. Display Units
n/a (dimensionless ratio)
inHg, mbar, psia, psid, kPa, mmHg, inH
2
O@4°C, inH
2
O@20°C,
inH
2
O@60°F
ratio (Pt/Ps), inHg, mbar, psia, psid, kPa, mmHg, inH
2
O@4°C,
inH
2
O@20°C, inH
2
O@60°F
Table 5 Display Units
E. Pressure Media
Two internal high reliability electric pumps generate the required pressure and vacuum.
The 4-head vacuum pump is configured to provide each channel (Ps & Pt) with its own
dedicated 2-headed vacuum source. The pressure pump is a single head unit and
supplies both channels (Ps & Pt) with a common pressure supply.
F. Transducers
The Ps channel uses an absolute pressure transducer while the Pt channel uses a
differential pressure transducer.
G. Input Power
Electronic switcher power supply module with auto input voltage detection circuitry for an
A/C input voltage of 100-120/200-240VAC @ 50-60Hz.
H. Fuse Protection
Fuse overload protection is provided by a Miniature Fuse, 5 x 20 mm, Time-Lag T, L, 250
VAC, 4A is installed on the fuse compartment of the power entry module.
Note: For 200-240 VAC Operation, 5x20 mm, Time-Lag T, L, 250 VAC @ 2A is
recommended.
3. INSTRUCTIONS FOR USE
A. With the Barfield DPS1000 Pitot and Static ports connected via the hoses (included) and
mating aircraft adapters (not included) to their respective ports on the aircraft, the user is
able to enter pressures or equivalent aeronautical values using the Test Set’s touch
screen input display to drive the aircraft system to the required points of test.
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