56-101-01178 Revision K
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D. Performance
WARNING:
The 1811NG is
NOT
suitable for
RVSM
Accuracy requirements.
Aeronautical
Ps Channel
Altitude
ALT
Rate of
Climb
ROC
Pt Channel
Calibrated
Airspeed
CAS
Rate of
CAS
RtCAS
Mach
Units
Feet
ft/min
knots (kts)
kts/min
-
Operating
Range
-1,800 to 55,000
0 to 20,000
0 to 6,000
(*1)
0 to 650
50 to 600
(*2)
0 to 2.8
Accuracy
0.02% FS
(*3)
± 7 ft @ 0 ft
± 14 ft @ 20,000 ft
± 20 ft @ 30,000 ft
± 30 ft @ 40,000 ft
± 48 ft @ 50,000 ft
± 2 % of
value
0.05% FS
(*5)
± 1.0 kts @ 20 kts
± 0.5 kts @ 50 kts
± 0.3 kts @ 100 kts
± 0.2 kts @ 200 kts
± 0.2 kts @ 400 kts
± 0.2 kts @ 650 kts
± 2 % of
value
Better than
± 0.005
MACH
> 0.1
Repeatability
0.006% FS
± 2 ft @ 0 ft
± 5 ft @ 30,000 ft
± 15 ft @ 50,000 ft
-
± 0.5 kts @ 20 kts
± 0.2 kts @ 50 kts
± 0.1 kts @ 650 kts
-
0.001
rising to
0.005
Resolution
1
1
0.1
1
0.001
Stability
(12 month)
(*4)
0.025% FS
-
0.025% FS
-
-
Table 4
Aeronautical Specifications
Note (*1):
ROC (with 125 cu.in volume).
Note
(*2):
RtCAS (with 75 cu.in volume) Default is
300 kts/min
operating in Aeronautical
mode.
Note
(*3):
Specification based on typical (0.02% FS) accuracy. Maximum error is 0.04% FS.
Note
(*4):
This tolerance represents the stability over a 12-month period. If tighter
tolerances are required, the calibration interval should be reduced or establish
proof of stability.
Note
(*5):
Specification based on typical (0.05% FS) accuracy. Maximum error is 0.1% FS.