Installation manual

IM2803MG.DOC., DIR. 912802 IM2803 Shadin Avionics
INSTALLATION MANUAL
D
IGIDATA
Rev: M
P/N 912802-A, 912802-03A, 912802-03A-G
Page: 2-3
2.6 Limitations
2.6.1 Warm-up time
The DigiData requires a warm-up time that varies with ambient temperature:
70°C ambient 5 minutes warm-up required
15°C ambient 10 minutes warm-up required
-20°C ambient 15 minutes warm-up required
-40°C ambient 20 minutes warm-up required
If the DigiData has been configured for a fuel flow delay, fuel flow and thus fuel used information
shall be unavailable at startup for the duration of the selected delay.
2.6.2 Supplemental Equipment
All Shadin F/ADC(s) and ADC(s) (including the DigiData) are not designed to replace factory
installed airdata fuel flow systems or other gauges. They are not intended to be used as a primary
system to drive altimeters or airspeed indicators. The F/ADC fuel section is not a fuel quantity
system and therefore reports only what was manually entered by the operator.
2.6.3 Static Source Error Correction (SSEC),
Pitot Source Error Correction (PSEC)
For certain models of aircraft, the Fuel/Airdata System will make corrections to pressure altitude
by compensating for static source error. For some of these models, the Fuel/Airdata System will
make corrections to indicated airspeed by compensating for pitot source error.
The System does not provide true and absolute readings for all circumstances. It makes no
altitude corrections when the uncorrected IAS is below 100 knots, and it makes no airspeed
corrections when the uncorrected IAS is below 150 knots. It does not account for other factors,
such as the current useful weight, that contribute to static source error and pitot source error.
Rather, the Fuel/Airdata System performs calculations based solely on indicated airspeed and
pressure altitude. The SSEC / PSEC corrections were derived from specific aircraft data referred
to in section 2.6.4. To configure the Shadin DigiData for a specific aircraft model refer to section
9.