Cirrus SR22 Pilot Operating Handbook page 225

Cirrus Design Section 7
SR22 Airplane Description
tachometer. The indicator is internally lighted. 28 VDC for instrument
operation is supplied through the 5-amp ENGINE INST circuit breaker
on Main Bus #1.
The Fuel Flow pointer sweeps a scale marked from 0 to 30 Gal/Hr.
The electrically operated Fuel Flow indicator receives a fuel-flow rate
signal from a fuel-flow transducer on the right side of the engine in the
fuel line between the engine driven fuel pump and throttle body
metering valve.
The Manifold Pressure pointer sweeps a scale marked from 10 to 30
inches Hg in one-inch Hg increments. The electrically operated
manifold pressure indicator receives a pressure signal from a pressure
sensor mounted in the induction airstream on the left side of the
induction air manifold near the throttle body.
Serials 1602, 1644, 1663 and subsequent: Manifold pressure is shown
in the upper left corner of the MFD as both a simulated temperature
gage and as text.
The simulated gage receives a pressure signal from a pressure sensor
mounted in the induction air manifold near the throttle body via the
DAU and sweeps a scale marked from 10 to 30 inches Hg in one-inch
Hg increments.
Manifold pressure is also continuously displayed in the engine data
block located in the lower right corner of the PFD.
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus.
Percent Power Gage
Serials 1602, 1644, 1663 and subsequent: Percent power is shown in
the upper middle section of the MFD as both a simulated gage and as
text.
The simulated gage displays calculated percent of maximum engine
power produced by the engine based on an algorithm employing
manifold pressure, indicated air speed, outside air temperature,
pressure altitude, engine speed and fuel flow. The percent power gage
sweeps a scale marked from 0 to 100 percent in 5 percent increments.
Percent power is also continuously displayed in the upper left area of
the PFD in vertical tape format and as text immediately above.
P/N 13772-001 7-51
Revision A5