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circuit breaker on Main Bus 1.
The EGT pointer sweeps a scale marked from 1250°F to 1650°F in
25°F increments. The EGT scale has no limit markings. The
electrically operated EGT indicator receives a temperature signal from
a thermocouple mounted in the exhaust stream of the #4 cylinder
exhaust pipe. The CHT pointer sweeps a scale marked from 200°F to
500°F. The electrically operated CHT indicator receives a temperature
Revision A5
P/N 13772-001 7-49
Cirrus Design Section 7
SR22 Airplane Description
signal from a temperature sensor mounted in the #6 cylinder head on
the left side of the engine.
Serials 1602, 1644, 1663 and subsequent: Exhaust Gas Temperature
(EGT) and Cylinder Head Temperature (CHT) readings are displayed
on the MFD as vertical bars that ascend and descend respective to
increasing and decreasing temperatures.
The EGT indicator receives a temperature signal via the DAU from a
sensor mounted in the exhaust stream of the #4 cylinder exhaust pipe.
The EGT bar and graph is marked from 1000°F to 1600°F in 100°F
increments. The EGT of the cylinder is displayed above the bar in text
and an up or down trend arrow appears below the temperature to
indicate whether EGT is rising or falling.
The CHT indicator receives a temperature signal via the DAU from a
sensor mounted in the #6 cylinder head. The CHT bar and graph is
marked from 100°F to 500°F in 100°F increments. The CHT of the
cylinder is displayed above the bar in text and an up or down trend
arrow appears below the temperature to indicate whether CHT is
rising or falling.
In the event CHT exceeds 420°F, the MFD will display “Check CHT” in
a yellow advisory box in the lower right corner of the MFD. In the event
CHT exceeds 460°F, the MFD will display “Check CHT” in a red
advisory box in the lower right corner of the MFD.
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus.
Oil Temperature / Oil Pressure Gage(s)
Serials 0002 through 1601, 1603 through 1643 and 1645 through
1662: A 2¼” combination Oil Temperature and Oil Pressure indicator
is mounted on the right instrument panel below the EGT/CHT
indicator. The instrument is internally lighted. 28 VDC for instrument
operation is supplied through the 5-amp ENGINE INST circuit breaker
on Main Bus 1.
The Oil Temperature pointer sweeps a scale marked from 50°F to
250°F in 25°F increments. The Oil Temperature indicator receives a
temperature signal from a temperature sending unit mounted at the
lower left side of the engine below the oil cooler.
Revision A7
7-50 P/N 13772-001
Section 7 Cirrus Design
Airplane Description SR22
The Oil Pressure pointer sweeps a scale marked from 0 psi to 100 psi.
The Oil Pressure indicator receives a pressure signal from an oil
pressure sensor mounted at the aft end of the engine below the oil
cooler. Normally, oil pressure may drop to 10 psi at idle but will be in
the 30 - 60 psi range at higher RPM.
Serials 1602, 1644, 1663 and subsequent: Oil temperature is shown in
the upper right corner of the MFD as both a simulated temperature
gage and as text. The simulated gage receives a temperature signal
from a sensor mounted below the oil cooler via the DAU and sweeps a
scale marked from 75°F to 250°F in 10°F increments.
In the event oil temperature reaches 235°F, the MFD will display
“Monitor Oil Temperature” in a red advisory box in the lower right
corner of the MFD.
In the event oil temperature exceeds 240°F, the MFD will display
“Check Oil Temp” in a red advisory box in the lower right corner of the
MFD.
Oil pressure is shown in the upper right-most corner of the MFD as
both a simulated pressure gage and as text. The simulated gage
receives a pressure signal from a sensor mounted below the oil cooler
via the DAU and sweeps a scale marked from 0 psi to 100 psi in 5 psi
increments.
Oil pressure is also continuously displayed in the engine data block
located in the lower right corner of the PFD.
In the event oil pressure falls below 10 psi or exceeds 99 psi, the MFD
will display “Check Oil Press” in a red advisory box in the lower right
corner of the MFD.
In the event oil pressure falls below 30 psi or exceeds 75 psi, the MFD
will display “Check Oil Press” in a yellow advisory box in the lower right
corner of the MFD.
28 VDC for the digital instrument operation is supplied through the 2-
amp ANNUN / ENGINE INST circuit breaker on the Essential Bus
　
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