Specifications

7-50 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Tachometer
Serials 1268 through 1581: A 2¼” tachometer is mounted on the right
instrument panel adjacent to the other engine instruments. The
tachometer pointer sweeps a scale marked from 0 to 3500 RPM in 100
RPM increments.
The electrically operated tachometer receives a speed signal from a
magnetic pickup on the right hand magneto. 28 VDC for instrument
operation is supplied through the 5-amp ENGINE INST circuit breaker
on Main Bus 1.
Serials 1582 and subsequent: Engine RPM is shown in the upper left-
most corner of the MFD as both a simulated tachometer and as text.
The simulated tachometer receives a speed signal from a magnetic
pickup on the right hand magneto via the DAU and sweeps a scale
marked from 0 to 3000 RPM in 50 RPM increments.
Engine RPM is also continuously displayed in the engine data block
located in the lower right corner of the PFD.
In the event engine speed exceeds 2710 RPM for five seconds, the
MFD will display “Check RPM” 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.
Exhaust Gas Temp / Cylinder Head Temp Gage/Bar Graphs
Serials 0002 through 1601, 1603 through 1643 and 1645 through
1662 without EMax Engine Monitoring: A 2¼” combination Exhaust
Gas Temperature (EGT) and Cylinder Head Temperature (CHT)
indicator is mounted in the right instrument panel. 28 VDC for
instrument operation is supplied through the 5-amp ENGINE INST
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
March 2010