Specifications
7-28 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Altimeter
• Note •
Serials 1337 and subsequent: The standby altimeter is
mounted on the LH bolster panel.
Airplane altitude is depicted on a conventional, three-pointer, internally
lit barometric altimeter installed in the pilot's instrument panel. The
instrument senses the local barometric pressure adjusted for altimeter
setting and displays the result on the instrument in feet. The altimeter
is calibrated for operation between -1000 and 20,000 feet altitude. The
scale is marked from 0 to 10 in increments of 2. The long pointer
indicates hundreds of feet and sweeps the scale every 1000 feet (each
increment equals 20 feet). The short, wide pointer indicates thousands
of feet and sweeps the scale every 10,000 feet (each increment equals
200 feet). The short narrow pointer indicates tens of thousands feet
and sweeps from 0 (zero) to 2 (20,000 feet with each increment equal
to 2000 feet). Barometric windows on the instrument's face allow
barometric calibrations in either inches of mercury (in.Hg) or millibars
(mb). The barometric altimeter settings are input through the
barometric adjustment knob at the lower left of the instrument.
Turn Coordinator
• Note •
Serials 1337 and subsequent: Turn Coordinator function and
roll data display is integrated into the PFD.
Avionics Configuration 2.0 and 2.1:
The electric turn coordinator displays roll information and provides roll
data to the integral autopilot system (System 20 or System 30) Roll
rate is sensed by a single-gimbal, electric-powered gyro and displayed
on the face of the instrument. The display consists of a symbolic
airplane rotates to indicate turn rate and a standard glass tube and
ball inclinometer. Markings, labeled L & R, indicate roll for a standard
rate turn in the direction indicated. Redundant circuits paralleled
through diodes at the indicator supply DC electrical power. 28 VDC for
roll rate gyro operation is supplied through the 2-amp TURN COORD
1 circuit breaker on the Essential Bus and the 2-amp TURN COORD 2
circuit breaker on the Main Bus 2.
March 2010