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Digital Clock
Serials 1268 through 1337; The airplane is equipped with a 2¼”
Davtron M803 digital clock located on the left instrument panel
immediately outboard of the airspeed indicator. The clock provides
Universal Time (UT), Local Time (LT), Elapsed Time (ET), Outside Air
Temperature (OAT) in C or F, and Voltmeter functions. All features
and functions are selectable from control buttons on the clock face.
The clock receives the OAT signal from a temperature sensor installed
immediately forward of the pilots door. The clock operates on 28 VDC
supplied through the 5-amp ENGINE INST circuit breaker on Main Bus
1. Keep-alive power is supplied through a 5-amp fuse connected to the
airplane Main Distribution Bus in the Master Control Unit (MCU). A
replaceable AA battery is installed to provide up to three years battery
back up.
SEL and CTL Buttons
All time keeping and set functions are addressable using the Select
and Control buttons below the time display. Upon power up the clock
will display Universal Time (UT). Pressing the Select button 3 times
will display Local Time (LT), and Elapsed Time (ET) sequentially.
Pressing the button again will return the display to UT.
Set UT or LT:
Use the Select button to select UT or LT as desired. Simultaneously
press Select and Control buttons (tens of hours LED will flash). Press
Control button repeatedly as required to increment digit to desired
value. Press Select button to select the next digit to be set. After all
digits have been set, press the Select button again to return to the
normal mode.
March 2010
7-102 Information Manual
Section 7 Cirrus Design
Airplane Description SR20
Flight Time (FT):
The flight time (FT) option is not available in this installation. If FT is
selected the display will ‘zero.’
Elapsed Time (ET):
The ET mode may be used either in ‘count-up’ or in ‘count-down’
modes.
To set the count-up mode:
1. Select ET using the Select button; and
2. Press Control to activate count-up timer. Elapsed time counts up
to 59 minutes, 59 seconds, and then switches to hours and
minutes. Pressing the Control button again will reset the timer to
zero.
To set the count-down mode:
1. Select ET using the Select button;
2. Input a ‘count-down’ time using the same technique as setting UT
or LT (a maximum of 59 minutes, 59 seconds may be entered);
3. Press the Select button to exit the set mode; and
4. Press Control to start the count down. At zero, the alarm activates
and the display flashes. Pressing either Select or Control
deactivates the alarm.
Test Mode:
To enter the self-test mode, hold the Select button for 3 seconds. The
display will indicate “88:88” and all four (UT, LT, FT, ET) annunciators
will come on.
OAT – VOLTS Button
Serials 1268 through 1337; The red OAT-VOLTS button is used to
display Outside Air Temperature and airplane Main Bus voltage. When
the airplane is powered down, the upper display will display the clock’s
back-up battery voltage. Upon power up, the display will show the
airplane’s Main Bus voltage. Pressing the button displays OAT in F.
Pressing the button again displays OAT in C.
Serials 1337 and subsequent with Avionics Configuration PFD;
Outside Air Temperature annunciation is integrated into the MFD or
PFD.
March 2010
Information Manual 7-103
Cirrus Design Section 7
SR20 Airplane Description
Cirrus Airplane Parachute System
The SR20 is equipped with a Cirrus Airplane Parachute System
(CAPS) designed to bring the aircraft and its occupants to the ground
in the event of a life-threatening emergency. The system is intended to
saves the lives of the occupants but will most likely destroy the aircraft
and may, in adverse circumstances, cause serious injury or death to
the occupants. Because of this it is important to carefully read the
CAPS descriptions in this section, section 3 Emergency Procedures
and Section 10, Safety and consider when and how you would use the
system.
• WARNING •
The parachute system does not require electrical power for
activation and can be activated at any time. The solidpropellant
rocket flight path is upward from the parachute
cover. Stay clear of parachute canister area when aircraft is
occupied. Do not allow children in the aircraft unattended.
System Description
The CAPS consists of a parachute, a solid-propellant rocket to deploy
the parachute, a rocket activation handle, and a harness imbedded
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西锐20飞机信息手册CIRRUS DESIGN SR20 AIRPLANE INFORMATION MA(86)
