Cirrus SR22 Pilot Operating Handbook page 282

Section 7
Airplane Description
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
OAT indication is subject to small errors. It is possible for ice to
accrete on the aircraft at indicated temperatures higher than
32°F (0° C).
Serials 0002 through 0434; 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 0435 and subsequent with PFD: Outside Air Temperature
annunciation is integrated into the PFD.
7-108
• Note •
Cirrus Design
SR22
P/N 13772-001
Revision A10