Cirrus DESIGN SR20 Information Manual page 241

Cirrus Design
SR20
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
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.
P/N 13999-002 Info Manual
September 2011
Section 7
Airplane Description
7-79