Piper ARCHER III Pilot Operating Handbook page 236

SECTION 9
SUPPLEMENT 5
NAV RECEIVER (CONT'D)
Another push of the mode button will cause the unit to go into the TIMER
mode. See Figure 3-9. When the unit is turned on the elapsed timer begins
counting upwards from zero. The timer can be stopped and reset to zero by
pushing the NAV frequency transfer button for 2 seconds or more causing the
ET on the display to flash. In this state the timer can be set as a countdown
timer or the elapsed timer can be restarted. The countdown timer is set by
using the NAV inc/dec knobs to set the desired time and then pushing the NAV
frequency transfer button to start the timer. The outer knob selects minutes, the
inner knob in the "in ~ position selects ten second intervals, and the inner knob
in the ~out" position selects individual seconds. After the countdown timer
reaches zero, the counter will begin to count upwards indefinitely while
flashing for the first 15 seconds. The elapsed timer can also be reset to zero
and started again after it has been stopped and reset to zero by pushing the
NAV frequency transfer button.
The NAV ACTIVE and STANDBY frequencies are stored in the memory on
power down and return on power up.
When the smaller increment/decrement knob is pushed in, depressing the NAV
TRANSFER button will interchange the ACTIVE and STANDBY frequencies.
The NAV IDENT knob is active in the pulled out position so that both voice
and ident can be heard. When this knob is pushed in, the ident tone is
attenuated. The volume of voice/ident can be adjusted by turning this knob.
REPORT: VB-1611
9-36
FIGURE 3-9 TIMER MODE
PA-28-181, ARCHER III
ISSUED: JULY 12, 1995
REVISED: APRIL 3, 1997