RaceAmerica 3850B Timer AC4 Owner's Manual page 19

NOTE: All four timers also have a backup timer
internally maintained by the Timer AC4. These
free-running timers do not stop at the maximum
elapsed time, instead, the timers roll over back to
zero and continue to count. Care should be taken
if a long period of time elapses between when the
timer was stopped and restarted.
KEY 6
To manually stop the next timer, press the [6]
FINISH key. This is the same function as a car
crossing the finish line and blocking the beam.
This key is enabled when the Status Display
indicates [OFF].
KEY 8
To review the 'BEST' time or lap, press and
hold [8].
KEY 9
If a car does not complete the course and their
time is no longer valid, wait until their timer is the
next timer to stop. Pressing the [9] [DNF] key will
stop the next timer (same as the car crossing the
finish line) and update the timer with the maximum
elapsed time to indicate the car went Off Course
and the time is invalid. The maximum value can be
configured in [*4] CONFIG; 9:59.999 or 999.999
seconds dependent upon the Timer AC4 display
format ordered are the maximum times.
KEY 0
To review the last four run or lap numbers,
press and hold [0] RUN/LAP.
KEY #
Use the [#] ENTER key to accept input data
and navigate the CONFIG menu.
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KEY *1
Pressing *1 will print the current configuration
in he system to a connected serial printer. See
sample. Use *5 CONFIG to make changes.
KEY *2
The [*2] key is used to toggle hard-wired track
sensors [-on-] (enabled) and [OFF-] (disabled).
NOTE: If the T-Link Wireless unit is connected
and powered on, the [0] key is disabled.
NOTE: When the sensors are in either mode,
they will not detect any cars crossing the start or
finish line in the other mode.
Initial power-up mode is last saved.
KEY *4
Press [*4] to enter the CONFIG menu. See
separate Fig. 11 to see all the details of the system
configuration menu.
KEY *5
To enter alignment mode, for hard wired
sensors, press the [*5] keys on the keypad; sensor
alignment at the start and finish lines indicated by
[-SF-] displayed. The left dash is the start line and
the right dash is the finish line. The dashes will be
replaced by a number. The sensors are checked
continuously and the display is updated 4 times
a second. If the sensor is aligned, the number
will not change. If the sensor is intermittently
out of alignment or on the edge of alignment, the
corresponding number will count intermittently. If
the sensor is out of alignment, the corresponding
number will count 4 times a second.
KEY *6
Pressing [*6] on the keypad will cause
connected T-Link units to monitor the RF signal
integrity. The display will show [-rF-].
left dash is the start line and the right dash is the
RaceAmerica Model 3850 Timer AC4
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