Decatur Electronics G3 - Stopwatch Mode Distance and Accuracy

G3
™
User’s & Installation Manual
7/October/2020
36
Once you have an established measurement area, use the FRONT
ANTENNA BUTTON or the REAR ANTENNA BUTTON to increase or
decrease the distance of the measurement area in meters. The
LOCKED window will show the distance when adjusting but will
revert to displaying STW after a few seconds of no distance change.
When the correct distance is set, you can time motor vehicles as
they cross between the markers in your measurement area. Use the
LOCK button to start and stop the timer. The time will be counted
and displayed in the PATRTOL window. Each sequential number
represents a tenth of a second.
After you have started and stopped the timer, a calculated speed
will be displayed in the TARGET window. The speed shown will be in
km/h.
The accuracy of the stopwatch mode will be limited by the precision
in which the distance measurement was made and the precision in
which the timer start and stop was activated. In general, to increase
the accuracy of the measurement, use a longer measurement area.
Press the MODE button to exit the Stopwatch mode.
• IfMPHunitshavebeenselectedinthesetupmenu,the
distance units will be in yards and the speed shown will
be in MPH.