G3
™
User’s & Installation Manual
7/October/2020
35
3.9 Stopwatch Operation Mode
Calculate target speeds without transmitting radar signals by using
the stopwatch mode. The stopwatch mode relies on the time/
distance formula to calculate target speeds by measuring the
amount of time a motor vehicle takes to travel a known distance.
Speed = Distance / Time
To place the radar into stopwatch mode, rst ensure that no antenna
is currently selected, then press and hold the OPTN button for two
seconds. The center “locked” window should display “STW” to indicate
you have activated the stopwatch function.
Figure 3.9
The Locked window will display "STW" whenever the G3™ is operating in the
Stopwatch Mode
The three numeric windows display time, distance, and speed.
TARGET WINDOW Calculated Speed in km/h
LOCKED WINDOW Distance in Meters
PATROL WINDOW Time in Tenths of Seconds
Example:
Distance Set to: 402 Meters
Time Measured: 150 (15 .0 Seconds)
Calculated Speed: 96 km/h
To make use of the stopwatch mode, you need a road surface
that is marked with known distance intervals, or you will need to
independently make a measurement between two visible points
on the road in which you can time motor vehicles passing between
those points (for example a bridge underpass and a road sign) with
some precise distance measuring equipment.
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