ProLaser III Operator's Manual
Page
23
Use the blue arrow switch to make the selection and
press ENTER. The main menu will reappear
Stopwatch (STPW) Feature
The stopwatch feature allows the user to calculate
average speed based on the elapsed time taken by a
vehicle to travel a predetermined distance. Details of the
Stopwatch Mode are described beginning on P. 29.
Differential Distance Test (DIF-TEST)
The differential distance test feature is used as a
calibration check to insure the unit is accurately
calculating target speeds based on range differences.
Details of this test are found in the “Accuracy Testing”
section, next.
NOTE: Metric units are not equipped
with this feature.
ACCURACY TESTS
Press the PWR switch on the back panel and allow the
instrument to complete the self–test sequence. Although
the internal test performs a complete check of the
ProLaser III's range and speed processing circuitry, you
may occasionally want to test the instrument against an
external standard.
First, check the alignment of the HUD aiming reticle.
Select an isolated target about 100 or more feet (30
meters) away, such as a stop sign, utility pole or overhead
power wire. Slowly sweep the ProLaser III across the
target and observe that the proper range is displayed only
when the target is within the reticle area, indicating lateral
alignment. (Listening to the audio “chirp” indicating
reflection of laser pulses is helpful when using overhead
wires.) Rotate the ProLaser III so that it is at right angles
to its normal operating position, (positioned on its side)
and repeat the process to verify vertical alignment.