MPH Sure Shot - Page 23

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23
Thelaneoffsetdistanceismeasuredbyfiringthelaseratthecenterofthelaneinwhichthevehicleswill
betraveling.Oncetheoffsetisinplace,youwillshoottheleadingvehicle(CAR1)andthenthe
followingvehicle(CAR2).Bothvehiclesmustbeon
onesideofthelaserwhencapturedsothe
directionsarethesame.
AseachtargetiscapturedtheresultswillappearintheHUDaswellasontheLCD.Ifthestopping
distance/timeisshorterthanthevalueenteredbyyouinthesetup,thelaserwilldisplaythat
the
stoppingdistanceisinviolationandwillemitaseriesofshorttonesasanalert.
Recommendations:
1. Ashortlaneoffsetandalargerdistancebetweenthelaserandthevehiclesaregoodrulesof
thumb.
2. Therecommendedminimumdistancetobothcarsisatleast2.5
timesthelaneoffset.Soifyou
areoffsetby15feet,theminimumreadingdistanceshouldbeatleast37feet,butyoushould
aimformoredistantshotsifpossible.
3. Thecarlengthvalueisrelativetothedirectionthevehiclesaretraveling.Forapproaching
vehicles,thecar
lengthvaluewillrepresentthelengthoftheleadingcar.Forrecedingvehicles,
thecarlengthwillrepresentthelengthofthefollowingcar.
4. Anyreadingswherethetimebetweenreadingsisover4secondswillbe invalidandthereading
willnotbeavailable.
7.1.2.5 StopwatchMenu
TheSTOPWATCHMENU
(Figure14)willtakeyouintothestopwatchfunctionofthelaser.Inthis
functionyouareabletomeasurethespeedofavehiclebypressingthefirebuttonwhenthevehicle
entersandagainwhenitexitsapredefineddistancemeasurement.Thisfunctionusestheelapsedtime
and
theknowndistancetocalculatethespeedofthevehicle.
NOTE:Thestopwatchfunctionalsoassumesaconstantspeedwasmaintainedbythevehicleoverthe 
lengthofthetransitionthroughtheknowndistance.
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Figure14‐StopwatchMenu