How to Calibrate a Vascar Plus
The Visually Assisted Computer and Recorder (VASCAR) Plus is a vehicle mounted computer utilized to identify the speed of moving vehicles and must be calibrated properly to ensure accuracy. It is used primarily by law enforcement, and can be installed into cars, motorcycles and aircraft.
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Things You'll Need
- Vehicle mounted VASCAR Plus apparatus
- Predetermined quarter-mile stretch of road
Instructions
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Calibration of VASCAR Plus to Patrol Vehicles
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1
Select a quarter-mile segment of roadway that is flat, straight and has minimal traffic for use as a calibration course. Utilize a Department of Transportation, pre-measured course if no public roadway is readily available.
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2
Turn the VASCAR Plus power switch "Off" and set the thumb wheel switch to all zeros. Turn the power switch "On" and confirm that the display shows all eights. Set the thumb wheel switch to 02500, immediately prior to beginning the calibration course.
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3
Drive the course with the black distance switch in the "ON" position at the start and in the "OFF" position at the end. Note the calibration number on display after the distance switch has been turned off.
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4
Enter the calibration number on the thumb wheel. Turn the power switch "Off" and then "On." Confirm that the display is showing all zeros. Press the "Store" button to store the calibration.
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Tips & Warnings
If the VASCAR Plus fails to calibrate, take it to authorized repair personnel to assure future accuracy.
At minimum, VASCAR Plus should be calibrated weekly, when new tires have been added to a vehicle, or if the device has been removed and re-installed.
VASCAR Plus should be used only after proper training and certification.
VASCAR Plus, VASCAR Plus I and VASCAR Plus II share calibration instructions but VASCAR Plus III differs.
References
- Photo Credit Jupiterimages/liquidlibrary/Getty Images
