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LTI 20/20 TruSpeed User Manual

LTI 20/20 TruSpeed
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Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual
Page 2
Section #2 - Speed Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Taking a Sample Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Choosing a Roadside Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Line of Sight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
The Cosine Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Measuring a Moving Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Using the Weather Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Using the Continuous Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Laser Jammer Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Section #3 - Test Mode and Instrument Tests . . . . . . . . . . . . . . . . . . 24
Display Integrity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Scope Alignment Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Instrument Confidence Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fixed Distance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Delta Distance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Model and Firmware Version Number Display . . . . . . . . . . . . . . . . . . . . 30
Serial Number Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Section #4 - Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Section #5 - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Section #6 - Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Section #7 - Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Questions and Answers:

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LTI 20/20 TruSpeed Specifications

General IconGeneral
TypeLaser Speed Gun
Speed Range0 to 200 mph (0 to 320 km/h)
Laser Wavelength905 nm
DisplayLCD
Operating Temperature-22°F to +140°F (-30°C to +60°C)
ManufacturerLaser Technology, Inc. (LTI)
Accuracy+/- 1 mph (+/- 2 km/h)
RangeUp to 2000 feet (610 meters)
Battery LifeApproximately 8 hours of continuous use
Measurement TimeLess than 0.5 seconds