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Summary of Contents for LTI 20/20 TruSpeed
- Page 1 User’s Manual...
- Page 2 LTI 20/20 TruSpeed User’s Manual Part Number 0144805 Copyright Notice: Information in this document is subject to change without notice and does not represent a commitment on the part of Laser Technology Inc. No part of this manual may be reproduced in any form or by any means, electronic or mechanical, including photocopying, recording, or information storage and retrieval systems, for any purpose other than the purchaser’s personal use, without the express written...
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Page 3: Table Of Contents
LTI 20/20 TruSpeed User’s Manual Table of Contents Page 1 LTI 20/20 TruSpeed User’s Manual Table of Contents Section #1 - Getting Started ....... . . - Page 4 Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 2 Section #2 - Speed Measurements ......
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Page 5: Section #1 - Getting Started
Section #1 - Getting Started Page 3 Section #1 - Getting Started Unpacking Your TruSpeed When you receive your TruSpeed, check to make sure that you have received everything that you ordered, and that it all arrived undamaged. TruSpeed Basic Package TruSpeed instrument with polarizing filter Two C cell batteries User's manual... -
Page 6: About The Truspeed
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 4 About the TruSpeed Laser Technology's LTI 20/20 TruSpeed is part of the Laser Technology family of handheld laser speed and ranging devices. Compared to our other laser speed measurement products, the TruSpeed includes: •... -
Page 7: Sensors
Section #1 - Getting Started Page 5 Sensors The TruSpeed has two lenses on the front panel. The top lens transmits the infrared laser signals. The bottom lens receives signals back from the target and feeds signal information to the internal circuitry. The internal circuitry consists of a laser range sensor and timing, analysis, computation, and display circuits. -
Page 8: Buttons On The Keypad
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 6 Buttons on the Keypad The TruSpeed has a 7-button keypad located on the rear panel of the instrument. The buttons provide easy access to the instrument functions. The table below lists the buttons and the functions of each. -
Page 9: Optional Shoulder Stock
Section #1 - Getting Started Page 7 Optional Shoulder Stock The Shoulder Stock is available for purchase as an accessory item. The Shoulder Stock helps stabilize the TruSpeed while capturing speed measurements and is designed for either left-handed or right-handed use. Attaching the Shoulder Stock Flip the Shoulder Stock Release toward the front of the TruSpeed. -
Page 10: Installing / Removing The Batteries
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 8 Installing / Removing the Batteries Two C cell batteries are required to power the TruSpeed. The batteries are located in the Battery Tube inside the Handle. Removing the Battery Tube from the Handle... -
Page 11: Battery Voltage Level
Section #1 - Getting Started Page 9 Battery Voltage Level The TruSpeed continuously monitors its power source. LTI has defined an acceptable battery voltage range to ensure that the instrument has sufficient battery voltage to guarantee correct operation. Appearance of the... -
Page 12: Powering On The Truspeed
Press the button to once again power ON the TruSpeed and repeat the Self Test. If the error repeats and you need assistance, contact LTI. See the inside front cover for LTI contact information. Powering OFF the TruSpeed Press and hold the button for approximately 3 seconds. -
Page 13: Understanding The Display Indicators
Section #1 - Getting Started Page 11 Understanding the Display Indicators Figure #9 shows the LCD Screen.The table below lists the display indicators and the function of each. These are presented in order of location on the screen, from left to right starting in the upper left corner. -
Page 14: Miscellaneous Display Features
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 12 Miscellaneous Display Features The table below lists the miscellaneous display features. Display Refer to Feature Explanation Pages bAtt You must replace the batteries. Appears in CHAng the upper and lower displays. -
Page 15: Adjusting The Aiming Reticle's Intensity
Section #1 - Getting Started Page 13 Adjusting the Aiming Reticle's Intensity The in-scope aiming reticle has eight intensity settings from DIM (01) to BRIGHT (08). Press the button. The display should look similar to Figure #10. The factory default setting is "br 05"... -
Page 16: Listening To The Truspeed
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 14 Listening to the TruSpeed The TruSpeed emits a variety of beeps and tones during use. The sounds vary and depend on what the instrument is doing. The table below lists and explains each of the sounds. -
Page 17: Error Codes
LTI. E 60 Memory failure. Please turn OFF unit and try again. If the same error is continuously repeated, please contact LTI. E 62 Receiver Failure. Please turn OFF unit and try again. If the same error is continuously repeated, please contact LTI. -
Page 18: Section #2 - Speed Measurements
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 16 Section #2 - Speed Measurements When you power ON the TruSpeed the instrument will perform the Self Test. Figure #12 shows successful completion of the Self Test. See page 30 for more information about the Self Test. -
Page 19: Taking A Sample Measurement
Section #2 - Speed Measurements Page 17 Taking a Sample Measurement Ensure that the TruSpeed is powered ON and that the Speed Mode is active. Use the sighting scope and aiming reticle to aim the instrument to a convenient target - an interior wall will do. To fire the laser: Press and hold the TRIGGER. -
Page 20: Line Of Sight
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 18 Line of Sight Ideally, you should have a clear line of sight to the target vehicle. If there is a momentary break in the beam, • the instrument will accumulate data and may be able to capture the target vehicle's speed. - Page 21 Section #2 - Speed Measurements Page 19 The cosine effect decreases as the range to the target vehicle increases. • At the maximum range of the instrument, the vehicle is so far away that the angle between it and the instrument is very small indeed. The instrument's perception of the target's speed is identical to its true speed.
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Page 22: Measuring A Moving Vehicle
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 20 Measuring a Moving Vehicle Ensure that the TruSpeed is powered ON and that the Speed Mode is active. Use the aiming reticle to aim the instrument at the target vehicle's license plate area and press the TRIGGER. -
Page 23: Using The Weather Mode
Section #2 - Speed Measurements Page 21 Using the Weather Mode Moisture is reflective. Weather such as rain, snow, or fog can make it difficult for the laser to receive signals back from the target. This is especially true when you are trying to capture speeds at close range. -
Page 24: Using The Continuous Mode
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 22 After you release the TRIGGER the instrument will display the most recent speed reading and the distance at which it was captured or an error code. When the most recent speed reading is displayed, the display screen will look similar to Figure #17. -
Page 25: Laser Jammer Detection
Figure #19. Figure #19 Laser Jammer Detection The LTI 20/20 TruSpeed contains advanced circuitry and algorithms that allow the instrument to determine if a laser jammer is being used. The JAM tone (page 14) indicates that the instrument is being flooded by a light source. There are two possible situations: •... -
Page 26: Section #3 - Test Mode And Instrument Tests
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 24 Section #3 - Test Mode and Instrument Tests The Test Mode includes 6 options and allows you to verify the TruSpeed's mechanics. These options include: • Display Integrity Test •... -
Page 27: Scope Alignment Test
If the frequency drops off at equal distances from the center of the aiming reticle, the instrument needs no adjustment. Otherwise, contact Laser Technology, Inc. for assistance with re-aligning the scope. See the inside front cover for LTI contact information. When checking vertical alignment to a close target, be aware of the offset between the center of the scope and the center of the transmit lens, which is 2 inches. -
Page 28: Instrument Confidence Checks
For these reasons, LTI has designed the Fixed Distance Test and the Delta Distance Test. LTI suggests that you do one of these tests each time the instrument is taken on duty. -
Page 29: Fixed Distance Test
The Fixed Distance Test requires one target: • LTI recommends that the target should be 175 feet from the shooting mark. See Figure #22. If there is not enough space available, that specific distance is not crucial. However, the distance between the target and the shooting mark must be a multiple of 1 foot, not a fraction of a foot. -
Page 30: Delta Distance Test
Page 28 Delta Distance Test The Delta Distance Test requires two targets. LTI recommends that the first target should be 150 feet from the shooting mark, and the second should be 175 feet from the mark. See Figure #23. If there is not enough space available, that specific distance is not crucial. - Page 31 If the difference is 25 feet, the displayed simulated speed should be 49, 50, or 51 MPH, and the distance should be 24.5, 25.0, or 25.5 feet. If you need assistance, contact Laser Technology, Inc. See the inside front cover for LTI contact information.
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Page 32: Self Test
Press the Button to once again power ON the TruSpeed and repeat the Self Test. Contact LTI if the error repeats and you need assistance. See the inside front cover for LTI contact information. Model and Firmware Version Number Display... -
Page 33: Section #4 - Maintenance
Section #4 - Maintenance Page 31 Section #4 - Maintenance Operating Temperature The instrument is rated for a temperature range of -22° F to +140° F. Do not operate the instrument in temperatures outside that range. Moisture and Dust Protection The TruSpeed is sealed to provide protection from normally encountered field conditions. -
Page 34: Section #5 - Specifications
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 32 Section #5 - Specifications Weight: 2.75 lb. (with batteries) Size: 7.75 x 3 x 11.75 in. Acquisition Time: 0.33 sec Speed Accuracy: ±1 mph Minimum Range: Speed Mode: 50 feet... -
Page 35: Section #6 - Troubleshooting Tips
Section #6 - Troubleshooting Tips Page 33 Section #6 - Troubleshooting Tips What You Will See Required Action Unit powers OFF by • Verify that the batteries are installed correctly. itself. • Replace the batteries. -or- • Keep in mind that the instrument automatically No power at all. -
Page 36: Section #7 - Glossary
Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 34 Section #7 - Glossary beam divergence: The tendency of a laser beam to expand in diameter as it moves away from the source, measured in milliradians (mrad). Continuous Mode: Alternate speed measurement mode. Allows you to take several successive readings of a target vehicle. -
Page 37: Index
Index Page 35 Index -d1- 12, 29 -d2- 12, 29 dEF CLEAr 12, 13 accessories Delta Distance Test 28, 34 acquisition time Delta Distance Text adjustment ring results filter Display Backlight aiming reticle display indicator brightness display indicators not visible Display Integrity Test 24, 34 drop shock... - Page 38 Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 36 laser panels Laser Fire front and rear display indicator PASS laser jammer detection polarizing light filter laser wavelength positive value LCD Screen speed dispaly 4, 5 LCD screen power lenses...
- Page 39 Index Page 37 safety temperature range 3, 32 scope Test Mode caring for display indicator Scope Alignment Test Test Mode button SELF Test Port 4, 5 Self Test test tone serial number display tones shock protection Transmit Lens 4, 5, 34 Shoulder Stock TRIGGER Shoulder Stock Attachment Point...
- Page 40 Laser Technology, Inc. LTI 20/20 TruSpeed User’s Manual Page 38 NOTES:...
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Questions and answers
I would like to know if a police officer can take a reading for a wrong car. I was in the middle lane traveling with traffic. The police indicate I was doing 80 mph in a 55 mph. I had speed control set for 60 mph. Is it possible he had the wrong vehicle.