DELTA LTL3000 Handheld Retroreflectometer for Road Markings User Guide
- June 6, 2024
- Delta
Table of Contents
DELTA LTL3000 Handheld Retroreflectometer for Road Markings
Getting started
- Insert battery: Before using the LTL3000 instrument make sure that the battery is charged and inserted in the battery slot on the side of the instrument.
- Turn on: P ress the green button on the handle of the LTL3000 instrument. After 10-15 seconds, the system has booted, and the instrument is ready for use.
- Stand-by: The LTL3000 automatically switches to stand-by mode if the instrument has not been used for a specific amount of time. From stand-by mode the instrument is instantly ready when pressing the green button on the handle.
- Switch off: press the X-button on the handle of the LTL3000 and then press ‘Shutdown’ in the menu on the touch screen, and the instrument will switch off. Note: If not properly switched off, the instrument will continue to consume battery in standby mode.
Calibration procedure
Before a calibration is carried out make sure that the calibration unit is clean and undamaged.
Reference RL calibration (recommended daily)
To calibrate the LTL3000 use the RL calibration target delivered with the
instrument.
Calibrate the RL value by following these steps:
- Select ‘Calibrate’ from the main menu.
- Type in the RL-calibration value printed on the calibration target sticker.
- Place the calibration target under the LTL3000 (in the front) and press ‘Calibrate RL’ on the screen. Note: the pins on the calibration target fit into the slots underneath the LTL3000 instrument.
- Wait for success confirmation and remove the calibration unit
Reference Qd calibration (when needed):
The instrument is factory calibrated for the Qd value and thus Qd should only
be recalibrated when needed.
The calibration can be verified by performing a Qd measurement on the Qd
calibration marking delivered with the instrument. If the reading is within a
few percent recalibration is not required. Qd calibration requires the Qd
calibration marking. The instrument will warn about this fact before
calibration. Note: Be aware that it is NOT possible to recover
the factory calibration if the Qd value is recalibrated.
To calibrate the Qd value follow these steps:
- Select ‘Calibrate’ from the main menu.
- Type in the Qd calibration value printed on the calibration target sticker.
- Place the LTL3000 all the way back on the Qd calibration target facing in the direction indicated.
- Press ‘Calibrate Qd’ on the screen.
- Wait for success confirmation.
Perform a measurement
Select ‘Measure’ from the main menu, and the instrument is now ready to
perform a measurement.
Place the LTL3000 instrument on top of the specific road markings you want to
measure and press the green button on the instrument handle. NOTE. Make sure
that the instrument is positioned correctly on the road marking. The two wear
plates in front of the instrument and the end of the instrument should be on
the mark when measuring.
Wait a second until the reading is shown on the display. The measurement data
is automatically saved by the LTL3000 instrument. You can now continue to
conduct another measurement.
If you want to switch to another measurement series, choose the relevant series from the drop-down menu select it in the Series menu and continue with your measurements.
View all your mesaurements in the Log. 
Main Menu
The various instrument actions can be accessed via the main menu on the
display screen.
You can activate the main menu in 3 ways:
- press at the top left corner of the display screen to access the main menu,
- or swipe the screen from the left side,
- or press X on the instrument handle.
If you want to close the menu again, just touch the display or press X on the instrument handle. The main menu consists of these elements:
Icons
The icons in the status bar at the top of the display screen give you
information about the instrument status and operational
mode: