Force Technology DELTA LTL3000 User manual

DELTA –a part of FORCE Technology
Venlighedsvej 4 - DK-2970 Hørsholm - Denmark - Tel. [phone] - [email protected]
LTL3000 and LTL3500 Retroreflectometer
User Manual
May 2021 –English language version

LTL3000 & LTL3500 User Manual / May 2021, version 2.0 2DELTA –a part of FORCE Technology
USA Statement
Note:
LTL3000 and LTL3500 have been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
•Consult the dealer or an experienced radio/TV technician for help.
Canada Statement
Note:
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a residen-
tial area is likely to cause harmful interference in which case the user will be required to correct the
interference at his/her own expense.

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Disclaimer
The information contained in this document is subject to change without notice.
DELTA MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICU-LAR PURPOSE. DELTA SHALL NOT BE LIABLE FOR ERRORS CONTAINED HEREIN OR FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING,
PERFORMANCE OR USE OF THIS MATERIAL.
LTL3000 AND LTL3500 ARE BUILT ON GENERAL PUBLIC LICENSE COMPONENTS. THE SOURCE
CODE IS AVAILABLE UPON REQUEST.
Intended use/purpose
LTL3000 and LTL3500 retroreflectometer are portable field instruments used for on-site inspection and
quality control of retroreflection properties of road markings.
Important Safety and Handling Information
Caution
Changes/modifications not approved by the responsible party could void the user’s authority to operate the
equipment.
Use the unit only in the way described in this manual. Failure to follow the guidelines and instructions in this
manual may be dangerous and illegal.
LTL3000 and LTL3500 may not be used with other batteries than those supplied with the product.
Disposal and Recycling Information
Please ask your appointed dealer concerning disposal of LTL3000/LTL3500 in your country.
Visit our website: http://roadsensors.madebydelta.com/

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Table of Contents
Introduction....................................................................................................................................... 11
Overview of LTL3000 and LTL3500.................................................................................................... 11
Extractable handle (only LTL3500) ..................................................................................................... 12
Getting started .................................................................................................................................. 14
Icons ................................................................................................................................................ 14
Main menu........................................................................................................................................ 16
Perform a measurement .................................................................................................................... 17
Working with series and templates...................................................................................................... 20
Templates (only LTL3500) ................................................................................................................. 20
Series............................................................................................................................................... 21
Users................................................................................................................................................ 24
Log................................................................................................................................................... 25
Calibration ........................................................................................................................................ 28
Settings ............................................................................................................................................ 32
Actions menu.................................................................................................................................... 36
GNSS (optional feature)..................................................................................................................... 41
Nighttime retroreflected color (x,y) (optional feature)............................................................................ 41
Sensors and cameras (only LTL3500)................................................................................................. 42
Wet Night Frame (optional feature)..................................................................................................... 43
Battery.............................................................................................................................................. 44
Battery charger.................................................................................................................................. 45
USB connection ................................................................................................................................ 46
Maintenance ..................................................................................................................................... 47
Appendix A: Specifications .................................................................................................................... 49
General characteristics ...................................................................................................................... 49
Electrical characteristics..................................................................................................................... 50
Environmental specifications.............................................................................................................. 50
Instrument dimensions....................................................................................................................... 50
Regulatory compliance ...................................................................................................................... 51
Appendix B: Safety symbols and model identification .............................................................................. 52
Appendix C: Delivery............................................................................................................................. 53

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Introduction
The LTL3000 and LTL3500 retroreflectometers are portable field instruments intended for measuring the
retroreflection and reflection properties of road markings. This manual covers both instruments. Throughout
the manual it is indicated in the text if a topic or feature applies to both instruments (‘LTL3000/LTL3500’) or
only applies to one of the instrument types (e.g. ‘LTL3500’).
What does the instrument measure?
LTL3000/LTL3500 measures the RL value (coefficient of retroreflected luminance at night / in darkness) and
the Qd value (day light visibility). RL is a measure of the road marking’s brightness as seen by drivers of
motorized vehicles with headlights turned on. For RL, the road is illuminated at an angle of 1.24°, whereas
the illumination for Qd (daylight) is diffuse.
The reflected light for both RL and Qd is measured at an angle of 2.29°, which corresponds to an observa-
tion distance of 30 meters - i.e. a motorist’s viewing situation under normal conditions. Further information
about measuring principles and standards can be found on https://roadsensors.com/.
LTL3000/LTL3500 measures:
•RL (nighttime visibility) of markings under dry and wet conditions. RL range: 0 to 4000 mcd·m-2·lx-1
•Qd (daytime visibility) of markings under dry and wet conditions. Qd range: 0 to 318 mcd·m-2·lx-1
•Nighttime chromaticity coordinates (x, y).
LTL3000/LTL3500 has automatic ambient light compensation. Thus, daylight and other outside light sources
will not affect the accuracy of the measurements.
Overview of LTL3000 and LTL3500
The LTL3000/LTL3500 retroreflectometer is easy to operate and requires a minimum of instructions.
The measurement results are presented on the instrument’s touch screen. Each measurement can be linked
to a user/operator name and a series name.
The instrument provides a warning message or sound in case of unreliable measurement.
The majority of action buttons on the instrument are accessible via the touch screen. The physical buttons
and features on the instrument are shown below.

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Front and side of the LTL3000/LTL3500:
The center of the measurement field length (190 mm / 7.6 inch) is marked with a black arrow on the body of
the instrument (see picture below). The width of the measurement field (50 mm / 2 inch) is centered.
The LTL3000/LTL3500 is equipped with a USB port on the side of the instrument for data export via a
memory stick.
The instrument is powered by a rechargeable battery, offering many hours of measurement capacity. A
mains powered battery charger is supplied with the instrument as standard delivery.
Extractable handle (only LTL3500)
The LTL3500 is featured with an extractable handle enabling the user to operate the instrument and view the
instrument display from an upright working position.
The handle can be adjusted in various lengths (high/low) by pushing the black trigger on the handle.

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For easy transportation when the instrument is not in use, the extractable handle can be folded down. Pull
the black trigger unfold the handle again.

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Getting started
Insert battery: before using the LTL3000/LTL3500 instrument make sure that the battery is charged and
inserted in the battery slot on the side of the instrument.
Turn on: press the green button on the handle of the instrument. After 10-15 seconds, the system has
booted, and the instrument is ready for use.
Stand-by: the instrument 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.
Calibrate: to ensure high quality of data we recommend that you perform an RL calibration of the instrument
every day the instrument is in use, typically in the morning before commencing the measurements (see how
in the section named ‘Calibration’ in this manual).
The Qd (optional feature) measurement system is factory calibrated and calibration can be done
occasionally.
Switch off: press the X-button on the handle of the instrument and then press ‘Shutdown’ in the menu on the
touch screen, and the instrument will switch off. Note: The instrument automatically turns off when it has not
been used for an extended amount of time.
Icons
The icons in the status bar at the top of the display screen give you information about the instrument status
and operational mode:
Icon explanation:
It is time for service on your instrument. Please contact your
local distributor
Warning signal for your current measurement
USB drive is connected and accepted
Printer is connected and accepted

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Wet timer is active (only LTL3500)
The current time (hour/min)
Compass heading (optional feature - only LTL3500)
Tilt and rotation indicator (optional feature - only LTL3500)
Road surface temperature (optional feature - only LTL3500)
Ambient temperature & humidity (only LTL3500)
GNSS-signal is activated i.e. Global Navigation Satellite System
(optional feature)
Battery status

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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 press Xon 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:
Icon
Function
Explanation
Measure
Perform an inspection
Series
Select, add, edit, or delete series of measurements
Templates
(only LTL3500)
Select, add, edit, or delete a template
Users
Select, add, edit, or delete a user
Log
Export measurement series to USB stick or delete data
Calibrate
Calibrate the LTL3000/LTL3500
Settings
Adjust settings (language, time, date etc.)
Shutdown
Power off the instrument
Note: all information you enter or alter under the individual menu items is automatically stored in the instrument.

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Perform a measurement
Select ‘Measure’ from the main menu, and the instrument is now ready to perform a measurement.
Place the instrument on top of the specific road marking you want to measure and press the green button on
the instrument handle.
Wait a second until the reading is shown on the display.
LTL3000 display:

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LTL3500 display:
The measurement data is automatically saved by the instrument. You can now continue to conduct another
measurement.
If you want to switch to another series, pressing and choose the relevant series from the drop-down
menu (or select it in the Series menu) and continue with your measurements.
Actions
There are various actions you can do with your current measurement. Activate the actions menu by pressing
at the top right corner on the screen.

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Elements in the actions menu:
The elements in the actions menu are explained in details in section ‘Actions Menu’ later in this manual.

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Working with series and templates
It is very easy to use the instrument to conduct measurements, and the instrument helps you organize the
data:
•Your measurements are stored in series. A series is defined as all the collected data and
measurements for a specific work assignment.
•Your series are based on a template (only LTL3500). A template defines which settings should be
applied to a series. The template specifies the data fields to be captured during an inspection e.g.
wet timer, RL pass/fail check.
You can add, select, edit, or delete series of measurements. Likewise, you can add, select, edit, or delete
templates.
In practice, when you add a new series you must decide which template to use for your series before you
conduct the measurements. If you select an existing series from your list, then a template is already linked to
the series.
Templates (only LTL3500)
Start by selecting ‘Templates’ from the main menu. On the display, all your templates are now listed on the
left side of the screen.
Select a template: Press the template on the list, you want to use –the template is now selected. Tick off
the template variables you want to activate. Add user defined variables by ticking off ‘Enable 3rd party data’.
You can now continue selecting a series for your measurements (switch to ‘Series’ in the main menu).
Add a new template:Press on the top bar to add a new template and write a name in the ‘Name’ field
for your new template (use the keyboard on the touch screen). Tick off the variables you want connected to
this template. The template is now added, and you can continue selecting at series for your measurements
(switch to ‘Series’ in the main menu).
Edit a template: From the template list, select the template you want to edit and type the new name of the
template in the ‘Name’ field. Select or deselect variables from the variable list. When finished press return
arrow, and the new name of the template is saved.
Delete a template: Press the template on the list that you want to delete, then press on the top bar. The
template is now deleted. Note: It is required that at least one template exists, thus it is impossible to delete
the last template.