Delta LTL-XL User Manual

DELTA · Ven lighedsvej 4 · 2970 Hørsholm · Denmark · Tel. [phone] · roadsensors@ de lta.dk

LTL-XL RETROREFLECTOMETER

Manual

On site quality control of road markings & road surfaces in accordance with CEN / ASTM
specifications

ii LTL-XL Retroreflectometer DELTA

DISCLAIMER

The information contained in this document is subject to
change without notice.

DELTA LIGHT & OPTICS 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 PARTICU­LAR PURPOSE. DELTA LIGHT & OPTICS 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.

LTL-XL IS BUILT ON GENERAL PUBLIC LICENSE COM­PONENTS. THE SOURCS CODE IS AVAILABLE UPON
REQUEST.

Caution: Changes / modifications not approved by the re-

sponsible party could void the user’s authority to operate the

equipment.

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 residential
area is likely to cause harmful interference in which case the
user will be required to correct the interference at his / her
own expense.

Update, August, 2016
Version 1.04a English

DELTA LTL-XL Retroreflectometer

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iv LTL-XL Retroreflectometer DELTA

DELTA LTL-XL Retroreflectometer

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TABLE OF CONTENTS

SECTION 1 ................................................................................................................................ 7

OPERATING INFORMATION ...................................................................................................... 7

LTL-XL introduction ................................................................................................................................ 7

LTL-XL retroreflectometer features ......................................................................................................... 8

Options ...................................................................................................................................................... 8

Getting started ........................................................................................................................................... 9

Important guide lines for the correct use of the LTL-XL ....................................................................... 12

SECTION 2 .............................................................................................................................. 13

GENERAL INFORMATION ........................................................................................................ 13

Measurements ......................................................................................................................................... 13

Notes on error sources ............................................................................................................................ 13

High temperature conditions. .................................................................................................................. 14

SECTION 3 .............................................................................................................................. 15

THE USER INTERFACE .............................................................................................................. 15

Display and keyboard layout .................................................................................................................. 15

Measurement display / HOME screen .................................................................................................... 15

Upper icon row ....................................................................................................................................... 15

Lower icon row ....................................................................................................................................... 16

Push buttons ............................................................................................................................................ 16

The menu tree ......................................................................................................................................... 18

Setting up for measurements ................................................................................................................... 19

Selecting a User ID ................................................................................................................................. 19

Selecting a road marking icon................................................................................................................. 21

Setting the date and time ......................................................................................................................... 21

Setting the dimmer and back light (Display) .......................................................................................... 22

Setting the sound level ................................................................ ................................ ............................ 23

Auto Sleep (Power) ................................................................................................................................. 23

Auto Off (Power) .................................................................................................................................... 24

Setting the language ................................................................................................................................ 24

Setting the temperature unit .................................................................................................................... 24

Setting the SMART key function ........................................................................................................... 24

Using GPS (optional) .............................................................................................................................. 24

Setup (basic and advanced) ..................................................................................................................... 26

MEASURE TYPE ........................................................................................................................... 27

RL & Qd .................................................................................................................................................. 27

Wet timer ................................................................................................................................................ 27

Timer Alarm ........................................................................................................................................... 27

SERIES ID ....................................................................................................................................... 28

Working with series ID ........................................................................................................................... 28

Activate ................................................................................................................................................... 28

Selecting a series ID ............................................................................................................................... 28

Enter a new series ID .............................................................................................................................. 29

Removing a series ID .............................................................................................................................. 29

Presetting the road marking icon ............................................................................................................ 29

THE LOG ........................................................................................................................................ 31

Clearing data in the log ........................................................................................................................... 31

Viewing the log ................................ ................................ ................................................................ ....... 32

View series data. ................................ ................................................................ ..................................... 33

OTHER SETTINGS ....................................................................................................................... 34

Average function .................................................................................................................................... 34

Editing names ......................................................................................................................................... 35

Auto print ................................................................................................................................................ 35

vi LTL-XL Retroreflectometer DELTA

Diagnostics ............................................................................................................................................. 35

The help system ...................................................................................................................................... 35

Errors and warnings ................................................................................................................................ 36

RSC software program ............................................................................................................................ 36

SECTION 4 .............................................................................................................................. 37

MAINTENANCE ............................................................................................................................ 37

General care ............................................................................................................................................ 37

Protection window .................................................................................................................................. 37

Battery .................................................................................................................................................... 37

Fuses ....................................................................................................................................................... 39

Lamp ....................................................................................................................................................... 39

Calibration unit ....................................................................................................................................... 40

Calibration .............................................................................................................................................. 41

Printer (optional) ..................................................................................................................................... 43

Mounting the wheel unit (option) ........................................................................................................... 44

APPENDIX A .......................................................................................................................... 45

COMMUNICATION FACILITIES .............................................................................................. 45

RSC software program ............................................................................................................................ 45

APPENDIX B .......................................................................................................................... 46

SPECIFICATION ........................................................................................................................... 46

General characteristics ............................................................................................................................ 46

Environmental characteristics ................................................................................................................. 47

Mechanical characteristics ...................................................................................................................... 47

APPENDIX C .......................................................................................................................... 48

DELIVERY ..................................................................................................................................... 48

Visit our web-site “www.roadsensors.com”

DELTA LTL-XL Retroreflectometer 7

SECTION 1

OPERATING INFORMATION

LTL-XL introduction

The LTL-XL retroreflectometer is a portable field instrument intended for measuring the
retroreflection and reflection properties of road markings. LTL-XL measures the RL value
(coefficient of retroreflected luminance at night) and the Qd value (day light visibility). RL is
a measure of the lightness of the road marking as seen by drivers of motorized vehicles in car
headlight illumination. The road is illuminated at an angle of 1.24The illumination for Qd is
diffuse. The reflected light for both RL and Qd is measured at an angle of 2.29, which corre­sponds, to an observation distance of 30 meters. This is relevant for a motorist’s viewing situ­ation under normal conditions. Further information on measuring principles and standards can
be found on www.roadsensors.com.

Figure 1. The instrument

The operation of the retroreflectometer is very simple and requires minimal instruction.

The LTL-XL measures the retroreflectivity and calculates RL and Qd according to the interna­tional CEN and ASTM standards. Results are presented in plain text on a large graphic dis­play. Error messages or warnings are shown in the display in case of any problems during use.
The memory of the instrument provides registration of measurements with corresponding
date, time and other relevant data. The following data is also registered (if enabled):

RL and Qd are important factors in the ON-SITE quality control of road markings.

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• Name of measuring series (road name)

• Profile icon for road marking type

• User name

• GPS data (if installed)

• Temperature & humidity

• Instrument status

The measurement results can be printed by the built-in printer (optional). Communication
with a PC using the RSC (Road Sensor Control) software program (see pg. 36) allows for data
exchange with other PC programs.

A rechargeable NiMH (Nickel-Metal Hydride) standard battery powers the LTL-XL, allowing
approx. 1,100 measurements on a new and fully charged battery. The optional high capacity
battery can provide approx. 2,500 measurements. A mains powered 15V power adaptor for
charging is supplied as customary delivery. Charging time is approx. 1½ hour for the standard
battery and 3½ hour for the high capacity battery. The instrument can also be charged from a
15-18 VDC source. For field charging the 15V power supply could be powered from an “AC
power inverter” connected to the car battery.

LTL-XL retroreflectometer features

• Portable instrument

• Ergonomic operation height

• Fast measurement (completed in less than 1 sec. for RL or Qd and 3 sec. for RL +Qd)

• Measuring on dry and wet surfaces

• Will measure flat, textured & profiled markings up to 5 mm

• Fully documented measurements with automatic data storage, user and series identi-

fication for labeling and grouping measurements

• Audible signals during use (if enabled)

• RSC (Road Sensor Control) PC software for data exchange. Log data can be

exported to applications such as Microsoft Excel or displayed on Google Earth

• Easy one-step calibration procedure

• Traceable and accredited calibrated reflection standard

• User replaceable battery

• Fast charging, approx. 1½ hour for standard and 3½ hour for high capacity battery

• Rechargeable from mains using power

• Average (2-99 readings)

• Multiple languages

Options

• Built-in GPS for precise logging of measuring location

• Wheel unit and extendable handle

• Build-in thermal printer

• High capacity battery

DELTA LTL-XL Retroreflectometer 9

Getting started

Buttons:

HELP ON/OFF

MENU SMART

HOME CALIBRATE

BACK PRINT

UP

LEFT RIGHT

OK (center)

DOWN

Figure 2. Buttons

Height adjustment (optional)

Before using the LTL-XL, notice that the operating panel can be adjusted in height for er­gonomic considerations. The height is adjusted by pressing the red knob on the front of the
instrument and at the same time lifting the handle on the operating panel. Release the knob
and continue lifting until the handle locks.

Turn on

Turn on the LTL-XL by pressing and holding the ON/OFF button until the display
turns on. The instrument will be ready for measuring within 10 seconds. The LTL-XL
wakes up from standby within 1 second.

Measuring

Calibrate the instrument if needed. DELTA recommends calibrating the instrument every
time the instrument is switched on and / or starts a new series of measurements or mini­mum once a day typically in the morning before measurement start. See Calibration, pg. 40

Place the instrument on the road marking. See positioning on the road pg. 12

Press the green OK-button to take a measurement. A single RL or Qd measurement
takes approx. 1 sec. A combined RL and Qd measurement takes 3 sec.

When the measurement is complete, the RL and/or Qd value will be displayed. Data is au­tomatically transferred to the data log. If there is a problem with the measurement a warn­ing icon or an error icon will pop up (see Errors and warnings, pg. 36) and an audible alarm will
sound (if enabled, see Sound settings, pg 27).

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Measurements taken with a low battery warning are marked in the log and a warning icon

appears. If battery voltage gets too low measurements can’t be taken and an error icon ap-

pears.
To print the latest measurement data, press the PRINT button (Requires the printer op-

tion).

User select (user initials)

If a user icon is displayed in the upper icon row on the measuring display, press the UP
button ▲and if necessary ◄ or ► to mark the user icon. Press the OK button to enter the
user select menu. For further information see Selecting a user id, pg. 19.

Series ID select (name)

If a user icon is displayed in the upper icon row on the measuring display press the UP
button ▲to mark the road icon. Press the OK button to enter the Series ID select

menu. Select a name from the list using UP or DOWN and accept with OK or ENTER /
EDIT a new name.

If the icon is not shown or if further information is need, see Series Id, pg. 28

Calibration

The instrument is supplied with a reference calibration unit. The reference calibration unit
is factory calibrated and traceable to PTB (Physicalish-Technische Bundesanstalt, Germa­ny) and NIST (National Institute of Standards and Technology, USA).

Calibration procedure

Before a calibration is carried out make sure that the calibration unit is clean.

To carry out a calibration go through the following steps:

• Before mounting the calibration unit check the RL and Qd values stamped on the cal-

ibration unit.

• Mount the calibration unit underneath the instrument. Make sure that the pins on the

interface plate fit into the holes on the calibration unit. Be very careful when you
place the instrument on the calibration plate not to damage the calibration unit and /
or the light diodes

• Press the CALIBRATION button once. Select RL or Qd calibration to calibrate one

at a time.

• Adjust the calibration value shown in the display so it matches the value stamped on

the calibration unit. See the Calibration section for details.

• Press the OK button to finish the calibration. If an error occurs ensure that the

• preceding steps have been taken and try again.

• Repeat the calibration process for the other quantity (RL, Qd)

The calibration procedure is now complete. Remove the calibration unit and store it properly.
Press OK to return to the measurement display. For further details see pg. 41

DELTA LTL-XL Retroreflectometer 11

Errors and warnings

An error or warning icon will appear in the upper row of the display if the LTL-XL detects

a problem. Press the UP button ▲ to get a description of the most serious error or warning.
Press the UP button ▲ to get a description of the most serious error or warning. Now press
the OK-button to display a total list of all errors or warnings related to the measurement and
the instrument in general.

Sound setting

Press the MENU button and select SETTINGS / SOUND. Select KEY CLICK or SOUNDS to
set the individual sound levels for key click and system sounds. Use the UP ▲ or DOWN ▼
button to set the level. Accept the setting by pressing the OK button.

Miscellaneous

The HOME screen can be activated at any time by pressing the HOME button .

Reset log: Press the MENU button and select LOG / CLEAR DATA.Now se-

lect from the menu: CLEAR LAST DATA, CLEAR ALL DATA or
CLEAR SERIES DATA.

Date and time: Press the MENU button and select SETTINGS / DATE & TIME / SET

TIME/DATE. Use the UP ▲ and DOWN ▼ buttons to set the differ­rent time related settings.

Power save: Press the MENU button and select SETTINGS / POWER / AUTO

SLEEP, AUTO OFF. Use ▲and ▼ to edit the values.

Data exchange / communication

The RSC software program, developed by DELTA for use on a PC, allows data to be ex­changed between the LTL-XL and a PC. See RSC-program, pg. 36

12 LTL-XL Retroreflectometer DELTA

Important guide lines for the correct use of the LTL-XL

Positioning of the instrument on the road marking

Select an area of the pavement marking that is level when taking readings. The measurement
field is marked with a yellow sticker on one side of the base cover. The measurement field is
approximately 50 mm / 1.97 inch wide and 185 mm / 7.28 inch long. Ensure that the pave­ment marking to be measured before taking measurements is free of debris. Make sure that
the instrument is stable positioned.

Reason: The LTL-XL has three support pads, each with a small footprint, two smaller in the
front and one larger at the back. An uneven marking or a small piece of gravel trapped below
one of the pads will move the measurement field and affect the reading.

Taking the measurement

Press the green OK button to take a single or double reading as selected. Do not put pressure
on the handle when taking a measurement.

Reason: Pressure on the handle can tilt the instrument slightly and affect the measurement
geometry and thus influence the reading.

Number of measurements.

For accurate readings, do not take just one reading of a road marking. Three readings will
give a more accurate result than one reading. Five readings will give an even more accurate
result than three readings, etc. Take the readings in adjacent areas of the marking. Let the in­strument calculate the average of the readings (fixed or moving average options).

Reason: A road marking’s retroreflectivity varies from area to area. It is not unusual to see
variations of 5% - 20% when the instrument is moved even less than 10 mm / ½” in either
direction.

Protective display shield.

For the protection of the display and longevity of the instruments keep the display shield
closed when the instrument is not used. For further information please see section 2.

Remember:

Read:

▪ LTL-XL is an optical precision instrument, handle with care.
▪ Keep the protection window and calibration unit clean and undamaged.
▪ Store in a clean, dust free and dry environment.

Measurement practise for road markings. This leaflet can be located on:

http://www.roadsensors.com

DELTA LTL-XL Retroreflectometer 13

SECTION 2

GENERAL INFORMATION

Measurements

The LTL-XL retroreflectometer measures the RL (coefficient of retroreflected luminance) pa­rameter and Qd (the day light visibility). The RL parameter represents the brightness of road
markings seen by drivers of motor vehicles by headlight illumination. Qd represents the visi­bility of the road markings under day light conditions.

In the LTL-XL the illumination angle is 1.24 degrees for RL, the illumination for Qd is dif­fuse. Both observation angles are 2.29 degrees. According to both ASTM and CEN standards
these angle simulates a driver’s viewing distance of 30 meters. The instrument’s illumination
field is approximately 185 mm x 50 mm / 1.97 x 7.28 inch.

Push the button from the HOME screen to take a measurement. Shortly after, the RL and
related information are presented on the colour display. The result is automatically transferred
to the internal memory. The measurement, along with its corresponding time, date, and other
data can be printed using the (optional) built-in printer.

Every measurement contains status information. If an error occurs the information can be in­terpreted by the warning/error icon in the top line of the display. The information is available
until a new measurement is taken. The status information is stored in the log.

Notes on error sources

Stray light can occasionally enter the instrument but will be insignificant under normal meas­urement conditions. The LTL-XL compensates for stray light automatically.

Instrument drift and offset errors are compensated by means of data obtained during the cali­bration procedure. It is very important to keep the dust-protection window and the ceramic on
the calibration unit clean.

The LTL-XL illumination angle is 1.24° relative to the road surface. Because of this small
angle accurate placement on the road is important. Avoid pebbles and abnormal irregularities.
The LTL-XL must be parallel and in contact with the marking surface.

The LTL-XL retroreflectometer is a rugged instrument, but it is an optical instrument and
must be handled as such.

The LTL-XL is factory calibrated. Nevertheless start measurements with a calibration. Study
the display for any warning or error icons. See also Section 4 - Maintenance

Note

Keep the dust-protection window and ceramics on the
calibration unit clean.
Keep the battery fully charged. A well charged battery is
more resistant to aging and damage.

14 LTL-XL Retroreflectometer DELTA

High temperature conditions.

Display

If the display is exposed to intense direct sunlight during a longer period of time the display
may overheat. It is recommended to close the protective display shield. The shield also pro­tects against damages and scratches. "Daylight readable" displays are vulnerable to high tem­peratures. High temperature will decrease the display service life.

Battery

The battery is rated to operate between 0C / 32F and 45C / 113F.

Fig 3. LTL-XL, the inside

DELTA LTL-X Mark II Retroreflectometer 15

SECTION 3

THE USER INTERFACE

Figure 4: The HOME screen

Display and keyboard layout

The user interface consists of a rectangular display surrounded by push buttons. The display
has two main modes: the measurement display (HOME screen) and the menu display. The
instrument will start up with the measurement display shown. The display area is divided into
four areas: a large main display in the middle, an icon row at the top, a message or caption
field underneath and an icon row at the bottom.

Measurement display / HOME screen

Here the latest measured RL and/or Qd values are presented with large digits together with
other information. On the graphic in figure 4, all available information’s are shown in the dis­play. If a function is deactivated, it will not be shown. The actual date and time is always
shown.

Upper icon row

The upper row of icons is accessed by pressing the UP button ▲. One of the icons is then
highlighted and can be activated by pressing the OK button. The other icons in the row can be
accessed by using the LEFT ◄ or RIGHT ►buttons. The meanings of the icons are (from left
to right):

• Series ID selection, can be switched off (see pg.28).

• User ID selection, can be switched off (see pg. 19).

• Error/warning alarm. Will be shown in case of an error/warning (see pg. 36).

• GPS indication (see pg. 24).

• Battery status (see pg. 39).

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Lower icon row

• From the lower icon row you can select a road marking icon that will be saved together

with the measurement in the log. Access the icons by pressing the DOWN button ▼. Use
the LEFT or RIGHT button to mark the preferred icon. Pressing DOWN again shows more
icon rows from a roll stack of four rows. One row, marked with a "PR" for "Preset" can
be preset by the user (see pg. 30) and is saved separately for each measuring series. It will
be the active icon row, ready for selection, when a measuring series is selected.

• Activate the marked icon with the OK button or exit with the HOME or UP ▲ button.

The selected icon is now shown in the left side of the HOME screen and the instrument
is again ready for measuring.

• Other functionality regarding the lower icon row:

Activating an already selected icon will cancel the activation and remove the icon from

the main display (and no icon will be saved by the next measurement).

Push buttons

OK

When the message row shows MEASURE, press the OK button to take a measurement. In most
other cases pressing the OK button will activate a highlighted selection.

ON/OFF

The button turns the instrument ON or OFF and enters the standby mode. Press the button to
turn the instrument ON. The start-up time is ~10 seconds when the LTL-XL is turned OFF. If
the LTL-XL is in standby it turns on within 1 second.
Press the ON/OFF button for 1 second to enter standby mode.
Press the ON/OFF button for 5 seconds to turn the LTL-XL off.

When the instrument is in standby mode, a short press on the button will turn on the display.
It is not possible to turn off the instrument during battery charging or when connected to a
USB port.

HOME

Bring you back to the measurement display.

BACK

Bring you backward one step in the menu and cancel new settings, which have not yet been
confirmed by the OK button. In most cases the LEFT button has the same function.

HELP

The button presents a context sensitive help text. The help presented will be on the subject
headline shown in the display. Another press on the button will open up a general help menu.

DELTA LTL-X Mark II Retroreflectometer 17

Menu

The button selects the top level of the menu tree, the main menu. Use the UP and the DOWN
buttons to scroll through the menu items. Press OK to select the highlighted item. In most cas­es it opens up further submenu levels.

SMART

This button is user programmable to one out of several functions, e.g. to clear the last meas­urement, see pg. 24.

CALIBRATE

This button starts the calibration wizard, see pg. 41

PRINT

Print out the last measurement or selected parts of the log to the (optional) printer. In the di­agnostics menu you can print out different instrument information’s.

18 LTL-XL Retroreflectometer DELTA

The menu tree

Figure: 5 – The menu tree

SETTINGS:
USER
DATE & TIME
DISPLAY
SOUND
POWER
LANGUAGE
TEMPERATURE
SMART
AUX
SETUP

SERIES-ID:
ACTIVATE
SELECT NEW
EDIT
DELETE
PRESET MARK

AUX:
GPS

SOUND:
KEY CLICK
SOUNDS
BEEP

DISPLAY:
BACKLIGHT
DIMMER
DIM LEVEL
BACKGROUND

DATE & TIME:
TIME FORMAT
DATE FORMAT
SET TIME/DATE
TIME ZONE
SYNC TO GPS

USER:
SELECT
EDIT
NEW
DELETE
SEL. AT START

DIAGNOSTICS:
INSTRUMENT
BATTERY
BOARDS
GPS
SYSTEM

AVERAGE:
AVERAGE
TYPE
NUMBER
RESET

LOG:
CLEAR DATA
VIEW LOG

CLEAR LOG:
LAST DATA
ALL DATA
SERIES DATA

VIEW LOG:
LAST DATA
ALL DATA
SERIES DATA

MEAS. TYPE:
RL
Qd
WET TIMER
TIMER ALARM

HELP:
HELP ON KEYS
HELP ON MENU
HELP ON MEASUREMENT
HELP ON SERIES SELECT
ROAD MARKING SELECT
HELP ON USER SELECT
HELP ON EDITING
HELP ON AVERAGING
HELP ON GPS
HELP ON SETTINGS MENU
HELP ON SERIES-ID MENU
HELP ON LOG MENU

POWER:
AUTO
SLEEP
AUTO OFF

MAIN MENU
SETTINGS
MEASURE TYPE
SERIES-ID
LOG
AVERAGE
DIAGNOSTICS
HELP
AUTOPRINT

DELTA LTL-X Mark II Retroreflectometer 19

Setting up for measurements

Selecting a User ID

The user ID (user profile) is used to identify the operator and is saved in the log together with
each measurement. If enabled, it can be seen at the lower left side of the measurement display.
Measurements can also be taken without a user ID. Unlimited user ID’s can be stored in the
instrument.

Certain instrument settings are stored individually for each user. Selecting a user will restore
these settings. Following settings are stored:

• User, sel at start

• Time format

• Sync to gps

• Backlight time

• Dimmer time

• Dim level

• Background (on/off)

• Key repeat (time)

• Setup (basic/advanced)

• Auto off time

• Auto sleep time

• Key click sound level

• Sound level

• Beep (on/off)

• Activated series

• Average (on/off)

• Average type

• Average number

• Wet timer

• Wet timer alarm/measure

• Calibration value

• Temperature units (°c/°f)

• Languages

• Smart key function

The select procedure.

If a user select icon is not seen in the upper icon row:
Press the MENU button and select SETTINGS / USER / SELECT to display the USER menu.

If a user select icon is seen in the upper icon row:
Press the UP button. Then, if necessary use the LEFT or RIGHT button to highlight the user
icon. Press the OK button. The USER menu is shown:

20 LTL-XL Retroreflectometer DELTA

Now use the UP or DOWN button to highlight a user name. Press the OK button to accept the
name.

Changes made to the above mentioned individual instrument settings are automatically stored
in the selected User ID.

Selecting OFF will deactivate the user function and set all individual instrument settings to
default.

Edit user

User names can be edited from the menu SETTINGS / USER / EDIT (see editing pg. 35).

New user

A new user can be entered from the menu SETTINGS / USER / NEW (see editing pg. 35).

Clear user

Deleting the User ID will remove the user and settings from the memory.

Select at start

Enabling SEL. AT START will force the user to select a user ID each time the LTL-XL is
turned on.

Press the MENU button and select SEL. AT START. Press OK to toggle between YES and
NO

DELTA LTL-XL Retroreflectometer 21

Selecting a road marking icon

The purpose of a road marking icon.

The road marking icons are used as labels for the individual measurement corresponding to
the measured road marking and will be saved in the log together with the measuring result.
The icon will then be presented together with the corresponding measurement when viewing
the log or by using the RSC program (see pg. 30).

There are 24 fixed icons to select from. Six of the icons can be programmed as individual pre­sets for each series (see pg. 30) and will be ready for selection when a series is selected.

The procedure.

From the HOME screen press the DOWN button. Then use the LEFT or RIGHT button to high­light the wanted icon. Pressing DOWN steps through and displays the five icon rows. Pressing

UP will return to the HOME screen without selecting a new icon.

Pressing the OK button will activate the selected icon. The selected icon is now shown in the
left side of the measuring field and the instrument is again ready for measuring.

Deactivating the profile icon.

Activating an already selected marking icon will cancel the activation and remove the icon
from the main display.

Setting the date and time

Date and time is always shown in the display. Every measurement taken is marked with the
date and time, so it is essential that the settings are correct.

Press the MENU button and select SETTINGS / DATE & TIME. Press OK and the time format sub
menu is shown.

Setting the time format

Press OK when TIME FORMAT is highlighted and scroll between 12 and 24 hr format by push­ing the OK button.

Setting the date format

Navigate to DATE FORMAT and push OK

22 LTL-XL Retroreflectometer DELTA

Highlight the preferred date format using UP or DOWN. Press OK to accept.

Adjusting the time and date

Press OK when SET TIME/DATE is highlighted.

Press OK to activate each line and use UP or DOWN to set the figure. Press OK to accept the
setting.

Setting the Time zone

Press OK when TIMEZONE is highlighted. Press OK to open the list of geographical locations.
Choose your area. Press OK to select. Now a new list shows up with national time zones.
Scroll to your location and press OK to select.

Time zone is used in relation with automatic daylight saving and When SYNC. TO GPS is en­abled.

Note:

The time in this menu is not updated live, but it will synchronize

the time shown in the HOME screen.

Synchronize to GPS (optional)

When GPS is installed and SYNC. TO GPS is highlighted press OK to toggle between ON and
OFF. By activating this function make sure that the time zone is correct otherwise the clock

in the LTL-XL and the time stamp in the log data will probably not be correct.

Setting the dimmer and back light (Display)

The backlight and dimmer can be adjusted. Press the MENU button and select SETTINGS /
DISPLAY.

DELTA LTL-XL Retroreflectometer 23

The levels can be adjusted on a scale from 1 (lowest brightness) to 10. Press OK to activate
the function and use UP and DOWN to change the values. Press LEFT or BACK to store.
It is also possible to adjust the time before the light switch to dimmer mode from 5 to 120
seconds or set to OFF. The back-ground colour of the display can be switched off.

WARNING: Using high brightness will drain the battery faster!

Setting the sound level

Press the MENU button and select SETTINGS / SOUND. Select KEY CLICK or SOUNDS to set
the individual sound levels for key click and system sounds. Use the UP or DOWN button to
set the level. Accept the setting by pressing the OK-button.

To activate a highly audible beep when the instrument has finished measurement set BEEP to
ON by pushing the OK-button.

Note:

Auto Sleep (Power)

To save power the instrument can be setup to automatically change to Auto Sleep mode. The
Auto Sleep time can be set from 1 to 30 min. in intervals of 1 min. or it can be deactivated
(OFF). Press the ON/OFF button to wake up from sleep/standby.

Press the MENU button and select SETTINGS / POWER / AUTO SLEEP. Use UP and DOWN to
edit the auto turn sleep time. Press OK, LEFT or BACK to accept.

The beep indicates that the measurement is taken and the instrument can be
removed from the road marking. Data processing can be on going after the
beep and after a moment the display is updated.

24 LTL-XL Retroreflectometer DELTA

Auto Off (Power)

To save power, the instrument can be programmed to automatically turn off if not used for a
while.

Press the MENU button and select SETTINGS / POWER / AUTO OFF. Use UP and DOWN to edit
the auto turn off time. The off time can be set from 1 to 8 hours in intervals of 1 hour or it can
be deactivated (OFF). Press OK, LEFT or BACK to accept.
The LTL-XL will not turn off when either the power supply or a PC is connected.

When communicating with RSC program or when the power supply is connected the instru­ment will not power down automatically. The startup time will be approx. 10 seconds.

Setting the language

Press the MENU button and select SETTINGS / LANGUAGE. Use the UP or DOWN button to
select a language. Accept by pressing the OK button or leave unchanged by pressing BACK.

Setting the temperature unit

Press the MENU button and select SETTINGS / TEMPERATURE. Use the OK button to select be­tween Celsius and Fahrenheit. Accept by pressing the BACK button.

Setting the SMART key function

This button is user programmable to one of several functions, e.g. to clear the last meas­urement. Press the MENU button and select SETTINGS / SMART.

Use the UP or DOWN button to select the SMART KEY function. Accept by pressing the

OK button.

The selected function is now accessed every time is pressed

Using GPS (optional)

The GPS system, if installed, is used to log position data (latitude and longitude) to the log
together with the measurement data.

If the GPS is activated the GPS icon is shown in the upper icon row

DELTA LTL-XL Retroreflectometer 25

The icon will display the quality (reliability) of the GPS signal.

GOOD: The GPS HDOP (Horizontal Dilution Of Precision) value is below 5.

FAIR: The GPS HDOP value is larger than 5, but the GPS can FIX.

NO: The GPS cannot FIX (weak or no signal).

The GPS position data, HDOP value, and the number of satellites used in the position calcula­tion are saved in the log together with the RL and Qd data.

Activating the GPS

Press the MENU button and select SETTINGS / AUX, highlight the GPS line and press the OK
button to toggle the GPS ON or OFF. Press the BACK button or the HOME button to return to
the HOME screen.

The GPS data can be viewed from the HOME screen by pressing the UP button and then high­lighting the GPS icon by using LEFT or RIGHT buttons. Press the OK button to display the
GPS data. When the GPS data changes the display is updated.

If the GPS cannot acquire fix and a measurement is taken a warning menu appears. You will
be presented with the following option:

• No GPS fix. Measure anyway: NO / YES?

More about the GPS

The GPS unit will typically acquire satellite signals and process a position fix in 1-15 seconds
after the LTL-XL is turned on. If the GPS receiver has been turned off for a long period of
time or the instrument has been moved far away for its last position, the time to first fix will
take longer.

LTL-XL logs the following GPS information:

LATITUDE, LONGITUDE, UTC TIME, HDOP, NUMBER OF SATELLITES USED,
POSITION FIX FLAGS AND DATUM.

“Position Fix Flags” is interpreted by the LTL-XL software and the information’s are shown
in plain text in the View log,

Datum is by default set to: WGS84 and cannot be changed.

Latitude and Longitude are output in the format:
Degrees, Minutes and (Decimal) Fractions of Minutes.

The GPS engine used has a navigation performance of 2.5 m CEP1)

The precision of the GPS receiver is determined by many factors. A few are listed below:

• Signal obstruction. The GPS receiver requires a clear view of the sky. Trees, build-

ings and other environmental objects may affect the satellite signals.

• Satellite constellation and geometry.

• Multi path (reflection of signal from buildings etc.).

26 LTL-XL Retroreflectometer DELTA

The HDOP (Horizontal Dilution of Precision) is a number that indicates the quality and preci­sion of the received GPS data (low values are better than high).
A HDOP value <1 indicates a high precision position. HDOP signals between 1 and 5 indi­cates an fair precision and DHOP values >5 a poor precision

When the GPS is used, the operating time for the LTL-XL is slightly decreased and you may
have to charge the battery more often.

1)

CEP (Circular Error Probable):
A statistical measure of the horizontal precision. The CEP value is defined as a circle's radius, when
centered at the true position, encloses 50% of the data points in a horizontal scatter plot. Thus, half the
data points are within a 2-D CEP circle and half are outside the circle.

Setup (basic and advanced)

Setup is used to separate between basic and advanced users. The basic settings reduce the
number of menus available to the user. For example, in basic menu operation, users cannot
clear the log.

The following menu points can be selected in basic mode:

Settings: User, Date & Time, Display, Sound and Temperature, Setup
Measurement type: RL, Qd, Wet timer, Timer alarm
Log: View log
Diagnosis: Instrument, Battery, Boards, GPS, System
Help: All menus available
Auto Print

ADVANCED setting will provide access to all menu functions.

To change the setup, press MENU and select SETTINGS / SETUP. Pressing OK will toggle be­tween ADVANCED and BASIC. To return from setup press BACK or HOME.

DELTA LTL-XL Retroreflectometer 27

MEASURE TYPE

RL & Qd

When taking wet or rain simulation measurements some procedures describe to wait a certain
amount of time from the marking is made wet and to the measurement is taken. The WET
TIMER assists the operator to time this kind of measurements.

Wet timer

The wet timer function works for RL measurements only. The timer can be adjusted between
15 and 60 seconds. The wet timer automatically carries out the measurement or sound an
alarm after the set period of time.

Timer Alarm

Toggle between “Measure” or “Alarm”. The selected option is used when wet timer times out.

28 LTL-XL Retroreflectometer DELTA

SERIES ID

Working with series ID

The purpose of a series ID

The series ID is a label, for example the name of a road. Although measurements can be per­formed without selecting a series ID, it is convenient to group (name) the measurements for
each geographical spot, road or part of a road for easier recognition. The series ID for such a
group of measurements will be saved in the log together with the measuring results. The ID
must be selected prior to the measurement.

The individual measurements in a group can further be labeled by selecting a road marking
icon (see pg. 29) corresponding to the actual road.
.

Activate

To use the series ID it must be activated. Press the MENU button and select: SERIES ID /
ACTIVATE SERIES. By pressing OK you can toggle between ON and OFF, to activate or deac-

tivate the series ID function. Press BACK or press the HOME button to return to the HOME
screen. When the series ID is off no ID is shown in the display.

Selecting a series ID

From the HOME screen press UP. If necessary, use the LEFT or RIGHT button to highlight the
road icon . Press the OK button. The SERIES ID menu is shown. Choose SELECT to ac-

cess the available series ID.

Press the OK button to accept the name.

DELTA LTL-XL Retroreflectometer 29

Enter a new series ID

Do the same as above but select NEW from MAIN MENU / SERIES ID. Proceed by spelling the
series name. Press END in the spelling section to save.

Edit a series ID

Do the same as above but select EDIT from MAIN MENU / SERIES ID. Proceed by editing the
series name. Press END in the spelling section to save.

Removing a series ID

This will remove the series ID from the selection list. Press the MENU button and select
SERIES-ID / DELETE:

Use UP or DOWN to select the series that should be deleted. Accept by pressing the OK but­ton.

A confirmation menu is shown:

Note! All measurements in the selected series will be erased from the log!

If a large numbers of Series Id’s are to be deleted this can more easily be done from the

RSC program from the project tab click . (Road Sensor Program) see pg. 36

Presetting the road marking icon

Six of the 24 road marking icons can be programmed as individual presets for each series ID
and will be ready for selection when a series ID is selected. Press the MENU button and select
SERIES-ID / PRESET ROAD MARKINGS to enter the SELECT MARKING menu:

30 LTL-XL Retroreflectometer DELTA

The bottom line shows the present six preset icons.

Use the LEFT, RIGHT, UP and DOWN buttons to choose a new icon for the first position, ac­cept by pressing the OK button and the cursor (frame) will move to the second icon. Repeat
for all six icons and the programming is done. You can amend at any point by pressing the

BACK button and start over again. Press the BACK button to save.

DELTA LTL-XL Retroreflectometer 31

THE LOG

Every measurement is stored in the log. The following data, among others, are saved, if ena­bled:

• Measurement result incl. average

• Date and time.

• Name of measuring series (road name) and sequence number.

• Road marking icon

• User name

• GPS data (if installed).

• Instrument status

• Temperature & humidity

The instrument can store >200.000 measurements in the log.

Clearing data in the log

Press the MENU button and select LOG / CLEAR DATA:

This menu gives the option to clear information stored in the log:

• the last measurement,

• all measurements

• one of the series

By pressing the OK button you will be asked to confirm the erasure of the data. By pressing

LEFT data will be cleared. By pressing OK they will not be cleared. .

32 LTL-XL Retroreflectometer DELTA

If you selected SERIES, you may select the series you wish to delete from the log from the list
shown. Only the log entries will be erased. The series will still be available in the series select
list.

Viewing the log

Press the MENU button and select LOG / VIEW LOG:

This menu gives the possibility to view and print data from information stored in the log:

• the last measurement

• all measurements

• one of the series

Selecting All Data or Series Data will display a list of measurements. Scroll through the list
with UP or DOWN button. Press OK-button to get further information on the selected log entry:

The figure below shows detailed information on the data logged from a measurement

In the first line, the menu shows the RL and Qd value, thereafter in the following lines other
key measurement data. To view a list of the individual errors/warnings in the status, print out
the measurement (see below).

DELTA LTL-XL Retroreflectometer 33

Press the PRINT button to print the log from the highlighted measurement. Any warning or
errors detected during the measurement will be shown in the print out.

To return to the log menu, press BACK

View series data.

In the log menu, select SERIES DATA to view the list of series.

The menu shows a series ID in each line. By pressing DOWN or UP, the individual series are
highlighted. Highlight a series and press the OK button to view the individual measurements.

Highlight a measurement in the individual display and press the PRINT button to print the
measurements.

To return press the BACK button.

For transfer of measurement data for processing check about the RSC program, see pg.36

The LTL-XL log and display will be able to show the most recent 500 measurement taken,
additional measurements will still be kept in the log and can be viewed when transferred to a
PC.

The LTL-XL log is not intended for data storage. Even if the log may store up to 200.000
measurements an increasing number of logged measurements will gradually slow down the
performance of the LTL-XL. If a slowdown is seen make a transfer of data to reduce or empty
the log.

34 LTL-XL Retroreflectometer DELTA

OTHER SETTINGS

Average function

An average function can be activated showing the average of the measured RL & Qd values
calculated over a selectable number of measurements (N = 2 to 99). The average mode can be
fixed or moving. In moving mode the average is always calculated from the last N measure­ments where N is the selected number of measurements. In fixed mode the averaging will
start over again when N measurements have been taken. The average data is shown in the
HOME screen at the lower right corner (see picture pg. 15).

Press the MENU button and select AVERAGE:

AVERAGE:

Use the UP or DOWN button to highlight the first line. Press the OK button to toggle be­tween AVERAGE ON and AVERAGE OFF.

TYPE:

When selected press the OK button to toggle between type: MOVING and type: FIXED.

NUMBER:

When selected press the OK button to focus on the NUMBER digits. Use the UP or

DOWN button to change the value between 2 and 99. Finally press the OK button to con-

firm the new value. The default setting is 4.

RESET:

Select RESET and press the OK button to reset the calculated average value and reset
the number of measurements included in the average to zero.

DELTA LTL-XL Retroreflectometer 35

Editing names

From certain points you arrive to the EDIT menu e.g. is you want to define a USER. You will
arrive to the following screen:

With UP, DOWN, LEFT and RIGHT you can navigate around the letters, numbers, symbols
and space. The “arrow” will delete the last character. Press enter to select. When you have
finished, press END for returning to the menu, where you started.

Auto print

Press the MENU button and highlight AUTOPRINT. Press the OK button to toggle between ON
and OFF. If AUTOPRINT is activated a print is automatically made every time a measurement
is taken. Press BACK to return to MENU.

Diagnostics

Press the MENU button. Highlight the line DIAGNOSTICS. Press the OK button, and the menu
showing the following:

Each line gives information aimed at extended service and factory use. The information pre­sented on the screen will be printed if you press the PRINT button.

The help system

Press the HELP button to show a context dependent help page. Pressing HELP once more will
present a general help menu in which you can highlight a subject by using the UP or DOWN
button and the press the OK button to show the help text. The HELP section is also accessible
on the main menu.

36 LTL-XL Retroreflectometer DELTA

Errors and warnings

When a measurement is taken, a warning text is generated if a problem arises and saved in the
log together with the measurement. If a problem occurs, a warning icon or an error icon

is show above the HOME screen and an audible alarm is sounded (if enabled) and error

is stored in the log.

To view the nature of the problem, press the UP button and the warning/error icon will be
highlighted. The most severe problem will be stated in the message line underneath.
Then press the OK button to view a total list of problems starting with the most severe.
Press the BACK button to return to the HOME screen. If the problem did not hinder the com­pletion of the measurement, the erroneous value(s) will be saved in the log, which can identi­fy the problems when the log is evaluated using the RSC program. If an error is registered the
measurement will not be recorded.

RSC software program

Main features of the RSC (Road Sensor Control) software program delivered together with
the LTL-XL:

• Transfer of log data to a PC

• Export of log data to other programs e.g. spread sheets

• Printing reports of the log data

For more details see the separate user’s manual for the RSC program, found on the installa­tion CD.

DELTA LTL-XL Retroreflectometer 37

SECTION 4

MAINTENANCE

General care

The LTL-XL retroreflectometer is constructed for outdoor use in ordinary good weather con­ditions. It will stand moist weather with wet roads, but caution must be taken against heavy
rain and dirt. The LTL-XL retroreflectometer is an optical instrument and shall be handled as
such. Avoid shock and vibration if possible.

Protection window

The protection window is accessible from underneath of the instrument. The protection win­dow is coated with a high-efficiency anti-reflection coating. Take care not to damage this
coating when cleaning. Compressed air or a fine brush can be used for removing loose parti­cles/dust. If this is not sufficient the window should by cleaned using a soft paper tissue or
cloth and some window cleaning liquid.

MAKE SURE THE PROTECTION WINDOW IS CLEAN AND UNDAMAGED AT ANY

TIME TO ENSURE CORRECT MEASUREMENT RESULTS

Battery

The LTL-XL retroreflectometer is equipped as standard with a 12V/2.1 Ah NiMH (Nickel­Metal Hydride) battery. A high capacity 12V/4.5 Ah NiMH battery may be installed as an op­tion to add more measurements on one charge. Under normal use, these batteries require no
maintenance. However it is recommended to keep the battery fully charged. A fully charged
battery is more capable of withstanding degeneration.

A mains powered 15V power supply for charging is supplied as customary delivery. The in­strument will automatically power on when the power adaptor is connected. The battery icon
in the upper right corner indicates the charging state.
The standard 2.1 Ah battery typically yields ~ 1,100 measurements when fully charged. The
charge time for the 2.1Ah battery is ~1½ hours.
The 4.5Ah battery typically yields ~2,500 measurements when fully charged. The charge time
for the 4.5Ah battery is ~3½ hours.

For “field” charging the 15V power supply could be powered from an “AC power inverter”
connected to the car battery.

When storing the instrument for a long period of time fully charge the battery.

THE BATTERY SUPPLIED WITH LTL-XL IS SPECIALLY DESIGNED FOR THE

INSTRUMENT TO ENSURE SAFE USE. IF A NON DELTA SUPPLIED OR APPROVED

BATTERY IS USED, DELTA CAN TAKE NO RESPONSIBILITY FOR ANY DAMAGES

CAUSED DUE TO THE PERFORMANCE OF THIS BATTERY.

38 LTL-XL Retroreflectometer DELTA

Replacing the battery

A depleted battery will not hold a charge very long, and it should be replaced. This can be
done by the user.

Notes:

The battery is located in a compartment at the low end of the rear of the tower. To replace the
battery, remove the screws from the back cover and remove the cover.
Loosen the big screw at the battery cover. You can now remove the cover

Lift the battery out of the compartment. Press the snap-on clip on the connector and carefully
withdraw it from the printed circuit board

The battery can now be removed and replaced. Refit in reverse order. Please check your local
regulation for disposal of the battery.

Always turn off LTL-XL before removing the battery to make sure that the
processor is shut down properly.
Disconnecting the battery for a longer period of time can reset the internal
clock in the instrument.

Always make sure the power supply is disconnected before removing the bat­tery.
Do not connect the power supply unless the battery is properly connected to
the circuit board.

DELTA LTL-XL Retroreflectometer 39

Battery status

The capacity of the battery can be seen from the icon in the upper icon row.
Indicates that the battery is fully charged

Shows that the charging is finished

Shows that charging takes place

Indicates that the capacity of the battery is half empty

The battery is almost empty and need recharging

Fuses

Two fuses are located in the battery compartment. The charger fuse protects the battery
against short circuit and other errors in the power supply or charging system.

The main fuse protects the battery and electronics against short circuit and other errors in the
electronic system. If the main fuse is removed no power will be drawn from the battery.

Always replace a blown fuse with one of equal rating See Electrical Characteristics pg. 46. To
change the fuses you need access to the battery compartment. See replacing battery pg. 38. Careful­ly unscrew the plastic cap fuse holder by using e.g. a coin. Pull out the fuse from the cap and
insert the new one and reassemble

Lamp

The lamps are maintenance free LED lamps. Only trained personnel should replace the lamps
if damaged.

Charger fuse

Main fuse

40 LTL-XL Retroreflectometer DELTA

Calibration unit

Reference

The road marking is simulated by a piece of white ceramic (the reference) mounted on an
aluminum profile. Ceramics have very stable optical properties because of the smooth surface.

Figure: 6 - Calibration unit

To make sure that calibration of the retroreflectometer is correct it is important that the ceram­ics on the calibration reference is clean and undamaged. Always keep the calibration unit well
protected.

If the ceramic is stained, scratched or broken, the calibration unit must be replaced. In case of
dust on the ceramics surface of the reference, the use of compressed air is recommended for
removal. The use of a soft damp cloth is recommended if compressed air fails to remove the
dirt. If necessary, use a mild household detergent.

Service

To ensure reliable measurements, it is recommended that the calibration unit be periodically
recalibrated to a traceable standard or replaced. DELTA offers calibration traceable to PTB
(Physikalsich-Technische Bundesanstalt, Germany) and NIST (National Institute of Standards
and Technology, USA).

For information in service please contact your distributor or DELTA directly. At DELTA you
can forward your request via our web-site www.roadsensors.com or send a mail directly to:
[e-mail].

DELTA LTL-XL Retroreflectometer 41

Calibration

The LTL-XL is factory calibrated and very stable but a calibration should always be carried
out before starting a new series of measurements. The instrument is supplied with a calibra­tion unit to carry out a fast and easy calibration.

Back Front

Calibration procedure

• Before mounting the calibration unit check the RL and Qd values stamped on the cal-

ibration unit. Place the instrument upon the calibration unit and pull back until the
pins at the back and front of the LTL-XL are in place, see figure 7. Please be very
careful when you place the instrument on the calibration plate not to damage the
calibration unit and / or the light diodes

Press the CALIBRATION button once. Select CALIBRATE RL or CALIBRATE QD.

Continue the calibration process applying the following steps

• Check the value displayed and if necessary adjust the calibration value shown in the

display so it matches the value stamped on the calibration unit.

Figure 7: Placing the calibration unit

42 LTL-XL Retroreflectometer DELTA

• Press the OK button to finish the calibration or repeat if erroneous.

• Repeat the calibration process for the other measure ( RL, Qd)

The calibration procedure is now complete. To check the calibration, make a normal meas­urement on the calibration unit. The recorded values should be with +/- 2-3 units of the values
stamped on the calibration unit. Remove the calibration unit and store it properly. Press OK to
return to the measurement display. For further details see pg. 41

The instrument automatically compensates for zero signals, leakage and other known errors,
and calculates a calibration factor.

Always store the calibration unit in a dry, dust free and clean environment.

If stained, scratched or broken it must be replaced.

DELTA LTL-XL Retroreflectometer 43

Printer (optional)

The printer is located at the back of the tower. The printer is a high-speed high quality mini
thermal printer. It has only a few moving parts and does not require any special or periodic
maintenance.

The printer uses a thermal paper roll, width: 57.5±0.5 mm (2.26 in), diameter: max. 31 mm
(1.22 in)

Replacing paper

Pull the lever out with your finger and the cover will open into the paper roll compartment.

Insert the new paper roll and let a short paper tail hanging out at the top. Close the cover with
a firm push and with some of the paper sticking out.

44 LTL-XL Retroreflectometer DELTA

Mounting the wheel unit (option)

A wheel unit can be mounted in the rear of the instrument for easy transportation during
heavy use.

The wheels are mounted easily to the rear
by fastening the two nuts mounted on the
wheel block.

Nuts for fasten the wheels

Figure: 8 – Wheel fastening nuts

DELTA LTL-XL Retroreflectometer 45

APPENDIX A

COMMUNICATION FACILITIES

The LTL-XL is equipped with a USB host port and a USB device port.

The USB host port can be used to connect to a USB memory stick, e.g. for software updates.

The USB device port is used to connect the instrument to a PC.

The ethernet connector is for test / service purposes.

RSC software program

Main features of the LTL RSC (Road Sensor Control) software program delivered together
with the LTL-XL:

• Transfer of logged data to a PC via the USB connection

• Export of logged data to other programs e.g. Excel

• Upload / download projects between PC and LTL-L

• Printing reports of the logged data

For more details see the separate user’s manual for the RSC program. This can be found on
the internet (www.roadsensors.com) or in the “documentation pack” with LTL-XL.

46 LTL-XL Retroreflectometer DELTA

APPENDIX B

SPECIFICATION

General characteristics

Illumination angle ............................................................................................................ 1.24º

Observation angle ............................................................................................................ 2.29º

Equivalent observer distance ........................................................................................... 30 m

Observation angular spread .......................................................................................... ±0.17º

Type 30m CEN

Illumination angular spread horizontal ........................................................................ 0.33º

Illumination angular spread vertical ............................................................................ 0.17º

Field of measurement:

Width ............................................................................................................ 50 mm (2.0 in)

Length (typ.) ............................................................................................... 185 mm (7.3 in)

RL range (mcd·m

-

2

·lx-1) ................................................................................................ 0-2000

Qd range (mcd·m

-

2

·lx-1) ................................................................................................ .0-318

Radio: ........................................................................................... EN 300440-1 V1.6.1:2010

EMC: ............................................... EN 301489-1 V1.8.1:2008, EN 301489-3 V1.4.1:2002

Safety : ...................................................... EN/IEC 60950-1 :2006, EN/IEC 60950-22 :2006

FCC: .................................................................................. 47 CFR, FCC Part 15B, Class A

Power supply:

Battery, standard ................................................................. Built in 12 volt / 2.1 Ah NiMH

Battery, high capacity ......................................................... Built in 12 volt / 4.5 Ah NiMH

External charger power supply .................... Friwo FW7530/15 (100-240 VAC / 15VDC )

Charging time, standard battery ...................................................... Approx. 1 hour 30 min

Charging time, high capacity battery .............................................. Approx. 3 hour 30 min

Charger fuse (5*20 mm) .......................................................................................... T3.15A

Power supply fuse (5*20 mm) ................................................................................. T3.15A

Data memory .................................................................................... >200.000 measurements

Data transfer ................................................................................................................ USB 2.0

DELTA LTL-XL Retroreflectometer 47

Environmental characteristics

Temperature:

Operating ........................................................................... 0ºC to + 45ºC (32ºF to +113º F)

Storage*) .......................................................................... -15ºC to + 55ºC (5º F to +131º F)

Humidity ......................................................................................... 85% and non-condensing

*)

Battery must be fully charged

Mechanical characteristics

Max. length ................................................................................................... 573 mm / 22.6 in

Max. width ...................................................................................................... 222 mm / 8.7 in

Max. height ................................................................................................... 538 mm / 21.2 in

Weight of base unit ............................................................................................ 7 kg / 15.5 lbs

Construction:

Structural parts .................................................................................................... Aluminum

Housing .................................................................................................................. Polymer

Keyboard ...................................................................................................... Silicone rubber

Circuit boards .................................................................................................... Epoxy glass

Printer:

Thermal paper ......................................width/dia. 57.5 ±0.5 mm / 31mm (2.26 in / 1.22in)

48 LTL-XL Retroreflectometer DELTA

APPENDIX C

DELIVERY