Specifications

DELTA LTL-XL Retroreflectometer 37
SECTION 4
MAINTENANCE
General care
The 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 win-
dow 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 parti-
cles/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 powered by a 12V/2.1 Ah NiMH (Nickel-Metal Hydride)
battery. Under normal use, this battery requires no maintenance. However it is recommended
to keep the battery fully charged. A fully charged battery is more capable of withstanding de-
generation.
A battery charger power supply is provided as a standard accessory for charging the battery
from mains. The output cable of the charger is equipped with a connector matching the con-
nector in the instrument. Connect the charger to an outlet and the instrument. If the instrument
was turned off it will automatically power on when the charger is being connected. The bat-
tery icon in the upper right corner will also indicate the charging state.
No harm will result from leaving the charger connected after the charging process. However,
the instrument must be disconnected from the charger when disconnecting the battery from
the wall outlet. In addition, the battery can be charged using any DC supply from 12-18 V.
such as a car battery by using an inverter or the 12V charger supplied by DELTA (optional).
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 WITH LTL-XL DELTA CAN TAKE NO RESPONSIBILITY FOR
ANY DAMAGED CAUSED DUE TO THE PERFORMANCE OF THIS BATTERY.