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DELTA LTL2000S(Q) Retroreflectometer 25
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 rain or splashes
and dirt from traffic. The LTL2000S(Q) Retroreflectometer is an optical instrument and shall
be handled as such. Avoid shock and vibration if possible.
Note
Protection window
The protection window is located in the optical unit. The protection window is coated with a
high efficiency anti reflection coating. Care must be taken not to damage this coating by
cleaning. 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.
Battery
The LTL2000S(Q) Retroreflectometer is powered by a sealed 12V/3.5Ah lead acid battery,
which under normal use requires no maintenance. However it is recommended to keep the
battery fully charged. A fully charged battery is more capable of withstanding low tempera-
ture and ageing.
Battery charger is provided as a standard accessory for charging the battery from mains. The
output cable of the charger is equipped with a socket matching the connector in the instru-
ment. Connect charger to mains and instrument. The red indicator will be switched on as long
as the charging is in progress. Thereafter it switches periodically on and off. Normally the
charging will take about 8 hours. Typically the battery achieves 90% of the capacity in 5
hours. No harm will result from leaving the charger connected for time in excess of the above
indicated duration of the charging process. However, the battery must be disconnected from
the charger when disconnecting the mains.
The battery is located in a compartment at the front of the tower. To replace the battery re-
move the screws holding the right side cover plate, seen from behind. Remove the screws
from the right hand side of the red front- and back cover plate. Remove the side cover plate.
Remove the 2 nuts holding the clamp plate. Lift out the battery of its container. The battery
can now be removed and replaced. Refit in reverse order.
Keep dust/protection window and light trap clean