Delta LTL2000S Specifications Page 34

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DELTA LTL2000 Retrometer 28
SECTION 4
MAINTENANCE
General care
The Retrometer 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
LTL2000 Retrometer 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, see Appendix C - figure 23. 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 LTL2000 Retrometer 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 temperature 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 instrument. 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 8-12 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 remove 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 renewed. Refit
in reverse order.
Keep dust/protection window and light trap clean
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