34
Resetting the Burner Hour Counter
Fig. 14
Fig. 15
1. Press the center section @ of the reset button ² on the power supply
unit’s front panel to reset the hour counter to 000.0.
}The hour counter shows elapsed time in hours. The service life of a
burner is 300 hours. For safety’s sake, replace the burner when the hour
counter indicates 300.0 hours.
Mercury Burner Replacement
1. In order not to impair the safety of the equipment, replace the burner
when it has been used for 300 hours. The burner may crack if used
beyond the specified life time.
When the end of the burner’s service life is near, flickering is likely
to increase. It is therefore recommended to replace the burner
according to the purpose of observation.
* This value assumes light cycles composed of 2 hours of lighting
and 30 minutes of extinction (with the USH-103OL). Do not turn it
on and off at a shorter cycle than the above, for this will shorten the
service life of the burner.
2. Before replacing the burner, wait at least 10 minutes or until the
lamp and lamp housing have cooled down after turning the burner
off. Before removing the burner, confirm that the main switch on the
power supply unit is “
” (OFF) and unplug the connecting cord
plug from the output connector on the power supply unit. Refer to
page 33 for details on replacement procedure.
3. After replacing the burner, reset the hour counter to 000.0 as out-
lined above.
@
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