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The SEL10 lamphead requires very little maintenance to keep it in good working order. Cleanli-
ness is the most important element.
The reflector should be cleaned periodically with a soft, clean, lint free cloth to remove any
dust from the reflecting surface. If excessively soiled, use of a mild commercial glass cleaner (Windex
or equivalent) is acceptable; USE NO ABRASIVE CLEANERS.
The xenon bulb should be checked occasionally for the presence of foreign material on the
envelope. Any dirt or other foreign material should be removed promptly. Use only alcohol and a
clean cloth to clean the bulb; rinse with distilled water and dry carefully. DO NOT touch the bulb with
bare fingers, and observe all safety procedures when working around the bulb.
The inside of the lamphead and the impeller blades of the blower should be cleaned periodi-
cally, depending on the dust conditions at each installation. Although the blower motor may have oil
ports, the bearings are factory sealed and require no lubrication.
Check all electrical connections periodically for tightness, especially the DC leads at the xenon
bulb and igniter.
Follow the instructions on Page 10 regarding periodic bulb rotation. After rotating a bulb,
increase current to the maximum allowable level, and operate the bulb at this level for 10 to 12 hours.
This period will re-excite the thorium in the cathode tip and allow the new arc pattern to establish.
After the 10 or 12 hours, return the current setting to its previous level.
Always allow the lamphead blower to operate for at least ten minutes after extinguishing the
bulb. Failure to do so will shorten bulb life.
ALLOW THE LAMPHEAD to cool, with all blowers operating, for at least (20) minutes before opening.
Normal Operation:
The lamphead blower will start when the generator first supplies power to the SEL10. When the
control panel SYSTEM switch S1 is in the "ON" position, the power supply blowers will start, and the AC
circuit to the xenon power supply will energize the circuitry necessary to supply DC voltage to the
igniter and bulb.
The DC open circuit ("no load") voltage will be detected by the igniter printed circuit board,
which in turn will close the circuit to the igniter. There will be an audible high voltage arc ping at the
spark gap in the igniter and at the xenon bulb. The bulb should ignite immediately after one or two of
these high voltage pulses, and the lamp current will adjust to the sustaining level set at the xenon
power supply. The STRIKE switch may be pressed to override a defective igniter PC board.
A reed switch mounted to a printed circuit board tie-wrapped to a DC output cable in the
xenon power supply will detect current flow and complete a circuit to the elapsed time meter. The
elapsed time meter will record the unit's hours of operation.
Troubleshooting:
If the xenon bulb does not ignite, observe the following operational sequences for assistance in
locating and isolating the trouble area.
When the three phase indicator lights are "ON," the AC circuit in the power supply is trouble
free up to the terminal block (L1, L2, L3) in the power supply. Check the 230 V.AC control circuit at the
blower leads at terminals #2 and #3.
18
LAMPHEAD MAINTENANCE
LAMPHEAD TROUBLE CHART
®
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