Xenotech BL7000, Operating Manual

Page: 12 / 38

PAGE 12
OUTPUT POWER ADJUSTMENT PROCEDURES
EQUIPMENT REQUIRED
1. Phillips screwdriver #2 3. Clamp-On DC Ammeter
2. Flat-blade screwdriver, large 4. Volt/Ohm Meter
ADJUSTMENT INSTRUCTIONS
1. Remove the top cover of the P3 by loosening the (12) slot head screws and lifting the cover off.
2. Locate the heavy DC leads (red & black) connected to the MS receptacle at the bottom of the
lamp head rear panel. Clamp (1) of the leads with the DC ammeter.
3. Turn on the power supply and ignite the lamp. Exercise all due caution taking readings in a "Power
ON" condition!
4. Using the ammeter, measure the output current of the power supply.
5. If the power level is over 160 amperes, immediately turn off the light and decrease DC output (see
Xenon Power Supply Manual)
6. If the power level is less than 140 amperes, allow the light to run at least 5 minutes before making
any adjustments.
7. If the power level is at or near 150 amperes and the output current is less than 155 amperes, no
adjustment is necessary.
8. Measure the DC voltage while the bulb is operating. A 7000 watt bulbs should display an arc
voltage of 43-49 volts DC. A voltage reading below this level, particulary in the presence of a high
current reading, may indicate a leaking bulb.
9. It is not unusual for the quartz envelope of the xenon bulb to darken after prolonged operation. To
compensate for the loss of light, the DC output may be increased as the xenon bulb ages. DO NOT
exceed the bulb manufacturer's maximum rated current level (usually 160 amperes). See the test
documents packaged with the xenon bulb.