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Installation, Operation, and Maintenance Manual # 509252 Rev R 149
Appendix F. Ignitor Bulb
NOTE: This appendix applies to lamps manufactured before July 1, 2002.
Ignitor
The ignitor bulb is designed to provide positive instant ignition of the main bulb. As
shown in Figure 58, the ignitor is a UV bulb with a probe which projects into the
waveguide. The instant the magnetron is energized, the probe intercepts enough
energy to ionize the ignitor bulb, creating a small amount of UV radiation which
reliably causes ignition in the main bulb. When the main bulb is at full power, the
energy level in the ignitor is reduced, prolonging the life of the bulb.
Figure 58. Ignitor Bulb
TEFLON
TUBING
18 GA. ID
TEFLON
TUBING
13 GA. ID
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