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18 F300S/F300SQ Ultraviolet Lamp System
Cooling
Proper operation of the lamp requires adequate cooling of the magnetron and the bulb.
(See Appendix C, page 129, for irradiator cooling requirements.) Cooling air from a
blower goes through the magnetron cooling fins and into the lamp housing. At this
point, the airflow splits into two paths: one path exhausts through the irradiator
housing vent holes, and the rest of the air flows into the cavity through cooling holes
in the reflector. This airflow cools the bulb and exhausts through the RF screen.
Irradiators
The I300M irradiator family is the heart of the UV system. For example, the model
I300M contains both the 15.2 cm (6") long electrodeless lamp bulb mounted in the
elliptical reflector and the magnetron which energizes the bulb. The reflector is
elliptical in cross-section and the lamp bulb is mounted at the focus of the ellipse,
producing an intense strip of light at the other focus of the reflector (53 mm [2.1"]
below the bottom rails of the lamp).
Figure 2. Reflector Assembly
M3 screen retaining
screws (4) (2 per side)
RF screen
Cooling air holes
Lamp bulb
Cavity
Reflector