Uv Source Lamp; Figure 12-2: Uv Light Path - Teledyne t100 Operation Manual

Teledyne API - T100 UV Fluorescence SO Analyzer Principles of Operation
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Figure 12-2: UV Light Path
12.1.3.

UV SOURCE LAMP

The source of excitation UV light for the T100 is a low pressure zinc-vapor lamp. An
AC voltage heats up and vaporizes zinc contained in the lamp element creating a light-
producing plasma arc. Zinc-vapor lamps are preferred over the more common mercury-
vapor lamps for this application because they produce very strong emission levels at the
wavelength required to convert SO to SO *, 213.9 nm (refer to Figure 12-4).
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The lamp used in the T100 is constructed with a vacuum jacket surrounding a double-
bore lamp element (refer to Figure 12-3). The vacuum jacket isolates the plasma arc
from most external temperature fluctuations. The jacket also contains thermal energy
created by the lamp's operation therefore helping the lamp to heat up and maintain
proper vaporization temperature. Light is emitted through a 20 mm x 5 mm portal.
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06807F DCN7335