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16-10-200716-10-2007
2. SYSTEM DESCRIPTION
2
SYSTEM DESCRIPTION
The Brewer MKIV Spectrophotometer is an optical instrument designed to measure ground-level
intensities of attenuated solar radiation in either the UV or the Blue spectral region. The Brewer
contains a modified Ebert f/6 spectrometer, utilizing a 1200 line / mm holographic diffraction
grating, operated in the second order for UV and third order for the visible measurements.
The Brewer is designed for continuous outdoor operation and is therefore housed in a durable
weatherproof shell which protects the finely-tuned internal components. The instrument operates
reliably and accurately over a wide range of ambient temperature and humidity conditions.
Following is a brief description of the the major mechanical, optical, and electronic assemblies
which make up the basic instrument. A more complete description of the electronic assemblies is
provided in the Brewer Service Manual.
The Brewer system is comprised of a Spectrophotometer, a Solar Tracker, and Computer
equipment running control and data logging software.
Figure 2.1: Top View of Brewer Cover
MKIV OPERATOR'S MANUAL
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