Agilent Technologies 8453 Operator's Manual page 135

Uv-visible spectroscopy system

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Table of Contents

spectrophotome-

ter main power

Theory of Operation

Electronics Overview

Electronics Block Diagram

spectrophotometer processor

spectrophoto-

spectrophotometer

sipper interface

The spectrophotometer includes a spectrograph which utilizes a

processor-controlled photodiode array. Several processing steps and

hardware boards are required to form spectra from the intensity counts

derived from the diode array. Full spectra can be acquired, processed and

transmitted every 0.1 s continuously, the only bottleneck being the PC speed.

The instrument has its own onboard real-time clock and this allows the

instrument to perform a series of time-based accessory control actions and

spectrophoto-

data acquisition

spectrograph

SCI spectrograph

connector interface

photodiode array

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