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Lamp Power Supply Board
The lamp power supply controls the deuterium and tungsten lamps. In addition, it
supplies power to the variable speed fan that cools the optical bench.
NOTE The fan speed is controlled automatically. Changes in
SHOCK HAZARD—Components used to ignite and operate the
deuterium lamp are at high potentials.
DANGER D'ÉLECTROCUTION—Les composants utilisés pour allumer
et faire fonctionner la lampe au deutérium sont à des potentiels
élevés.
STROMSCHLAGGEFAHR—Die
Betreiben der Deuteriumlampe führen Hochspannung. Der Service
darf nur von qualifiziertem Personal durchgeführt werden.
Preamp Board
The photodiode array is connected directly to the preamplifier. The preamp gain is
automatically adjusted to compensate for system variables such as lamp intensity.
Analog-to-digital conversion of the signal occurs on the Preamp board. Preamp
output is directed to the Data Processing board.
Data Processing Board
The Dionex PDA Moduleware resides on the Data Processing board. This board
provides the digital signal processing and conversion to log ratios when
absorbance is measured.
Also located on the Data Processing board are the connectors for USB and
TTL/relay communications, as well as four BNC connectors that provide the
analog (recorder) outputs.
Doc. 065378-01 1/12
fan speed may be audible, especially when the lamp
selection is changed or the ambient temperature
fluctuates.
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