Thermo Scientific Mercury Freedom 80i, Руководство пользователя

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Introduction
Model 82i
Thermo Fisher Scientific Mercury System Manual 1-5
Clean, dry, pressurized (~85 psig) air feeds two electo/pneumatic pressure
transducers which adjust and maintain output pressure to the Model 83
i
probe eductor and blowback pneumatics (
Figure 1–3
).
Pressurized (~85 psig) Hg-free zero air or nitrogen feeds a third
electo/pneumatic pressure transducer which adjusts and maintains dilution
gas pressure to the Model 83
i probe dilution module.
Three electronic pressure transducers (
Figure 1–3
) associated with the
individual regulators are also contained within the Model 82 i , as well as an
electronic vacuum transducer monitoring the dilution module vacuum in
the Model 83
i .
Figure 1–3.
Model 82 i Probe Controller Flow Diagram
The Model 82 i communicates with the Model 80 i via a RS-485 link. The
Model 80 i acts as the master component in the Mercury Freedom
™
System with both the Models 81 i and 82 i slaved to the analyzer. All
commands are initiated by the Model 80 i . The Model 82 i receives
commands and sends information to the analyzer.
The Model 82 i also receives two 4-20 mA signals from the probe critical
orifice pressure transducer and the fast loop venturi pressure transducer.
Pneumatics
Electronics