PN 9000-133-VE, Rev U
Overview
Analyzer Operations
Designed for fast response in a wide range of flue gas applications, the analyz-
er mounts directly on the combustion process to provide continuous measure-
ment of oxygen, or oxygen and combustibles, or oxygen, combustibles, and
methane.
A sample is drawn from the process stream by means of an air-operated aspira-
tor and is immediately returned to the process. A portion of this gas rises past
the oxygen measuring cell and combustibles detector and returns to the pri-
mary loop. All sample wetted parts are heated to 200 °C maintain the sample
above the dewpoint of the gas.
Follow these cautions when working on the analyzer:
Do not turn on the aspirator until the analyzer has been turned on
and is hot – preferably 24 hours. Also, if you turn off the analyzer or
the process is shut down, turn off the aspirator air to avoid plugging
problems.
Remove AC power from the analyzer and allow it to cool for at least
90 minutes before performing any maintenance or troubleshooting
activities.
The outside of the analyzer cover and all analyzer assembly com-
ponents are hot during normal operation (up to 260 °C/500 °F
inside the cover). Allow analyzer components to cool for at least 90
minutes before working inside the analyzer. Use caution and wear
appropriate gloves when handling components or when touching
the analyzer cover.
Overview
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