Yokogawa In-Situ Gas Analyzer TDLS200 - Manual (Page 90)

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IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<6. BASIC OPERATION>
The following graph illustrates an example. At 800 degC, there are two oxygen absorption peaks, and their ratio
is 8.6. At 1500 degC, the left oxygen absorption peak increases while the right peak drops significantly. The peak
ration is 2.2. So by calculating the peak ratio of these two oxygen peaks, the gas temperature can be predicted.
The requirements for accurately predicting process gas temperature with high temperature oxygen
analyzers:
• Gas temperature should be higher than 750˚C so it’s ideal for combustion zone gas applications (typical
measured range 750-1,500˚C or 1380-2,730˚F).
• It needs sufficient oxygen absorption so longer path length and/or higher oxygen levels are preferred – contact
Yokogawa Laser Analysis Division with application details
6.9 Controlling the Analyzer Remotely or Locally via external PC/Laptop
A number of methods are available to connect to the TDLS200 analyzer.
• Direct Access with optional Keypad and Display
• Direct Access using VNC and an external computer (Ethernet)
• Remote Access using VNC via network (external computer)
• Remote Access using optional Remote Interface Unit (RIU with VAC software)
Whether directly connected, or connected via network, operating the analyzer with an external connection allows
two basic functions:
• Remote control of the analyzer via TDLS200 software allows full control of the analyzer. The user will see the
same screen with the same access functions as if controlling using a built in keypad and display.
• Data transfer via VIRTUAL ANALYZER CONTROLLER (VAC) software allows download
of data files to/from the analyzer.
Figure 54