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Infrared Gas Analyzer Maintenance
Teledyne Analytical Instruments 97
Figure 4-4: IR Window Assembly
Note: If the window or the cell interior is very dirty, gently wipe it
using a soft cloth moistened with absolute alcohol. A
slightly corroded infrared transmission window/sample cell
can be remedied by gentle rubbing with chromium oxide
powder on a cleani cloth but if excessively corroded, it
must be replaced. Do not use excessive force when
cleaning the window.
Reinstall the cell after cleaning. Be sure to perform an optical zero
adjustment (Section 4.4) and moisture interference compensation
adjustment (Section 4.5) prior to analysis.
4.3.2 Cleaning the Cell Block
1. Turn off the power switch, stop the sample gas, and allow
the zero gas to flow for several minutes to purge the cell
interior.
2.
Loosen the 2 setscrews that secure the top cover and
remove it.
3.
Remove the internal gas inlet tube.
4.
Loosen the 2 detector set bolts. See Figure 4-5.
Note: The gas distribution block, cell block, and detector are
fastened by the same bolts.