Yokogawa Extractive Oxygen Gas Analyzer TDLS220 - Manual (Page 55)

<7 ROUTINE MAINTENANCE> 7-2
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
Mirror Removal for Cleaning or Replacement:
Follow the precautions outlined in the “Thermal hazard” and “Chemical hazard” sections of the SAFETY
chapter. If the flow cell becomes contaminated then it may be cleaned using the following procedure:
• discontinue the process gas flow and initiate nitrogen (or instrument air) purge of the
analyzer.
• shut down the analyzer and disconnect from AC power supply. Wait 30 minutes to let the
gas cell cool down to safe temperature.
• If installed, remove the flow cell insulation end cap as shown below.
Potentially HOT SURFACES on heated or insulated flow cells
• Using 7/64” Allen key wrench remove the four fastening screws and
lock washers.
Figure 17 - Mirror and Window Locations