6-6 | Model 241CE II Hydrocarbon Dewpoint Analyzer
Changing Out Replaceable Parts
The following sections discuss parts that should be replaced, as per the
“Analyzer Preventive Maintenance Schedule.”
Performing preventive maintenance on the analyzer requires
working from the User Interface. Familiarize yourself with how
to work from the User Interface before working on the analyzer
(see Chapter 4).
Cleaning or Replacing the Sample and Vent Lines
The Sample and Vent Lines should be inspected periodically, and any
time problems associated with the analyzer’s measurements may be in
question.
Generally, it is not necessary to clean the Sample and Vent Lines. However,
if there are liquids present in the lines, purge the lines with a dry gas or
instrument air.
Determining whether cleaning or replacing the line is necessary will
depend on the design of the Sample Line, and the availability of replace-
ment tubing and/or a cleaning medium. Example, replacing an unheated
Sample Line may be more practical than cleaning it. Cleaning the Sample
Line with steam may work if the contaminant is water soluble.
Whether cleaning or replacing the line, always purge the line with a dry
gas before reconnecting it to the analyzer.
Generally, it is necessary to replace the sample lines if the Sample or Vent
Lines are found to be sagging, have been bent, or show damage to the
outer skin.
For tools and supplies required to replace the Sample/Vent Lines, see
“Tools, Equipment, and Supplies Required” in Chapter 3. If cleaning is
required, use Isopropanol or another similar non-abrasive cleaning agent.
NOTE
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