Revision 14
158 August 02, 2019
Figure 7-7: Location of Cap for Furnace Leak Check
k) Analysis the flow on the hydrogen and sample rotameters on the sample conditioning
system. If there is a good seal in the furnace, the flow on both rotameters should drop to
zero within 1 minute.
l) If the flow does not drop to zero, use liquid leak detector (e.g. Snoop) to check all
external fittings for leaks. If there are none, remove the end caps from the furnace
enclosure and ensure that all the fittings on the four ultra-torr elbows inside the
enclosure, especially the two on the reaction tube itself, are as tight as possible. Again,
be careful not to break the tube while tightening the fittings.
m) Once the leak has been fixed, replace the end caps, remove the cap, and reattach the
sample line to the top of the flame arrestor. Ensure that this fitting is tight.
n) Restore power to the analyzer and begin normal operation.
o) Reset the Furnace Pulse Width to the original setting.
7.7 Adding Acetic Acid to the Humidifier
Remove the plug from the top of the humidifier. Fill the humidifier to the line on the front of
the humidifier with the 5% Acetic Acid solution. Once filled, replace the plug and place the
humidifier into the analyzer chassis, behind the lower door. Connect the two Tygon sample
lines to the two barbed connectors on the top of the humidifier.
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