GE MOA 280i, Operation And Maintenance Manual

Page: 157 / 211

GE Analytical Instruments ©2006
13-15
DLM 14291 Rev. A
Figure 13-2: Cleaning the Purge Vessel Frit.
•
After cleaning the frit, replace the reducing union on the outlet of the
purge vessel. Tighten the 1/4" nut fingertight. Do not use a wrench to
tighten the nut; the glass will break if the nut is overtightened (see
Procedure for Tightening Swagelok Fittings page 11-4).
Cleaning the Gas Bubbler
The gas bubbler should also be cleaned after running samples or whenever the
VCl
3
/HCl reagent gets into the bubbler. To clean the bubbler:
•
Follow the procedures listed above to open the gas bubbler and remove the
Swagelok unions on the inlet and outlet of the bubbler.
•
Remove the green clamp and twist the bubbler’s top to open the bubbler.
•
Discard the NaOH and rinse the bubbler bottom thoroughly with water.
•
To clean the frit, close the bubbler stopcock, fill the bubbler bottom with
water, point the bubbler away from you and quickly immerse the top into
the water. The water will be forced into the frit and squirt out the bubbler
inlet tubing.
•
Repeat this process several times to remove any material inside the frit and
tubing.