EC155 CO
2
and H
2
O Closed-Path Gas Analyzer
38
5.
Now with the vortex chamber open on both sides, use a rolled up piece of
damp cloth or damp paper towel to floss back and forth through the vortex
chamber. If the chamber has been contaminated with organic particulates,
the cloth or paper towel may be dampened with isopropyl alcohol. Make
sure to floss at various angles to ensure all internal surfaces are wiped
clean. See FIGURE
Do not use anything abrasive to clean out the vortex
chamber, as scratching the internal surface may lead to
decreased performance of the vortex.
FIGURE 9-4. A damp paper towel or cloth used to floss and clean
inside surfaces of vortex chamber
6.
To clean out the intake sample tubing, turn on the pump and plug the ends
of the intake sample tubing (the small stainless steel tube) and the bypass
tubing with fingers. After approximately one minute, when a relatively
strong vacuum has developed, quickly release the end of the intake sample
tubing. The burst of air flowing through the tube will help clear out any
debris into the sample cell.
7.
Repeat this step until the windows no longer become dirtier (CO2 and
H2O signal levels do not change), indicating that no more dust is being
removed from the intake sample tube. When finished, turn off the pump. If
this procedure does not adequately clean the intake tubing, the intake
assembly may be detached and flushed out with air or a solvent such as
water or a water-alcohol solution. See Appendix
(p. C-1)
, for details on detaching the intake and cleaning it.
During this step, ambient air will rush in and blow dust from the
inner walls of the intake tube, which is likely be deposited on the
analyzer windows. For this reason, Campbell Scientific
recommends performing the dust blowout prior to cleaning
windows.
CAUTION
NOTE
Содержание EC155
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