Campbell Scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer User Manual

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EC155 CO

and H

O Closed-Path Gas Analyzer

b. Unscrew the large metal plug found at the base of the analyzer next to the

analyzer cable; it should only be hand-tight (see FIGURE 9-7). Once the

plug is removed, tip the analyzer up so the desiccant/scrubber bottle falls

out. Insert a new bottle lid-first into the analyzer. Firmly screw the plug

back in place.

c. On the other end of the analyzer, remove the two seal-screws from the

metal cap (see FIGURE 9-8). Carefully pull the cap off. Tip the analyzer

up so the desiccant/scrubber bottle falls out. Insert a new bottle lid-first.

Push the cap back on, and use two new seal-screws (included with

replacement desiccant/scrubber bottles) to hold the cap in place.

While the metal cap is removed, avoid touching the detector

and its electronics.

d. Insert the analyzer back into place, making sure to latch the analyzer’s

struts down. Do not operate the analyzer for at least 24 hours (longer if in

humid environments) to give the chemicals time to purge the air inside the

analyzer. A zero-and-span procedure should then be performed before

resuming measurements.

The scrubber bottles contain strong oxidizing agents. Avoid

direct contact with the chemicals inside the bottles. Also

ensure your work area is well ventilated and free of any

reactive compounds, including liquid water. Store used

chemical bottles in a sealed container until disposal.

The chemical bottles should be disposed of according to local and federal

regulations. For more information, MSDS (Material Safety Data Sheet) forms

for the chemicals are included in Appendix D.

FIGURE 9-7. Replacing the source housing desiccant/scrubber bottle

CAUTION