EC150 CO
2
/H
2
O Open-Path Gas Analyzer
32
8.2 Gas Analyzer Wicks
The windows of the EC150 gas analyzer are polished and slanted at an angle to
prevent water from collecting on their surfaces. However, due to increased
surface tension at the interface with the snout, water can pool at the edges and
partially block the optical path and attenuate the signal. To minimize the
occurrence of such events and the resulting data loss, consider using the wicks
listed in TABLE
. The weave of the wicking fabric promotes capillary
action that wicks the water away from the edge of the windows. The seam and
the straight edge of the wicks are permeated with a rubberized compound to
prevent them from shifting during operation.
Proper installation of the wicks is critical. They should not block or encroach
on the optical path. Before installation, record signal strengths for both H
2
O
and CO
2
. Following installation, repeat testing of signal strength and check that
these values are unchanged.
TABLE 8-1. Rain Wick Replacement Parts
Wick
Campbell Scientific, Inc.
Part Number
Campbell Scientific, Inc.
Description
Bottom wick
28652
Fab EC150/IRGASON
rain wick bottom
Top wick
28653
Fab EC150/IRGASON
rain wick top
The top wick has a short seam which must be aligned with the short side of the
top snout. The angled edge of the wick must closely follow the edge of the
window without encroaching on the optical path. See FIGURE
guidance on proper positioning of the wick.
The bottom wick is installed in a similar manner, except the long seam should
be aligned with the long side of the bottom snout. Once in place, the wicks
should fit snuggly over the cylindrical part of the snout without any creases or
wrinkles. The windows should be cleaned after the installation of the wicks to
ensure that there are no fingerprints left on critical surfaces. See Section
(p. 33)
, for specifics on cleaning the EC150
windows.
Wicks are constructed with a UV-resistant fabric and should be functional for
an extended period of time but should be inspected every six months. Check
for contamination from dust, pollen, pitch or other debris. If needed, wash the
wicks in warm water with mild detergent or replace them.
Summary of Contents for EC150
Page 2: ......
Page 3: ......
Page 7: ......
Page 67: ...Appendix B Filter Bandwidth and Time Delay B 4 ...
Page 75: ...Appendix D Useful Equations D 4 ...
Page 76: ...E 1 Appendix E Safety Data Sheets SDS E 1 Molecular Sieve Type 13X ...
Page 77: ...Appendix E Safety Data Sheets SDS E 2 ...
Page 78: ...Appendix E Safety Data Sheets SDS E 3 ...
Page 79: ...Appendix E Safety Data Sheets SDS E 4 ...
Page 80: ...Appendix E Safety Data Sheets SDS E 5 E 1 Magnesium Perchlorate ...
Page 81: ...Appendix E Safety Data Sheets SDS E 6 ...
Page 82: ...Appendix E Safety Data Sheets SDS E 7 ...
Page 83: ...Appendix E Safety Data Sheets SDS E 8 ...
Page 84: ...Appendix E Safety Data Sheets SDS E 9 ...
Page 85: ...Appendix E Safety Data Sheets SDS E 10 ...
Page 86: ...Appendix E Safety Data Sheets SDS E 11 ...
Page 87: ...Appendix E Safety Data Sheets SDS E 12 E 2 Decarbite ...
Page 88: ...Appendix E Safety Data Sheets SDS E 13 ...
Page 89: ...Appendix E Safety Data Sheets SDS E 14 ...
Page 90: ...Appendix E Safety Data Sheets SDS E 15 ...
Page 91: ...Appendix E Safety Data Sheets SDS E 16 ...
Page 92: ...F 1 Appendix F Packing Information F 1 EC150 GH Packing Information ...
Page 93: ...Appendix F Packing Information F 2 F 2 EC150 SH Packing Information ...
Page 94: ......
