1
EC155 CO
2
and H
2
O Closed-Path Gas
Analyzer
1. Introduction
The EC155 is an in-situ, closed-path, mid-infrared absorption gas analyzer that
measures molar mixing ratios of carbon dioxide and water vapor, along with
sample cell temperature and pressure. The EC155 may be used in conjunction
with the CSAT3A sonic anemometer, which measures orthogonal wind
components and sonic temperature.
Before using the EC155, please study:
•
(p. 1)
•
(p. 2)
•
(p. 10)
More details are available in the remaining sections.
In January 2016, new versions of the EC155 sample cell and
CSAT3A sonic anemometer were released. An EC155 with the
new sample cell has a serial number of 2000 or greater and may
easily be recognized by the vortex intake and the yellow label on
the sample cell cable (the older version has a white label on the
cable). Throughout the manual, the new version is often referred
to as the “sample cell with vortex intake” or more simply as the
“vortex sample cell”.
The new version of CSAT3A has a serial number of 2000 or
greater and is most readily recognized by the narrower mounting
stem, instead of the old block style. Although the operation of the
old and new designs is the same, there are some differences in
features and mounting covered in this edition of the manual.
2. Precautions
•
DANGER:
o
The scrubber bottles in EC155 instruments shipped prior to July
2017 contain sodium hydroxide (NaOH) and anhydrous
magnesium perchlorate (Mg(ClO
4
)
2
). If you are handling or
exchanging the scrubber bottles (see Section
EC155 Desiccant/CO2 Scrubber Bottles
), use the following
precautions. Beginning in July 2017, EC155 instruments ship
with a 13X molecular sieve instead.
Avoid direct contact with the chemicals.
Ensure your work area is well ventilated and free of
reactive compounds, including liquid water.
Store used chemical bottles in a sealed container until
disposal.
Dispose of chemicals and bottles properly.
Safety Data Sheets (SDS) are provided in Appendix
. SDS are updated
periodically by chemical manufacturers. Obtain current
NOTE
Summary of Contents for EC155
Page 78: ...E 1 Appendix E Safety Data Sheets SDS E 1 Molecular Sieve Type 13X ...
Page 79: ...Appendix E Safety Data Sheets SDS E 2 ...
Page 80: ...Appendix E Safety Data Sheets SDS E 3 ...
Page 81: ...Appendix E Safety Data Sheets SDS E 4 ...
Page 82: ...Appendix E Safety Data Sheets SDS E 5 E 2 Magnesium Perchlorate ...
Page 83: ...Appendix E Safety Data Sheets SDS E 6 ...
Page 84: ...Appendix E Safety Data Sheets SDS E 7 ...
Page 85: ...Appendix E Safety Data Sheets SDS E 8 ...
Page 86: ...Appendix E Safety Data Sheets SDS E 9 ...
Page 87: ...Appendix E Safety Data Sheets SDS E 10 ...
Page 88: ...Appendix E Safety Data Sheets SDS E 11 ...
Page 89: ...Appendix E Safety Data Sheets SDS E 12 E 3 Decarbite ...
Page 90: ...Appendix E Safety Data Sheets SDS E 13 ...
Page 91: ...Appendix E Safety Data Sheets SDS E 14 ...
Page 92: ...Appendix E Safety Data Sheets SDS E 15 ...
