EC150 CO
2
/H
2
O Open-Path Gas Analyzer
4
4.5 Field Zero/Span Capabilities
A zero/span for CO
2
and H
2
O can be accomplished in the field with an
optional shroud. The shroud allows the flow of a gas with known composition
in the measurement path of the analyzer to account for instrument drift and
changing environmental conditions.
4.6 EC100 Electronics Module
The EC100 electronics module (shown in FIGURE
) controls the EC150
and optional CSAT3A sonic anemometer head. The EC100 synchronizes
measurements and processes data from the EC150 and the CSAT3A.
FIGURE 4-1. EC100 electronics module
4.6.1 EC100 Communications and Control
The EC100 supports several serial communication interfaces, including USB,
RS-485, and Synchronous Device for Measurement (SDM). SDM is a
Campbell Scientific communication protocol that allows synchronized
measurement and rapid communication between a Campbell Scientific
datalogger and multiple devices including the EC150. Although nearly all
Campbell Scientific dataloggers support SDM, only the CR6, CR1000X,
CR1000, CR3000, and CR5000 dataloggers support communications with the
EC100 electronics with the
EC100()
instruction.
The SDM protocol allows the user to configure and control the analyzer
through
CRBasic
instructions in the datalogger. For example, in solar-powered
applications with limited daylight, battery power can be conserved by
programming the datalogger to turn off the EC150 at night or when conditions
are not suitable for eddy-covariance measurements. The datalogger can also be
used to change settings such as bandwidth, and perform the zero/span
procedure in the field.
Summary of Contents for EC150
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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 ...
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