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EC150 CO
2
/H
2
O Open-Path Gas Analyzer
35
8.6 Factory Recalibration
When the EC150 is manufactured, it goes through an extensive calibration
process, covering a wide range of temperatures, pressures, and gas
concentrations. All CO
2
calibration gases used in this process are mixtures of
CO
2
in ambient air that are traceable to the WMO Mole Fraction Scale
maintained by the Central Carbon Dioxide Laboratory and the Carbon Cycle
Greenhouse Gases Group of the Global Monitoring Division/National
Oceanographic and Atmospheric Administration in Boulder, CO, USA.
The long-term calibration stability of the EC150 is achieved by the use of high
quality optical and electrical components, a long lasting IR source, and a stable
MCT detector. The subtle, long-term aging effects are usually compensated by
the user with the field zero-and-span adjustments which bring the performance
of the analyzer within the original specifications. Proper handling and regular
maintenance of the instrument should make factory recalibration unnecessary
in most applications. If zero and span accessories and calibration standards are
not available, Campbell Scientific can provide two-point calibration upon
request (pn 27312).
However, if a user finds that signal strength outputs of greater than 0.75 cannot
be achieved after both cleaning the windows and a subsequent zero-and-span
procedure, contact Campbell Scientific. Contact Campbell Scientific to help
determine if the instrument should be returned to Campbell Scientific for a
factory recalibration.
For the CSAT3A, refer to the CSAT3 instruction manual for information on
recalibration.
8.7 Troubleshooting
8.7.1 Data Loss During Precipitation Events
In extremely humid environments or after a precipitation event, data loss can
occur. Wicks on the analyzer windows help mitigate some of these data loss
events but cannot control for all conditions. In addition to wicking, heaters in
the snouts can aid in the prevention of data loss during precipitation and
condensation events. The heaters are automatically controlled by the EC100
electronics. The automatic heater control is activated using the
Device
Configuration Utility
or
ECMon
software. A value of
−
1 turns the automatic
heater control off and a value of
−
2 turns it on.
8.7.2 EC100 Diagnostics for Gas Analyzer Troubleshooting
Before troubleshooting and servicing the analyzer, become familiar with
(p. 1)
The EC100 is also programmed to recognize problems with an associated gas
analyzer and reports those with LED status lights and diagnostic flags. The two
types of warnings are described in the sections that follow.
8.7.3 LED Status Lights
The EC100 has three LED status lights located in the upper left corner of the
front panel which provide immediate visual feedback and warn the user of
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 ...
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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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