Campbell IRGASON, Product Manual, Page: 28 / 91

l
Ambient relative humidity (in humidity greater than 80% heaters will try to maintain
internal temperature 2 degrees warmer than ambient)
l
CO
2
signal level (1 min average CO
2
signal level; below 0.7 will cause the heater to turn on
maximum power until the signals recover)
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Average slope of the CO
2
signal level over 1 min
l
Standard deviation of the CO
2
signal over 1 min
When enabled, this setting applies a voltage between 0 and 4000 mV to heaters near the optical
windows of the analyzer. Heated windows inhibit the formation of condensation, such as dew
and frost, and help the analyzer recover more quickly when precipitation has blocked the optical
path. Use this setting with caution. Excessive heating may lead to density fluctuations and
subsequent flux measurement errors. More information about heater control, and specifically
using a data logger for control, may be found at the end of
EC100Configure() instruction (p. 49).
7.14 ECMon
Settings for the IRGASON are easily verified or changed using the Windows PC support software
ECMon (Eddy Covariance Monitor), which is found at www.campbellsci.com/downloads .
Launch ECMon , and connect the EC100 electronics to the PC with the included EC100 USB cable.
The USB connection for the EC100 electronics is found on the base of the enclosure (see FIGURE
6-7 (p. 17)). Once connected, select the appropriate communications port in the ECMon main
page and click Connect (see FIGURE 7-1 (p. 25)). Next, click on the Setup button. All of the
preceding settings are now available for editing (see FIGURE 7-2 (p. 26)).
Besides changing settings, ECMon is a useful tool for common tasks such as:
l
Monitoring real-time data from the IRGASON from the main window
l
Performing manual zero and span of the instrument ( Zero and span (p. 34))
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Troubleshooting and monitoring diagnostics using the Status window.
IRGASON® Integrated CO
2
/H
2
O Open-Path Gas Analyzer and 3D Sonic Anemometer 24