Campbell Scientific IRGASON Integrated CO2/H2O Open-Path Gas Analyzer and 3D Sonic Anemometer - Manual (Page 33)

IRGASON ® Integrated CO
2
/H
2
O Open-Path Gas Analyzer and 3D Sonic Anemometer
To use USB or RS-485 output, connect a USB or RS-485 cable from the
EC100 to the receiving device (see Section 6.3, Wiring and Connections), and
configure the settings (see Section 7, Settings).
The Unprompted Output setting must be set to USB or RS-485.
If RS-485 is selected, the RS485 Baud Rate must be set.
The Unprompted Output Rate must be set to the desired output
rate.
All output data are formatted as comma delimited ASCII. Each record
terminates with a carriage return and line feed. TABLE 8-1 lists the elements
in each output array, and FIGURE 8-1 shows an example USB data feed in
terminal mode.
TABLE 8-1. USB and RS-485 Output Elements
Data Element Description Units/comments
1 U
x
m/s
2 U
y
m/s
3 U
z
m/s
4 Sonic temperature °C
5 Sonic diagnostic flag
6 CO
2
density mg/m 3
7 H
2
O density g/m 3
8 Gas diagnostic flag
9 Air temperature °C
10 Air pressure kPa
11 CO
2
signal strength Nominally 0.0 to 1.0
12 H
2
O signal strength Nominally 0.0 to 1.0
13 Not used
14 Counter Arbitrary
15 Signature Arbitrary in hexadecimal
FIGURE 8-1. An example of USB data output in terminal mode
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