Campbell Scientific IRGASON IRGASON Integrated CO2/H2O Open-Path Gas Analyzer - Page 33

Unprompted Output, RS-485, RS485 Baud Rate, TABLE 8-1., USB and RS-485 Output Elements, Data Element

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IRGASON® Integrated CO2/H2O 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 Ux m/s 2 Uy m/s 3 Uz m/s 4 Sonic temperature °C 5 Sonic diagnostic flag 6 CO2 density mg/m3 7 H2O density g/m3 8 Gas diagnostic flag 9 Air temperature °C 10 Air pressure kPa 11 CO2 signal strength Nominally 0.0 to 1.0 12 H2O 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 23

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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
23