Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 65)

Appendix C. Alternate EC100 Outputs
C.1 USB or RS-485 Output
C.1.1 Specifications
Digital
RS-485
Data type: ASCII
Output Rate viii : 5 to 50 Hz
Baud rate viii : 1200 to 230400 bps USB
USB
Data type: ASCII
Output rate viii : 10, 25, or 50 Hz
C.1.2 Detailed Information
In contrast to the SDM output mode, which is prompted by a datalogger, data
can also be output from the EC100 via USB or RS485 in an unprompted mode.
In this case, the EC100 sends out data without initiation from the receiving
device at a rate determined by the EC100. Only one unprompted output type
(USB or RS-485) may be selected at a given time. USB output is used to
connect a PC to the EC100 when using Device Configuration Utility or
ECMon software. RS-485 output is recommended over SDM for sending data
to a datalogger if the cable length exceeds 100 meters.
To use USB or RS-485 output, connect a USB (pn 26563) or RS-485 (pn
26987) cable from the EC100 to the receiving device (see Section 6.3, Wiring
and Connections), and configure the settings.
The Unprompted Output parameter must be set to USB or RS-485.
If RS-485 is selected, the RS-485 Baud Rate must be set.
The Unprompted Output Rate must be set to the desired output rate.
All output data will be in ASCII format, with each data element separated by a
comma. Each record will terminate with a carriage return and line feed.
TABLE C-1 below lists the elements in each output array, and FIGURE C-1
shows an example USB data feed in terminal mode.
TABLE C-1. USB and RS-485 Output Elements
Data
Element Description
Units or comments
1 Ux m/s
2 Uy m/s
3 Uz m/s
4 Sonic Temperature °C
viii user selectable
C-1