Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 51)

Appendix A. EC150 Settings
The Unprompted Output setting is stored in non-volatile memory of the EC100
electronics.
A.2.5 RS-485 Baud Rate
If the unprompted output mode is set to RS-485, the RS-485 Baud Rate
parameter determines the baud rate. Otherwise this setting is not used. The
RS-485 baud rate defaults to 115200 bps, although the user may enter another
value.
The RS-485 Baud Rate setting is stored in non-volatile memory of the EC100
electronics.
A.2.6 Analog Output
The EC100 has two analog outputs for CO
2
and H
2
O densities (see Appendix
C.2, Analog Outputs). These outputs may be enabled or disabled with this
setting. The default is for analog output to be disabled.
The Analog Output setting is stored in non-volatile memory of the EC100
electronics.
A.2.7 ECMon Update Rate
The ECMon Update Rate setting determines the rate at which data are sent
over the USB connection to the PC while running ECMon. The default setting
of 10 Hz should be adequate in most situations.
The ECMon Update Rate setting is stored in non-volatile memory of the
EC100 electronics.
A.2.8 Temperature Sensor
The Temperature Sensor setting configures the EC100 electronics to work
with either an EC150 open-path gas analyzer or an EC155 closed-path gas
analyzer. The EC150 measures ambient air temperature using a thermistor
probe mounted in the solar radiation shield (see Section 6.3.3, Connect the
EC150 Temperature Probe).
With the Auto-Select default setting, the EC100 will automatically detect that
an EC150 is connected to the electronics and will report ambient air
temperature measurements from the thermistor probe.
The EC150 temperature sensor is measured at 1Hz, and is not synchronized to
the CO
2
/H
2
O measurements.
To diagnose problems with the temperature measurement, a fixed temperature
value may be used, or the temperature sensor may be selected manually.
The Temperature Sensor setting is stored in the non-volatile memory of the
EC150 head.
A.2.9 Fixed Temperature Value
If the Temperature Sensor setting is None, the EC150 will use the value of the
Fixed Temperature Value setting for the sample temperature. This mode is
intended for troubleshooting only. In normal operation, the Temperature
Sensor is set to Auto-Select, and this setting is not used.
A-3