Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 59)

Appendix A. EC150 Settings
TABLE A-2. ConfigCmd Values for Setting and Retrieving Settings
ConfigCmd Variable Setting Description (some settings list possible
values for the DestSource variable) Set Retrieve
6 106 Pressure Gain
7 107
Temperature Sensor:
• 0 = EC150 Temperature Probe
• 1 = EC155 Sample Cell Thermistor
• 2 = EC155 Sample Cell Thermocouple
• 3 = None (use fixed value)
• 4 = Auto-Select
8 108 Fixed Temperature Value
9 109
Unprompted Output Mode:
• 0 = Disable
• 1 =USB
• 2 = RS-485
10 110 RS-485 Baud Rate
11 111
Span/Zero Control:
• 0 = Inactive
• 1 = Zero
• 2 = Span CO
2
• 3 = Span H
2
O (See Appendix A.5.1,
ConfigCmd 11 Zero-and-Span Control.)
12 112 CO
2
Span Concentration
13 113 H
2
O Span Dewpoint Temperature
14 114 CO
2
Zero
15 115 CO
2
Span
16 116 H
2
O Zero
17 117 H
2
O Span
18 or 218 118 Heater Voltage (0 to 4.5375V, −1 = Off)
19 119 Reserved
20 120
Analog Output Enable:
• 0 = Disable
• 1 = Enable
21 121
PowerDown:
• 0 = Gas Head On
• 1 = Gas Head Off
99 N/A Save Settings to EEPROM memory
A.5.1 ConfigCmd 11 Zero-and-Span Control
To perform zeroing of CO
2
and H
2
O, ConfigCmd 11 is set to 1. After the
EC150 completes the zero, it will write the value to –1. The datalogger can
poll this value or simply wait for a period of time to allow the zeroing to
A-11