Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 43)

EC150 CO
2
/H
2
O Open-Path Gas Analyzer
power supply cable is adequate gage and does not cause excessive voltage
drop.
• SONIC Status LED
The SONIC status LED will turn red if there is no CSAT3A connected to
the EC100 electronics or if any of the six sonic diagnostic flags are set.
Please refer to TABLE 8-2 and to the CSAT3A instruction manual for
more detail information on sonic diagnostic flags.
TABLE 8-2. Diagnostic Flags of Sonic Status LED
Diagnostic
Flag Flag Name Action
0 Sonic amplitude low Clear debris from sonic
path
1 Sonic amplitude high No action
2 Poor signal lock Clear debris from sonic
Return to factory for
calibration
3 Delta temperature warning flag Return to factory for
calibration
4 Sonic acquiring signals No action
5 Signature error in reading
CSAT3A sonic head calibration
Check sonic umbilical
cable connection
Cycle power
Contact an application
engineer for a new
calibration file and upload
procedure
• GAS Status LED
The GAS status LED will turn red in the following situations:
o The EC150 gas head is not connected
o Any of the gas diagnostic flags are set
The GAS status LED will turn orange during the initial power up
sequence, usually 1-2 min and will turn to green when the sequence is
completed and if no diagnostic flags have been set high.
8.7.4 Diagnostic Flags
The EC100 operating system has extensive self-diagnostic capabilities.
TABLE 8-3 lists 23 (numbered 0 through 22) diagnostic flags that allow the
user to identify problems associated with the operation and the performance of
the EC100 electronics and the gas analyzer. There is one master flag
( BAD_DATA, or flag 0) that is set when measurements are compromised.
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