Campbell Scientific CPEC200 Closed-Path Eddy-Covariance System - Manual (Page 85)

Appendix C. Output Variables
Compile Switches. The code shown in the table can be either V, S, or a
combination of two of the codes.
 V is defined if VALVE_MODULE = True
 S is defined if SCRUB_MODULE = True and
VALVE_MODULE = True
TABLE C-4. Values stored in table message_log
Compile
Switch
Variable
Name Units Description
TIMESTAMP TS Date and time the record was
written
RECORD RN Record number
message_str Message explaining why the
record was written
mode_status Operating state of the CPEC200
cpec_status Overall status of the CPEC200
sonic_status Status of the CSAT3A
irga_status Status of the EC155
pump_status Status of the sample pump
valve_status Status of the valve module
panel_tmpr ºC Temperature of the datalogger
wiring panel
BattVolt V Supply voltage; measured inside
datalogger after diode voltage
drop
Ts ºC Sonic virtual temperature
CO2 µmol∙mol -1 CO
2
mixing ratio, relative to dry
air
H2O mmol∙mol -1 H
2
O vapor mixing ratio, relative
to dry air
CO2_signal Relative strength of the infrared
signal in the CO
2
absorption
band
H2O_signal relative strength of the infrared
signal in the H
2
O absorption
band
diff_press kPa differential pressure (sample
cell, relative to ambient)
source_tmpr ºC temperature measured inside the
source housing
pump_ON Boolean flag: True if sample
pump is on
pump_flow LPM Sample pump speed, converted
to volumetric flow rate
pump_tmpr ºC Temperature of the pump
pump_press kPa Pressure measured at the sample
pump inlet
V SequenceStep Status of the zero/span sequence
(see Section 6.2, Automatic
Zero and Span, for details)
V smpl_counter How long (number of scans) the
sequence has been at this step
C-9