
Appendix B. Public Variables
TABLE B-1. CPEC200 public variables
Sonic virtual temperature
µmol∙mol
-1
2
mixing ratio, relative to
dry air
µmol∙mol
-1
2
O vapor mixing ratio,
relative to dry air
Temperature of the sample cell
pressure in the sample cell
Relative strength of the infrared
signal in the CO
2
absorption
Relative strength of the infrared
signal in the H
2
O absorption
kPa
Differential pressure (sample
cell, relative to ambient)
ºC
Temperature measured inside
the source housing
Placeholder variable to receive
a value from the EC100 (used
for an EC150, but not used for
ºC
2
O converted to dewpoint
temperature in the sample cell
ºC
corrected for pressure
difference between the sample
set = True to enable the sample
pump
LPM
sample pump speed, converted
to volumetric flow rate
pump speed control variable;
can be from 0 (off) to 1 (full
kPa
pressure measured at the
sample pump inlet
Boolean flag: True if the pump
temperature is within its
Boolean flag: True if the pump
heater is on
Boolean flag: True if the pump
fan is on
Set = True to manually initiate
a zero/span sequence
B-2
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