PP Systems CIRAS-3 - Page 146

CIRAS-3 Operation Manual V. 1.09 146 support@ppsystems.com
The Accessory field will populate automatically along with the following system defaults:
Settings
SRC-1/SRC-2
CPY-4/CPY-5
Chamber Volume
1171 cc
2344 cc
Chamber Area
78.5 cm
2
167 cm
2
Collar Volume
0 cc
0 cc
Collar Area
0 cm
2
0 cm
2
CO2 Max
50 µmol mol
-1
50 µmol mol
-1
Time Max
60 s
60 s
Surface Temperature
25
o
C. With the SRC-1 this value
is manually entered by the user.
The SRC-2 includes a surface
temperature sensor and this
value is measured and displayed
continuously.
Not applicable
Esoil units
g m
-2
hr
-1
mmol m
-2
s
-1
(Default)
Not applicable
FCO2 units
g m
-2
hr
-1
µmol m
-2
s
-1
(Default)
Not applicable
Transpiration units
Not applicable
g m
-2
hr
-1
mmol m
-2
s
-1
(Default)
Assimilation, Respiration
units
Not applicable
g m
-2
hr
-1
µmol m
-2
s
-1
(Default)
Important note. If using collars with our chambers you must make sure that you update the Collar
Volume and Collar area fields for accurate results. If not using collars, the above system defaults should
be used for all calculations and should not need updating.
Also, it is important to take note of the measurement units that you have selected for Soil Evaporation,
FCO2, Transpiration and Assimilation, Respiration for later data analysis.