Measuring Soil Respiration with CIRAS-2
CIRAS-2 Operator's Manual Version 2.04
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Chamber Properties
Volume (cm
3
)
If our SRC-1 chamber is used, the default value is fixed (1171.0) and can not be changed. Please note:
If soil collars or similar devices are used with our SRC-1 chamber, the total volume will be larger than the
default value. In that case you will need to open the Custom Chamber Type dialog by clicking the Add
custom accessory button and entering the correct volume. See Add Custom Accessory on page 44.
Area (cm
2
)
If an SRC-1 chamber is used, the default value is fixed (78.5) and can not be changed. Please note: If
soil collars or similar devices are used with our SRC-1 chamber, the total area will be larger than the
default value. In that case you will need to open the Custom Chamber Type dialog by clicking the Add
custom accessory button and entering the correct volume. See Add Custom Accessory on page 44.
System Type
SRC-1 refers to a standard chamber supplied by PP Systems.
Recording Parameters
CO
2
Change
The maximum amount of change in CO
2
concentration from the start of measurement. The default value
is 60 ppm.
Maximum Time
The maximum amount of time (seconds) from the start of measurement to the end. The default value is
60 seconds.
System Temperature
The approximate ambient temperature (at soil surface). The default value is 25 °C.
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