Campbell Scientific Bowen Ratio Instrumentation - Manual (Page 23)

Section 3. Sample CR23X Program
3-3
Table 2
10 Second Excitation Interval
Yes
40 Second Interval ?
No
Reset Flag 1
Yes
Flag 5 Set ?
No
Yes
Flag 4 Reset
?
No
Call Subroutine 1
Yes
2 Minute Interval ?
No
Set Flag 1
Yes
4 Minute
Interval ?
No
Set Port 2 High
Set Flag 2
Set Port 1 High
Reset Flag 2
Delay 0.01 Seconds
Set Port 1 Low
Set Port 2 Low
Measure Battery Voltage
Measure Net Radiation
Yes
Net Radiation Positive ?
No
Call Subroutine 3
(wind speed correction on
positive radiation)
Call Subroutine 4
(wind speed correction on
negative radiation)
Measure 2 Soil Heat Flux Plates
Measure Soil Temperature (Layer Average)
Scale Heat Flux Measurements
Wind Speed Wind Direction
Yes
Ten Minutes Into Interval ?
No
Measure CS615
Yes
Last 10 Minutes of a 20
Minute Interval ?
No
Compute Average Soil Temperature
Yes
20 Minute Interval ?
No
Calculate 10 Minute Soil Temp. (avg)
Calculate Change from Previous Soil Temp.
[output process]
Day, Hour:Minute
Net Radiation (avg)
2 Soil Heat Flux Plates (avg)
Soil Temp. 10 min. avg. (smpl)
Change in Soil Temp. (smpl)
CS615 mSec Soil Water Content
Soil Water Content Corrected for Temp.
Battery (avg)
Call Subroutine 2 (battery check)