Campbell Scientific Bowen Ratio Instrumentation - Manual (Page 22)

Section 3. Sample CR23X Program
3-2
TABLE 3-1. Sample CR23X Bowen Ratio Program Flow Chart
Table 1
1 Second Execution Interval
Measure Panel Temperature
Measure Lower Thermocouple (Single Ended)
Measure Upper Thermocouple (Differential)
Measure RTD on Cooled Mirror
Subtract Upper TC Temp. from the Lower TC Temp.
Calculate RTD R/Ro
Calculate RTD Temperature
Calculate Vapor Pressure
Yes
Flag 5 Set?
No
Yes
20 Minute Interval ?
No
Set Flag 0 (Output)
Yes
Flag 4 Set ?
No
Set Flag 0 (Output)
Set Flag 5
[process]
Day, Hour:Minute (smpl)
Panel Temperature (smpl)
Lower Temperature (avg)
Temperature Gradient (avg)
Yes
Flag 2 Set ?
No
Set Flag 9
(Disable Intermediate Processing)
Yes
Flag 1 Set ?
No
Set Flag 9
(Disable Intermediate Processing)
[process]
Upper Dew Point (avg)
Upper Vapor Pressure (avg)
Reset Flag 9
Yes
Flag 2 Reset ?
No
Set Flag 9
(Disable Intermediate Processing)
Yes
Flag 1 Set ?
No
Set Flag 9
(Disable Intermediate Processing)
[process]
Lower Dew Point (avg)
Lower Vapor Pressure (avg)