Campbell HFP01, Руководство по эксплуатации продукта

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B-1
Appendix B. Example Program
The nominal calibration sensitivity is 67.1 µ V/W –2 for the HFP01#1 and
67.0
µ
V/W –2 for the HFP01#2. In CRBasic Example B-1 , the nominal
calibration sensitivity is 67.1
µ
V/W
–2
.
TABLE B-1. Wiring for CRBasic Example B-1
Description Color CR3000
Sensor Signal #1 White 7H
Sensor Signal Reference #1 Green 7L
Shield #1 Clear
⏚
Sensor Signal #2 White 8H
Sensor Signal Reference #2 Green 8L
Shield #2 Clear
⏚
CRBasic Example B-1. Sample CR3000 Program using Differential Measurement Instructions
'CR3000 Series Data Logger
'This data logger program measures two HFP01 Hukseflux soil heat flux sensors
'*** Constants ***
Const HFP01_CAL_1 = 14.90 'Unique multiplier for HFP01 #1. 1000/sensitivity (1000/67.1)
Const HFP01_CAL_2 = 14.92 'Unique multiplier for HFP01 #2. 1000/sensitivity (1000/67.0)
'*** Energy balance sensor variables ***
Public shf(2)
Dim shf_cal(2) 'Soil heat flux plate calibration coefficients.
Units shf = W/m^2
'*** Final Output Data Tables ***
DataTable (soil_hf,TRUE,-1)
DataInterval (0,30,Min,10)
Average (2,shf(1),IEEE4,FALSE)
EndTable
'*** Program ***
BeginProg
'Load the HFP01 factory calibration.
shf_cal(1) = HFP01_CAL_1
shf_cal(2) = HFP01_CAL_2
Scan (1,Sec,3,0)
'Measure the HFP01 soil heat flux plates.
VoltDiff (shf(1),2,mV50C,7,TRUE,200,250,shf_cal(),0)
CallTable soil_hf
NextScan
EndProg