Campbell Scientific CS616 and CS625 Water Content Reflectometers - Manual (Page 18)

CS616 and CS625 Water Content Reflectometers
'CR200(X) program to read 4 CS625s
'Standard calibration is used to convert CS625 output
'period to volumetric water content.
'Sensors are read hourly and average water content are written to storage every 4 hours.
'Declare Variables
Public period(4),vwc(4)
Dim i
'Declare Constants
Const a0=-0.0663
Const a1=-0.0063
Const a2=0.0007
'Define Data Tables
DataTable (ofile,1,10)
DataInterval (0,4,hr)
Average (4,vwc,0)
EndTable
'Main Program
BeginProg
Scan (1,hr)
SWBatt (1)
PeriodAvg (period(1),1,0,10,10,C1,1,0)
PeriodAvg (period(2),2,0,10,10,C1,1,0)
PeriodAvg (period(3),3,0,10,10,C1,1,0)
PeriodAvg (period(4),4,0,10,10,C1,1,0)
For i=1 To 4
vwc(i) = a0 + a1*period(i) + a2*period(i)^2
Next i
CallTable ofile
NextScan
EndProg
6.4.3.2 CS625 Sample Program 2
Measure temperature with 109 probe and use the 109 temperature to correct the
period for 1 CS625. Use standard calibration equation to convert temperature-
corrected period to volumetric water content. Sensors are read hourly and
average water content and temperature are written to storage every 4 hours.
CS625 leads CR200(X)
green
Single-Ended Channel 1 (SE1)
black ground for SE1
orange Control Port 1 (C1)
red SW Battery
clear G
109 leads CR200(X)
black Switched excitation channel 1 (EX1)
red Single-Ended Channel 5 (SE5)
purple G
clear G
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