Campbell Scientific 227-L Delmhorst Cylindrical Soil Moisture Block - Manual (Page 20)

227 Delmhorst Cylindrical Soil Moisture Block
TABLE 7-7. Wiring for CR10X Example Program
Color Function CR10(X)
Black Excitation E1
Red Signal SE1
White Signal Ground AG
Clear Shield G
*Table 1 Program
01: 10.0000 Execution
Interval (seconds)
01: AC Half Bridge (P5)
;Measure and store Vs/Vx
1: 1 Reps
2: 14 250 mV Fast Range
3: 1 SE Channel
4: 1 Excite all reps w/Exchan 1
5: 250 mV Excitation
6: 1 Loc [ Rs ]
7: 1 Mult
8: 0 Offset
02: BR Transform Rf[X/(1-X)] (P59)
;Convert Vs/Vx to Rs
1: 1 Reps
2: 1 Loc [ Rs ]
3: 1 Multiplier (Rf)
03: If (X<=>F) (P89)
;If Rs < 17, Use 10 bar polynomial
1: 1 X Loc [ Rs ]
2: 4 <
3: 17 F
4: 30 Then Do
04: Z=X*F (P37)
;Scale Rs for polynomial
1: 1 X Loc [ Rs ]
2: .1 F
3: 2 Z Loc [ WatPoten ]
05: Polynomial (P55)
;Convert Rs to bars with 10 bar polynomial
1: 1 Reps
2: 2 X Loc [ WatPoten ]
3: 2 F(X) Loc [ WatPoten ]
4: .15836 C0
5: 6.1445 C1
6: -8.4198 C2
7: 9.2493 C3
8: -3.1685 C4
9: .33392 C5
06: Else (P94)
;If Rs > 17 load overrange value for potential
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