User Manual

253-L and 257-L Soil Matric Potential Sensors
;{CR10X}
*Table 1 Program
01: 1.0000 Execution Interval (seconds)
;Measure soil temperature with 107 sensor
1: Temp (107) (P11)
1: 1 Reps
2: 1 SE Channel
3: 1 Excite all reps w/E1
4: 1 Loc [ Tsoil_C ]
5: 1.0 Multiplier
6: 0.0 Offset
;Measure 257 block resistance
2: AC Half Bridge (P5)
1: 1 Reps
2: 14 250 mV Fast Range
3: 2 SE Channel
4: 2 Excite all reps w/Exchan 2
5: 250 mV Excitation
6: 2 Loc [ kOhms ]
7: 1 Multiplier
8: 0 Offset
;Convert Half Bridge reading to kOhms
3: BR Transform Rf[X/(1-X)] (P59)
1: 1 Reps
2: 2 Loc [ kOhms ]
3: 1 Multiplier (Rf)
;Calculate dT = T -21
4: Z=X+F (P34)
1: 1 X Loc [ Tsoil_C ]
2: -21 F
3: 4 Z Loc [ CorFactr ]
;Calculate (0.018 * dT)
5: Z=X*F (P37)
1: 4 X Loc [ CorFactr ]
2: 0.018 F
3: 4 Z Loc [ CorFactr ]
;Calculate (1 - (0.018 * dT))
6: Z=X+F (P34)
1: 4 X Loc [ CorFactr ]
2: -1 F
3: 4 Z Loc [ CorFactr ]
7: Z=X*F (P37)
1: 4 X Loc [ CorFactr ]
2: -1 F
3: 4 Z Loc [ CorFactr ]
21