Campbell Scientific TDR100 Time Domain Reflectometry Systems - Manual (Page 57)

TDR100
;NOTE: While Flag 1 is high Instruction 109 will take control of the
;SDM ports 1-3. It may not be possible to follow the ports
;going High and low with a voltmeter while this is happening.
2: If Flag/Port (P91)
1: 11
Do if Flag 1 is High
2: 30 Then Do
3: SDMX50 Channel Select (P109)
1: 01
SDM Address ; Enter correct address for connected multiplexer
2: 8 SDM Channel
4: End (P95)
;End, If Flag 1
*Table 2 Program
02: 0.0000 Execution
Interval (seconds)
*Table 3 Subroutines
End Program
11. References
Bilskie, Jim. 1997. “Reducing Measurement Errors of Selected Soil Water
Sensors. Proceedings of the International Workshop on Characterization and
measurement of the hydraulic properties of unsaturated porous media. 387-
396.
Topp, G.C., J.L. Davis & A.P. Annan. 1980. “Electromagnetic determination
of soil water content: measurements in coaxial transmission lines,” Water
Resources Research, v. 16, No. 3:574-582.
Ledieu, J., P. De Ridder, P. De Clerck, and S. Dautrebande. 1986. “A method
of measuring soil moisture by time-domain reflectometry,” J. Hydrol. 88:319-
328.
Giese, K., and R. Tiemann. 1975. “Determination of the complex permittivity
from thin-sample time domain reflectometry, Improved analysis of the step
response waveform,” Adv. Molec. Relax. Processes 7:45-49
Rhoades, J.D., N.A. Manteghi, P.J. Shouse, and W.J. Alves. 1989. Soil
electrical conductivity and soil salinity: New formulations and calibrations.
Soil Sci Soc. Am. J. 53:433-439.
Rhoades, J.D., P.A.C. Raats, and R.J. Prather. 1976. Effects of liquid-phase
electrical conductivity, water content and surface conductivity on bulk soil
electrical conductivity. Soil Sci. Soc. Am. J. 40:651-655.
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