Campbell TDR Especificaciones Pagina 17

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Appendix A. Discussion of TDR Probe Offset and a Simple Laboratory Method for Calculation
converting waveform index to apparent distance
thWindowLeng
1datapoints
start
:start
index
distance
=
thWindowLeng
1datapoints
end
:end
index
distance
=
65.0start
distance
=
4.3end
distance
=
(
)
p
distancep
V
endV
distance
startLa
:obeOffsetPr
+
=
tProbeOffse
086.0
=
TABLE A-1. Dielectric permittivity
values for range of temperatures.
From equation [A5].
Temperature (°C)
Dielectric
Permittivity
15 82.23
15.5 82.04
16 81.85
16.5 81.67
17 81.48
17.5 81.29
18 81.1
18.5 80.92
19 80.73
19.5 80.55
20 80.36
20.5 80.18
21 79.99
21.5 79.81
22 79.63
22.5 79.44
23 79.26
23.5 79.08
A-5
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