TDR100
FIGURE 4-1. PCTDR waveform for CS610 in water.
The algorithm will use the length of the waveform set by the
Waveform
Length
. After finding the probe beginning, the algorithm searches over the
remaining waveform for the end of the probe. The length must be large
enough to display a short distance past the end of the probe under the wettest
expected conditions.
TABLE 4-1. Recommended Waveform Length values for
range of TDR probe rod lengths assuming soil porosity of
0.60.
Probe rod length (m)
Recommended Waveform Length
value (m)
0.10 to 0.20
3
0.21 to 0.30
4
0.31 to 0.40
5
0.41 to 0.6
6
0.61 to 0.75
7
0.76 to 1.00
9
Use the recommended values listed in Table 1 or use the following equation to
estimate the required window length, L
w
.
10
