Campbell TDR100 User Manual

TDR100 Table of Contents
11. References ...............................................................51
Figures
3-1 Waveform of a CS610 in water................................................................5
3-2 Waveform of CS610 in water after changing Start and Length parameters
to display relevant portion of reflected signal......................................6
4-1 PCTDR waveform for CS610 in water ..................................................10
5-1 TDR System Components......................................................................11
5-2 SDMX50 signal attenuation...................................................................12
5-3 Terminal Strip Adapters for Connections to Battery..............................13
5-4 Location of Address Jumpers on SDMX50 ...........................................15
8-1 Waveforms collected in a sandy loam using CS610 probe
with RG8 connecting cable. Volumetric water content is
24% and bulk electrical conductivity is 0.3 dS m
-1
............................28
8-2 Waveforms collected in a sandy loam using CS610 probe
with RG8 connecting cable. Volumetric water content
values are 10, 16, 18, 21 and 25%. Solution electrical
conductivity is 1.0 dS m
-1
...................................................................29
8-3 Waveforms collected in a sandy loam using CS610 probe
with RG8 connecting cable. Volumetric water content
values are 10, 18, 26, 30 and 37%. Solution electrical
conductivity is 10.2 dS m
-1
.................................................................30
9-1. Typical TDR100 waveform showing key features with numbers
1, 2 and 3............................................................................................31
9-2. PCTDR terminal emulator screen showing TDR100 algorithm
parameter variables ............................................................................32
9-3. Waveform and derivative values near TDR probe and locations of
index for point of maximum derivative and maximum derivative
value. The green band represents the results of the search using
the threshold value .............................................................................34
10-1 Twenty-nine CS605 or CS610 probes connected to 4ea SDMX50
multiplexers........................................................................................50
Tables
4-1 Recommended Waveform Length values for range of TDR probe rod
lengths assuming soil porosity of 0.60...............................................10
5-1 SDM Addressing for Early SN SDMX50s and Edlog Dataloggers.......15
6-1 Reflection waveform array header elements ..........................................25
6-2 Probe Constant Values for Campbell Scientific Probes.........................26
iii

Campbell TDR100 Specifications

General

Brand	Campbell
Model	TDR100
Category	Measuring Instruments
Language	English