Campbell TDR100 Manuel d'instructions télécharger pdf (Page 17)

TDR100

(

)

⋅+

−

max

0176

0114

with L the actual probe rod length, and, θ

v-max

the maximum expected

volumetric water content. Two m is added for the .5 m before the probe and

some distance after the probe end. For example, using a CS610 with 0.3 m

probe rod length in a soil with a porosity of 0.6 gives an estimated apparent

probe length of 4.04 m. Setting the Waveform Length to 4 m is recommended.

5. System Components: Datalogger Control

5.1 General

CR10X,

CR23X,

CR1000

FIGURE 5-1. TDR System Components

5.2 Datalogger

Campbell Scientific CR10X and CR23X dataloggers use Instruction 119 and

various other instructions to control the TDR100 measurement sequence and

store the resulting data. PC208W (version 3.1 or higher) or LoggerNet are

used to link the datalogger to a computer for data and program transfer.

Campbell Scientific CR1000 dataloggers use Instruction “TDR100” to control

the TDR100 measurement sequence and store the resulting data. PC400 or

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Campbell TDR100 Manuel d'instructions Page 17