Campbell-scientific HFT3 REBS Soil Heat Flux Plate Manual de usuario descargar pdf (Pagina 7)

Model HFT3 Soil Heat Flux Plate

Never run the sensors leads directly to the surface. Rather, bury the sensor

leads a short distance back from the hole to minimize thermal conduction on

the lead wire. Replace the excavated soil back into it original position after all

the sensors are installed.

FIGURE 2. HFT3 Plate to Datalogger Connections

TABLE 1. Datalogger Connections for a Single-Ended Measurement

Description Color CR10(X), CR510 CR23X, 21X, CR7

Signal Black Single-Ended Input Single-Ended Input

Signal Reference White AG

Shield Clear G

TABLE 2. Datalogger Connections for a Differential Measurement

Description Color CR10(X), CR510 CR23X, 21X, CR7

Signal Black Differential Input (H) Differential Input (H)

Signal Reference White Differential Input (L) Differential Input (L)

Shield Clear G

4. Wiring

Connections to Campbell Scientific dataloggers are given in Tables 1 and 2.

The output of the HFT3 can be measured using a single-ended analog

measurement (Instruction 1) or a differential analog measurement (Instruction

2).

Signal Black

Signal Reference White

Shield Clear

White Dot

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Campbell-scientific HFT3 REBS Soil Heat Flux Plate Manual de usuario Pagina 7