Campbell Scientific HFP01SC Hukseflux Self-Calibrating Soil Heat Flux Plate - Manual (Page 10)

Model HFP01SC Self-Calibrating Soil Heat Flux Plate
The location of the heat flux plates and thermocouples should represent the
area of study. If the ground cover is extremely varied, it may be necessary to
have additional sensors to provide a valid spatial average of soil heat flux.
Use a small shovel to make a vertical slice in the soil. Excavate the soil to one
side of the slice. Keep this soil intact to ensure replacement with minimal
disruption.
The sensors are installed in the undisturbed face of the hole. Measure the
sensor depths from the top of the hole. With a small knife, make a horizontal
cut eight centimeters below the surface into the undisturbed face of the hole.
Insert the heat flux plate into the horizontal cut.
Install the HFP01SC in the soil such that the side with the text
“this side up” is facing the sky.
In order for the HFP01SC to make quality soil heat flux
measurements, the plate must be in full contact with the soil.
Never run the sensors leads directly to the surface. Rather, bury the sensor
leads a short distance back from the hole to minimized thermal conduction on
the lead wire. Replace the excavated soil into its original position after all the
sensors are installed.
FIGURE 6-2. HFP01SC plate
NOTE
CAUTION
Signal (White)
Signal Reference (Green)
Shield (Clear)
Heater Resistor Signal (Yellow)
Heater Resistor Signal Reference (Purple)
Shield (Clear)
Power (Red)
Power Reference (Black)
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