Campbell HFP01SC, Инструкция по эксплуатации, Страница: 8 / 36

Model HFP01SC Self-Calibrating Soil Heat Flux Plate
In order to measure soil heat flux at the surface, several HFP01SCs are used to
measure the soil heat flux at a depth of eight centimeters. A TCAV Averaging
Soil Thermocouple is used to measure the temporal change in temperature of
the soil layer above the HFP01SC. Finally, a CS650, CS655, or CS616 water
content reflectometer is used to measure the soil water content. The temporal
change in soil temperature and soil water content are used to compute the soil
storage term.
The -L option on the model HFP01SC Soil Heat Flux plate (HFP01SC-L)
indicates that the cable length is user specified. The HFP01SC-L has two
cables; the first cable is the signal output cable and the second is the heater
input cable. Two analog inputs are required to measure the HFP01SC-L. This
manual refers to the sensor as the HFP01SC.
The sensor's cable can terminate in:
•
Pigtails that connect directly to a Campbell Scientific datalogger
(option –PT).
•
Connector that attaches to a prewired enclosure (option –PW). Refer
to
www.campbellsci.com/prewired-enclosures for more information.
5. Specifications
Features:
•
Corrects for errors due to differences in thermal conductivity between
the sensor and surrounding medium, temperature variations, and
slight sensor instabilities
•
Compatible with most of our dataloggers
•
Uses Van den Bos-Hoeksma self-calibration method to provide high-
degree of measurement accuracy
Compatibility
Dataloggers:
CR800 series
CR1000
CR3000
CR5000
CR9000(X)
CR7X
CR10(X)
CR23X
21X
Operating Temperature: -30
°
to +70
°
C
Storage Temperature: -30
°
to +70
°
C
Plate Thickness: 5 mm (0.2 in)
Plate Diameter: 80 mm (3.15 in)
2