Campbell HydroSense II, Руководство пользователя

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HydroSense II Soil Moisture Measurement System
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PER – The average period of the water content reflectometer
(CS658/9). The value is displayed in microseconds.
Below the sensor readings is displayed the model number and rod length of the
sensor used (in this case “CS658 20cm”). This is updated with each
measurement.
If the water content sensor is not properly connected or malfunctioning, the
display will show “SENSOR TIMEOUT” as shown above.
6.3.4 Deficit Display
When deficit mode is enabled, the water deficit section is displayed on the centre
right of the
main screen . The top screenshot shows the main screen with deficit
mode disabled and the bottom screenshot is with deficit mode enabled.
The water deficit section contains the following information:
Soil type - This is soil number 1 to 10.
RWC - relative water content from 0% to 100% where 0% represents
“dry” (wilting point) and 100% is “wet” (field capacity).
DEF – water deficit expressed in mm of rain.