Waterscout SMEC 300 Soil Product Manual
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9The EC sensor can be checked with the 1.41 mS/cm cali-bration standard (see Calibrating the EC Sensor p. 8).The soil moisture calibrations were developed using min-eral soils and a soilless material (peat moss). Therefore thesensor will not give a value of 100% in water. To check ifthe soil moisture sensor is still functioning properly, read-ings can be taken in the following media:AirIn air, the sensor should read a VWC of 0%.WaterIn distilled water, the sensor should read a VWC of about55% in Standard mode and about 68% in Soilless mode.Saturated Playground SandAdd water to playground sand until the surface glistensand no additional water can permeate the sand. The sen-sor should read a VWC of about 29% in Standard modeand about 60% in Soilless mode.Note: WatchDog weather stations display the StandardVWC value. The soilless mode is available on thehandheld reader only.Checking the Sensor |
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