Decagon Devices 5TE Operator's Manual
Also see for 5TE: Operator's manual
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Contents
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5TE Operator’s Manual4. Calibration12electrical conductivity <10 dS/m, the Topp equation willresult in measurements within ±3% VWC of the actual soilVWC. If you require more accurate VWC than ±3% or areworking in a soil with very high electrical conductivity, ornon-normal mineralogy, then it may be necessary to conducta soil specific calibration for your 5TE sensor which willimprove the accuracy to 1-2% for any soil. For more infor-mation on how to perform your own soil-specific calibra-tion, or to have Decagon’s calibration service perform onefor you, visit us online at http://www.decagon.com.Calibration in Non-Soil MediaDecagon has performed calibrations with the 5TE in severalnon-soil growth media. The following are suggested cali-bration equations for some common materials.Potting SoilVWC = 2.25x10-5 εa3 - 2.06x10-3 εa2 + 7.24x10-2 εa - 0.247RockwoolVWC = -1.68x10-3 εa2 + 6.56x10-2 εa + 0.0266PerliteVWC = -1.07x10-3 εa2 + 5.25x10-2 εa - 0.0685Decagon will develop additional calibration equations forvarious other growth media as opportunities arise. Pleasecheck the Decagon website (http://www.decagon.com) orcontact Decagon for the status of this ongoing research.The 5TE can accurately read VWC in virtually any porousmedium if a custom calibration is performed. For informa- |
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