Campbell HydroSense II Manuel d'instructions

INSTRUCTION MANUALHydrosenseRevision: 2/01Copyright (c) 1999-2001Campbell Scientific, Inc.

HydroSense64.5 Measuring Volumetric Water ContentTo measure volumetric water content fully insert probe rods and press READ.The correct rod length mu

HydroSense7RWC 33 Site 1Deficit mm 34 20RelativeWaterContentSiteCurrentlySelectedDeficit12 cm ProbeDeficit20

HydroSense8WC 33 Site1Deficit 34 20MENUSELECTSiteExitMENUSELECTMENUSELECTREADENTERSite1Site2..5READENTERCalExitMENUSELECTCal0Cal100MENUSELECTREADENTER

HydroSense9prompt is displayed. With CAL 0 displayed, the probe rods are inserted andthe READ button is pressed. This stores the measured value in H

HydroSense106.1 Probe Rod InsertionMaking a measurement with HydroSense is a simple matter of inserting theprobe rods and pressing the READ button.

HydroSense11rocky soil, the measured water content can differ by several percent if a largerock occupies part of the sensitive volume of one measureme

HydroSense12making it possible to relate water content to measured dielectric permittivity.Additionally, water and air are the only soil constituents

HydroSense138. Maintenance8.1 Replacing BatteryFIGURE 8-1. Rear view of the HydroSense display unit with batterycover removedThe only user-replacea

HydroSense14The friction between the rod collar and the insert surface along with threadfriction will generally provide good rod attachment and loosen

A-1Appendix A. Definition of WaterContent TermsA.1 Definition of Water Content TermsSoil water content is expressed on a gravimetric or volumetric b

Warranty and AssistanceThe HYDROSENSE is warranted by CAMPBELL SCIENTIFIC, INC. to befree from defects in materials and workmanship under normal use a

Appendix A. Definition of Water Content TermsA-2θθρρvgsoilwater=∗=−026733. cm cmερρ=− =− =−−11132605033bulksolid... g cm g cmThe porosity of

B-1Appendix B. How Many Soil WaterContent Measurements Are EnoughB.1 Introduction to Spatial VariabilitySoil water content can vary significantly am

Appendix B. How Many Soil Water Content Measurements Are EnoughB-2The relationship between confidence interval and probability can be describedusing

Appendix B. How Many Soil Water Content Measurements Are EnoughB-3N is the number of water content measurements and L is the acceptable rangeas defin

Appendix B. How Many Soil Water Content Measurements Are EnoughB-4This is a blank page.

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Campbell Scientific CompaniesCampbell Scientific, Inc. (CSI)815 West 1800 NorthLogan, Utah 84321UNITED [email protected]

iHydroSense Table of ContentsPDF viewers note: These page numbers refer to the printed version of this document. Usethe Adobe Acrobat® bookmarks tab

HydroSense Table of ContentsiiA. Definition of Water Content Terms ...A-1A.1 Definition of Water Content Terms...

1HydroSense1. General DescriptionFIGURE 1-1. HydroSense display unit and probe with 12 cm rods.1.1 IntroductionThe HydroSense Soil Water Content Me

HydroSense21.2 HydroSense ModesThe Water Content Measurement Mode displays the measurement result aspercent volumetric water content and shows the pe

HydroSense3Weight approx 400 gmCable Spiral cable, 200cm extended.*saturation is typically around 50% volumetric water content3. Unpacking and Setup•

HydroSense4VWC 0% P12cmPeriod 0.77msMENUSELECTIn Water Content Measurement Mode, MENU is used to selectthe rod length. In

HydroSense54.3 Description of Water Content Measurement ModeThe Water Content Measurement Mode applies calibration coefficients tothe output of the p