Introduction
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Table of content
1 Introduction 4
1.1 Safety instructions and warnings 4
1.2 Content of delivery 5
1.3 Foreword 6
1.4 Guarantee 6
1.5 Durability 6
1.6 Tensiometer T5 and T5x 7
1.6.1 Soils and soil water 7
1.6.2 Intended use 7
1.6.3 Typical applications 8
1.6.4 Extended measuring range of the T5x 8
1.6.5 Specific notes 9
1.7 Quick installation guide 10
2 Sensor description 12
2.1 Design 12
2.1.1 Body and shaft 12
2.1.2 Pressure transducer 12
2.1.3 Reference air pressure 12
2.1.4 The ceramic tip 13
2.2 Analog output signals 13
3 Installation 14
3.1 Scientific measure ideas 14
3.1.1 Selecting the measuring site 14
3.1.2 Number of Tensiometers per level 14
3.1.3 Extension of the site 14
3.1.4 Ideal conditions for installation 15
3.1.5 Documentation 15
3.1.6 Selecting the installation angle 15
3.2 Installation procedure 16
3.3 Offset correction for non horizontal installations 17
3.4 Connecting T5 and T5x 18
3.4.1 Spot readings with the INFIELD7 18
3.4.2 Cables 18
3.4.3 General requirements 18
3.4.4 TV-batt Tensiometer power supply 19
3.4.5 Connection to a data logger 19
3.4.6 Tensiometer loggers DL6-te or GP1-te 19
4 Service and maintenance 20
4.1 Refilling 20
4.1.1 When do Tensiometers need to be refilled? 20
4.1.2 Refilling T5 in lab and field 20
4.2 Testing 32
4.2.1 Calibration 32
4.2.2 Check the Offset 32
4.3 Cleaning 33
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