METER TEROS 10 Manual Download Page 22

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INDEX

applications 1

calibration

custom soils calibration 14
dielectric permittivity 15
mineral soils 14
soilless media 14

compliance 12

CE mark 12
declaration of conformity 12

components 12–13

cable 11
connector types 11
ferrite core 12
needles 11

configuration

See data logger

customer support 16

data loggers 7–8

connect to METER logger 7
connect to non-METER logger 8–9

ferrite core

about 12
installation 3

installation

ferrite core 3
installation tool 2
methods 6–7

borehole 6
trench 6

preparation 3
tools needed 2

safety 2
specifications 10 –13

data logger compatibility 10
dielectric measurement frequency 10
electrical and timing characteristics 11 –13
physical specifications 11
volume of influence 13
volumetric water content 10

terms and conditions 16 –17
theory 13
troubleshooting 15–16

volumetric water content

specifications 10
theory 13

Summary of Contents for TEROS 10

Page 1: ...TEROS 10...

Page 2: ......

Page 3: ...R Logger 8 2 3 Interfacing With Data Loggers 9 3 System 10 3 1 Specifications 10 3 2 Components 12 3 3 Theory 13 4 Service 14 4 1 Calibrations 14 4 1 1 Mineral Soils 14 4 1 2 Soilless Media 14 4 1 3 A...

Page 4: ...ii...

Page 5: ...rous materials This manual guides the customer through the sensor features and applicationsand describes how to use the sensor successfully Volumetric water content VWC measurement Soil substrate wate...

Page 6: ...uctions and have the proper protections in place to safeguard sensors from damage If installing sensors in a lightning prone area with a grounded data logger see the application note Lightning surge a...

Page 7: ...cm Installing Create Hole Avoid interfering objects Large metal objects can affect the sensor function and distort readings Roots or rocks that could potentially bend the needles and should be avoide...

Page 8: ...urement Installing the sensor with the body oriented horizontally on its side will provide measurements at a more discreet depth See Measurement volume of METER volumetric water content sensors for mo...

Page 9: ...ogger mast to ensure cable weight does not cause sensor to unplug conduit zip tie mast ERROR OK TEST P1 P2 P3 P4 P5 P6 Securing excess cable Backfill the Hole Return soil to the hole packing the soil...

Page 10: ...ce at measurement site Disadvantage Requires a specialized installation tool that can be rented from METER Trench This method is best for shallow installations less than 40 cm This requires digging a...

Page 11: ...is 40 m 2 2 1 CONNECT TO METER DATA LOGGER The TEROS 10 sensor works seamlessly with METER ZENTRA EM60 or Em50 data loggers Check the METER Download web page for the most recent data logger firmware L...

Page 12: ...g Connect the TEROS 10 wires to the data logger as illustrated in Figure 2 with the supply wire brown connected to the excitation the analog out wire orange to an analog input and the bare ground wire...

Page 13: ...e sensor does not become disconnected during use 2 3 INTERFACING WITH DATA LOGGERS The TEROS 10 sensor is designed to work most efficiently with METER data loggers All METER readout devices use a 3 0...

Page 14: ...or most substrates Resolution 0 001 m3 m3 Accuracy Mineral soil calibration 0 03 m3 m3 typical in mineral soils that have solution EC 8 dS m Soilless media calibration 0 05 m3 m3 typical in media that...

Page 15: ...d cable length is needed Connector Types 3 5 mm stereo plug connector or stripped and tinned wires ELECTRICAL AND TIMING CHARACTERISTICS Supply Voltage VIN to GND Minimum 3 0 VDC Typical NA Maximum 15...

Page 16: ...The TEROS 10 microprocessor measures the charge time and outputs a raw value based on the substrate dielectric permittivity The raw value is then converted to VWC by a calibration equation specific t...

Page 17: ...cause of the sensitivity of the measurement of the sensor head the TEROS 10 is not well suited for spot measurements of VWC 3 3 THEORY TEROS 10 sensors use an electromagnetic field to measure the ea o...

Page 18: ...W 3 1 222 10 6 RAW 2 2 855 10 3 RAW 2 154 where RAW is the output from the METER data logger If using a non METER data logger VWC is given by Equation 2 Equation 2 m3 m3 4 824 10 10 mV 3 2 278 10 6 mV...

Page 19: ...RAW is the output from the METER data logger If using a non METER data logger VWC is given by Equation 6 Equation 6 1 054 10 1 e2 827 10 3 mV 4 2 TROUBLESHOOTING Table 3 Troubleshooting the TEROS 10 P...

Page 20: ...connector failure If a stereo plug connector is damaged or needs to be replaced contact Customer Support for a replacement connector and splice kit If a cable is damaged follow these guidelines for wi...

Page 21: ...17 TEROS 10 REFERENCE Topp GC David JL and Annan AP 1980 Electromagnetic determination of soil water content Measurement in coaxial transmission lines Water Resources Research 16 3 574 582...

Page 22: ...ect to METER logger 7 connect to non METER logger 8 9 F ferrite core about 12 installation 3 I installation ferrite core 3 installation tool 2 methods 6 7 borehole 6 trench 6 preparation 3 tools neede...

Page 23: ...6 30 2018 METER Group Inc USA 2365 NE Hopkins Court Pullman WA 99163 T 1 509 332 5600 F 1 509 332 5158 E info metergroup com W www metergroup com 2018 All Rights Reserved Printed in USA...

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