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METER GROUP 10HS Manual

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10HS

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Summary of Contents for METER GROUP 10HS

  • Page 1 10HS...

  • Page 2: Table Of Contents

    2.4.2 METER Data Loggers ................ 6 2.4.3 Non-METER Data Loggers ..............6 3. System ......................7 3.1 Specifications .................... 7 3.2 About 10HS ....................9 4. Service ....................... 10 4.1 Calibration ....................10 4.1.1 Dielectric Calibration ..............10 4.1.2 Mineral Soil Calibration ..............10 4.1.3 Potting Soil ..................

  • Page 4: Introduction

    This manual guides the customer through the sensor features and describes how to use the sensor successfully. METER hopes the contents of this manual are useful in understanding the instrument and maximizing its benefit. Prior to use, verify the 10HS arrived in good condition.

  • Page 5: Operation

    In addition, the 10HS sensor should not be installed within 5 cm of the soil surface, or the sensing volume of the electromagnetic field can extend out of the soil and reduce accuracy.

  • Page 6: Removing The Sensor

    3. Insert the sensor into the undisturbed soil face until the entire sensing portion of the 10HS is inserted. The tip of each prong has been sharpened to make it easier to push the sensor into the soil. Be careful with the sharp tips! 4.

  • Page 7: Connect To Meter Data Logger

    (orange) to a analog input, and the bare ground wire to ground. Power (brown) Ground (bare) Data (orange) Figure 2 Pigtail wiring NOTE: Some 10HS sensors may have the older Decagon wiring scheme where the power supply is white, the analog out is red, and the bare wire is ground.
  • Page 8 Figure 3 Wiring diagram NOTE: The acceptable range of excitation voltages is from 3 to 15 VDC. To read 10HS sensors with Campbell Scientific data loggers, power the sensor from a switched 12-V port or a 12-V port if using a multiplexer.

  • Page 9: Interfacing With Data Loggers

    10-ms duration and read a volt level signal with 12-bit or better resolution should be compatible with the 10HS sensor. The current requirement for the 10HS is 12 mA at 3 VDC. METER designed the 10HS sensor for use with data loggers and readout devices that provide short excitation pulses, leaving the sensors turned OFF most of the time.

  • Page 10: System

    10HS 3. SYSTEM This section describes the 10HS sensor. 3.1 SPECIFICATIONS MEASUREMENT SPECIFICATIONS Volumetric Water Content (VWC) Range 0−0.57 m (0%−57% VWC) Resolution 0.0008 m³/m³ (0.08% VWC) in mineral soils from 0−0.50 m³/m³ (0%−50% VWC) Accuracy With standard calibration equation, 0.03 m³/m³ (3% VWC) typical in mineral soils that have solution electrical conductivity <10 dS/m...
  • Page 11 SYSTEM PHYSICAL SPECIFICATIONS Dimensions Length 16.0 cm (6.3 in) Width 3.3 cm (1.3 in) Height 0.8 cm (0.3 in) Prong Length 10 cm (3.94 in) Operating Temperature Range Minimum –40 °C Typical Maximum 50 °C NOTE: Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance.

  • Page 12: About 10Hs

    EN50581:2012 3.2 ABOUT 10HS The 10HS determines volumetric water content (VWC) by measuring the dielectric constant of the media using capacitance and frequency domain technology. The 70-MHz frequency minimizes salinity and textural effects, making this sensor accurate in almost any soil or soilless media.

  • Page 13: Service

    3% VWC (0.03 m³/m³) is possible with most mineral soils. In these soils, it is generally not necessary to calibrate the 10HS for each particular soil type, and the standard mineral calibration can be used with METER data loggers: 1 17 10 −...

  • Page 14: Potting Soil

    10HS may suffer in soils with very high electrical conductivity (>10 dS/m solution EC). In these soils, it may be necessary to calibrate the 10HS to the specific soil type. With a soil-specific calibration, the accuracy of the VWC measurements will be improved to 1% to 2% in any soil or other porous medium.

  • Page 15: Troubleshooting

    SERVICE 4.2 TROUBLESHOOTING If problems with the 10HS are encountered, they most likely manifest themselves in the form of incorrect or erroneous readings. Review the information in Table 1 and the Troubleshooting METER soil moisture sensors video to identify the problem. Contact Customer Support more information.

  • Page 16: Customer Support

    Instrument serial number Phone Description of the problem NOTE: For 10HS sensors purchased through a distributor, please contact the distributor directly for assistance. 4.4 TERMS AND CONDITIONS By using METER instruments and documentation, you agree to abide by the METER Group, Inc.

  • Page 17: References

    SERVICE REFERENCES Bogena HR, Huisman JA, Oberdörster C, Vereecken H. 2007. Evaluation of a low-cost soil water content sensor for wireless network applications. J Hydrol. 344(1–2): 32–42. Kizito F, Campbell CS, Campbell GS, Cobos DR, Teare BL, Carter B, Hopmans JW. 2008. Frequency, electrical conductivity, and temperature analysis of a low-cost capacitance soil moisture sensor.

  • Page 18: Index

    INDEX Index range 7 accuracy 7 specifications cable length 8 communication 7 calibration 10–11 potting soil 11 data logger compatibility 7 electrical and timing 8 compliance 9 measurement 7 connecting physical 8 METER data logger 4, 6 non-METER logger 4–5, 6 connector types 8 customer support 12 terms and conditions 13–14...
  • Page 19 14565-01 03.15.2018 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: metergroup.com © 2018 All Rights Reserved.

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