METER TEROS 10 Скачать руководство пользователя страница 20

16

SERVICE

Table 3  Troubleshooting the TEROS 10 (continued)

problem

possible Solution

Sensor reading too high

Check to make sure that the media was not packed excessively or 

insufficiently during sensor installation. Higher density can cause 

sensor reading to be elevated.

Ensure the calibration equation being used is appropriate for the 

media type. There are significant differences between calibrations, 

so be sure to use the one most suitable to the substrate, or consider 

developing a substrate-specific calibration for the particular 

medium.

Some substrates have an inherently high dielectric permittivity (soils 

of volcanic origin or high titanium, for instance). If the substrate has a 

dry dielectric permittivity above 6, a custom calibration may need to 

be performed. 

Cable or stereo plug 

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 wire splicing and 

sealing techniques

.

4.3  CUSTOMER SUppORT

Customer service representatives are available for questions, problems, or feedback Monday 
through Friday, 7 am–5 pm Pacific time.

Email: 

[email protected]

 

 

[email protected]

phone: +1.509.332.5600 

Fax: +1.509.332.5158

Website: 

metergroup.com

If contacting METER by email, please include the following information: 

Name

Address 

Phone

Email address 

Instrument serial number

Description of the problem

NOTE:  For TEROS 10 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. USA Terms and Conditions. Please refer t

metergroup.com/terms-conditions

 for details.

Содержание TEROS 10

Страница 1: ...TEROS 10...

Страница 2: ......

Страница 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...

Страница 4: ...ii...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 24: ......

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