METER TEROS 11 Скачать руководство пользователя

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TEROS 11/12

INDEX

applications

calibration

18–19

custom soils calibration

mineral soils

soilless media

cleaning the sensors

compliance

declaration of conformity

components

13 –14

cable

connector types

ferrite core

needles

thermistor

configuration

See

data loggers, connect to METER logger

customer support

data loggers

6–7

connect to METER logger

connect to non-METER logger

7–8

electrical conductivity

15–17

bulk electrical conductivity

pore water electrical conductivity

15–16

saturation extract electrical

conductivity

16 –17

email address

fax number

ferrite core

about

installation

installation tool

methods

5 –6

borehole

trench

preparation

tools needed

maintenance

See

cleaning the sensors

phone number

references

safety

soil moisture

specifications

10 –13

data logger compatibility

dielectric measurement frequency

See

specifications, electrical

conductivity

electrical and timing characteristics

11–13

electrical conductivity

output

physical specifications

temperature

volume of influence

volumetric water content

VWC

See

specifications, volumetric water

content

Содержание TEROS 11

Страница 1: ...TEROS 11 12...

Страница 2: ...tions 10 3 2 Components 13 3 3 Theory 15 3 3 1 Volumetric Water Content 15 3 3 2 Temperature 15 3 3 3 Electrical Conductivity TEROS 12 Only 15 3 3 4 Converting Bulk EC to Pore EC TEROS 12 Only 15 3 3...

Страница 3: ...ii 4 2 Cleaning 19 4 3 Troubleshooting 19 4 4 Customer Support 20 4 5 Terms and Conditions 21 References 22 Index 23...

Страница 4: ...iv...

Страница 5: ...are accurate tools for monitoring volumetric water content VWC temperature in soil and soilless substrates and EC TEROS 12 only The TEROS 11 12 determines VWC using capacitance frequency domain techn...

Страница 6: ...d in Table 1 to set up the TEROS 11 12 and start collecting data For more detailed installation information consult the TEROS Sensors Best Practices Installation Guide Table 1 Installation Tools Neede...

Страница 7: ...il moisture measurement Installing the sensor with the body in a horizontal position will provide measurements at a more discreet depth See Measurement volume of METER volumetric water content sensors...

Страница 8: ...d cables or disconnected sensors Cabling issues can be caused by many factors such as rodent damage driving over sensor cables tripping over cables not leaving enough cable slack during installation o...

Страница 9: ...isadvantage Requires a specialized installation tool that can be rented from METER Trench The trench installation method is best for shallow installations less than 40 cm This requires digging a trenc...

Страница 10: ...comes standard with a 5 m cable It may be purchased with custom cable lengths for an additional fee on a per meter basis METER has successfully tested digital communication on cable lengths up to 1 0...

Страница 11: ...to the third party logger manual for wiring details Connect the TEROS 11 12 wires to the data logger illustrated in Figure 2 and Figure 3 with the power supply wire brown connected to the excitation...

Страница 12: ...r to the pigtail adapter connections using adhesive line heat shrink to ensure the sensor does not become disconnected during use 2 3 COMMUNICATION The TEROS 11 12 sensor communicates using two differ...

Страница 13: ...ote Setting SDI 12 addresses on METER digital sensors using Campbell Scientific data loggers and LoggerNet When using the sensor as part of an SDI 12 bus excite the sensors continuously to avoid issue...

Страница 14: ...ate the necessary ranges for most substrates Resolution 0 001 m3 m3 Accuracy Generic calibration 0 03 m3 m3 typical in mineral soils that have solution EC 8 dS m Medium specific calibration 0 01 0 02...

Страница 15: ...munications protocol Data Logger Compatibility METER ZL6 EM60 and Em50 data loggers or any data acquisition system capable of 4 0 to 15 VDC power and serial or SDI 12 communication PHYSICAL SPECIFICAT...

Страница 16: ...3 6 V Maximum 3 9 V Digital Input Voltage logic low Minimum 0 3 V Typical 0 0 V Maximum 0 8 V Digital Output Voltage logic high Minimum NA Typical 3 6 V Maximum NA Power Line Slew Rate Minimum 1 0 V m...

Страница 17: ...ISO 9001 2015 EM ISO IEC 17050 2010 CE Mark 2014 30 EU and 2011 65 EU EN61326 1 2013 and EN55022 CISPR 22 3 2 COMPONENTS The TEROS 11 12 sensor measures soil moisture temperature and EC TEROS 12 only...

Страница 18: ...o the section of cable between the sensor head and the ferrite core as this may influence the measurements The TEROS 11 12 VWC measurement sensitivity is contained within a 1 010 mL volume roughly dep...

Страница 19: ...uch as in preferences in the ZENTRA software NOTE Even though the sensor head is white in direct sunlight the temperature measurement may read high Use caution when installing the sensor with the sens...

Страница 20: ...oil 20 where Tsoil is the soil temperature C measured by the TEROS 12 Finally b 0 is an offset term loosely representing the dielectric permittivity of the dry soil Hilhorst 2000 recommended that b 0...

Страница 21: ...rates this relationship Example A soil is at 0 1 m3 m3 VWC has a pore water EC of 0 7 dS m and a dry bulk density of 1 5 Mg m3 The total porosity of the soil can be calculated using Equation 3 Equatio...

Страница 22: ...s a single calibration equation will generally suffice for most mineral soil types with ECs from 0 dS m to 8 dS m saturation extract VWC is given by Equation 5 Equation 5 m3 m3 3 879 10 4 RAW 0 6956 A...

Страница 23: ...Rinse the sensor and needles thoroughly with tap or deionized DI water NOTE Do not touch the needles with an ungloved hand or bring them in contact with any source of oil or other nonconducting resid...

Страница 24: ...y need to be performed Soils with a bulk EC greater than 10 dS m require substrate specific calibrations Section 4 1 Cable or stereo plug connector failure If a stereo plug connector is damaged or nee...

Страница 25: ...on of the problem NOTE For products purchased through a distributor please contact the distributor directly for assistance 4 5 TERMS AND CONDITIONS By using METER instruments and documentation you agr...

Страница 26: ...r conductivity sensor Soil Science Society of America Journal 64 6 1922 1925 Topp G Clarke J L Davis and Aa P Annan 1980 Electromagnetic determination of soil water content Measurements in coaxial tra...

Страница 27: ...y 15 pore water electrical conductivity 15 16 saturation extract electrical conductivity 16 17 email address 20 F fax number 20 ferrite core about 14 I installation installation tool 2 methods 5 6 bor...

Страница 28: ...tions 21 22 theory 15 18 electrical conductivity 15 17 See also electrical conductivity temperature 15 volumetric water content 15 VWC See theory volumetric water content troubleshooting 19 20 V volum...

Страница 29: ...Court Pullman WA 99163 T 1 509 332 5600 F 1 509 332 5158 E info metergroup com W metergroup com METER Group AG Mettlacher Stra e 8 81379 M nchen T 49 89 1266520 F 49 89 12665236 E info metergroup de...

Страница 30: ......

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