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TDR 250

Soil Moisture Meter

PRODUCT MANUAL

Item # 6250

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Summary of Contents for 6250

Page 1: ...TDR 250 Soil Moisture Meter PRODUCT MANUAL Item 6250 ...

Page 2: ...ure ments The meter also measures soil surface tempera ture The user can quickly transition between taking VWC readings in standard high clay and sand soils The TDR 250 s shaft mounted probe allows the user to take measurements while standing The meter s built in data logger eliminates the need to record data manually Measurements can be saved to a USB flash drive using the built in USB port Conte...

Page 3: ...Time 12 Maintenance 13 Data Logs 14 VWC Measurements 15 Optional Accessories 16 Appendix 1 Soil Specific Reading Correlation 17 Appendix 2 Troubleshooting 18 Appendix 3 Updating Device Firmware 19 Appendix 4 Calibration 20 Glossary 21 CE Declaration of Conformity 22 UK Declaration of Conformity 24 FCC ISED and other Regulatory Information 26 Warranty 28 ...

Page 4: ...around 50 volumetric water Connectivity USB Type A port for USB Flash Drives Power 4 AA alkaline batteries Log Capacity Up to 124 000 measurements Display Backlit high contrast graphic LCD Weight 4 3 lbs 1 9 kg IP Rating Display IP53 Probe IP67 Available Rod Dimensions Turf 1 5 3 8cm Short 3 0 7 6cm Medium 4 8 12 2cm Long 8 0 20 32cm Diameter 0 2 0 5cm Spacing 1 2 3cm Specifications ...

Page 5: ...5 Product dimensions ...

Page 6: ...tore in a cool and dry place when not in use Keep the meter and probe rods clean and dry in between uses Remove the batteries if not used for an extended period of time ie between seasons Battery life If the battery level is low or a bat tery is inserted incorrectly the low battery icon appears on the screen and the display will power off Battery life is affected by the ena bled features and frequ...

Page 7: ...reen MENU or SELECT button Press to enter available menus Press to select or confirm a menu selection DELETE or UP button Press to move up within a menu Delete last measurement from the running aver age counter and its entry from the internal data log see page 14 READ or DOWN button Press to move down within a menu From Reading screen press to make a reading Press and hold to reset the average and...

Page 8: ...u See page 10 Taking Readings 1 Grip the TDR handles to the left and right of the display 2 Push down on the handles maintaining a steady downward pressure to drive the rods into the soil until the sensor base is in contact with the soil surface Refrain from any back and forth or side to side movement which can introduce air pockets into the soil medium which will alter the reading accuracy Cautio...

Page 9: ...nformation Press and hold ON OFF BACK button to remain on this screen Reading screen Measurements from the sensor are displayed on the Reading screen along with rod size used soil type and a reading count with running average VWC 0 readings will be displayed but will not increment the counter or be included in the average Press READ to take readings update Count and the Average The battery level i...

Page 10: ...Clear Logs Erases data logs from internal memory Save to USB Transfers data logs to a USB flash drive if attached Backlight Sets the LCD backlight ON OFF AUTO In AUTO mode the backlight will shut off 5 seconds after a button press Sound Enable or disable beep for audible feedback Moisture Type Selects displayed moisture mode VWC Period or TDR 300 VWC Volumetric Water Content with EC compensation P...

Page 11: ...ngs and counter to the factory default value Pressing Select button for these options brings up an additional screen About Displays general information Model and serial number firm ware versions for display and sensor Defaults Rod Length None Soil Type Standard Sound On Temperature Fahrenheit Backlight Disabled Moisture Type VWC EC Units mS cm Auto Off 15 minutes Time Zone GMT ...

Page 12: ...access the Time Date up date screen 4 Press the DELETE UP button to set the date and time The current time for the timezone setting will be displayed 5 Use the UP and DOWN arrows to adjust the highlighted selec tion 6 Press the MENU SELECT button to confirm the change and proceed to the next selection 7 After pressing the MENU SELECT button to set the minutes the display will return to the Reading...

Page 13: ...observing correct polarity by referencing the positive and negative labels 3 Follow the display installation steps below to reinstall the display Display Installation 1 Re connect the sensor cable to the 3 5mm connector on the back of the display module if previously removed 2 Insert the foam spacer back behind the sensor cable The split end fits around the sensor cable molding 3 Guide the excess ...

Page 14: ...sing the internal Data log 1 Press the MENU SELECT button to open the Settings Menu 2 Press the READ Down arrow button to reach the Clear Logs option 3 Press the MENU SELECT button to select the option 4 Press MENU SELECT button again to start the process or the ON OFF BACK button to return back to the menu Data Collected The following information is logged with each reading Time VWC Period Rod Ty...

Page 15: ... Wilting Point and Field Capacity One rule of thumb is that irrigation should be initiated when half the Plant Available Water has been depleted Time Domain Reflectometry TDR The speed of an electromagnetic wave along a waveguide in soil is dependent on the bulk dielectric permittivity of the soil matrix The fact that water 80 has a much greater dielectric constant than air 1 or soil solids 3 7 is...

Page 16: ...aide in identification of how fast and firm the turf greens are The spacer has two orientations allowing it to work for either desired depth Requires 3 8 cm 1 5 turf rods For use with firmware version 1 02 or higher Allows for the measurement of 1 3cm 0 5 or 2 5cm 1 0 soil depths Pilot Hole Maker item 6430PH If the ground is especially hard or compact you can use a Pilot Hole maker to make 3 holes...

Page 17: ... reading at each sample site 4 Extract a known volume of soil at each sample site Ideally an undisturbed soil core Reduce evaporation store samples in a sealed plastic container 5 Weigh the wet soil samples 6 Dry the samples 105o C for 48 hours and weigh again 7 Plot sample measurements against FieldScout TDR readings Regression analysis is used to develop a formula to correlate TDR readings to th...

Page 18: ...ock is securely plugged into the display Appendix 2 Troubleshooting Sensor Function Verification Test readings can be taken in three standard environments air distilled water and sand saturated with distilled water It is important that any troubleshooting be done with distilled water instead of municipal well or tap water Test readings are made in a container of distilled water or satu rated sand ...

Page 19: ...eter s USB port 4 Insert the flash drive directly into the meter s USB port Note A USB cable is not required or recommended 5 While pressing the DELETE Up arrow button press and re lease the ON OFF BACK button The meter will beep briefly and the screen should stay blank 6 Release the buttons Note The display screen will remain blank during the update process The meter will beep a second time once ...

Page 20: ...istilled deionized water into the container The water level must be deeper than the rods currently installed Note The wa ter and container must be free of minerals and salts to calibrate properly 2 From the Settings Menu page 10 set the rod length to the correct length of the rods currently installed 3 From the Settings Menu choose the Calibration option 4 Press the Select button to initiate the c...

Page 21: ...d water in the soil TDR Time Domain Reflectometry A technique for measuring soil moisture content that uses the fact that water has a much higher dielectric permittivity than air soil minerals and organic matter VWC Volumetric Water Content The percent of the soil volume that is filled with water At saturation the VWC will equal the soil porosity ...

Page 22: ...s conform with the relevant requirements of the Harmonized Legislations mentioned below Specifically but not limited to the following harmonized stand ards and or normative documents Harmonization Legislation 2014 53 EU Radio Equipment Directive 2011 65 EU Restriction of Hazardous Substances Directive Article 3 1 a Safety of Information Technology Equipment EN 60950 1 2006 A11 2009 A1 2010 A12 201...

Page 23: ...d to internal GNSS module Antenova Ltd M20050 1 where used EN 303 413 V1 1 1 2017 Global Navigation Satellite System GNSS receivers as applied to internal GNSS module Antenova Ltd M20050 1 where used Article 3 2 Spectrum Efficiency EN 300 328 V2 1 1 2016 11 Wideband Data Transmission Systems 2 4 GHz Band Emissions EMC as applied to internal Bluetooth module Silicon Labs BGM113A V1 or BGM13P where ...

Page 24: ...d to the following harmonized stand ards and or normative documents Harmonization Legislation 2016 No 1091 The Electromagnetic Compatibility Regulations 2016 2012 No 3032 The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 Safety of Information Technology Equipment EN 60950 1 2006 A11 2009 A1 2010 A12 2011 A2 2013 as applied to interna...

Page 25: ...S module Antenova Ltd M20050 1 where used EN 303 413 V1 1 1 2017 Global Navigation Satellite System GNSS receivers as applied to internal GNSS module Antenova Ltd M20050 1 where used Spectrum Efficiency EN 300 328 v2 1 1 as applied to internal Bluetooth module Silicon Labs BGM113A V1 or BGM13P where used EN 300 440 V2 2 1 2018 07 Short Range Devices 1 40 GHz Emissions EMC EN 303 413 V1 1 1 2017 Sa...

Page 26: ...t generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment...

Page 27: ...and regulations for proper collection and recycling initiatives in the local area This is applicable to areas within the European Union and other participating countries including the USA The recycling of materials will help to conserve natural resources and prevent negative conse quences of inappropriate waste handling at the end of a products usable life For more information about the recycling ...

Page 28: ...s not cover damage due to im proper installation or use lightning negligence accident or unauthor ized modifications or to incidental or consequential damages beyond the Spectrum product Before returning a failed unit you must obtain a Re turned Materials Authorization RMA from Spectrum Spectrum is not responsible for any package that is returned without a valid RMA num ber or for the loss of the ...

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