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TDR 350

Soil Moisture Meter

PRODUCT MANUAL

Item # 6435

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Summary of Contents for 6445

Page 1: ...TDR 350 Soil Moisture Meter PRODUCT MANUAL Item 6435 ...

Page 2: ...etween taking VWC readings in standard high clay and sand based soils The TDR 350 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 The data points can be viewed with the FieldScout Mo bile app that maps out soil measurements using logged location coordinates Measurements can also be saved to an ex...

Page 3: ...16 Field Scout Mobile App SpecConnect 18 FieldScout Mobile App Setup and Use 20 Maintenance 22 VWC Measurements 24 Electrical Conductivity 25 Optional Accessories 26 Appendix 1 Soil Specific Reading Correlation 27 Appendix 2 Troubleshooting 28 Appendix 3 Updating Device Firmware 29 Appendix 4 Calibration 30 Glossary 31 CE Declaration of Conformity 32 UK Declaration of Conformity 34 FCC ISED and ot...

Page 4: ... 8 F 1 C 22 to 140 F 30 to 60 C Thermistor based Infrared Optional Connectivity USB Type A Bluetooth Low Energy GNSS Supported Systems Galileo GLONASS GPS QZSS where available EGNOS MSAS SBAS and WAAS enabled Accuracy 2 5m Typical 10m initial Power 4 AA batteries Log Capacity 50 000 measurements Display Backlit high contrast graphic LCD Weight 4 3 lbs 1 9 kg IP Rating Display IP53 Probe IP67 Avail...

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

Page 6: ...n and dry in between uses Remove the batteries if not used for an extended period ie be tween seasons Battery life A low battery level or improper installation of the batteries will show the low battery message briefly then the display will power off Battery life is affected by the enabled features connected ac cessories and the frequency of use If not needed the Bluetooth GNSS Location and backli...

Page 7: ...r screen MENU SELECT button Press to enter available menus Press to select or confirm a menu selection DELETE 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 p 16 READ DOWN button Press to move down within a menu Press to make a reading from the Reading screen Press and hold to reset the average and cou...

Page 8: ...r settings in the settings menu See the Set tings Menu 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 me...

Page 9: ... screen Reading screen Displays the last measurement EC in milliSiemens per centimeter tem perature selected rod type selected soil type and a reading count with running average VWC 0 readings will be displayed but will not incre ment the counter or be included in the average GNSS Info Period or VWC measured based on Moisture Type Mois ture Type Bluetooth Icon Remaining Battery Life Number of meas...

Page 10: ...ith higher clay content 27 Sand for sand based fields or turf greens Clear Logs Erases data logs from internal memory Save to USB Transfers data logs to a USB flash drive if at tached Backlight Sets the LCD backlight ON OFF AUTO In AUTO mode the backlight will shut off 5 seconds after a button press GNSS Location GNSS Power Save GNSS Use QZSS Enable or disable features related to geo location capa...

Page 11: ... changes the Time and Date will update Daylight Savings ON or OFF Calibration Overrides factory calibration See Appendix Clear User Calibration Clears the user applied calibration back to factory settings Factory Defaults Resets menu settings and counter to the fac tory default value About General information Model and serial number firmware versions for display and sensor Pressing Select button f...

Page 12: ...urrent Time option 3 Press the MENU SELECT button to access the Time Date up date screen There are 3 options A Press the READ DOWN button to download an update from the GNSS satellites Proceed to an area with a good view of the sky and press the Menu Select button to initiate the process B Press the DELETE UP button to set the date and time manu ally The current settings will be displayed Use the ...

Page 13: ... the Data Log Spec Connect FieldScout app measurements will include the global position of the mobile device running the app GNSS Power Save Enabled After periods of inactivity the GNSS receiver will be placed in standby to improve battery life The receiver resumes after the next read button press A brief pause may be noticed as the receiver resumes operation Disabled GNSS receiver will remain on ...

Page 14: ...on GNSS feature is enabled and not ready for location referencing of measurements Measurements made with this icon will not have a geo referenced location Partially Shaded HDoP level is high and the satellite count is low Measurements will have geo referenced coordinates with a low level of accuracy 10m typical Dark Shaded High satellite count without supplemental aug mentation Measurement locatio...

Page 15: ...ession Avoid powering off the meter between measurement locations with in a use session The meter will acquire the most satellites and bet ter position data when remaining on for longer periods of use Position the meter upright probes facing down while moving be tween locations to allow continued satellite tracking When positioning the meter for a measurement observe the display for a dark arrow i...

Page 16: ... be opened with common text editing or spreadsheet software If a previous data file exists on the flash drive with the same filename it will be over written Be sure to save any existing data logs on the flash drive prior to saving a new file Erasing the internal Data log 1 Press the MENU SELECT button p 10 to open the Settings Menu 2 Press the READ Down arrow button to reach the Clear Logs option ...

Page 17: ...reading in degrees Fahr enheit if equipped Latitude Longitude Geo referenced coordinate acquired in decimal degrees format Note A negative sign may appear indicating South or West coordinates Satellites Number of satellites used in geo referenced location Fix GNSS location fix level 0 unreferenced 1 fixed reference 2 fix with additional accuracy correction SBAS WAAS EGNOS Rod Length Depicted as L ...

Page 18: ...owing VWC average fig 1 Freeform mode Available with SpecConnect subscription Color coded location icons are placed at every measurement point using the coordinates from the meter fig 2 If the meter s GNSS location is disa bled or a blank arrow appears on the meter the app will use the internal location of the app s mobile device The data from the Pro version of the app is sent instantaneously to ...

Page 19: ...19 Fig 3 2 D Mapped Readings and Contour Plot in SpecConnect Fig 4 Trend Report ...

Page 20: ...rse farm or select an existing session 6 In Basic mode the Grid screen appears Tap on a grid cell where measurements will be added fig 1a In SpecConnect Freeform mode the app will transi tion to the session screen fig 1b 8 Tap the Connect FieldScout Device via Bluetooth button If Bluetooth is not enabled on the mobile device a prompt will appear to enable it 9 Select the TDR from the device list f...

Page 21: ...ne to bring up the Take Reading screen 11 Press the READ button on the TDR and the measurement data will appear on the mobile device Note Although the device appears in the app it may not appear on the phone s list of Bluetooth devices Left Grid mode example Right Freeform Measurement ...

Page 22: ...1 Follow the steps in Separating the Display and Sensor to access the batteries 2 Install four new AA batteries observing correct polarity by referencing the positive and negative labels 3 Follow the procedure on the next page to reinstall the display Display Removal 1 Follow steps for Separating the Display and Sensor to access the display and cable connections 2 Remove the foam spacer and unplug...

Page 23: ...e base and display in the same direction The USB port should face the same side as the serial number label 6 Tighten the four mounting screws Sensor Block Removal Replacement 1 Follow steps for Display Removal to access the cable connections 2 Remove the thumb screw lock bolt that joins the lower probe base to the upper shaft 3 Separate the probe base from the shaft fig 1 4 Feed the cable from the...

Page 24: ...ing 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 expl...

Page 25: ...xy measure ment is possible because as salts dissolve into the soil they disassociate into ions which conduct electricity Salinity Index The TDR also has the option to report EC in the form of the Salinity In dex The salinity index is defined as the ratio of the bulk EC to the volu metric water content expressed as a decimal For example if the bulk EC is 0 25 mS cm and the VWC is 22 the Salinity I...

Page 26: ...he turf greens are The spacer has two orientations allowing it to work for either desired depth Requires 3 8 cm 1 5 turf rods 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 to aid in starting the insertion of the probe rods 1 Year SpecConnect FieldScout Pro Subs...

Page 27: ...od 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 105 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 t...

Page 28: ... or write protected Verify the drive has FAT or FAT32 format Firmware should be in the root directory outside of any folders Sensor Not Detected appears on the display Communication lost between the sensor and display The connection may be dirty unplugged or broken Check the cable condition clean the connection and reseat Power off the meter and then back on to reset No Sensor appears on the displ...

Page 29: ...protective cap from the meter s USB port 4 Insert the flash drive 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 6 Release the buttons Note The display screen will remain blank during the update process The meter will beep a second time once the process has completed...

Page 30: ...tilled deionized water into the container Note The water 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 MENU SELECT button to initiate the calibration process Follow the display messages 5 While keeping ...

Page 31: ...and sur veying provides a descending value to gauge how precise a location measurement is across the Earth s surface QZSS Quasi Zenith Satellite System is a regional system launched by Japan and Australia which serves the local region and immediate sur rounding area SBAS Satellite Based Augmentation System used to improve satellite ranging errors TDR Time Domain Reflectometry A technique for measu...

Page 32: ...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 2011 A2 2013 as applied to internal Bluetooth module Silicon Labs BGM113A V1 or BGM13P where used EN 609...

Page 33: ...tellite 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 Emis sions EMC 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 Sate...

Page 34: ... 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 internal...

Page 35: ...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 36: ...rates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruc tions 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 off ...

Page 37: ...nd 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 consequences of inappropri ate waste handling at the end of a product s usable life For more information about the recycling ...

Page 38: ...38 ...

Page 39: ...negligence accident or unauthorized modifications or to incidental or consequential damages beyond the Spectrum product Before returning a failed unit you must obtain a Returned Materials Authorization RMA from Spec trum Spectrum is not responsible for any package that is returned without a valid RMA number or for the loss of the package by any shipping company Changes modification or use of this ...

Page 40: ...Rev L 06 2021 3600 Thayer Ct Aurora IL 60504 800 248 8873 or 815 436 4440 Fax 815 436 4460 E Mail info specmeters com www specmeters com ...

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