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Summary of Contents for Spectrum Technologies Field Scout TDR 250
- Page 1 TDR 250 Soil Moisture Meter PRODUCT MANUAL Item # 6250...
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Page 2: General Overview
General overview Thank you for purchasing the Field Scout TDR 250 soil moisture meter. This manual describes the meter's general features and operation. Soil moisture is a critical, and potentially highly varia- ble, component of the soil environment. Time domain reflectometry is a proven technology for quickly and accurately determining volumetric water content (VWC) in soil. -
Page 3: Table Of Contents
CONTENTS General Overview Specifications Product Dimensions Meter Care Button Functions Meter Operation Display Screens Setting the Date/Time Maintenance Data Logs VWC Measurements Optional Accessories Appendix 1: Soil Specific Reading Correlation Appendix 2: Troubleshooting Appendix 3: Updating Device Firmware Appendix 4: Calibration Glossary CE Declaration of Conformity UK Declaration of Conformity... -
Page 4: Specifications
Specifications Measurement Percent volumetric water content (VWC) Units Period (raw sensor reading) Resolution, VWC: 0.1% increment ±3.0% @ < 2 mS/cm Accuracy and 0% to Saturation (Saturation is typically around Range 50% volumetric water) Connectivity USB Type A port for USB Flash Drives Power 4 AA alkaline batteries Log Capacity Up to 124,000 measurements... -
Page 5: Product Dimensions
Product dimensions... -
Page 6: Meter Care
Meter Care The FieldScout TDR meter will function properly under normal conditions experienced in field use. The sensor block is sealed and will not be damaged by immersion in water. The display is not waterproof. The meter should not be used during heavy rain- fall or left exposed during irrigation events. -
Page 7: Button Functions
Button Functions ON/OFF or BACK button Press briefly to power on. − Press and hold to power on and stay on the logo − screen. Press and hold for 2 seconds to power off. − Press within a menu to return to prior screen. −... -
Page 8: Meter Operation
Meter Operation Figure 1. Handlebars Attached Setting up the meter 1. Slide the lock washers onto the threaded ends of the handle bars. 2. Install the two cushion grip handles and tighten securely. 3. Pull the battery transport tab out of the display unit. 4. -
Page 9: Display Screens
Display Screens The TDR 250 has 3 main display screens: - Startup Information (shown on page 7) - Reading (shown below) - Settings Menu (see page 10) Startup Information screen Initially displayed after first powered on. - Displays firmware version information. - Press and hold ON/OFF|BACK button to remain on this screen. - Page 10 Settings Menu screen Used for changing device features, setting rod length and working with log files. Use the arrow buttons to move to the desired option. The Select button toggles through option choices. Clear Average*: Clears the displayed average and count. Note: Same as pressing and holding the READ|Down arrow button Rod Length: Select the Rod length.
- Page 11 Calibration*: Overrides factory calibration. See Appendix 4 Clear User Calibration: Clears the user applied calibration back to factory settings Factory Defaults*: Resets menu settings and counter to the factory default value. Pressing Select button for these options brings up an additional screen.
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Page 12: Setting The Date/Time
Setting Date/Time The Date and Time are displayed in the Settings Menu. Note: When the batteries are removed, the date and time are re- set. Updating the Date and Time 1. Press the MENU|SELECT button to enter the Settings Menu. 2. -
Page 13: Maintenance
Maintenance Display and Sensor Separation: 1. Remove the probe rods from the base. 2. Flip the TDR display over. 3. Remove the 4 screws on the base using a Philips screwdriver. 4. Gently separate the display module from the base plate. Note: The sensor cable connected in the center has limited cable length. -
Page 14: Data Logs
Data Logs Downloading Data Logs to a USB Flash Drive 1. Connect the flash drive directly to the meter’s USB port. Note: A USB ca- ble is not required or recommended. 2. Press the MENU|SELECT button to open the Settings Menu. 3. -
Page 15: Vwc Measurements
VWC Measurements Volumetric Water Content (VWC) The ratio of the volume of water in a given volume of soil to the total soil volume expressed as a decimal or a percentage. Three soil moisture levels of most importance can be defined as follows: Saturation: All soil pores are filled with water. -
Page 16: Optional Accessories
Optional Accessories There are two optional items that can be used to expand the capabil- ities of the TDR. Visit www.specmeters.com for more information and installation instructions. TDR Spacer (item 6435SP) Placed on the end of the sensor block to aide −... -
Page 17: Appendix 1: Soil Specific Reading Correlation
Appendix 1: Soil-Specific Reading Correlation To improve accuracy, correlate TDR period readings with a soil- specific sample set. VWC data can be correlated by measuring the weight of a known volume of saturated soil as it is gradually dried, by gradually wet- ting a known volume soil with measured increments of water, or by using a neutron probe. -
Page 18: Appendix 2: Troubleshooting
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. -
Page 19: Appendix 3: Updating Device Firmware
Appendix 3: Updating Device Firmware Firmware updates may be made available to add or improve the product features. The firmware can be updated using a USB flash drive. Firmware update files can be found on the Spectrum web- site. 1. Copy the latest firmware update from your PC onto the root directory of the flash drive. -
Page 20: Appendix 4: Calibration
Appendix 4: Calibration The FieldScout TDR is fully calibrated at the factory. Further calibration is not required nor recommended. The meter has internal calibrations for standard, sand, and high-clay soil types which will work for many soils. Each meter will have a small difference in how it responds to identical soil conditions. -
Page 21: Glossary
Glossary EC: Electrical Conductivity. A measure of how well the soil solu- tion conducts electricity. The EC is influenced by the amount of salt and 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. -
Page 22: Ce Declaration Of Conformity
In accordance with European Parliament and Council Decision No. 768/2008/EC Annex III we, Spectrum Technologies, Inc., a corporation validly organized and existing under the laws of the United States of America, having its principal place of business at 3600 Thayer Court, Aurora... - Page 23 EN 301 489-1 V2.2.3; 2019-11 EMC standard for radio equipment and services; Part 1: Com- mon technical requirements EN 301 489-3 V2.1.1; 2019-03 EMC standard for radio equipment and services; Part 3: Specific conditions for Short-Range Devices EN 301 489-17 v3.1.1 EMC standard for radio equipment and services;...
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Page 24: Declaration Of Conformity
UK Declaration of Conformity (DoC) #20210118_2 In accordance with BS EN ISO/IEC 17050-1:2010 we, Spectrum Technologies, Inc., a corporation validly organized and existing under the laws of the United States of America, having its principal place of business at 3600 Thayer Court, Aurora IL 60504 USA... - Page 25 EN 301 489-3 V2.1.1; 2019-03 EMC standard for radio equipment and services; Part 3: Specific conditions for Short-Range Devices EN 301 489-17 v3.1.1 EMC standard for radio equipment and services; Part 17 (as applied to internal Bluetooth module Silicon Labs BGM113A-V1 or BGM13P where used) EN 301 489-17 V3.2.4;...
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Page 26: Fcc, Ised, And Other Regulatory Information
Unique Identifier: FieldScout Soil Moisture Meter 6435 (TDR-350), 6250 (TDR-250), 6445 (TDR-150) Responsible Party – U.S. Contact Information Spectrum Technologies, Inc., 3600 Thayer Ct. Aurora IL 60504 Phone: (800) 248-8873 or (815) 436-4440 Fax (815) 436-4460 E-Mail: info@specmeters.com Web: www.specmeters.com Directive/Standard: FCC Part 15: 2020: Emissions for Unintentional Radiators for USA (ANSI C63.4:2014) - Page 27 Proper Disposal of Waste Electrical and Electronic Equipment This symbol when found on the product or packaging indicates that this product shall not be treated as common waste and that an effort to recycle materials should be made or may be required. Dis- posal of used and depleted electrical &...
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Page 28: Warranty
Warranty This product is warranted to be free from defects in material or work- manship for two years from the date of purchase. During the warranty period Spectrum will, at its option, either repair or replace products that prove to be defective. This warranty does 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.
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