What to do if "No Sensor" appears on Spectrum Fieldscout TDR 350 Measuring Instruments?
If "No Sensor" appears on the Spectrum Measuring Instruments display, it could be due to a dirty or unplugged sensor cable. First, try cleaning the cable connection. Next, check the cable connection to the display. Finally, ensure the probe block is securely plugged into the display.
How to fix Spectrum Fieldscout TDR 350 when unable to save data or load firmware from USB?
If you are unable to save data or load firmware from a USB flash drive on your Spectrum Measuring Instruments, verify the drive is not full and that it is formatted as FAT or FAT32. Also, ensure the firmware file is located in the root directory of the drive, not within a folder.
General| Measurement Principle | Time Domain Reflectometry (TDR) |
|---|---|
| Display | LCD |
| Data Logging | Yes |
| GPS | Yes |
| Connectivity | Bluetooth |
| Power Source | 4 AA batteries |
| Measurement Type | Soil Moisture, Soil Temperature, Electrical Conductivity |
| Soil Measurement | Volumetric Water Content (VWC), Soil Temperature |
| VWC Range | 0% to Saturation |
| Salinity Range | 0 to 5.0 dS/m (Electrical Conductivity) |
| Resolution | VWC: 0.1%; Temperature: 0.1°C |
| Rod Length | 7.5 cm or 20 cm |
| Probe Length | 20 cm (8 in) |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -20°C to 60°C |
| Accuracy | ±3% VWC, ±1°C temperature |
Lists the components included with the TDR 350 meter.
Details units, resolution, accuracy, and measurement ranges for VWC, EC, and Temperature.
Information on USB, Bluetooth, GNSS, Power, Log Capacity, Display, and IP Rating.
Lists the available rod lengths and dimensions for the meter.
Explains battery operation, factors affecting life, and management tips.
Explains the functions of ON/OFF, BACK, MENU, and SELECT buttons.
Details the DELETE, UP, READ, and DOWN button operations.
Step-by-step instructions for setting up the TDR 350 meter.
Procedures for properly taking soil moisture measurements.
Describes the information shown on the startup and main reading displays.
Explains icons for battery level, Bluetooth, and GNSS status.
Settings for clearing averages, rod length, soil type, and data logs.
Settings for Bluetooth, GNSS, Sound, Temperature, and Units.
Options for moisture type, EC units, Auto-Off, Date/Time, Timezone, Calibration, and Defaults.
Enables or disables geo-referencing of soil measurements.
Manages GNSS power consumption and QZSS satellite system usage.
Guides on how to manually set or update the device's date and time.
Explains how internal maps improve GNSS accuracy.
Recommendations for achieving optimal GNSS accuracy and data collection.
Steps for safely separating, removing, and reinstalling the display and sensor.
Guide on how to replace the device's AA batteries.
Instructions for removing and replacing the sensor probe block.
Instructions for downloading data logs to a USB flash drive.
Steps to clear all data from the meter's internal memory.
Definitions of all data fields logged by the meter.
Describes Grid Mode and Freeform Mode in the mobile app.
Details 2-D Contour Plot and Trend Report features in SpecConnect.
Steps for activating Bluetooth, opening the app, and setting up courses/sessions.
Procedures for connecting the TDR meter to the app and selecting devices.
Defines VWC, Saturation, Field Capacity, and Permanent Wilting Point.
Explains the TDR technology used for measuring VWC.
Details EC measurement, its role in VWC accuracy, and influencing factors.
Explains the Salinity Index calculation and its application.
Description of the optional IR sensor.
Details of the TDR spacer and pilot hole maker accessories.
Provides formulas for calculating gravimetric water content from samples.
Steps to verify sensor performance in air, water, and sand.
Solutions for issues saving or loading data/firmware from USB.
Troubleshooting steps for resolving the "No Sensor" error.
Steps for copying firmware to a flash drive.
Detailed instructions for performing the firmware update.
Lists required materials and initial setup for calibration.
Step-by-step guide for calibrating the TDR meter.
Standards for Information Technology Equipment safety.
EMC standards for residential and industrial environments.
Standards for spectrum efficiency and hazardous substances.
Safety standards applied for the UK market.
EMC standards relevant to the UK market.
UK standards for spectrum efficiency and hazardous substances.
Statement of compliance with FCC Rules for digital devices.
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