What to do if 'No Sensor' appears on Spectrum Technologies Field Scout TDR 150 Measuring Instruments display?
If the Spectrum Technologies Measuring Instruments display reads 'No Sensor', ensure the probe block is securely plugged into the display.
General| Sensor Type | Time Domain Reflectometry (TDR) |
|---|---|
| Resolution | 0.1% |
| Display | LCD |
| Measurement | Volumetric Water Content |
| Measurement Range | 0% to saturation |
| Rod Length | 3.8 cm |
| Operating Temperature | 0 to 50°C |
| Data Logging | Yes |
Lists the components included in the shipment and notes about the TDR 150 meter.
Initial screen displayed after powering on, showing firmware version information.
Displays measurements, rod size, soil type, and reading count with running average.
Menu for changing device features, setting rod length, and managing log files.
Guide to configuring meter settings via the Settings Menu.
Procedure for correctly inserting probes and taking measurements.
Details on battery status, factors affecting life, and usage estimates.
Option to enable or disable logging geo-referenced locations for soil measurements.
Feature to reduce power consumption between distant soil measurements.
Option to add QZSS geo-referenced locations to soil measurements.
Procedures for setting date and time manually or via GNSS satellites.
Explanation of how the meter builds internal maps to improve geo-referencing accuracy.
Step-by-step instructions for replacing or re-attaching the sensor block.
Procedure for safely replacing the meter's AA batteries.
Instructions for saving logged data to a USB flash drive.
Procedure for clearing all logged data from the meter's internal memory.
Describes data viewing in a customizable grid format within the mobile app.
Describes data viewing using color-coded pushpins on a map in the mobile app.
Defines VWC and related soil moisture levels like saturation and field capacity.
Explains the principle of TDR measurement based on dielectric permittivity.
Defines EC and its relation to soil salinity, measured in mS/cm.
Explains the Salinity Index as a ratio of bulk EC to volumetric water content.
Optional sensor for instantaneous and accurate surface temperature readings.
Accessory to aid in identifying turf green firmness and depth measurement.
Tool to create pilot holes for easier probe insertion in hard soil.
Optional upgrade to unlock GNSS and Bluetooth capabilities.
Formulas for calculating volumetric water content from sample data.
Formulas for calculating gravimetric water content from sample data.
Tests to verify sensor operation using distilled water or saturated sand.
Troubleshooting steps for issues with USB flash drive operations.
Guidance for resolving the "No Sensor" error message.
Step-by-step guide for performing manual calibration of the meter.
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