Spectrum Technologies TDR-150, TDR-250, TDR-350 User Manual

SERVICE BULLETIN NO. 20210204 February 04, 2021

SUBJECT TDRx50 Firmware v2.17 Update
PRODUCT FAMILY FieldScout TDR-250, TDR350, and TDR150 (Item #’s 6250, 6435,

6445)
DETAILS

Spectrum Technologies has released firmware version 2.17 for the TDR-150, TDR-250, and TDR-350 Soil
Moisture Meters. The existing firmware version is reported on the bottom of the display once the TDR is
powered on. Version 2.17 is a service release with a feature update.

Users of the calibration function are encouraged to download this update which adds additional sensor support
to the TDR display. This is the first public release of display firmware for the TDR-250 model.
The firmware release, installation instructions and a full release history is available on the Spectrum website at

www.specmeters.com/firmware.

Firmware Release History:

2.17 02/04/2021

1. Initial public release for TDR-250 models

2. Added support to the User Calibration menu option for present and future releases of sensor firmware.

2.16 12/16/2020

1. Fractional Time Zone support for Australia, India, and others

2. Updated read sequence to improve the speed of reported measurement

3. Improvements to GNSS Power Save feature using response timeout triggering

4. Improved reporting of average count when a prior reading is deleted