Spectrum TDR150, TDR250, TDR350 Quick Start Guide

TDR Spacer

Quick Start Guide

Item # 6435SP

The TDR Spacer is used to measure depths of 0.5" (1.3cm) and 1" (2.5cm) with a TDR Soil Moisture Me­ter equipped with 1.5" (3.8cm) turf rods. The spacer is not compatible with other rod sizes.

The block has a small (one-inch orientation) and large (half-inch orientation) cavity. Push the spacer onto
the sensor block such that the desired length of rod is exposed. Tighten the screws on each side to prevent
it from slipping off during use. The screws must always be installed in the upper holes of the spacer.

Spacer with one-inch orientation

3600 Thayer Ct.

Aurora, IL 60503

[phone] or [phone]

Fax [phone]

E-Mail: [e-mail]

www.specmeters.com

04/21

TDR150, TDR250 and TDR350 Meters

The 0.5" and 1" options are automatically available for these meters. In the Settings Menu, select Rod

Length option SPCR 0.5" or SPCR 1.0". Note: Moisture Type must be set for "TDR 300".

TDR100 and TDR300 Meters

The spacer block feature is enabled on the TDR100 and 300 meters by entering an activation code provid­ed by Spectrum Technologies. The meters must be running firmware version 7.0 or greater. Implementing
the activation code will allow the meter to work with the two shorter rod lengths created by the spacer
block. The activation procedure is outlined in a separate document. Items 6430SP and 6430SPU both in­clude the spacer block and 1 activation code. Item 6430SPU also includes a microprocessor chip to up­date the firmware.

On the Rod Length selection screen, choose ROD=T-BLK(0.5in) or ROD=T-BLK(1.0in). If you are using
FieldScout software to download a TDR300 meter, you must be running version 5.02 to save data collect­ed when the spacer block was attached.

Spacer with half-inch orientation