Spectrum Technologies Fieldscout TDR 350 User manual

1
“To Measure Is To Know”“To Measure Is To Know”
FieldScout® TDR 350 Soil Moisture Meter
Product Manual
[e-mail] www.specmeters.com 800.248.8873
Item #6435

2
GENERAL OVERVIEW
Thank you for purchasing a FieldScout TDR 350 Soil Moisture Meter. This manual describes the meter’s general features











• 
• 
• 
TDR rods are sold separately
TABLE OF CONTENTS

Product Details.....................................................
Setup.....................................................................

Data Logging & Measurements.........................
Maintenance........................................................


Please read this manual thoroughly before launching the unit.






2







3
PRODUCT DETAILS
Specicaons
Product Dimensions
Characterisc



Display

Descripon

4.3 lb (1.9 kg)





















Diameter......... 0.2" (0.5cm)


4
Display Screens

• Startup
• Reading
• 
Startup Informaon Screen

• 
• Press and hold ON/OFF|BACK
Reading Screen



Sengs Menu Screen


MENU|SELECT
Clear Average*
READ|DOWN
Rod Length
Soil Type
• Standard
• Hi-Clay
• Sand
Clear Logs*
Save to USB*
Backlight
Sound
GNSS Locaon, GNSS Power Save, GNSS Use QZSS: 
Bluetooth: 
Temp Source: 
Temp Units:
EC Units: 

5
Moisture Type
• 
• 
• 
Auto-O
Current Date, Current Time
Time Zone
Daylight Savings
Calibraon*
Clear User Calibraon
Factory Defaults*
*Pressing Select buon for these opons brings up addional screen
About
Defaults
Oponal Accessories


Infrared Temperature Sensor (Item 6435TS)

TDR Spacer (Item 6435SP)
•  

• 
• 
Pilot Hole Maker (Item 6430PH)

of the probe rods.
1-Year SpecConnect FieldScout Pro Subscripon





Disabled
Fahrenheit
Rod Length
Soil Type
Sound
Backlight, GNSS, BT
Moisture Type
EC Units
Not Set
Standard
ON


Auto-O
Time Zone
15 minutes
GMT
Temperature Temp Source Soil Sensor

6
SETUP
GNSS (Locaon) Sengs




GNSS Locaon
Enabled
Disabled

GNSS Power Save
Enabled

Disabled

GNSS Use QZSS
Enabled (Default)
surrounding areas.
Disabled
GNSS Locaon: Features, Use and Operaon

mapping.
HDoP:


Sats:

Locaon Reference Arrow Icon:

Blank Icon -

Parally Shaded - 

Dark Shaded -

Dark Shaded with Blank Dot -

Dark Shaded with Crosshair -

Clock Icon (HDoP Z.zz) - 




Inal Use:




Preparing for Measurements:



For Best Results:
• 
• 

• 
• 
number.
• 
• 

• 
• 

FieldScout Mobile App/SpecConnect



Basic Grid Mode


Freeform Mode










SCAN TO DOWNLOAD





FieldScout Mobile App: Set Up and Use

1. 
2. Open the FieldScout mobile app
3. 

4. 
5. 
6. 
7. 
8. Tap the Connect FieldScout Device via Bluetooth

9. 
10. 

11. Press the READ
Note: Although the device appears in the app, it may not appear on the phone’s list of Bluetooth devices







Readings Screen
 

9
OPERATIONS
Buon Funcons
Seng Date/Time


Note: When the baeries are removed, the date and me are reset and the meter resumes geng this informaon from
the satellites
Updang the Date and Time
1. Press the MENU|SELECT
2. Press the UPDOWNCurrent Date or Current Time
3. Press the MENU|SELECT
4. Press the READ|DOWN
of the sky
5. Press the MENU|SELECT
6. Press the DELETE|UP
7. UPDOWN
8. Press the MENU|SELECT
9. MENU|SELECT
10. Press the ON/OFF|BACK
ON/OFF|BACK 
• 
• 
• 
• 
MENU|SELECT
• Press to enter menus
• 
DELETE|UP
• 
• 
READ|DOWN
• 
• 
• 

10
Meter Operaons
Probe Base, Thumb Screw and Probe Rods
Seng Up the Meter
1. 
2. 
3. 
4. 
5. 
Taking Readings
1. 
2. 



3. Press the READ
DATA LOGGING & MEASUREMENTS
Data Logs
Downloading Data Logs to a USB Flash Drive
1. 
2. 

3. Press the MENU|SELECT
4. Press the READ|DOWNSave to USB
5. Press the MENU|SELECT
6. 
7. 



Erasing the Internal Data Log
1. Press the MENU|SELECT
2. Press the READ|DOWNClear Logs
3. Press the MENU|SELECT
4. Press the MENU|SELECTON/OFF|BACK

11
Time
VWC%
Period
Rod Length
Soil Type
VWC Mode

the Time Zone



Depicted as Long (LMST
0.5" Spacer (12)
Depicted as Standard (SH) or Sand (D)
V) or
3)
EC 
Temp_Soil 
Temp_Soil (F) Soil temperature sensor reading in degrees Fahrenheit
Temp_IR 
Temp_IR (F) InfraRed soil temperature sensor reading in degrees Fahrenheit
Latude, Longitude 
Note: A negave sign may appear indicang South or
West coordinates
Satellites 
Fix 


HDoP 
GNSS coordinates
Data Collected

VWC Measurements
Volumetric Water Content (VWC)


Saturaon:
Field Capacity:

Permanent Wilng Point:
Plant Available Water:

Time Domain Reectometry (TDR)








Electrical Conducvity





12







Salinity Index










MAINTENANCE
Meter Care

NOT


• 
• 
• 
Baery Life





Display and Sensor Separaon
1. 
2. Flip the display so the backing plate is facing up
3. 
4. Gently separate the display from the base plate

Baery Replacement
1. 
2. 
3. 
Display Removal
1. 
2. 

Do not discard the foam spacer

13
Display Installaon
1. 
2. 
cable molding.
3. 
4. 
5. 
number label.
6. 
Sensor Block Removal/Replacement
1. Display Removal
2. 
3. 
4. 

5. Display Installaon to complete the replacement.
UPDATING & CALIBRATION
Updang Device Firmware


1. 

2. 
3. 
4. 
5. DELETE|UPON/OFF|BACK
and the screen should stay blank.
6. 


Spectrum logo.
7. 
8. 
Soil-Specic Reading Correlaon




1. 
2. 
3. Obtain FieldScout TDR period reading at each sample site
4. 
5. 
6. 
7. Plot sample measurements against FieldScout TDR readings

Volumec Water Content Calculaons   Where
drytot) M Mdry
Gravimetric Water Constant Calculaonstot
b) p
drydry
pbdrytot

14
Calibraon





1. 

2. 
Note: Well or municipal tap water cannot be substuted
Procedure:
1. 

2. 
3. 
4. Press the MENU|SELECT
5. 
MENU|SELECT
6. 
the sensor base and rods centered in the container. Do not submerge the sensor base.
7. Press the MENU|SELECT

be done for each rod length used.
Troubleshoong






Unable to save data to or load rmware from a USB ash drive


“Sensor Not Detected” appears on the display


“No Sensor” appears on the display


Clock icon appears on the display

Rod Length
VWC %









15
WARRANTY






Form 133 (23-125)
Rev. A 07/2023

3600 Thayer Court
Aurora, IL 60504
800.248.8873
www.specmeters.com