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© 2005 Delta-T Devices Ltd

 

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Cables and Accessories 

 

 

 

 

1.1m 

  

5m 

10m 
25m

 

5m bare end 

Insertion rods are available for installing the SM200 in an augered hole. 

Installation 

 

Surface installation and spot measurements 

 

Clear away any stones.  Pre-form holes in very hard 
soils before insertion. 

 

Push the SM200 into the soil until the rods are fully 
inserted.  Ensure good soil contact.  Best results are 
achieved by inserting the SM200 horizontally. 

 

If you feel strong resistance when inserting the 
SM200, you have probably hit a stone.  Stop, and re-insert at a new location. 

 

Installing at depth 

 

Auger a 45mm diameter hole. ~10° to vertical is 
recommended. 

 

Fit insertion rod to SM200 - remember to pass the 
cable through the insertion rod and fit the connector 
first. 

 

Push the SM200 into the soil until rods are fully 
inserted.  Ensure good soil contact. 

 

Backfill around the insertion rod. 

Alternatively 

 

Dig a trench, and install horizontally (see 

overview

 diagram).

HH2 
cable 

Extension 
cables 

Logger 
cable 

Extension cables can be joined up to 
a recommended maximum of 55m. 

Align the connectors carefully

 

before pushing parts together.  
Screw together firmly to ensure the 
connection is water-tight. 

Power V+

Signal 

Ground

Summary of Contents for SM200

Page 1: ...SM200 Soil Moisture Sensor Quick Start Guide Version 1 3 Delta T Devices Ltd ...

Page 2: ... 2005 Delta T Devices Ltd Page 2 SM200 overview 1 Cables 3 HH2 4 Data Loggers 2 Installation ...

Page 3: ...0 you have probably hit a stone Stop and re insert at a new location Installing at depth Auger a 45mm diameter hole 10 to vertical is recommended Fit insertion rod to SM200 remember to pass the cable through the insertion rod and fit the connector first Push the SM200 into the soil until rods are fully inserted Ensure good soil contact Backfill around the insertion rod Alternatively Dig a trench a...

Page 4: ...een press Set and scroll down to the Soil Type option Press Set again and scroll down to the appropriate soil type use Mineral for sand silt or clay soils or Organic for peaty soils Press Set to confirm this choice Choose the units you want for displaying readings At the start up screen press Set and scroll down to the Display option Press Set again and scroll down to select units Press Set to con...

Page 5: ...ure the GP1 by choosing SM200 from the sensor menu in PC DeltaLINK or Pocket DeltaLINK For configuration details see the GP1 Quick Start Guide DL6 Up to 6 SM200s can be connected to each DL6 with each sensor connected as a single ended powered sensor These details illustrate connection to Channel1 SM200 wiring Colour DL6 terminal Power V Red V Signal White IN Ground Shield IN and 0V Configure the ...

Page 6: ...nd Shield 58 and 61 Configure the DL2e by choosing one of the SM200 sensor codes from the LS2Win sensor library according to your soil type For configuration details see the DL2e User Manual Other data loggers The SM200 should be connected as a single ended powered sensor Configure the logger input as a voltage sensor approximately 0 to 1 0 volts corresponding to 0 to 60 water content see next sec...

Page 7: ... 0 1 V V V V V ε where V is the SM200 output in volts Linearisation table use for SM200 readings from 0 to 1 2 Volts V ε V ε V ε V ε V ε 0 000 1 011 0 120 2 461 0 260 3 442 0 820 5 936 1 150 7 661 0 030 1 447 0 150 2 718 0 310 3 700 0 960 6 586 1 200 8 039 0 060 1 832 0 180 2 946 0 400 4 105 1 040 6 991 1 220 8 264 0 090 2 168 0 220 3 211 0 600 4 953 1 100 7 333 1 800 9 000 Conversion from ε to So...

Page 8: ...amage Keep the SM200 in its protective tube when not in use Take care when attaching cables to ensure that the connectors are clean undamaged and properly aligned before pushing the parts together Screw together firmly to ensure the connection is water tight If the connector is damaged apply a light smearing of silicon grease to maintain sealing Do not pull the sensor out of the soil by its cable ...

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