Campbell EasyAG SDI-12 Instruction Manual
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Campbell EasyAG SDI-12 Instruction Manual

Profile probes
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EasyAG® Profile Probes
February 2015
C o p y r i g h t
©
2 0 0 2 - 2 0 0 9
C a m p b e l l
S c i e n t i f i c ,
I n c .
®
EasyAG
and EnviroSMART
are trademarks of Sentek Pty. Ltd.

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Summary of Contents for Campbell EasyAG SDI-12

  • Page 1 EasyAG® Profile Probes February 2015 C o p y r i g h t © 2 0 0 2 - 2 0 0 9 C a m p b e l l S c i e n t i f i c , I n c .
  • Page 4 (780) 454-2655. Campbell Scientific (Canada) Corp. is unable to process any returns until we receive this form. If the form is not received within three days of product receipt or is incomplete, the product will be returned to the client at the client’s expense.

  • Page 5: Table Of Contents

    Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. General ............... 1 2. Absolute Data ............. 1 3. Relative Data .............. 1 4.
  • Page 6 Installation Procedure ..............B-3 Removing Access Tubes ............... B-12 C. Site Selection............C-1 D. SDI-12 Commands ..........D-1 Figures 8-1. EasyAG SDI-12 Interface ..............5 A-1. SDI-12 Interface Power Connection ..........A-1 A-2. SDI-12 Interface TTL Connection ..........A-1 A-3.

  • Page 7: General

    ® EasyAG Soil Water Content Profile Probes General ® EasyAG probes measure a profile of volumetric soil water content. EasyAG 50 probe measures at 10, 20, 30, and 50 cm. EasyAG 80 probe measures at 10, 30, 50, and 80 cm. TriSCAN versions of these probes also measure soil salinity.

  • Page 8: Salinity

    ® EasyAG Soil Water Content Profile Probes into volumetric soil water content. The measurement unit is volumetric water content (Vol %) or millimetres of water per 100 mm of soil. Acceptable data range for scaled frequencies is >0 to 1.0. Water content measurements using the default calibration range from 0 to 53%.
  • Page 9 ® EasyAG Soil Water Content Profile Probes testing, strong relationships (r =0.9) have been achieved. Refer to the benchmarking section of the Sentek TriSCAN manual. Precise temperature effects on salinity data output are currently unknown. It is however, known that there is a minor positive relationship between VIC and soil temperature.

  • Page 10: Specifications

    ® EasyAG Soil Water Content Profile Probes Specifications Feature EasyAG SDI-12 Maximum cable length to 60 m (200 ft)* logger or third party device Maximum sensors per standard probe Sensor Measuring Principle High frequency capacitance Output Options SDI-12 Protocol options SDI-12 Interface Measuring Principle 16 Bit pulse count Output Resolution...

  • Page 11: Installation

    ® EasyAG Soil Water Content Profile Probes Installation Several configurations are possible when using the EnviroSMART EasyAG Probes with Campbell Scientific dataloggers. Among those configuration are the following: Option 1 (Preferred) Device Function Probe Output scaled frequency Datalogger Store scaled frequency, calculate and store water content...

  • Page 12: Cable Installation

    Example program corresponds to setup example in Appendix A. Sample CR1000 Program Shaded portions of program can be omitted if TriSCAN sensors are not used. ‘CR1000 Datalogger ‘Program Author: Campbell Scientific, Inc. ‘Date: 04-12-06 ‘Description: Program measures 1 EnviroSMART / TriSCAN probe with 8 sensors or 1 EasyAG ‘...
  • Page 13 ® EasyAG Soil Water Content Profile Probes ‘Program Control Variables Dim X ‘Definition of DataTables DataTable (ES1_SF,1,-1) Sample (1,ES1_ID,FP2) Sample (8,ES1_SF(1),FP2) Sample (8,ES1_VIC(1),FP2) Totalize (1,Rain_mm,FP2,False) Sample (1,Irrig_mm,FP2) EndTable DataTable (ES1_WC,1,-1) Sample (8,ES1_WC(1),FP2) EndTable ‘Program BeginProg ‘Set Probe ID ES1_ID = 101 ‘Set Scan Interval Scan (30,Sec,3,0) ‘Preload Inactive Sensor Error (covers all missing sensors)
  • Page 14 ® EasyAG Soil Water Content Profile Probes ‘Load Measurement Failure Errors If ES1_SF(1) = NAN Then ES1_SF(1) = -99999 ‘If probe fails (NAN at first sensor) For X = 1 to 8 step 1 ‘Load -99999 to all sensors If ES1_SF(1) < -9999 Then ES1_SF(X) = -99999 ES1_WC(X) = -99999 ES1_VIC(X) = -99999...
  • Page 15 Soil Water Content Profile Probes Sample CR10X Program Shaded portions of program can be omitted if TriSCAN sensors are not used. ;CR10X Datalogger ;Program Author: Campbell Scientific, Inc. ;Date: 04-12-06 ;Description: Program measures 1 EnviroSMART / TriSCAN probe with 8 sensors or 1 EasyAG TriSCAN probe with 4 sensors.
  • Page 16 ® EasyAG Soil Water Content Profile Probes 3: Z=F x 10^n (P30) 1: -1000 2: 0 n, Exponent of 10 3: 17 -- Z Loc [ ES1_VIC_1 ] 4: End (P95) ;Measure water content scaled frequencies (SF) 5: Beginning of Loop (P87) 1: 0 Delay 2: 5...
  • Page 17 ® EasyAG Soil Water Content Profile Probes ;Load measurement failure errors 13: If (X<=>F) (P89) ;Measurement of 0 at 1st sensor 1: 1 X Loc [ ES1_SF_1 ] ;indicates an inactive probe. 2: 1 3: 0 4: 30 Then Do 14: Z=F x 10^n (P30) ;Set 1st sensor reading to -99999 1: -99999...
  • Page 18 ® EasyAG Soil Water Content Profile Probes 24: Else (P94) ;Otherwise, calculate water content for ;the sensor 25: Z=X-Y (P35) 1: 1 -- X Loc [ ES1_SF_1 ] 2: 29 Y Loc [ C 3: 9 -- Z Loc [ ES1_WC_1 ] 26: Z=X/Y (P38) 1: 9 -- X Loc [ ES1_WC_1 ]...
  • Page 19 ® EasyAG Soil Water Content Profile Probes 35: Set Active Storage Area (P80) 1: 1 Final Storage Area 1 2: 101 Array ID 36: Real Time (P77) ;Midnight = 0000 required by Irrimax Software 1: 1110 Year,Day,Hour/Minute (midnight = 0000) 37: Sample (P70) 1: 8 Reps...

  • Page 20: Care And Maintenance

    11. Acknowledgements Campbell Scientific, Inc. gratefully acknowledges the contribution of Sentek Pty Ltd to concepts, text, and images used in this manual.

  • Page 21: Normalization And Function Test

    Appendix A. Normalization and Function Test Normalization is the setting of the range over which the electronics is effective. This range is bounded by the two extremes of air and water. A.1 Normalization Connect +12 Volts DC and ground to the green connector at the top of the probe as shown in FIGURE A-1.

  • Page 22: Water Content Only

    Appendix A. Normalization and Function Test FIGURE A-3. IPConfig Utility Icon Click “Connect” in the upper right area of the IPConfig window. The software will connect to the probe and set up a configuration window. A.1.1 Water Content Only FIGURE A-4. IPConfig Probe Configuration Window FIGURE A-4 shows an IPConfig Utility Probe Configuration window after normalization is complete on a three-sensor probe with sensors placed at 10, 20, and 30 cm.
  • Page 23 Appendix A. Normalization and Function Test Click on “Auto-detect Sensors” in the lower left corner. Wait until all sensors are auto-detected. If the number of sensors detected does not correspond with the number of sensors on the probe, check to ensure that each sensor is addressed sequentially, beginning with address 1 on the top sensor.

  • Page 24: Triscan Normalization

    Appendix A. Normalization and Function Test A.1.2 TriSCAN Normalization When normalizing TriSCAN sensors for water content, follow the procedure in A.1.1 using distilled or deionized water in step 5. As illustrated in FIGURE A-5, the same procedure is followed when normalizing TriSCAN sensors for salinity.

  • Page 25: Configuration Testing

    Appendix A. Normalization and Function Test A.2 Configuration Testing FIGURE A-6. IPConfig Configuration Test Window Test the configuration by going to the “Configuration Test” tab as shown in FIGURE A-6. Again, with the probe in the access tube, hold the probe in the air, then press “Query All Sensors.”...
  • Page 26 Appendix A. Normalization and Function Test...

  • Page 27: Tube Installation

    Appendix B. Tube Installation B.1 Introduction B.1.1 Soil Suitability EasyAG may be installed into a range of soil types ranging in texture from light sand to heavy clay. It is unsuitable for installation into stony ground where the average stone size is greater than 10 mm. Larger stones may damage the plastic cutting tip of the probe and divert the direction of the insertion.

  • Page 28: Installation Tools

    Appendix B. Tube Installation adjacent to the probe and gently levering the soil against the tube. The spade should be at least 15 cm away from the access tube when this is done to limit any error in the soil moisture detection. The installation should be re-done at another site if correction of air gaps is not progressing well.

  • Page 29: Installation Procedure

    Appendix B. Tube Installation The complete list of items required for the installation of the EasyAG probe: Sledgehammer Soil Auger Stabilization Brace Soil Sampler Polyguide Stabilization Brace Pin (Long) Stabilization Brace Pin (Short) EasyAG Dolly Cable Cable Connector Fair RiteTM Bead Bin for Normalization Screwdriver (flat, small) Screwdriver (Phillip’s Head, Small)
  • Page 30 Appendix B. Tube Installation Put the soil sampler polyguide in place. The stabilization brace is now ready for insertion of the AMS soil sampler. Refer below from Step 5: Preparing the hole as for raised soil bed installation. Option B. Raised Soil Bed Insert each of the four long stabilization brace pins into the holes in the stabilization brace and tighten the wing nuts with light finger pressure.
  • Page 31 Appendix B. Tube Installation The stabilization brace should be firm to the ground without causing significant soil compression. WARNING Do not compress the soil such that normal water infiltration into the soil is likely to be inhibited. This is particularly important on clay soils. Insert the soil sampler polyguide.
  • Page 32 Appendix B. Tube Installation WARNING Do not compress the soil such that normal water infiltration is inhibited. Turn the auger one single complete rotation. Carefully lift the AMS soil sampler directly out of the ground. If you experience difficulties at this point, remove the soil sampler in stages, or obtain extra assistance to avoid back injury.
  • Page 33 Appendix B. Tube Installation Step 3 - Assembling the EasyAG probe Attach the cutting tip to the base of the probe with firm pressure. No glue is required. Step 4 - Inserting the access tube Insert the assembled complete probe into the stabilization brace and push it into the ground in a single gentle movement as far as it will go.
  • Page 34 Appendix B. Tube Installation As the probe enters the prepared hole in the soil, it shaves off a residue that is eventually stored in the cutting tip at the base of the hole. Remove the lid of the top cap and extract the electronics. Place this safely to one side on a clean, dry surface such as a tarpaulin.
  • Page 35 Appendix B. Tube Installation Insert the EasyAG dolly into the top cap and position it on top of the internal access tube. Continue inserting the probe using a sledgehammer until there is a 2.5 cm (1 inch) gap between the base of the top cap and the edge of the stabilization brace tube guide.
  • Page 36 Appendix B. Tube Installation Remove all of the stabilization brace wing nuts. Lift both sections of the stabilization brace to clear the threads of the stabilization brace pins. Separate the two halves of the stabilization brace and remove them. Continue inserting the probe into the ground with gentle blows of the sledgehammer using the EasyAG dolly until the base of the top cap is level with the ground.
  • Page 37 Appendix B. Tube Installation Remove the EasyAG dolly, thread a Fair Rite bead onto a loop in the cable but do not tighten it into place yet (refer to final installation photo for this). Push the cable through the cable gland and attach the wiring according to the diagram in Section 4.

  • Page 38: Removing Access Tubes

    Appendix B. Tube Installation WARNING Ensure that the sealing gasket is in good condition and is positioned correctly. Remove the stabilization brace pins by turning them and pulling upward. Tighten the Fair Rite bead into place. B.4 Removing Access Tubes Removal of access tubes is a relatively easy process in sandy soils.
  • Page 39 Appendix B. Tube Installation WARNING Caution is required here such that the top cap and access tube are not damaged. As no glue is used in the connection of the cutting tip to the probe access tube, the cutting tip section can be removed for easy cleaning using one of the long stabilization brace pins.
  • Page 40 Appendix B. Tube Installation B-14...

  • Page 41: Site Selection

    Appendix C. Site Selection Site selection is a critical process for all soil water sensors. A properly selected site will reflect changes in soil moisture and plant water use trends over a larger area. This area may be an entire field, sub-section of a field, a crop variety, a planting, a soil type, etc.
  • Page 42 Appendix C. Site Selection...
  • Page 43 SDI-12 protocol. A complete treatment of SDI-12 communications for the EasyAG is available from Sentek or Campbell Scientific in the EnviroSMART & EasyAG SDI-12 Probe Interface Manual. Commonly used commands are listed below. Refer to Edlog and CRBasic help for information on how to use these commands while programming Campbell Scientific dataloggers.

  • Page 44: Sdi-12 Commands

    Appendix D. SDI-12 Commands...

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