EC-,5, 10, 20 User Manual
Contents
1. 2 Unzip the folder EchoCSI zip 3 Locate the file containing SCWin exe It should be in C Program Files Campbellsci SCWin Place the fol lowing files from the unzipped EchoCSI zip folder into the folder with SCWin exe AM1632Z MUX AM416Z MUX EC10 SCS EC101632 SCS EC10416 SCS EC20 SCS EC201632 SCS EC20416 SCS EC5 SCS EC5632 SCS ECH50 Probe User s M anual 4 Collecting Data EC5416 SCS SCWIN DECAGON CNT SCWIN DECAGON HLP N ote If you are not able to find this directory path search for the folder that contains SCWIN exe and place the files into that folder Open up SCWin exe Short Cut If you are using a V 3 copy of LoggerN et there is a tab for SCWin Short Cut on the tool bar Select New to start a new program to read the ECH 0 probes a Select the datalogger you will be using to read the probes b Select the measurement interval a shorter measure ment interval i e 1 sec is sometimes desirable when testing the probes Click on Sensors this should open a new page with a file tree on it Under the Sensors file tree double click on Meteo rological and then select Soil Moisture ECH50 Probe EC 10 and ECH50 Probe EC 20 should appear on the tree along with other soil mois ture probes a If they don t appear check to make sure you have pasted the files above into the correct location Calibration The ECH50 probes come pre calib2. 2mA and at 5V it is 7 8mA For the EC 5 it is 10mA at 2 5V NOTE ECH 0 probes are intended only for use with dataloggers and readout devices which can provide short excitation pulses leaving the probes turned off most of the time Continuous excitation not only wastes battery power but may under certain circumstances cause the probe to exceed government specified limits on electro magnetic emissions ECHO Probe User s M anual 4 Collecting Data NOTE All D ecagon readout devices use either a2 5V or 3V excitation so the remainder of the discussion assumes this as the excitation If other voltages are used adjust ments to the calibration equations provided will be needed Connecting to a Datalogger Connect the wires to the datalogger as shown with the supply wire connected to the excitation the analog out wire to an analog input and the bare ground wire to ground Analog Supply out Ground EXC H L Analog In Datalogger Fig 5 D atalogger configuration Sample Program The following program is an example that can be used with Campbell Scientifics CR10X datalogger and our ECH50 probes at a 2500mv excitation Important N ote M ultiplier and offset in instruction 2 P4 convert mV reading to water content Instruction 7 P37 converts volumetric water content to m3 m 2 A Iso such as the one in 12 ECH50 Probe User s M anual 4 Collecting Data Instruction 4 P89
3. Collecting Data Potting soil The following equations can be used to convert EC 5 out put to water content in potting soil We tested several types of potting soil Sunshine mix Miracle G row Potting Mix and Custom Nursery soil at several salinities and found that VWC is given by q7 24104 Raw 0 393 3 for a D ecagon datalogger or q 10 3 104 mV 0 334 4 for a datalogger with 2500mV excitation Rockwool The EC 5 was calibrated in G rodan Master rockwool with solution electrical conductivities of 0 2 1 0 1 5 2 0 and 4 5 dS m Volumetric water content can be calculated using q 6 28 107 Raw 1 37x 104 Raw 0 183 5 for a D ecagon datalogger or q 2 63 10 mV 2 5 07x104 mV 0 0394 6 for a datalogger with 2500 mV excitation NOTE These calibration constants only apply to 2500mV excitations use of these numbers with any other excitation voltage will result in erroneous read ings ECH50 Probe User s M anual 4 Collecting Data Troubleshooting If you encounter problems with the ECH50 probes they most likely will manifest themselves in the form of incor rect Or erroneous readings Before contacting D ecagon about the sensor do the following e Check to make sure the connections to the datalogger are both correct and secure Ensure that your datalogger s batteries are not dead or weakened If you encounter problems that aren t due to the datalog ger please contact D ecagon
4. at 509 332 2756 and at echo decagon com ECHO Probe User s M anual Declarationof C onformity Declaration of Conformity a i aa Application of Council Directive 89 336 EE6 Standards to which conformity EN61326 1998 is declared EN51022 1998 Manufacturer s N ame D ecagon D evices Inc 2365 NE Hopkins Court Pullman WA 99163 USA Type of Equipment ECH 0 dielectric soil moisture probe Model N umber EC 10 EC 20 EC 5 Year of First Manufacture 2001 This is to certify that the ECHO dielectric soil moisture probe manufactured by D ecagon Devices Inc a corpo ration based in Pullman Washington USA meets or exceeds the standards for CE compliance as per the Coun cil Directives noted above All instruments are built at the factory at D ecagon and pertinent testing documentation is freely available for verification 20 ECH50Q Probe User s Manual Index Index PT FF A accuracy 1 C calibration for EC 10 16 r EC 20 16 r EC 5 17 r mineral soil 17 r potting soil 18 or rockwool 18 contact information 2 O D datalogger 2 connecting to 12 requirements 11 sample program 12 declaration of conformity 20 E EC 10 4 EC 20 4 EC 5 4 calibration 17 email 2 e mail address 2 extension cables 7 21 ECH50Q Probe User s Manual Index l installation 8 procedure 8 tips 8 M measurement range 2 mineral soil calibration 17 O orientation of probe 10
5. line 1 increment the input location for the next time through the loop A is applied to the input location by dicking on the input location and typing the letter o 7 CR1LOX Example ECH20 Datalogger Program for CR10X fi Wiring White Excitation Channel 1 H Red Input Single Ended Channel 1 H Black Ground Table 1 Program 01 35 A Execution Interval seconds f Factory calibration equations for ECH20 PH probes convert mV output of ECH20 to A volumetric water content VWC m3 m3 EC 20 VWC EC 10 VWC EC 5 VWC 0 00069 mv 0 29 0 00093 mv 0 376 0 00119 mv 0 400 The multiplier and offset in this example are for the EC 5 1 Excite Delay SE P4 Reps 5 2500 mV Slow Range SE Channel Excite all reps w Exchan 1 Delay 0 01 sec units 2500 mV Excitation Loc Probe_VWC 00119 Multiplier 4 Offset ODINIAOBWNHHE Table 2 Program 02 0 0000 Execution Interval seconds Table 3 Subroutines End Program Probe_VWC W gass ees Imee H HO DTYAURBWNH AO ooo 00000 DDo0d0000000kt Re Co ECH 0O Probe User s M anual 4 Col ecting Data DDDDDDDDDD 200200 SCWin Short Cut Directions Following are instructions for using our SCWin Short Cut program to read EC 5 EC 10 and EC 20 ECH 0 probes 1 Download EchoCSI zip from http www deca gon com appnotes EchoCSIappnote pdf
6. ECH O Soil Moisture Sensor Operator s Manual For Models EC 20 EC 10 and EC 5 Version 5 DECAGON DEVICES Decagon Devices Inc 2365 NE Hopkins C ourt Pullman WA 99163 USA Trademarks EC H20 is a registered trademark of Decagon Devices Inc All rights reserved 2006 Decagon Devices Inc All rights reserved 137105 ECH53O0O Probe User s M anual C onte nts Contents eC Entro d ction Teeri 6 kanaan mam aie a delta 1 Wellomer totais torte APA akan 1 Sp cificatio nS na KAKA eter Kus 1 Contact Information a eels iw dees 2 Warranty Informalion Aswacwhe tact eyed 2 Sellers Liability Gad Usa tama ed ee 2 2 About the ECH20 Probes 4 The EC 10 and EC 20 iG hid wcanseiias 4 Ther EC S te tu ht ae HY a wait OAK etda 4 Probe Features xu aa ha wanes 5 W iring Did OT AMS 7 scat ad KAKA akap ns 5 3 5mm plug wiring AA AA 5 W iring to Non Decagon Dataloggers 6 Extension Gables cieri ea an 7 3 Installing the Probes aa ada 8 PEO CCT UE eip iv an a ek Ea 8 OTIENTAUON 4 HAKA PAG coke MALA Kh 10 Removing the Probe 10 4 Collecting Data erick side sit nwage oho u Datalogger Requirements u Connecting to a Datalogger D Sample Program Gait iw Kien Pia Kaka D SCW in Short Cut Directions 14 CADP TON irasin teak een APAN 5 Probe calibration values 16 ECH53O0 Probe User s M anual C onte nts Troubleshooting aaa am
7. P plug wiring configuration 5 potting soil 18 power requirements 1 probe calibration 15 installation instructions 8 orientation 10 specifications 1 probe orientation 10 program 12 R range 2 removing the probe 10 rockwool 18 22 ECH50Q Probe User s Manual Index S seller s liability 2 Short Cut directions 14 specifications 1 T troubleshooting 19 W warranty 2 wiring diagram 5 wiring diagrams 5 23
8. Probes Fig 3 the white wire is excitation red is output and the bare wire is ground Analog out Red Ground Bare Excitation White Fig 3 3 wire cable wiring configuration Ex tension cables Decagon supplies 50 foot 15 25m and 10 foot 3m extension cables for use with the ECH O probe You can safely connect up to 4 of the 50 foot cables without signal attenuation For most applications you will want to seal the connections from the elements to maintain a good connection and to prevent corrosion ECHO Probe User s M anual 3 Installing the Probes 3 Installing the Probes eee When selecting a site for installation it is important to remember that the soil adjacent to the probe surface has the strongest influence on the probe reading and that the probe measures the volumeric water content Therefore any air gaps or excessive soil compaction around the probe can profoundly influence the readings Also do not install the probes adjacent to large metal objects such as metal poles or stakes This can attenuate the probe s electromag netic field and adversely affect output readings Because the EC 5 has gaps between its prongs it is also important to consider the size of the media you are inserting the probe into It is possible to get sticks bark roots or other material stuck between the probe prongs which will adversely affect readings Finally be careful when insert ing the probes into den
9. a KNA 19 Declarationof Conformity 20 AK AA 21 ECH50 Probe User s M anual 1 Intro duction 1 Introduction AHH Welcome Welcome to the ECH50 Dielectric Aquameter sensors for measuring soil water content These innovative sen sors will enable you to monitor soil moisture accurately and affordably Specifications Measurement Time 10ms milliseconds Accuracy EC 10 and EC 20 04 m3 m3 2496 lt 0 5 dS m With soil specific calibration 02 m3 m3 2 EC 5 at least 0 003 m3 m3 all soils up to 8 dS m With soil specific calibration 02 m3 m3 2 Resolution EC 10 and EC 20 0 002m3 m E C 5 0 001 m3 m3 VWC in mineral soils 0 25 in growing media Power R equirenants EC 10 and EC 20 2 5VDC 2mA to 5VDC 7mA EC 5 3VDC 10mA Output 10 40 of excitation voltage 250 1000mV at 2500mV excitation Operating Environment E C 10 and EC 20 0 to 50 C ECHO Probe User s M anual 1 Introduction EC 5 40 to 60 C Range of Measurement EC 10 and EC 20 0 to saturated VWC EC 5 0 to 100 VWC Probe dimensions EC 20 25 4cm x 3 17cm x 15cm EC 10 14 5cm x 3 17cm x 15cm EC 5 8 9cm x 1 8cm x 0 7cm Cable length 5m standard extension cable available Connector types 3 5 mm plug or stripped and tinned lead wires Datalogger Compatibility not exclusive D ecagon Em5 Em50 and radio enabled versions Campbal Sdentific CR10X 21X 23X CR1000 CR3000 etc Contact Infor
10. mV 0 29 RAW 0 m3 m3 0 000424 x 0 29 EC 10 2500mV 9 m3 m3 0 000936mv 0 376 16 ECH50 Probe User s M anual 4 Collecting Data RAW 0 m3 m3 0 000571 x 0 376 EC 5 The EC 5 is much less sensitive to variation in texture and electrical conductivity because it runs at a much higher measurement frequency Therefore its general calibration equation should apply for all mineral soils up to 8 dS m Tts calibration equations are shown below for mineral soil potting soil and rockwool growing media Mineral Soils According to our tests a single calibration equation will generally suffice for all mineral soil types with electrical conductivities from 0 1 dS m to 10 dS m Volumetric water content q is given by q 8 5 41044 Raw 0 48 1 where Raw is the output from the D ecagon datalogger If you are using a non D ecagon datalogger VWC is given by q 11 9 104 mV 0 401 2 where mV is the output of the probe when excited at 2500 mV Please note that the equation will reach a maximum at 60 volumetric water content VWC in pure water To display data on a scale from 0 to 100 VWC should be modeled with a quadratic equation which would result in a 100 VWC in water but a linear equation fits the mineral soil VWC range as well as the quadratic and linear equations are easier to deal with especially since mineral soil typically saturates at 40 50 VWC ECH 0O Probe User s M anual 4
11. mation To contact D ecagon for customer support or questions E mail echo decagon com Fax 509 332 5158 Telephone US and Canada only 1 800 755 2751 or 509 332 2756 Warranty Information The ECH50 probes have a 30 day satisfaction guarantee and a one year warranty Seller s Liability Seller warrants new equipment of its own manufacture against defective workmanship and materials for a period 2 ECH50 Probe User s M anual 1 Intro duction of one year from date of receipt of equipment the results of ordinary wear and tear neglect misuse accident and excessive deterioration due to corrosion from any cause are not to be considered a defect but Seller s liability for defective parts shall in no event exceed the furnishing of replacement parts F O B the factory where originally manufactured Material and equipment covered hereby which is not manufactured by Seller shall be covered only by the warranty of its manufacturer Seller shall not be lia ble to Buyer for loss damage or injuries to persons including death or to property or things of whatsoever kind including but not without limitation loss of antici pated profits occasioned by or arising out of the installa tion operation use misuse nonuse repair or replacement of said material and equipment or out of the use of any method or process for which the same may be employed The use of this equipment constitutes Buyer s acceptance of the
12. mes with a 3 5mm stereo plug connector This allows for rapid connection directly to Decagon s Em50 and Em logger to the ECH20 Check ECHO Probe User s M anual 2 Aboutthe ECH20 Probes Below is a diagram showing the wiring configuration for this connector Analog ja ma I Ground Excitation Fig 2 ECH 0 plug wiring configuration W iring to No n Decagon Dataloggers Models with stripped and tinned leads are pre configured for connecting to non D ecagon dataloggers Simply wire the lead into the datalogger as described in Connecting to a Datalogger in Chapter 4 If your model uses the standard 3 5mm plug you have two choices when attaching ECH 0 probes to non D eca gon dataloggers First you can clip off the plug on the probe cable strip and tin the wires and wire it directly into the datalogger This has the advantage of creating a direct connection with no chance of the probe becoming un plugged however it then cannot be used in the future with a D ecagon Em50 or Em5 logger The other choice is to obtain an ECH 0 adapter cable from D ecagon The 3 wire probe adapter cable has a connector for the ECH 0 probe jack on one end and three wires on the other end for connection to a datalogger this type of wire is often referred to as a pigtail adapter Both the probe wire and adapter cable wire have the same wire output shown in 6 ECH50 Probe User s M anual 2 Aboutthe ECH20
13. nsert into extremely ECHO Probe User s M anual 3 Installing the Probes compact or dry soil If you have difficulty inserting the probe try loosening the soil somewhat or wetting the soil Never pound it in Orientation The probe can be oriented in any direction However ori enting the flat side perpendicular to the surface of the soil will minimize effects on downward water movement Removing the Probe When removing the probe from the soil do not pull it out of the soil by the cable D oing so may break inter nal connections and make the probe unusable 10 ECH50 Probe User s M anual 4 Collecting Data 4 Collecting Data ee Datalogger Requirements The ECH50 sensors are designed to work most efficiently with D ecagon s 5 channel Em5 Em50 or our ECH 0 Check handheld readout They can however be adapted for use with other dataloggers such as those from Camp bell Scientific Inc for example The ECH O requires an excitation voltage in the range of 2 to 5 volts It produces an output voltage that depends on the dielectric constant of the medium surrounding the probe and ranges between 10 and 50 of the excitation voltage Any data logger which can produce a 2 5 to 5V excitation with approximately 10 millisecond duration and read a volt level signal with 12 bit or better resolution should be com patible with the ECH O probes For the EC 10 and EC 20 probes the current requirement at 2 5V is around
14. rated for most soil types However this general calibration may not be appli 15 ECHO Probe User s M anual 4 Collecting Data cable for all probes and all soil types For example the standard calibrations for the EC 20 and EC 10 probes do not perform in soils with high sand or salt content There fore for added accuracy we encourage our customers to perform soil specific calibrations The calibration equation that you will use depends on where you will be using it If you will be using it with probes connected to anon D ecagon datalogger O R using the SEN value given from the ECH50 Check you will need to use the 2500 mV calibration If you use any D eca gon software D ataTrac ECH O Utility etc or the user calibration menu in the ECH50 Check you will need to use the RAW calibration The difference between the two is the slope constant To increase the resolution of the sensor output D ecagon uses all available increments of the 12 bit number value of 4096 where the measurement is stored Thus the output of the sensors read by the ECH50 Check and D ecagon loggers must be multiplied by 0 61 AND the 2500 mV slope to give the right value Probe calibration values Following is a list of the both the millivolt and RAW cali bration values for the ECH 0 probes where 9 is the vol umetric water content mV is the millivolt output of the probe and where x is the RAW probe output EC 20 2500mV 9 m3 m3 0 000695
15. se soil as the prongs will break if excessive sideways force is used when pushing them in Procedure When installing the ECH50 probe it is best to maximize contact between the probe and the soil There are two methods to accomplish this For the EC 10 EC 20 1 Recommended Use D ecagon Probe Installation Kit to install the probe This kit has a custom shaped blade to make the insertion in the soil then another tool to place the probe into the insertion For deeper installations use an augur to reach the desired depth 8 ECH50 Probe User s M anual 3 Installing the Probes then use the Installation kit with extension rods to install the probe 2 Usea thin implement like a trenching shovel garden ing spade or flat bar to make a pilot hole in the soil Then insert the probe into the hole making sure the entire length of the probe is covered Finally insert the shovel again into the soil a few inches away from the probe and gently force soil toward the probe to pro vide good contact between the probe and the soil For deeper installation excavate down to the level you wish to measure then install the probe as described For the EC 5 1 Insert the probes into the soil making sure that the prongs are buried completely up to the black over molding as shown below The tip of each prong has been sharpened to make it easier to push the probe in be careful with the sharp tips The probe may be difficult to i
16. terms set forth in this warranty There are no understandings representations or warranties of any kind express implied statutory or otherwise includ ing but without limitation the implied warranties of mer chantability and fitness for a particular purpose not expressly set forth herein ECHO Probe User s M anual 2 Aboutthe ECH20 Probes 2 About the ECH50 Probes CC st C HC The EC 10 and EC 20 The ECH O probe measures the dielectric constant of the soil in order to find its volumetric water content Since the dielectric constant of water is much higher than that of air or soil minerals the dielectric constant of the soil is a sen sitive measure of water content The ECH50 probe has a very low power requirement and high resolution This gives you the ability to make as many measurements as you want even hourly over a long period of time like a growing season for example with minimal battery usage The EC 5 The EC 5 varies from its EC 10 and EC 20 cousins Although the principles of measurement are the same its two prong design and higher measurement frequency allows the EC 5 to measure VWC from 0 to 100 and allows accurate measurement of all soil types and a much wider range of salinities ECH50 Probe User s M anual 2 Aboutthe ECH20 Probes Probe Features Circuitry Sensor o Fig 1 ECH 0 probediagam Fig 2 EC 5 probe diagram Wiring Diagrams 3 5mm plug w iring The ECH50 probe co
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