The EC-5
Contents
1. eee 12 SCWin Short Cut Directions 14 Calibration Zu 15 EC 20 EC 10 and EC 5 User s Manual Table of Contents Sensor calibration values 16 Troubleshooting eens 18 Declaration of Conformity 20 Index 52 d e een venues EC 20 EC 10 and EC 5 User s Manual 1 Introduction 1 Introduction SS EL Welcome Welcome to the EC 20 EC 10 and EC 5 sensors for measuring soil water content These innovative sensors will enable you to monitor soil moisture accurately and affordably Specifications Measurement Time 10ms milliseconds Accuracy EC 10 and EC 20 04 m m 44 lt 0 5 dS m With soil specific calibration 02 m m 42 EC 5 at least 0 03 m m all soils up to 8 dS m With soil specific calibration 4 02 m m 42 Resolution EC 10 and EC 20 0 002m n EC 5 0 001 m m VWC in mineral soils 0 25 in growing media Power Requirements EC 10 amp EC 20 2 5VDC 2mA to 5VDC 7mA EC 5 2 5VDC 5VDC 10mA Output 10 40 of excitation voltage 250 1000mV at 2500mV excitation Operating Environment EC 10 and EC 20 0 to 50 C EC 5 40 to 60 C EC 20 EC 10 and EC 5 User s Manual 1 Introduction Range of Measurement EC 10 and EC 20 0 to 40 VWC EC 5 0 to saturation Sensor dimensions EC 20 25 4cm x 3 17em x 15cm EC 10 14 5cm x 3 17em x 15cm EC 5 8 9cm x 1 8cm x 0 7cm Cable length 5m standa2. allows the EC 5 to measure VWC from 0 to 100 VWC of saturated soils is generally 40 60 depending on the soil type and allows accurate measurement of all soils and soilless medias and a much wider range of salinities EC 20 EC 10 and EC 5 User s Manual 2 About the EC 20 EC 10 EC 5 Sensor Features Circuitry Sensor o Fig l EC 20 diagram Fig 2 EC 5 diagram Wiring Diagrams The EC 20 EC 10 and EC 5 come with a 3 5mm ste reo plug connector This allows for rapid connection directly to Decagon s Em50 and Em5 logger and the EC 20 EC 10 and EC 5 User s Manual 2 About the EC 20 EC 10 EC 5 ECH 0 Check Below is a diagram showing the wiring configuration for this connector Analog q uU E Ground Excitation Fig 2 3 5mm Stereo Plug wiring configuration Wiring to Non Decagon Dataloggers Models with stripped and tinned leads are pre config ured for connecting to non Decagon dataloggers Sim ply 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 the sensor to non Decagon dataloggers First you can clip off the plug on the sen sor 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 sensor becom ing un plugged however it then cannot be
3. Instruction 7 P37 converts volumetric water content to m m 12 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data Also such as the one in Instruction 4 P89 line 1 increment the input location for the next time through the loop A is applied to the input location by clicking on the input location and typing the letter 33 C CR10X Example ECH20 Datalogger Program for CR10X A Wiring G White Excitation Channel 1 Red Input Single Ended Channel 1 Black Ground Table 1 Program OlrUT Execution Interval seconds Factory calibration equations for ECH20 probes convert mV output of ECH20 to 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 H 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 2 2500 mV Excitation Loc Probe_VWC 00119 Multiplier i cd Offset 0 10 01 4 QN Hr Table 2 Program 02 0 0000 Execution Interval seconds Table 3 Subroutines End Program SCWin Short Cut Directions Following are instructions for using our SCWin Short Cut program to read EC 5 EC 10 and EC 20 soil mois ture sensors 13 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data 1 Download EchoCSI zip from htt
4. A UMS measure to know Operator s Manual 60 13 6029069 Use I nee Meee 1OSUES 94N4S10W S 5 J OH 5 J EC 5 EC 10 20 Water Content Sensor UMS GmbH M nchen Art Nr 10HS Version 08 Author Decagon A UMS measure to know 2008 Decagon Devices Inc All rights reserved Decagon Devices Inc 2365 NE Hopkins Court Pullman WA 99163 www decagon com Vertreten in Deutschland durch UMS GmbH Gmunderstr 37 D 81379 Munchen Tel 49 0 89 12 66 52 0 Fax 49 0 89 12 66 52 20 ums ums muc de www ums muc de Ansprechpartner Thomas Keller Durchwahl 19 tk ums muc de EC 20 EC 10 and EC 5 User s Manual Table of Contents Contents 1 Introduction 1 Welcome Susi ce 1 Specifications ss 1 Contact Information 2 Warranty Information 2 Seller s Liability lees 2 2 About EC 20 EC 10 EC 5 4 The EC 10 and EC 20 4 TheEC 5 nen 4 Sensor Features eee eee 5 Wiring Diagrams eese 5 3 5mm plug wiring 006 5 Wiring to Non Decagon Dataloggers 6 Extension cables 2 5 v sis rk a aes 7 3 Installing the Sensors 8 Procedure 4 ee tee ae 8 Orientation 3v ae 10 Removing the Sensor 10 4 Collecting Data 11 Datalogger Requirements 11 Connecting to a Datalogger 12 Sample Program
5. a pilot hole in the soil Then insert the sensor into the hole making sure the entire length of the sensor is covered Finally insert the shovel again into the soil a few inches away from the sensor and gently force soil toward the sensor to provide good contact between the sensor and the soil 8 EC 20 EC 10 and EC 5 User s Manual 3 Installing the Sensors For deeper installation excavate down to the level you wish to measure then install the sensor as described For the EC 5 1 The EC 5 sensor was designed for easy installation into the soil After digging a hole to the desired depth push the prongs on the sensor into undisturbed soil at the bottom of the hole or into the sidewall of the hole Make sure that the prongs are buried completely up to the black overmolding as shown below The sensor may be difficult to insert into extremely compact or dry soil If you have difficulty inserting the sensor try loosening the soil somewhat or wet ting the soil Never pound it in Carefully backfill the hole to match the bulk density of the surrounding soil Be careful not to bend the black overmolding connecting the sensor to the cable EC 20 EC 10 and EC 5 User s Manual 3 Installing the Sensors Orientation The sensor can be oriented in any direction However orienting the flat side perpendicular to the surface of the soil will minimize effects on downward water move ment Removing the Sensor W
6. and EC 5 where 0 is the volumetric water content mV is the milli volt output of the sensor and where x is the RAW sensor output EC 20 2500mV 0 m m 0 000695mV 0 29 RAW 0 m m 0 000424 x 0 29 EC 10 2500mV 0 m m 0 000936mV 0 376 RAW 0 m m 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 Its calibration equations are shown below for mineral soil potting soil and rockwool growing media 16 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data 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 is given by 8 8 5 10 Raw 0 48 1 where Raw is the output from the Decagon datalogger using 3V excitation If you are using a non Decagon datalogger VWC is given by 11 9 10 mV 0 401 2 where mV is the output of the sensor 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 fit
7. h 12 bit or better resolution should be compatible with the EC 20 EC 10 and EC 5 sensors For the EC 10 and EC 20 sensors the current requirement at 2 5V is around 2mA and at 5V it is 7 8mA For the EC 5 it is 10mA at 2 5V NOTE EC 20 EC 10 and EC 5 are intended only for use with dataloggers and readout devices which can provide short excitation pulses leaving the sensors turned off most of the time Continuous excitation not only wastes battery power but may under certain cir cumstances cause the sensor to exceed government specified limits on electromagnetic emissions T1 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data All Decagon readout devices use either a 2 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 Analo Supply out Ground Datalogger Fig 5 Datalogger configuration Sample Program The following program is an example that can be used with Campbell Scientific s CR10X datalogger and our EC 20 EC 10 amp EC 5 sensors at a 2500mV excitation Important Note Multiplier and offset in instruction 2 P4 convert mV reading to water content
8. hen removing the sensor from the soil do not pull it out of the soil by the cable Doing so may break inter nal connections and make the sensor unusable 10 Extending sensor cables with UMS M12 cables CC 4 1 5 CC 4 5 CC 4 10 CC 4 20 Supply equates Excitation Supply equates Ground internal connected with Signal Signal equates Analog out UMS plug M12 IP67 brown PIN 1 Supply white PIN2 Signal EM blue PIN3 Supply N black PIN4 Signal Male plug on Female va im on sensor cable connecting cable AL thick black Pin and wire configuration for UMS connecting cable CC 4 UMS GmbH M nchen Art Nr 10HS Version 09 2008 Author Decagon EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data 4 Collecting Data Dn 9a Datalogger Requirements The EC 20 EC 10 and EC 5 sensors are designed to work most efficiently with Decagon s 5 channel Em5b Em50 or ECH O Check handheld readout They can however be adapted for use with other dataloggers such as those from Campbell Scientific Inc for exam ple The EC 20 EC 10 and EC 5 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 sensor and ranges between 10 and 50 of the excitation voltage Any datalogger which can produce a 2 5 to 5V excitation with approxi mately 10 millisecond duration and read a volt level sig nal wit
9. ithout limitation loss of anticipated profits occa sioned by or arising out of the installation operation use misuse nonuse repair or replacement of said mate rial 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 terms set forth in this warranty There are no under standings representations or warranties of any kind express implied statutory or otherwise including but without limitation the implied warranties of merchant ability and fitness for a particular purpose not expressly set forth herein EC 20 EC 10 and EC 5 User s Manual 2 About the EC 20 EC 10 EC 5 2 About the EC 20 EC 10 EC 5 The EC 10 and EC 20 The EC 10 and EC 20 measure 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 sensitive measure of water content The EC 10 and EC 20 have 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 exam ple 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
10. location Calibration Decagon s ECH O Utility ECH O Utility Mobile and DataTrac automatically apply factory calibrations to the sensors output data However this general calibration may not be applicable for all sensors and all soil types While the factory calibrations for the EC 5 is appropri ate for almost all soil types the standard calibrations for the EC 20 and EC 10 sensors do not perform in soils with high sand or salt content Therefore 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 sensors connected to a non Decagon datalogger you will need to use the 2500 mV calibration If you use any Decagon software DataTrac ECH O Utility etc or the user calibration menu in the ECH O Check you will 15 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data need to use the RAW calibration The difference between the two is the slope constant To increase the resolution of the sensor output Decagon uses all avail able increments of the 12 bit number value of 4096 where the measurement is stored Thus the output of the sensors read by the ECHO Check and Decagon loggers must be multiplied by 0 61 AND the 2500 mV slope to give the right value Sensor Calibration Values Following is a list of the both the millivolt and RAW calibration values for the EC 20 EC 10
11. mity 20 E Ec 10 4 Ec 20 4 Ec 5 4 Calibration 16 Email 2 E mail Address 2 Extension Cables 7 21 EC 20 EC 10 and EC 5 User s Manual Index Installation 8 Procedure 8 Tips 8 M Measurement Range 2 Mineral Soil Calibration 16 Oo Orientation Of Sensor 10 P Plug Wiring Configuration 5 Potting Soil 17 Power Requirements 1 Program 12 Range 2 Removing The Sensor 10 Rockwool 18 S Seller s Liability 2 Sensor Calibration 15 Installation Instructions 8 22 EC 20 EC 10 and EC 5 User s Manual Index Orientation 10 Specifications 1 Sensor Orientation 10 Short Cut Directions 14 Specifications 1 T Troubleshooting 18 W Warranty 2 Wiring Diagram 5 Wiring Diagrams 5 23
12. p www deca gon com appnotes EchoCSlappnote pdf Unzip the folder EchoCSI zip Locate the file containing SCWin exe It should be in C Program Files Campbellsci SCWin Place the fol lowing files from the unzipped EchoCSLzip 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 EC5416 SCS SCWIN DECAGON CNT SCWIN DECAGON HLP Note f 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 LoggerNet there is a tab for SCWin Short Cut on the tool bar Select New to start a new program to read the EC 20 EC 10 and EC 5 a Select the datalogger you will be using to read the sensors 14 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data b Select the measurement interval a shorter measure ment interval i e 1 sec is sometimes desirable when testing the sensor 6 Click on Sensors this should open a new page with a file tree on it 7 Under the Sensors file tree double click on Meteo rological and then select Soil Moisture 8 ECHO Probe EC 10 and ECHO Probe EC 20 should appear on the tree along with other soil moisture sen sors a If they don t appear check to make sure you have pasted the files above into the correct
13. rd extension cable available Connector types 3 5 mm plug or stripped and tinned lead wires Datalogger Compatibility not exclusive Decagon Em5b Em50 and radio enabled versions Campbell Scientific CR10X 21X 23X CR1000 CR3000 etc Contact Information To contact Decagon for questions or customer support E mail us at support decagon com sales decagon com eFax us at 1 509 332 5158 eCall us at 1 800 755 2751 in US and Canada only or 1 509 332 2756 International Warranty Information The EC 20 EC 10 and EC 5 have a 30 day satisfaction guarantee and a one year warranty EC 20 EC 10 and EC 5 User s Manual 1 Introduction Seller s Liability Seller warrants new equipment of its own manufacture against defective workmanship and materials for a period 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 liable to Buyer for loss damage or injuries to persons including death or to property or things of whatsoever kind including but not w
14. s 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 Potting soil The following equations can be used to convert EC 5 output to water content in potting soil We tested several types of potting soil Sunshine mix Miracle Grow Pot ting Mix and Custom Nursery soil at several salinities and found that VWC is given by 0 72 10 Raw 0 393 3 17 EC 20 EC 10 and EC 5 User s Manual 4 Collecting Data for a Decagon datalogger or 10 3 10 mV 0 334 4 for a datalogger with 2500mV excitation Rockwool The EC 5 was calibrated in Grodan 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 cal culated using 628 107 Raw 1 37 x 10 Raw 0 183 5 for a Decagon datalogger or 2 63 109 mV 5 07 x 10 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 Troubleshooting If you encounter problems with the EC 20 EC 10 and EC 5 they most likely will manifest themselves in the form of incorrect or erroneous readings Before contact ing Decagon about the sensor do the following 18 EC 20 EC 10 and EC 5 User s Manual 4 Collec
15. sor reading and that the sensor measures the volumetric water content Therefore any air gaps or excessive soil compaction EC 20 EC 10 and EC 5 User s Manual 3 Installing the Sensors around the sensor can profoundly influence the read ings Also do not install the sensors adjacent to large metal objects such as metal poles or stakes This can attenuate the sensor s electromagnetic 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 sensor into It is possible to get sticks bark roots or other material stuck between the sensor prongs which will adversely affect readings Finally be careful when inserting the sensors into dense soil as the prongs will break if exces sive sideways force is used when pushing them in Procedure When installing the EC 20 EC 10 and EC 5 it is best to maximize contact between the sensor and the soil There are two methods to accomplish this For the EC 10 EC 20 1 Use Decagon s Installation Kit to install the sensor This kit has a custom shaped blade to make the inser tion in the soil then another tool to place the sensor into the insertion For deeper installations use an augur to reach the desired depth then use the Installa tion Kit with extension rods to install the sensor 2 Use a thin implement like a trenching shovel garden ing spade or flat bar to make
16. ting Data eCheck to make sure the connections to the data logger 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 Decagon at 509 332 2756 and at support decagon com 19 EC 20 EC 10 and EC 5 User s Manual Declaration of Conformity Declaration of Conformity Excmo o zz SSS Application of Couneil Directive 89 336 EE6 Standards to which conformity EN61326 1998 is declared EN51022 1998 Manufacturer s Name Decagon Devices Inc 2365 NE Hopkins Court Pullman WA 99163 USA Type of Equipment ECH3O soil moisture sensor Model Number EC 10 EC 20 EC 5 Year of First Manufacture 2001 This is to certify that the EC 10 EC 20 and EC 5 ECH 0 soil moisture sensor manufactured by Decagon Devices Inc a corporation based in Pullman Washing ton USA meets or exceeds the standards for CE compli ance as per the Council Directives noted above All instruments are built at the factory at Decagon and perti nent testing documentation is freely available for verifi cation 20 EC 20 EC 10 and EC 5 User s Manual Index Index A Accuracy 1 C Calibration For Ec 10 16 For Ec 20 16 For Ec 5 16 For Mineral Soil 16 For Potting Soil 17 For Rockwool 18 Contact Information 2 D Datalogger 2 Connecting To 12 Requirements 11 Sample Program 12 Declaration Of Confor
17. used in the future with a Decagon Em50 or Em5 logger The other choice is to obtain an adapter cable from Decagon The 3 wire sensor adapter cable has a connector for the sen sor 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 sensor wire and adapter cable wire have the same wire output 6 EC 20 EC 10 and EC 5 User s Manual 3 Installing the Sensors shown in 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 Extended cable lengths Decagon supplies 50 foot 15 25m and 10 foot 3m extension cables for use with the EC 20 EC 10 and EC 5 with the 3 5 mm connector 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 However if possible Decagon rec ommends that you purchase customized cable lengths if your project requires longer cable leads Custom cable lengths may be requested with a 3 5mm connector or stripped amp tinned end 3 Installing the Sensors SZ When selecting a site for installation it is important to remember that the soil adjacent to the sensor surface has the strongest influence on the sen
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