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Campbell CS650, User Manual

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Campbell CS650 User Manual Download Page 40

CS650 and CS655 Water Content Reflectometers  

28 

To obtain m

dry

, weigh the tray containing the soil after drying.  Subtract tray mass 

for m

dry

.  Calculate gravimetric water content, 

g

, using 

g

wet

dry

dry

m

m

m

 

To obtain soil bulk density, use 

bulk

dry

cylinder

m

volume

 

Volumetric water content is calculated using 

v

g

bulk

*

 

Summary of Contents for CS650

Page 1: ...CS650 CS655 Soil Water Content Reflectometers Issued 24 6 15 Copyright 2011 2015 Campbell Scientific Inc Printed under licence by Campbell Scientific Ltd CSL 912 USER MANUAL...

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Page 3: ...er the repair is under guarantee or not Please state the faults as clearly as possible and if the product is out of the guarantee period it should be accompanied by a purchase order Quotations for rep...

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Page 5: ...digital cell phones and aerials may also not be applicable according to your locality Some brackets shields and enclosure options including wiring are not sold as standard items in the European marke...

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Page 7: ...ore beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit...

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Page 9: ...Driver Installation 12 8 1 1 2 RS 232 Wiring 12 8 1 1 3 Powering the Sensor 13 8 1 1 4 Determining which COM Port the A200 has been Assigned 13 8 1 2 Device Configuration Utility DevConfig 13 8 1 2 1...

Page 10: ...Same Control Port B 1 B 1 3 CR1000 with 12 CS650 Probes on Multiplexer B 2 B 2 CR200X with Three CS650 Probes B 3 C Discussion of Soil Water Content C 1 D SDI 12 Sensor Support D 1 D 1 SDI 12 Command...

Page 11: ...8 2 Real Time Measurements 16 8 3 CS650 Terminal Commands 18 8 4 CS650 SDI 12 Commands 19 9 1 Symptom Cause and Solutions 29 B 1 CR1000 Wiring for One Probe Example Program B 1 B 2 CR1000 Wiring for T...

Page 12: ...iv...

Page 13: ...loggers For Edlog datalogger support see an older manual at www campbellsci com old manuals or contact a Campbell Scientific application engineer for assistance 2 Cautionary Statements READ AND UNDERS...

Page 14: ...sing Short Cut to program the CS650 1 Install Short Cut by clicking on the install file icon Get the install file from either www campbellsci com the ResourceDVD or find it in installations of LoggerN...

Page 15: ...Water Content Reflectometer Four options are available that monitor different parameters In this tutorial we ll select CS650 CS655 Water Content Reflectometer VWC EC T P PA and VR Click to move the s...

Page 16: ...Programming Steps 8 If LoggerNet PC400 RTDAQ or PC200W is running on your PC and the PC to datalogger connection is active you can click Finish in Short Cut and you will be prompted to send the progra...

Page 17: ...istor in contact with one of the rods It is well known that transmission line oscillators used for water content measurements suffer from unwanted increases in oscillation period as increasing electri...

Page 18: ...res Larger sample volume reduces error Measurement corrected for effects of soil texture and electrical conductivity Estimates soil water content for a wide range of mineral soils Versatile sensor mea...

Page 19: ...y compliant EMC compliant performance criteria available upon request Meets EN61326 requirements for protection against electrostatic discharge and surge External RF sources can affect CS650 measureme...

Page 20: ...longer average current drain may be approximated at 0 15 milliamps per sensor 6 2 Operational Specifications Table 6 2 provides the operational specifications Table 6 2 Relative Dielectric Permittivit...

Page 21: ...ame material The precision of the CS650 is better than 0 05 volumetric water content and 0 01 dS m electrical conductivity 7 Installation If you are programming your datalogger with Short Cut skip Sec...

Page 22: ...should be kept as close to parallel as possible when installed to maintain the design wave guide geometry The probe is more sensitive to permittivity close to the rods so probes inserted in a manner w...

Page 23: ...quisition needs are more complex the files that Short Cut creates are a great source for programming code to start a new program or add to an existing custom program Short Cut cannot edit programs aft...

Page 24: ...f the A200 has not been previously plugged into your PC and your PC operating system is not Windows 7 the A200 driver needs to be loaded onto your PC Drivers should be loaded before plugging the A200...

Page 25: ...hat is free However if other devices have been installed in the past some of which may no longer be plugged in the A200 may be assigned a higher COM port number To check which COM port has been assign...

Page 26: ...opriate PC serial port from the list of available COM ports shown when the browse button on the lower left is selected see Section 8 1 1 4 Determining which COM Port the A200 has been Assigned p 13 Se...

Page 27: ...error message DevConfig polls the CS650 every two seconds while connected and the results are displayed in the Real Time Measurements field Table 8 2 This is useful for verifying probe performance De...

Page 28: ...electric Permittivity PA S Period Average VR Voltage Ratio 8 1 2 2 Send OS Tab The Send OS tab is used to update the firmware in the CS650 The firmware is available at www campbellsci com downloads Th...

Page 29: ...l Tab The Terminal tab may be used to send serial commands directly to the CS650 See Table 8 3 for a list of serial interface commands To send a command from the Terminal tab left click in the field t...

Page 30: ...re m3 m3 dS m C 1 1 Permittivity 2 Electrical Conductivity 3 Temperature dS m C 2 1 Period 2 Voltage Ratio 3 Temperature Sec C 3 1 Volumetric Water Content 2 Electrical Conductivity 3 Temperature 4 Pe...

Page 31: ...Period 6 Voltage Ratio m3 m3 dS m C Sec aM4 aM9 No Values Returned Returns the SDI 12 Address aI CampbellSci OS version Product Serial Number Up to 10 CS650 probes may be connected to the same datalog...

Page 32: ...n line in which the wave propagation velocity is dependent upon the dielectric permittivity of the media surrounding the rods An ECL oscillator state change is triggered by the return of a reflected s...

Page 33: ...extraction methods to separate the solution from the solid and then measuring the electrical conductivity of the extracted solution The relationship between solution and bulk electrical conductivity c...

Page 34: ...ved by using insertion guides or a pilot tool Campbell Scientific offers the CS650G insertion tool 8 3 5 Temperature Dependence and Correction The two temperature dependent sources of error in CS650 w...

Page 35: ...In these cases the user may develop a calibration equation to convert CS650 permittivity to volumetric water content over the range of water contents the probe is expected to measure 8 4 2 User Deriv...

Page 36: ...ter content and include data sets from the highest and lowest expected water contents The measurement sensitive volume around the probe rods must be completely occupied by the calibration soil Only so...

Page 37: ...brium record the CS650 permittivity Take subsamples of the soil using containers of known volume This is necessary for measurement of bulk density Copper tubing of diameter 2 5 cm 1 in and length abou...

Page 38: ...data sets Consider the expected range of soil water content and include data sets from the highest and lowest expected water contents Collecting measurements of CS650 permittivity and core samples fr...

Page 39: ...bulk dry cylinder m volume the dry mass of the sample is divided by the sample tube volume The volumetric water content is the product of the gravimetric water content and the bulk density v g bulk Th...

Page 40: ...mdry weigh the tray containing the soil after drying Subtract tray mass for mdry Calculate gravimetric water content g using g wet dry dry m m m To obtain soil bulk density use bulk dry cylinder m vol...

Page 41: ...so that they match or all values read NAN if the program examples in this manual are followed CS650 green wire not attached to SDI port specified in datalogger program Connect wire to correct control...

Page 42: ...hase electrical conductivity water content and surface conductivity on bulk soil electrical conductivity Soil Sci Soc Am J 40 651 653 Rhoades J D N A Manteghi P J Shouse W J Alves 1989 Soil electrical...

Page 43: ...he Short Cut program 2 Open CRBasic Editor 3 Click File Open Assuming the default paths were used when Short Cut was installed navigate to C CampbellSci SCWin folder The file of interest has a CR6 CR2...

Page 44: ...Appendix A Importing Short Cut Code A 2...

Page 45: ...ts VWC m 3 m 3 Units EC dS m Units TSoil deg C DataTable DatoutCS650 1 1 DataInterval 0 60 Min 2 Average 3 CS650 1 FP2 False Sample 3 CS650 4 IEEE4 EndTable BeginProg Scan 15 Min 0 0 SDI12Recorder CS6...

Page 46: ...ity period average and voltage ratio All probes are addressed with SDI 12 address of 0 In this example the probes are powered through the switched 12V channel and require 3 seconds warm up time per pr...

Page 47: ...res three CS650 probe on a CR200X every 15 minutes storing hourly averages of volumetric water content electrical conductivity soil temperature permittivity period average and voltage ratio The CS650s...

Page 48: ...ple Programs B 4 CS650 1 SDI12Recorder CS650 1 0M3 1 0 CS650 2 SDI12Recorder CS650 7 1M3 1 0 CS650 3 SDI12Recorder CS650 13 2M3 1 0 SWBatt 0 Remove power from CS650 s CallTable CS650 Call Data Table N...

Page 49: ...ater then weighing the dried soil mdry g water soil wet dry dry m m m m m Volumetric water content v is the volume of liquid water per volume of soil Volume is the ratio of mass to density b which giv...

Page 50: ...Discussion of Soil Water Content C 2...

Page 51: ...ndard forms and terminate with CR LF carriage return line feed SDI 12 commands supported by the CS650 are listed in Table D 1 Continuous and concurrent measurements are not supported Table D 1 CS650 S...

Page 52: ...hen one or more subsequent D commands are issued Start Measurement Command aMv Qualifier v is a variable between 1 and 3 that requests variant data Variants include different subsets of the CS650 prob...

Page 53: ...e the address by connecting a single CS650 to an SDI 12 compatible control port on a datalogger and utilizing SDI 12 transparent mode to send commands directly to the sensor D 2 1 SDI 12 Transparent M...

Page 54: ...s Mode box is checked and enter the command SDI12 enter The response SDI12 indicates that the CS650 is ready to accept SDI 12 commands 5 To query the CS650 for its current SDI 12 address key in enter...

Page 55: ...here the CS650 green lead is connected and enter The response Entering SDI12 Terminal indicates that the CS650 is ready to accept SDI 12 commands 5 To query the CS650 for its current SDI 12 address ke...

Page 56: ...entific Centro Caribe S A CSCC 300N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc Campbell Scientific Ltd CSL 80 Hathern Road Shepshed Lough...

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