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Part 1—The Diviner 2000 display unit and probe

Calibrating Diviner 2000

Page 14

ACN 007 916 672



Sentek Pty Ltd

Ø

To adjust the LCD contrast

1.

Use the up/down arrow keys to move the cursor to the

LCD contrast

field.
The

LCD Contrast

function is highlighted.

2.

Use the left/right arrow keys to adjust the

Screen contrast

for

optimal viewing, indoors or outdoors.

3.

Press

ENTER

to save or use the arrow keys to move on to the next

option.

Adjusting the serial baud rate

Ø

To adjust the serial baud rate

Use the arrow keys to move the cursor to the

Serial Baud rate

field.

The

Serial Baud rate

function is highlighted.

4.

Use the arrow keys to adjust the rate to the desired connection speed
for interfacing with your PC.

5.

Press

ENTER

to save or use the arrow keys to move on to the next

option.

Calibrating Diviner 2000

Before you begin to use Diviner 2000 you must enter a calibration
equation. Diviner 2000 does not automatically generate accurate volumetric
soil water content data for all types of soils. To obtain this information you
need to calibrate Diviner 2000

You calibrate by using either the default calibration equation supplied by
Sentek Pty Ltd or deriving your own customized calibration equation. The
Sentek Pty Ltd supplied equation gives ‘relative data’; your own calibration
equation gives ‘absolute data’. For most users ‘relative data’ is sufficient.

What is the calibration equation?

A calibration equation is a mathematical relationship between Diviner 2000
scaled frequency readings and real volumetric soil water content. It is
determined by Gravimetric Sampling, refer to Appendix C. This
mathematical relationship is described by an equation which has ‘A’, ‘B’
and ‘C’ values. An example is shown in Figure 6.

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Содержание Diviner 2000

Страница 1: ...ented is subject to change without notice Names of programs and computer systems are registered trademarks of their respective companies 1999 2009 Sentek Pty Ltd Diviner 2000 User Guide Version 1 5 All rights reserved Diviner 2000 is a registered name of Sentek Pty Ltd Microsoft Word Microsoft Excel and Windows Explorer are the trademarks of Microsoft Corporation Sentek Pty Ltd ACN 007 916 672 77 ...

Страница 2: ...e determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorientation or relocation of the receiving antenna Connection of the equipment into an outlet on a circuit different from that to which the receiver is connected Consultation with the dealer or an experienced radio TV technician EMC approvals The Div...

Страница 3: ...arting the Diviner 2000 8 Status screen 9 Connecting the probe to the unit 9 Setup mode 10 Setting the time and date 11 Normalizing the sensor 12 Adjusting the vertical scale units inch cm 13 Setting the default screen 13 Adjusting the LCD contrast 13 Adjusting the serial baud rate 14 Calibrating Diviner 2000 14 What is the calibration equation 14 Working with the default calibration equation 15 C...

Страница 4: ...eduling 33 Examples of data and trend interpretation 36 Constructing site specific soil water budgets 45 Part 2 Diviner 2000 Utilities software 47 Before you begin 47 Using online help 47 Using Diviner 2000 Utilities 47 Installing Diviner 2000 Utilities 48 Starting Diviner 2000 Utilities 49 The Diviner 2000 Utilities main window 49 Establishing communications 50 Backing up Diviner 2000 data 52 Res...

Страница 5: ...raph screen 25 Figure 12 To show dashed vertical line 26 Figure 13 Summed graph screen 26 Figure 14 Irrigation management chart 32 Figure 15 To show trends with continuous frequent and infrequent data collection 33 Figure 16 Soil water extraction phases 34 Figure 17 Daily Water changes 37 Figure 18 The active root zone 38 Figure 19 Onset of crop water stress 39 Figure 20 Root zone water extraction...

Страница 6: ......

Страница 7: ...n Arrow bullet Ø Indicates a step by step procedure to follow e g To take a reading Bold text Used to highlight an emphasized word for example Note or Warning This font face Used for the names of modes and software commands e g Setup mode and screen display messages DELETE Screen and key names are reproduced as they appear on the Diviner 2000 display unit and its LCD display Up and down arrow keys...

Страница 8: ...profile to the depth of the probe i e 0 7 meters 1 meter or 1 6 meters 28 inches 40 inches or 65 inches Each reading is a snapshot of the soil moisture content at a specific depth in a particular soil profile The more frequent the readings are taken the more complete the soil moisture data Sentek recommends that all sites are read at least once every 24 hours A series of readings may be interprete...

Страница 9: ...nset of crop water stress crop water use changes e g the effects of different crops varieties ages canopy sizes fruit loads irrigation system performances soil types topographical exposure disease incidents cultural management practices soil salinity changes soil structural problems weather conditions and many other factors crop water use under water logged conditions occurrence and impact of wate...

Страница 10: ... equipment in the protective cases when it is not in use or is being transported Secure equipment for transportation to the field Disconnect Diviner cable from the Display Unit and from the Probe before transportation Always cover connectors with the supplied dust caps when cables are not connected The probe cable dust cap is held in place with interlock fingers To remove the dust cap slide pull b...

Страница 11: ...head water sensing screws Storing the Diviner 2000 The following recommendations should be followed when storing the Diviner 2000 display unit to maintain a high battery life Charge the unit thoroughly prior to storage Recharge the unit monthly to prevent total discharge of the battery Repeat the charging if full charge is not achieved after the first cycle Fully charge the Diviner 2000 display un...

Страница 12: ...sion tool It collects and stores information for up to 99 profiles or soil monitoring sites The display unit Figure 2 Diviner 2000 display unit The display unit has a screen surrounded by a keypad The keypad has four types of press buttons or keys Key type Example Description Function ENTER DELETE SCAN Allows you to enter information delete information enter scan mode Navigation PREVIOUS Allows yo...

Страница 13: ...r cover is illustrated The probe The Probe consists of a metal rod with a probe cap and a sensor at the bottom The connection cable from the Diviner 2000 display unit plugs in to the connector at the top end of the rod Probes are supplied in three scanning lengths 0 7 meters 28 inches 1 meter 40 inches and 1 6 meters 65 inches Markings on the rod when they are aligned with the top of the probe cap...

Страница 14: ...y unit before and after use Ø To charge the Diviner 2000 display unit 1 Turn on the Diviner 2000 display unit 2 Connect the power pack to the Diviner 2000 display unit 3 Verify that the prompt Charging is displayed 4 Turn off the Diviner 2000 display unit and leave to charge The Diviner 2000 display unit is fully charged when charging stops flashing Maximum charge time 4 hours 5 Disconnect the pow...

Страница 15: ...y status displays the current battery charge level When the display unit is connected to the charger the Battery status flashes the word charging Memory status the memory status displays how much memory has been used and how much memory remains Each time readings are taken they are entered into the Diviner 2000 memory The unit stores up to 990 readings A full memory is indicated by a black bar The...

Страница 16: ...nnector does not need to be screwed in and will only fit one way The Diviner 2000 display unit is now connected to the probe You are now ready for setting up Diviner 2000 Setup mode Setup mode is used to configure the Diviner 2000 display unit From the Setup screen you can reset the time and date take air and water raw counts for probe normalization adjust the vertical scale cm or inches set the d...

Страница 17: ...gs indicate when a reading is taken in the field and forms part of the profile reading record Ø To set the time 1 Use the arrow keys to move the cursor to the Time field The Time function is highlighted 2 Enter the current four digit time using the numeric keypad e g 2219 for 10 19 pm The time separator is added automatically 3 Press ENTER to save the new time setting The cursor moves to the date ...

Страница 18: ...se of probes Ø To set the air count 1 Use the arrow keys to move the cursor to the Air Count field The Air count function is highlighted 2 Place the probe inside the sealed normalization tube 3 Hold the probe and normalization tube in the air clear of all solid objects 4 Press ENTER Note The reading is taken over a 10 second interval and the probe must be held in the air for this period 5 If faile...

Страница 19: ...d 3 Use the left right arrow keys to toggle between the metric and imperial options 4 Press ENTER to save or use the up down arrow keys to move on to the next option Setting the default screen This option selects which graph type is displayed after a scan is performed Ø To adjust the default screen 1 Use the up down arrow keys to move the cursor to Default screen field The Default screen function ...

Страница 20: ...ys to move on to the next option Calibrating Diviner 2000 Before you begin to use Diviner 2000 you must enter a calibration equation Diviner 2000 does not automatically generate accurate volumetric soil water content data for all types of soils To obtain this information you need to calibrate Diviner 2000 You calibrate by using either the default calibration equation supplied by Sentek Pty Ltd or ...

Страница 21: ...e 01 If you chose to work with the default calibration equation the data will show relative soil water changes in all soil types except for those on which the equation is based In these soil types the data will show absolute values Relative data Most users use this form of measurement because they are interested in the relative changes in soil water dynamics for their daily irrigation management p...

Страница 22: ...ith the default calibration equation Ø To enter CALIBRATION mode 1 Press CALIBRATE The Calibration Mode screen displays The units will be displayed in imperial inches or metric cm Figure 7 Calibration screen feature means Profile soil profile ID number Datum The Datum is the reference point for sampling depths It is the bottom lip datum plate of the access tube top cap When the Diviner probe is sc...

Страница 23: ...ch when Access tube top cap is 5 cm 2 inch above soil surface Soil type Diviner 2000 allows you to record up to 99 different soil types Your site details may be entered using the storage locations 01 to 99 The symbol is used for default options Constant A B and C values Ø To create a soil profile See page 28 to delete a profile 1 Use the arrow keys to highlight Profile 2 Use NEXT and PREVIOUS to n...

Страница 24: ...dependently determined volumetric soil moisture content values provide the calibration curve This relationship can be a straight line or curve and is described mathematically by the calibration equation Creating a soil profile using customized calibration equations Ø To enter Calibration mode 1 Press CALIBRATE The Calibration Mode screen displays Ø To create a soil profile 1 Use the arrow keys to ...

Страница 25: ... by any stored profile The probe length is set when the first measurement is made Measuring the soil moisture content When your access tubes have been installed you are ready to use the Diviner 2000 to measure soil moisture content Refer to the Access Tube Installation Guide or your local distributor for details on how to install your access tubes You use one of two modes to record the soil moistu...

Страница 26: ...oint Note Start point is at the top of the access tube not the bottom The prompt Insert probe appears 9 Insert the probe at a constant rate to the depth of the profile The display unit will beep as it takes a reading at each 10 cm 4 in interval Note If there is water in the bottom of the access tube an alarm sounds and the following message displays Warning Water in tube Turn off and rectify Dry t...

Страница 27: ...at a manually selected depth Figure 9 Continuous screen Ø To access continuous mode 1 Press the CONTINUOUS mode key Note CONT is used as the on screen abbreviation for the CONTINUOUS mode key The time and date display in the upper portion of the screen feature means Profile the site profile being viewed Depth the vertical depth to which the soil moisture content reading refers single table or the ...

Страница 28: ...s the data available on the Diviner 2000 display unit through the table mode single and summed and single graph and summed graph modes If you interpret the data in the field then you can take steps immediately to schedule irrigation Table mode single and summed Information displayed in this mode may be single or summed The display depends on your selection of either Single or Summed in the feature...

Страница 29: ...in equals the sum of the water content measured at 10 cm 4 in 20 cm 8 in 30 cm 12 in e g 0 30cm 0 100cm Data soil moisture content values single mm 10 cm summed mm depth range In single mode only Mark 1 3 soil moisture levels of interest In summed mode only Full soil moisture level set as an upper point for irrigation Refill soil moisture level set as a re irrigation point a little above the onset...

Страница 30: ...desired value 6 If you make a mistake use the DELETE key to clear the last character entered 7 Use steps 7 9 to alter enter Refill and Marker points 8 Select another mode Note The default depth for the single and summed graph can be set in Table mode 9 Select the desired depth and press ENTER From now on this depth will be displayed when you access single or summed graph Graphs single and summed L...

Страница 31: ...ed depth cm or inches e g 10 cm number next to SINGLE indicates the depth of the reading y axis soil moisture content mm x axis date and month 2 Use the arrow keys to move between PROFILE and SINGLE Note When the screen first appears PROFILE will be highlighted 3 To view another site profile type in the profile ID number using the numeric key pad or use the NEXT and PREVIOUS to scroll through the ...

Страница 32: ...e x axis The soil moisture content is given first followed by the date and time at which the reading was taken 7 Use the up arrow key to return to the top of the screen Summed mode The screen displayed in SUMMED graph mode is similar to that of SINGLE graph mode The information however represents a sum of depth data rather than a single recording point in the profile Note SUMMED appears at the top...

Страница 33: ...he data values may not be displayed if they are well above or below the full or refill points Diviner 2000 establishes a scale in relation to these points If the data is outside this scale you will not see the data values To see the data values you must remove or change in table mode the Full and Refill points 5 Use the left and right arrow keys to move the dashed line across to a desired data poi...

Страница 34: ... until Datum is highlighted 3 Press DELETE three times After the third time a message appears warning that further key presses will result in the selected profile being deleted 4 To delete continue to press DELETE twice Formatting the Diviner 2000 Warning Formatting the Diviner 2000 removes all setup information entered This includes probe normalization all profiles and their data Please backup an...

Страница 35: ...ig Mode screen 3 Highlight Format from the menu using the down arrow key and press Enter UNIT CONFIG MODE File List Format Will power down unit Reset Serial Data Flash RTC Delete Profile Data Are you sure NEXT Yes 4 Press Next to confirm the format The unit will begin formatting Instead of Next you can press Setup to cancel the formatting 5 Once the formatting has completed press Enter to power do...

Страница 36: ...nformation can also be kept on your PC using IrriMAX A chart records three month sets of Diviner 2000 data from one site In this way seasonal data can be recorded from year to year and seasonal trends can be easily identified from one sheet The Irrigation Management Chart can be used to plot separate and summed level readings Soil moisture values have not been included on the y axis The scale has ...

Страница 37: ...e crop when plotting began you can identify water uptake changes at different crop development stages Ø To complete the chart for a separate level graph Note Use the y axis scale on the right hand side of the Irrigation Management Chart to plot irrigation and rainfall events 1 Customize the scale to suit your profiles 2 Start in the left hand corner with the 10 cm layer 3 Plot for the 20 cm below ...

Страница 38: ...ACN 007 916 672 Sentek Pty Ltd Diviner 2000 Irrigation Management Chart Profile No ___ Site Description________________________ Irrigation Scheduling Unit________ Year ______ Crop Age ______ Crop Rootstock__________________ Soil Type _____________ Month Month Month Figure 14 Irrigation management chart ...

Страница 39: ...inimum with additional readings before and after an irrigation and rainfall event This data collection schedule should produce a reasonable soil water trend resolution Figure 15 To show trends with continuous frequent and infrequent data collection The following section shows examples of data and trend interpretation as a result of continuous data collection Readings taken twice daily morning and ...

Страница 40: ...ile is saturated and still draining crop uses readily available water Soil profile stopped draining crop uses readily available water Decline of readily available water onset of reduction in crop yield and or quality Irrigation Soil water storage mm Time Phase 1 Phase 3 Phase 2 Readily available water capacity RAWC Soil water change Drained upper limit DUL Onset of stress PAW Permanent wilting poi...

Страница 41: ...al water and it is the upper limit of moisture held in the soil by capillarity Field Capacity is most important in adjusting the refill amount for a particular soil type and depth of root zone in order to prevent over irrigation The amount of water present during Phase 2 is the difference between the Field Capacity and the Onset of Crop Water Stress It is summed over the plant rooting depth and ca...

Страница 42: ... weather change is only a temporary matter that does not necessarily mean the onset of crop water stress The slowdown of daily soil water changes should correlate only with the starting difficulties of the plant to develop sufficient osmotic pressure to extract soil water from a diminishing soil water reservoir Crop water requirements vary with stage of growth Long term monitoring of plant physiol...

Страница 43: ...he stairs indicates soil water change during the day light hours transpiration and evaporation Only in the first night after irrigation can you see a sloping trend at night indicating the soil profile is still draining Then the nightly trend is flat indicating the soil profile has stopped draining and there is no drainage and crop water use at night The big step indicates an increase of crop water...

Страница 44: ...tly active to 50 cm Root activity is more pronounced at 10 cm 20 cm and 30 cm than 40 cm and 50 cm soil depth Now you can match the irrigation depth to the depth of the crop root zone In doing so you can also work out how much water needs to be applied Note The Diviner display allows you to plot one soil depth level at a time You need to step from depth level to depth level to visualize the differ...

Страница 45: ...ater Below this line the daily use of water is more than 50 less than that used the days above the line The Onset of Crop water Stress line is defined as The soil moisture content in the plant root zone when the first observable slow down of the maximum daily crop water use rate after irrigation or rainfall occurs The concept of Refill Point is a soil water budget level usually a notch above the O...

Страница 46: ...d 70 cm the reason for this pattern could be that the roots are either not present or not involved in contributing water to the crop The depth of the irrigation has only wet the soil profile down to a depth of 30 cm and failed to replenish soil moisture at 40 cm and 50 cm This means the soil moisture content at the bottom of the root zone has not been replaced The depth of the irrigation is not ma...

Страница 47: ...oot zone over irrigation Figure 21 shows the same site as Figure 20 In Figure 21 the depth of the irrigation creates a dramatic increase of soil moisture content down to 70 cm soil depth While Figure 20 shows the active root system extending to 50 cm the pattern in Figure 21 shows wetting past the root zone i e over irrigation Water fertilizer and energy are wasted ...

Страница 48: ...e depth of irrigation replaces the amount of soil water extraction at the bottom of the root zone at the same magnitude as it was removed by the plant A slight hump in soil water increase and not the sharp peak of water drainage from this layer indicates the optimal depth of irrigation If you manage to reproduce on your Irrigation Management Chart the trends shown on Figure 22 then you have found ...

Страница 49: ...Capacity Irrigation to Full Point rather than to Field Capacity replenishes the soil moisture content in the root zone This avoids excessive drainage at the bottom of the root zone and nutrient starvation through leaching to the whole plant root zone Full Point is defined as The soil moisture content after an irrigation which replaces the amount of soil water extraction at the bottom of the root z...

Страница 50: ... 25 shows a slow down of crop water use for four days after an irrigation event This is an example of flood irrigated cotton grown on heavy clay soils showing the symptom of water logging Water logging indicates a soil moisture content usually between the field capacity and saturation threshold where the rate of crop water use is reduced by a limited supply of soil air to the root zone ...

Страница 51: ...indicate depth and duration of total saturation of the soil profile Constructing site specific soil water budgets The previous section describes how to determine Full and Refill Points Now you can construct a soil water budget for optimum crop productivity Ø To construct a soil water budget 1 Enter the Full and Refill points in your diviner 2000 display unit and or your irrigation management chart...

Страница 52: ...Part 1 The Diviner 2000 display unit and probe Irrigation scheduling using Diviner 2000 data Sentek Pty Ltd ACN 007 916 672 Page 46 Figure 26 Soil Water Budget trends ...

Страница 53: ...s available from any section of the software by doing one of the following Press F1 on the keyboard to display online help at the appropriate topic Press SHIFT F1 on the keyboard to display What s This help for the selected screen element Click Help to display help Click and point to a screen element to access What s This help Ø To print a help topic From the File menu of the help window click Pri...

Страница 54: ...ns are overwritten with the backup details Note Information that is not included in the backup is probe air and water counts serial communication and display settings display unit date and time Record air and water counts and store in a safe place with your backup disks Installing Diviner 2000 Utilities Ø To install Diviner 2000 Utilities Windows 1 Start Windows 2 Insert the installation disk into...

Страница 55: ...tilities Ø To start Diviner 2000 Utilities 1 From the Windows Taskbar click and point to Programs 2 Point to Sentek point to Diviner 2000 Utilities and click Diviner 2000 Utilities The Diviner 2000 Utilities window displays If you chose to have Desktop icons installed on your Windows desktop during the installation you can also start Diviner 2000 Utilities by double clicking this icon The Diviner ...

Страница 56: ...splay units The following buttons are common to all tabs on the Diviner 2000 Utilities main window Click this button To close the Diviner 2000 Utilities main window Note If you have made any unsaved changes to the Settings tab you are prompted to save or reject the changes access the Diviner 2000 Utilities online help file Establishing communications The Diviner 2000 display unit is connected to y...

Страница 57: ...trast Serial Baud Rate 01 59 23 Feb 08 167709 124574 10cm 3 9in metric Summed Table 9600 Select mode when done Ø To configure the Diviner 2000 Utilities 1 Select the COM Port to which the Diviner 2000 display unit is connected Up to four communications ports COM1 to COM4 are supported for connection 2 Select the Baud Rate for connection to the Diviner 2000 display unit Note The same rate must also...

Страница 58: ...light Serial Baud Rate in the menu 4 Use the left right arrow keys to select the appropriate baud rate The baud rate setting in Diviner 2000 Utilities Settings must match the baud rate of the Diviner 2000 serial port Start with the highest rate 34800 5 Start the Diviner 2000 Utilities software and select the Settings tab 6 Change the Diviner 2000 Utilities baud rate to match the rate selected in S...

Страница 59: ...utton changes to Cancel Click Cancel to cancel the backup process A status message displays the time of the completed operation Restoring and Exporting data The Restore Export tab is used to restore data from the backup files to the Diviner 2000 display unit export data from the backup files to a text based CSV file Restoring data to the Diviner 2000 The Diviner 2000 display unit must be connected...

Страница 60: ...rt single or multiple profiles each profile is exported as a separate CSV file Each CSV file name is generated automatically based on a nominated base file name For example a base file name of Diviner Backup 02 Mar 1999 csv with profile numbers 2 and 4 selected will generate two files called Diviner Backup 02 Mar 1999 Pro02 csv Diviner Backup 02 Mar 1999 Pro04 csv The data format to be exported ma...

Страница 61: ... backup path corresponds to the file location of your backup files 3 Click Restore to begin the restore process and display connection status Note The Restore button changes to Cancel Click Cancel to cancel the backup process A status message displays the time of the completed operation Ø To export data to a CSV file format 1 From the Restore Export tab of the Diviner 2000 Utilities select the fil...

Страница 62: ...profile number is automatically added to the export file name 5 Select the data format to export The default format is Calibrated Moisture Readings 6 Click OK A message box displays advising you of the outcome of the export process See page 56 Exporting data messages A message displays after attempting to export data to a CSV file The following sample messages are displayed under the conditions de...

Страница 63: ...ound in the destination location which was incompatible with the profile being exported This could be due to incompatible data formats data may belong to different profile incompatible sensor depths data may belong to different profile existing file has been modified manually Using ESW ID Tags The Diviner 2000 Display Unit must be connected to the serial port of the PC before the Refresh View or D...

Страница 64: ...n then Database and browse for a database sdb file that you wish match with the Diviner Display Unit 3 Once you have identified the database select it and click Open 4 Record the Logger ID which appears in the top row of the Logger Tree column 5 Prepare the Diviner 2000 Display Unit and the Diviner 2000 Utilities software for communications as described in Establishing communications on page 50 6 ...

Страница 65: ...d from the Diviner 2000 Display Unit as described in Finding the ESW ID Tag on page 58 2 From the ESW ID Tags tab of Diviner 2000 Utilities highlight the ID Tag you wish to delete from the Diviner 2000 Display Unit 3 Click once on Delete Selected 4 The following warning message will appear Click Yes to delete the selected ID Tag Note ID files can be added to the Diviner later by following the on s...

Страница 66: ...ets 3 Check that the serial cable is not damaged 4 If you have more than one available serial port check the Settings tab of the software and ensure that the port name specified corresponds to the physical connection 5 Make sure that the baud rate for the Diviner 2000 display unit match the baud rate for the Diviner 2000 Utilities 6 Lower the baud rate keeping the baud rates matched and try again ...

Страница 67: ...0 display unit fails to report a full battery status after a 4 hour charging cycle Remove the charger plug from the unit refit the plug and leave for an additional 4 hour charging cycle If the unit does not report a full battery status after three 4 hour charging cycles it is recommended the unit and the charger be returned to your local Distributor for service Ø To undo fatal key errors A fatal k...

Страница 68: ...ing Page 62 ACN 007 916 672 Sentek Pty Ltd A successful scan will never occur if the probe length is shorter than the length of the profile You must either create a new profile or use a probe of the correct length ...

Страница 69: ...Recommended reading Sentek Pty Ltd ACN 007 916 672 Page 63 Recommended reading Greacen E L 1981 Soil Water Assessment by the Neutron CSIRO East Melbourne Victoria Australia ...

Страница 70: ...obe frequency reading responses inside the access tube in soil FS compared with probe responses in air FA and in water FW SF readings usually range between the values 0 and 1 The frequencies in air water and soil are passed through a normalization equation to determine a normalized count or scaled frequency SF defined as SF FA FS FA FW 1 Where FA is the frequency reading in the access tube while s...

Страница 71: ...correlate it very highly to the dynamics of volumetric soil moisture content The capacitance technique in general has potential advantages over traditional nuclear soil moisture monitoring techniques such as the lack of random counting error lighter equipment weights quick responsive readings and no radioactive hazards ...

Страница 72: ...dial distance from the outer wall of the access tube See xx What are the water units For example if the probe provided it has been calibrated reads one millimeter that means there is one millimeter of water content in a 100 mm thick soil slice on a volume basis For that layer and only that layer this amounts to a volumetric soil moisture content of 1 What does 1 or 1 mm volumetric soil moisture co...

Страница 73: ...measurement depth is 25 35 cm 35 45 cm etc If you raise the datum plate of the top cap five centimeters above the ground surface and place the center of the first measuring depth level effectively at five centimeters soil depth the sphere of influence of the depth level measures a soil slice from 0 10 cm For the other depth levels at 10 cm intervals on the probe rod the measurement depth is 20 30 ...

Страница 74: ...ek Pty Ltd Profile 1 Profile 2 Depth H2O Depth H2O 20cm 22mm 20cm 22mm 30cm 25mm Total 35mm 40cm 27mm 50cm 28mm Total 115mm Where The total soil moisture content from 10 to 50 cm is 115 mm Profile 1 The total soil moisture content from 10 to 20 cm is 35 mm Profile 2 ...

Страница 75: ...onding with water The dry site may need the establishment of a fast growing deep rooted crop to dry out the soil profile The distinctions must be clear Refer to installation diagram below 2 At each depth on the probe take three Diviner 2000 raw count readings e g 10cm 20 cm 30cm 3 Calculate the scaled frequency for each sample SF FA FS FA FW 1 Where FA is the frequency reading in the access tube w...

Страница 76: ...centre of the sphere of influence of the sensor field 9 Use a series of platforms to sample at each depth Notes Each sample point has sampling rings driven in by a sledge hammer via a sampling ring tube extension Remove the soil above the sampling depth without compressing the layer to be volume sampled 10 Remove soil samples with sufficient over burden excess soil and trim each core with care usi...

Страница 77: ...rate calibration equations for individual soil layers at a particular depth level The Diviner 2000 can process data using a different calibration equation for each 10 cm depth level increment 16 Type new calibration equation s into the Diviner 2000 display unit using the procedure on page Errors to avoid Calibration for absolute data may incorporate the following errors They must be corrected 1 In...

Страница 78: ...ty 4 In site selection insufficient spread of moisture content between wet moist and dry sampling site to yield data for a suitable calibration curve access tube installation with air gaps and soil compactions 4 In mathematical and statistical procedures errors in calculations using unsuitable curves for the equation ...

Страница 79: ...r manual for backup or archival purposes 1 3 Licensee shall not i sublicense the Software ii reverse engineer decompile or disassemble the Software iii make derivatives modifications or translations of the Software or user manual or iv copy the Software or user manual in whole or in part except as provided in this License II OWNERSHIP AND COPYRIGHT OF SOFTWARE 2 1 Licensee acknowledges that all ri...

Страница 80: ...the ownership interest of Sentek III LIMITED WARRANTY 3 1 Sentek warrants that the media on which the Software is furnished will be free from defects in materials and workmanship under normal use for a period of thirty 30 days from the date of purchase Warranty Period Licensee must notify Sentek in writing of the nonconformance of the Software within the warranty period and return the Software to ...

Страница 81: ...ized to modify this License nor to make statements representations or terms binding on Sentek Any statements representations or terms not made or given directly and expressly by Sentek whether written or oral are not binding on Sentek VI AUDIT Sentek reserves the right to conduct audits to verify Licensee s compliance with this License VII TERM AND TERMINATION Sentek may terminate this License at ...

Страница 82: ...courts in the State of South Australia Australia and each party consents to the jurisdiction of such courts XI SEVERABILITY If any of the provisions or portions thereof of this License are determined to be illegal invalid or unenforceable for any reason then such provision shall be deemed to be stricken for the purpose of the dispute in question and all other provisions shall remain in full force ...

Страница 83: ...ecompile or disassemble the Software iii make derivatives modifications or translations of the Software or user manual or iv copy the Software or user manual in whole or in part except as provided in this License II OWNERSHIP AND COPYRIGHT OF SOFTWARE 2 1 Licensee acknowledges that all rights title and interest to the Software and user manual remain with Sentek The Software and user manual are cop...

Страница 84: ...fects in materials and workmanship under normal use for a period of thirty 30 days from the date of purchase Warranty Period Licensee must notify Sentek in writing of the nonconformance of the Software within the warranty period and return the Software to Sentek within thirty 30 days after such discovery Upon Licensee s return of any media that proves to be defective in materials or workmanship sh...

Страница 85: ...ations or terms not made or given directly and expressly by Sentek whether written or oral are not binding on Sentek VI AUDIT Sentek reserves the right to conduct audits to verify Licensee s compliance with this License VII TERM AND TERMINATION Sentek may terminate this License at any time if Licensee is in breach of any of its terms and conditions Upon termination Licensee will immediately destro...

Страница 86: ...ts to the jurisdiction of such courts XI SEVERABILITY If any of the provisions or portions thereof of this License are determined to be illegal invalid or unenforceable for any reason then such provision shall be deemed to be stricken for the purpose of the dispute in question and all other provisions shall remain in full force and effect XII NOTICES Notices required or permitted by this License m...

Страница 87: ...ner 2000 Backlight 13 battery 9 calibration screen 16 charging 8 connection panel 7 datum value 16 display unit 2 6 formatting 28 memory status 9 overview 2 probe 2 7 scan screen 19 setup screen 11 starting 8 status screen 9 unit config screen 29 video 3 Diviner Utilities configure 51 ESW ID Tags 57 exporting data 53 File formats 47 help 47 installing 48 main window 49 starting 49 version 47 Docum...

Страница 88: ...re 19 Relative data 14 15 Restoring data 55 root zone 3 30 35 36 38 39 40 41 S scaled frequency 14 scan failed 20 Scan continuous 21 mode 13 19 Swipe and go 20 sensor head 5 13 20 serial baud rate 14 Setting air count 12 date 11 default screen 13 LCD contrast 14 serial baud rate 14 time 11 Units 13 water count 12 Setup 10 Single mode 24 Soil water budgets 45 Special codes 2020 28 9990 61 sphere of...

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