1. Manuals
  2. Brands
  3. Campbell Manuals
  4. Measuring Instruments
  5. DOT600
  6. Instruction manual

Campbell DOT600 Instruction Manual

Roadbed water content meter
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
DOT600 Roadbed
Water Content Meter
1/10
C o p y r i g h t
©
2 0 1 0
C a m p b e l l
S c i e n t i f i c ,
I n c .

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DOT600 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Campbell DOT600

Summary of Contents for Campbell DOT600

  • Page 1 DOT600 Roadbed Water Content Meter 1/10 C o p y r i g h t © 2 0 1 0 C a m p b e l l S c i e n t i f i c , I n c .
  • Page 2 Warranty and Assistance The DOT600 ROADBED WATER CONTENT METER is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty.

  • Page 3: Table Of Contents

    PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. General Description.............1 2. What Parts Comprise the DOT600 ......2 3. Specifications ..............3 4. User Interface for Measurement and Control....4 4.1 The Keypad....................4...
  • Page 4 A.5 Sensitivity of Weight Position on Scale Surface......... A-4 A.6 Soil Water Content Calibration............A-4 A.7 Description of the Test Performed and Factors Which Could Have Effect on Results of DOT600 Measurements........A-5 Figures 1. Cross sectional drawing shows mounting of battery and charger/ regulator beneath panel ..............

  • Page 5: General Description

    DOT600 Roadbed Water Content Meter 1. General Description The DOT600 is a portable device for measuring the water content of soils used in construction of roads, parking lots, foundations, etc. Samples collected from field sites are compacted using a vertical stress of (15-45 PSI), then the water content is measured using dielectric permittivity sensitive methods.

  • Page 6: What Parts Comprise The Dot600

    DOT600 Roadbed Water Content Meter 2. What Parts Comprise the DOT600 DOT600 components are housed in a rugged case. Contained in the case are: 1. Cable to charge DOT 600 from AC power source 2. Sample chamber base 3. Sample chamber cylinder 4.

  • Page 7: Specifications

    The independent method is water content by gravimetric method (weighing sample before and after oven drying). The DOT600 water content measurement uses a calibration to convert sensor output period to volumetric water content. This calibration was derived at the factory for various soil types.

  • Page 8: User Interface For Measurement And Control

    DOT600 Roadbed Water Content Meter 4. User Interface for Measurement and Control The Measurement and Control Datalogger has a built-in ruggedized membrane-switch keypad for control and a display with 8 lines and 21 characters per line. Measurement control uses a hierarchical structure of menus and submenus.

  • Page 9: Project Information

    DOT600 Roadbed Water Content Meter 4.2.1 Project Information A 9-digit alphanumeric value can be entered to identify the project. The current date is automatically set. The project information is written to the measurement report (see Measurement Report section). Data can be displayed in either Imperial or SI units.

  • Page 10: Make Measurements

    4.2.4 System Menu The System Menu allows user access to numerous settings and data. For operation of the DOT600, the only control of interest is System Menu/Configure, Settings/Display. From this menu the user can control the display back lighting, contrast and display timeout to save power. The calibration file can also be edited through this menu, and a list of files stored on the datalogger CPU can be accessed.

  • Page 11: Making Measurements With The Dot600

    5. Making Measurements with the DOT600 Level the DOT600 case using the built-in bubble. Turn DOT600 on and wait for program to compile and Main Menu to appear. After entering Project Information and Test ID Data values as desired, select Make Measurements in the Main Menu.

  • Page 12: Tare Scale

    DOT600 Roadbed Water Content Meter 5.1 Tare Scale Place the empty sample chamber base and cylinder on the scale. The scale is very sensitive. Do not pull up on scale during CAUTION use. Doing so could permanently damage the scale.

  • Page 13: Fill Sample Chamber

    DOT600 Roadbed Water Content Meter 5.2 Fill Sample Chamber On a flat surface away from the case, place the sieve on the sample chamber and fill the sieve with material. Push the material through the sieve using fingers or tool. Do not pack the material into the sample chamber, only fill it.

  • Page 14: Compress Sample And Measure Water Content

    DOT600 Roadbed Water Content Meter Select Measurement, select Weigh Sample. The display will shift to the Make Measurement menu. When the weighing process is complete the net sample weight is displayed next to Weight (g), and the process step will read “weigh”. If an accurate weight measurement is not made within 9 seconds, a “wind error”...
  • Page 15 DOT600 Roadbed Water Content Meter Place the compression cap on the sample chamber by aligning the pins in slots and twist to lock. Turn the compression nut clockwise by hand or with a wrench until you can feel the sample being compressed.
  • Page 16 DOT600 Roadbed Water Content Meter Place the wrench on the compression nut and rotate clockwise. Compress the sample to a desired pressure (PSI), displayed on the logger screen. CAUTION Do not compress sample beyond 45 PSI. NOTE When sample is compressed remove wrench from compression nut and place on foam away from the compression chamber.

  • Page 17: Write Measurement Data To Record

    DOT600 Roadbed Water Content Meter When the target pressure is reached select Measurement, select Sample VWC. Press Enter to measure volumetric water content, VWC record applied pressure measure sample volume calculate sample dry bulk density calculate gravimetric water content, GWC The values are displayed on the logger screen.

  • Page 18: Start New Test

    DOT600 Roadbed Water Content Meter 5.3.2 Start New Test Select Measurement, select New Sample. Press Enter to: zero all temporary values increment test # 5.4 Removing Samples Remove the sample chamber completely from the enclosure. Loosen the compression nut by turning the ratchet in a counter clockwise direction.

  • Page 19: Detailed Description

    6.1 Power System 6.1.1 Battery, Charger and Power Switch A 2.9 Ahr battery and a CH100 charger/regulator (manufactured by Campbell Scientific) are mounted beneath the panel as shown in Figure 1. A wiring harness distributes power and connects the charger to a jack located on the panel in the upper-left corner near the power switch.

  • Page 20: Sample Chamber Volume And Compression Force

    The water content measurement uses a calibration derived by the DOT600 manufacturer using soils with a range of textures. The calibration coefficients are selected using material type. The DOT600 response can be affected by soil salinity in addition to clay content. Soils high in clay and electrical conductivity (greater than about 1.5 deciSiemens/meter) may require a soil...

  • Page 21: Description Of Basic Technology

    Appendix A. Design and Calibration A.1 Description of Basic Technology The DOT600 is based on the design of the DMM600 Duff Moisture Meter also manufactured by Campbell Scientific. Both devices measure volumetric water content of a porous-media sample by placing the sample in a cylindrical sample chamber, compressing the sample to a known compaction and then measuring the water content using a method that is sensitive to dielectric permittivity.

  • Page 22: Description Of The Modified Device

    A.3 Detailed Description of any Field and Laboratory Work Field work The DOT600 has been used in the field to evaluate general operation, and for demonstration. All of the calibration work was done in the laboratory. Description of laboratory calibration...

  • Page 23: Displacement Sensor Calibration

    Appendix A. Design and Calibration Calibrating the DOT600 scale is a simple matter of placing objects of known weight on the scale and recording the output voltage. Precision calibration weights manufactured by Ohaus and checked on an independent scale were used.

  • Page 24: Sensitivity Of Weight Position On Scale Surface

    The calibrations were obtained by independently measuring sample volumetric water content. Soils mixed to a range of water contents were measured in the DOT600 in normal fashion. The cylindrically-shaped sample was removed from the sample chamber intact. This allows accurate measurement of the sample volume.

  • Page 25: Description Of The Test Performed And Factors Which Could Have Effect On Results Of Dot600 Measurements

    FIGURE A-3. Partial calibration set showing calibration data and equation. The effect of clay content on sensor response is apparent. A.7 Description of the Test Performed and Factors Which Could Have Effect on Results of DOT600 Measurements The scale/load cell Weights from 100 grams to 1000 grams were placed at various locations of a symmetrically defined grid superimposed on the scale surface.
  • Page 26 Soil water content Soil water content tests were conducted on multiple soil textures. This was done by measuring sample gravimetric water content using the DOT600. The cylindrically-shaped sample was removed from the sample chamber intact. It was then oven dried at 105C for 24 hours to determine sample dry weight, bulk density, gravimetric water content.
  • Page 28 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

Table of Contents