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Nigos DVD-240 Quick Reference Manual

Nondestructive moisture meter
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  • Page 2: Table Of Contents

    TABLE OF CONTENTS QUICK REFERENCE GUIDE ........................2 TECHNICAL SPECIFICATION ......................... 5 DESCRIPTION OF MOISTURE METER ...................... 6 TURNING METER ON / OFF AND AUTOCALIBRATION PROCEDURE ............8 DEVICE SET-UP AND ADJUSTMENT FOR MEASUREMENT ................ 10 WOOD DENSITY (TYPE) parameter setting ................

  • Page 3: Quick Reference Guide

    1. QUICK REFERENCE GUIDE 1. Turning the meter ON 2. Wood density adjustment - Press the button briefly (back side untouched) ; use - Press and hold button - Wait for autocalibration process to end and to adjust timber density (given in t/ to be displayed UP/DOWN UP/DOWN...
  • Page 4 3. Wood thickness adjustment 4. Measurement - moisture content reading - Gently press the back side of the meter on the flat - Press and hold button ; use and smooth surface of wood sample "along fibers" - Read the measured value on display (in %MC) to adjust wood thickness (given in mm) - Repeat the measurement in several points UP/DOWN...
  • Page 5 5. Measurement - option HOLD 6. Turning the meter OFF HOLD - Press the button briefly - If needed, press briefly button to hold the measured value displayed for later reading - Press same button again to continue measuring &1 UP/DOWN UP/DOWN HOLD...

  • Page 6: Technical Specification

    Sensor dimensions (W x H) (42 x 78) (mm) HOLD Weight 210 g MEASUREMENT WOOD MOISTURE METER Measurement resolution 0.1 % DVD-240 ¸ Wood MC measurement range 100) (%) ¸ Wood thickness range (0.5 40) (mm) ¸ Wood density range 0.30...

  • Page 7: Description Of Moisture Meter

    3. DESCRIPTION OF MOISTURE METER UP/DOWN HOLD WOOD MOISTURE METER DVD-240...
  • Page 8 DVD-240 FRONT SIDE LAYOUT Wood moisture content meter DVD-240 is made for quick reading of wood moisture by simple pressing LCD DISPLAY displays: on flat wooden surface. - Measured moisture content Device is placed in the plastic case with large display...

  • Page 9: Turning Meter On / Off And Autocalibration Procedure

    . Meter will perform certain additional functions immediately after powering on. When the button is pressed, message is displayed for few seconds. During this time, meter DVD-240 is performing AUTOCALIBRATION procedure, i.e. series of test-measurements required for its adaptation to current operating conditions (ambient temperature, air humidity, etc).
  • Page 10 If there is any doubt in measuring accuracy and possible error in autocalibration as a cause of false measurement, autocalibration should be repeated by simple turning off and turning on the meter again. Meter can detect large calibration errors itself. In this situation, after removing all objects away from back side of the meter (so it "measures air"), message is displayed.

  • Page 11: Device Set-Up And Adjustment For Measurement

    (specie) when it is absolutely dry (with 0% MC). Data regarding wood density of specific wood specie can be found in appendix of this manual, but other reliable sources can also be used. Nondestructive portable moisture meter DVD-240 supports selection of WOOD DENSITY in range 0.30 1.10...
  • Page 12 Wood density adjustment is performed in following way: Press and hold button WOOD DENSITY ). Device will display density value (in ) which was last entered - Holding the button pressed, press the buttons DOWN ) or ) to adjust desired value for density.

  • Page 13: Wood Thickness Parameter Setting

    5.2 WOOD THICKNESS parameter setting Second essential parameter for correct moisture content measurement is thickness of the wooden sample. Measured MC value greatly depends on this parameter (especially when thinner samples are used - thinner than 15 mm), so it is required to determine the thickness as precise as possible. Value is entered in and in range 40 mm Thickness parameter setting is performed similar to wood density (type) parameter setting:...
  • Page 14 After these procedures, all needed parameters are loaded in meter's memory. Once entered, these parameters remain stored in the memory and they are active until next adjustment. In case there is no need to change these parameters frequently, it is enough just to check these values before each measurement and proceed with measurement immediately.

  • Page 15: Wood Moisture Content Measurement

    WOOD MOISTURE CONTENT MEASUREMENT Wood moisture content measurement is main purpose f this device. Moisture content value is given in percentage (%) and displayed on LC display. Measurement process is very simple and comes to (aside previously described adjustment) proper placing of the meter on the surface of wooden sample and reading of displayed value.
  • Page 16 Complete measurement procedure is performed in following way: - Before the start of measurement turn the meter ON. Pay attention to autocalibration process which is performed automatically immediately after powering the meter (chapter 4); - Check parameter settings for WOOD DENSITY WOOD THICKNESS and correct the values if needed;...

  • Page 17: Timber Mc Measurement Procedure

    6.1 Timber MC measurement procedure For accurate MC measurement in timber boards following must be payed attention to: Moisture distribution along depth of the board should be uniform (board surface must not be dried due to exposure to direct sun light or during extensive drying. If necessary, cut the sample in half. Place the board (sample) on wooden bars to avoid the influence of the ground on the measurement.

  • Page 18: Veneer Mc Measurement Procedure

    6.2 Veneer MC measurement procedure Veneer MC measurement is very specific, so it is required to perform following preparation for accurate reading. - Precisely determine sample thickness, because thickness parameter has great influence for thin samples. - Place veneer sample on expanded polystyrene layer at least 50 mm thick (polystyrene does not influence measuring!).

  • Page 19: Hold Function

    6.3 HOLD function Function HOLD is very useful in cases where timber sample is partially unaccessible, so it is impossible to see the display directly, but it is possible to reach the sample with the meter. HOLD During measurement, after the meter is positioned properly and measurement conditions are stable, press button.

  • Page 20: Maintenance And Battery Replacement

    7. MAINTENANCE AND BATTERY REPLACEMENT Portable meter DVD-240 has plastic housing which under normal exploitation conditions provide necessary mechanical firmness and protection. Rough manipulation, hitting and exposing the meter to extreme conditions (high temperature, high humidity, offensive chemicals, high mechanical tensions, etc) should be avoided.

  • Page 21: Appendix

    8. APPENDIX Appendix 1 Additional information regarding wood density and wood moisture content Wood density is given for wood specie (type) in absolutely dry condition (0% moisture content) and is expressed . It is calculated as weight of absolutely dry wooden sample divided by its volume. This density is often given as constant value for specific wood type from specific climate and it represents important data for wood moisture content measurement.

  • Page 22: Appendix 2: Wood Density Table

    8.2 Appendix 2: Wood density table DENSITY (t/m ) DENSITY (t/m ) WOOD SPECIE WOOD SPECIE average average Abachi (Samba) 0.25 0.35 0.52 Birch 0.46 Abura Camphorwood 0.55 Acacia 0.65 0.75 Cedar 0.35 0.45 0.55 Afara, White Cherry 0.52 0.62 0.45 0.55 Afrormosia...
  • Page 23 DENSITY (t/m ) DENSITY (t/m ) WOOD SPECIE WOOD SPECIE average average Ivory Wood, Pink Mahogany, African 0.41 Jelutong 0.45 Mahogany, Sapelli 0.65 Juniper 0.64 Mahogany, White 0.45 Kapur Mahogany, Philippines 0.75 0.55 Kekatong Mango Wood 0.82 0.55 Kempass Maple 0.48 0.75 0.72...
  • Page 24 DENSITY (t/m ) DENSITY (t/m ) WOOD SPECIE WOOD SPECIE average average Okume 0.31 0.57 Rosewood 0.80 Olive Tree 0.75 Rubberwood 0.55 Padauk Seminai 0.95 Palisander Sequoia 0.35 Pear 0.55 0.76 Seraya 0.65 0.50 Perupok Spruce 0.50 0.40 Pine 0.38 0.48 Teak 0.45...

  • Page 25: Air Temperature And Relative Humidity Measurement (Optional)

    9 AIR TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENT (OPTIONAL) DSVT-03 PROBE GENERAL CHARACTERISTICS Power supply From VD- Tube dimensions (D(mm) / 140 / Cable length / connector 2m / USB type ¸ ¸ Operating conditions T: -20 80 C; RH: 0 100% ¸...

  • Page 26: Air Temperature And Relative Humidity Measurement Procedure

    In that case, additional connector for connection of this probe (USB type) is installed on moisture meter DVD-240 9.1 Air temperature and relative humidity measurement procedure Air temperature and relative humidity measurement using portable moisture meter...

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