MO220

User Guide Moisture Meter Model MO220 Introduction Congratulations on your purchase of the Extech MO220 Moisture Meter. This instrument is a conductivity moisture meter specifically designed for the wood industry. The instrument has eight calibration scales, enabling the user to take accurate moisture measurements in 150 wood species. Moisture measurements can be taken using the integral pin electrodes, or using the heavy duty moisture probe. When used with the temperature probe, the moisture measurements are automatically corrected with respect to temperature. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. 2 Model MO220 V1.1 10/07 Specifications Display Measurement principle Range Electrode length Electrode pins Auto Power OFF Power supply Meter housing Operating Temperature Operating Humidity Dimensions Weight Dual measurement scale LCD with bargraph metering Electrical resistance Wood: 6 to 44%, Building materials: 0.2 to 2.0% 0.3” (8mm) Integrated, replaceable After approx. 15 minutes Two (2) ‘AAA’ 1’5V batteries Impact-proof plastic o o 32 to 104 F (0 to 40 C) 85% Relative Humidity maximum 5.1 x 1.6 x 1.0” (130 x 40 x 25mm) 3.5 oz. (100g) Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. Measurement pins Low battery icon LCD measurement reading Wood group designators Units of measure External moisture sensor input Remote temperature probe jack Temperature units button Wood group letter selector button 1 2 3 4 5 10. Power ON-OFF button 6 7 Note that the battery compartment is located on the rear of the instrument. 8 9 10 3 Model MO220 V1.1 10/07 Operation CAUTION: The electrode measurement pins are extremely sharp. Use care when handling this instrument. Cover the pins with the protective cap when the instrument is not in use. Basic Measurement Instructions 1. Remove the cap to expose the needle electrodes OR connect the heavy duty moisture probe socket on the right hand side of this instrument 2. Switch the meter ON by pressing the button. 3. Select the appropriate wood calibration scale A, B, C, E, F, G, H or J (see the Wood Calibration Tables later in this guide) using the button. 4. Push the needle pins or the heavy duty moisture probe pins into the wood and observe the reading. 5. Press and hold the power button to shut the meter off. Manual Temperature Correction (for use without the Temperature Probe) The instrument is calibrated for wood at 68°F (20°C). In general, wood that is warmer than 68°F (20°C) will give higher readings and wood colder than 68°F (20°C) will give lower readings. An approximate manual correction of 0.5% moisture content per 9°F (5°C) may be subtracted from wood that is above 68°F (20°C). For wood that is below 68°F (20°C), a manual correction of 0.5% moisture content per 9°F (5°C) may be added to the measured value. Automatic Temperature Correction ATC (for use with the Temperature Probe) 1. Switch the instrument on and select the appropriate wood calibration scale as detailed earlier. 2. Using a hammer and nail of a nominal 3 mm diameter, make a hole in the wood to be tested. 3. Remove the nail and push the Temperature Probe into the hole until the tip is at the required depth. 4. Connect the Temperature Probe into the instrument via the Temp socket. 5. Measure the wood as described earlier to obtain the automatically temperature corrected (ATC) moisture value. 6. To read the current temperature of the wood press the T button, the LCD will display the temperature. 7. Press the T button again to change the C/F unit of measure. 8. Press the button to display moisture value again. Auto Power OFF The meter can automatically turn itself off after several minutes. This is to conserve on battery energy. The user can select the period of time the meter must remain idle before turning itself off (1 through 9 minutes). The user can also elect to disable the automatic power off feature (select 00). 1. 2. 3. With the meter ON, simultaneously press the power and the right arrow buttons. The current time period will appear. While continuing to hold the power button, use the right arrow button to select the desired time period. Select ‘00’ to disable this feature. Release both buttons when the desired value is on the LCD. 4 Model MO220 V1.1 10/07 Manual Accuracy Check There are two (2) sets of calibration poles located inside the meter’s protective cover. One set is for the 18% calibration and the other is for the 26% calibration, as marked inside the cover. When checking the calibration, the A scale should be selected and the temperature probe must be disconnected. Touch the two measurement pins to the 18% calibration nodes and view the measurement on the meter display. Do the same for the 26% calibration. When correctly calibrated, the instrument will register %H2O values in the range of 17.7 to 18.3 (18% calibration) and in the range of 25.5 to 26.5 (26% calibration). If the tolerance exceeds ±1 the instrument must be recalibrated. Care and Maintenance When the instrument is not in use, keep it in its pouch together with its accessories. Store the kit in a stable, dust-free environment out of direct sunlight. Remove the batteries from the instrument if it is to be stored for periods of more than one month, or when the low battery power symbol appears on the display. Check the condition of accessories used with the instrument on a regular basis and replace them if they become worn or damaged. Battery replacement When the low battery icon appears on the display, replace the battery as soon as practical. 1. Remove the rear battery compartment screw. 2. Remove the battery compartment door 3. Replace the two (2) ‘AAA’ 1’5V batteries 4. Replace the compartment door and secure the screw before using the meter. 5 Model MO220 V1.1 10/07 Calibration Tables for Wood Wood Species Group Tables Common names of wood (BS-888 & 589:1973) Wood Species Abura Afara Aformosa Afzelia Agba Amboyna Ash, Ash, Ash, Ayan Baguacu, Balsa Banga Basswood Beech, Berlina Binvang Birch, Birch, Bisselon Bitterwood Blackbutt Bosquiea Boxwood, Camphorwood, Canarium, Cedar, Cedar, Cedar, Cherry, Chestnut Coachwood Cordia, Cypress, Cypress, Cypress, Dahoma Danta Douglas Elm, Elm, Elm, Elm, Empress, Erimado Fir, Fir, Fir, Gegu, Group E A G E J G B A A C F A A G C B E J A E F C A A C B B J C J C G F A J C A C B B E E E J F B A J H Model MO220 V1.1 10/07 American European Japanese Brazilian Wanga European European Yellow Maracaibo E African Japanese West Western European African Indian Red American E Japanese Japanese Light African (8-18%mc) (18-28%mc) Fir Japanese English Rock White Tree Douglas Grand Noble Nohor Grey Bark 6 Wood Species Greenheart Guarea, Guarea, Gum, Gum, Gum, Gum, Gurjun Hemlock, Hiba Hickory Hyedunani Iroko Ironbank Jarrah Jelutong Karpur Karri Kauri, Kauri, Keruing Kuroka Larch, Larch, Larch, Lime Loliondo Mahogany, Mahogany, Makore Mansoia Maple, Maple, Maple, Maple, Matai Meranti, Meranti, Merbau Missanda Muhuhi Muninga Musine Musizi Myrtle, Naingon Oak, Oak, Oak, Oak, Oak, Oak, Obeche Odoko Black White American Saligna Southern Spotted Western Red New Queensland Zealand European Japanese Western African West Indian Pacific Queensland Rock Sugar Red White (dark/light) Tasmanian American American European Japanese Tasmanian Turkey Red White Group C J H A B B A A C J F B F B C C A A E J F A C C F E C J B B B A B A A E B B B C J G J J A C A A A A C E G E Model MO220 V1.1 10/07 7 Wood Species Okwen Olive, Olivillo Opepe Padang Padauk, Panga Persimmon Pillarwood Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Pine, Poplar, Pterygota, Pyinkado Queensland Queensland Ramin Redwood, Redwood, Rosewood, Rubberwood Santa Sapele Sen Seraya, Silky Silky Spruce, Spruce, Spruce, Spruce, Stringybark, Stringybark, Sterculia, Sycamore Tallowwood E African African Panga American American Bunya Caribbean Corsican Hoop Huon Japanese Kauri Lodgepole Maritime New Nicaraguan Parana Ponderosa Radiata Red Scots Sugar Yellow Black African Kauri Walnut Baltic Californian Indian Maria long pitch Pitch leaf Black Zealand Pitch White (European) Red Oak, Oak, Japanese Japanese Norway Sitka Messmate Yellow Brown African Australian (8-18%mc) (18-28%mc) (European) Group B B G H A F A G F C C B C C C B B E A B B C B C C B A C A A A E J C G A B A H H C A C C C J C C C C C A F A Model MO220 V1.1 10/07 8 Wood Species Teak Totara Turpentine Utile Walnut, Walnut, Walnut, Walnut, Walnut, Wawa Wandoo Whitewood Yew African American European New Queensland Guinea Group F E C J J A C B C G J C C 9 Model MO220 V1.1 10/07 Botanical Names of Wood Wood Type Abies Abies Abies Acanthopanex Acer Acer Acer Aetoxicon Aformosia Afaelia Agathis Agathis Agathis Amblygonocarpus Amblygonocarpus Araucaria Araucaria Araucaria Berlinia Berlinia Betula Betula Betula Betula Bosquiera Brachylaena Brachylaena Calophyllum Canarium Cardwellia Carya Cassipourea Cassipourea Castanea Cedrea Ceratopetalum Chamaecyparis Chamaecyparis Chlorophora Cordial Corton Cryptomelia Cupressus Dacryium Dalbergia Diospyros Dipterocarpus Dipterocarpus Distemonanthus Dracontomelium Dryobanalops Dyera Grp alba grandis procera ricinifolius macrophyllum pseudoplatanus saccharum punctatum elata spp australis palmerstoni robusta andgensis obtusungulis angustifolia bidwilli cunninghamii grandiflora spp alba alleghaniensis pendula spp phoberos hutchinsii spp brasiliense schweinfurthii sublimes glabra elliotii melanosana sutiva odorata apetala spp spp excelsa alliodora megalocarpus japonica spp franklinii latifolia virginiana (Keruing) zeylanicus benthamianus mangiferum spp costulata 10 B A J A A F A G G E E J J A A B B B B J J J J A J B H B C F F F C J G G C F F J B A B A G F A C B A C Model MO220 V1.1 10/07 (8-18%mc) (18-28%mc) Wood Type Entandrophragma Entandrophragma Entandrophragma Endiandra Erythrophleum Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Eucalyptus Fagus Flindersia Fraxinus Fraxinus Fraxinus Fraxinus Gonystylus Gossweilodendron Gossypiospermum Grevillea Guarea Guarea Guibortia Hevea Intsia Juglans Juglans Khaya Khaya Larix Larix Larix Larix Liquidamper Lovoa Lovoa Maesopsis Mansonia Millettia Mimusops Mitragyna Nauclea Nesogordonia Nothofagus Ochroma Ochroma Ocotea Ocotea Grp angolense cylindricum utile palmerstoni spp acmenicides crebra diversicolor globules maculate marginata microcorys obliqua pilularis saligna wandoo sylvatica brayleyana Americana excelsior japonicus mardshurica macrophyllum balsamiferum proerox robusta cedrata thomsonii ehie barsilensis bijuga nigra regia senegalensis ivorensis deciduas kaempferi leptolepis occidentalis styraciflua klaineana trichiloides eminii altissima stuhimannii heckelii ciliate diderrichii papaverifera cunninghamii lagopus pyramidalis rodiaei usambarensis 11 H C J C C C B A B A C A C C B J C B B A A A G J A C H J B H B A C E J C C C F A J J J B A B E H C A A A C C Model MO220 V1.1 10/07 Wood Type Octomeles Olea Olea Palaquium Paulownia Pericopsis Picea Picea Picea Picea Picaenia Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pinus Pipadeniastrum Piptadenia Podocarpus Podocarpus Podocarpus Populus Pruns Pseudotsuga Pterocarpus Pterocarpus Pterocarpus Pterygota Quercus Quercus Quercus Quercus Quercus Ricinodendron Sarcocepalus Scottellia Sequoia Shorea Shorea Sterculia Swietenia Swietenia Syncarpia Syncarpia Tarrietia Taxus Tectona Grp sumatrana hochstetteri welwitschii spp tomentosa elata abies jezoensis jezoensis sitchensis excelsa caribaea contorta lampertiana nigra palustris pinaster ponderosa radiate spp strobus sylvestris thunbergii africanum africana dacrydiodes spicatus totara spp avium menzesii angolensis indicus soyauxii bequaertii cerris delegatensis gigantean robur spp heudelotti diderrichii coriacea sempervirens smithiana spp rhinopetala candollei mahogani glomulifera laurifolia utillis baccata grandis 12 (8-18%mc) (18-28%mc) E B C A J G C J C C C C A C C C B C C B A A B A A B C E A J B G G F A E C C A A F H E B G B A A B C C C C F Model MO220 V1.1 10/07 Wood Type Terminalia Thuja Tujopsis Tieghamella Tilia Tilia Triploehiton Tsuga Ulmus Ulmus Ulmus Xylia Zelkova Grp superba plicata dolabrat heckelii anericana vulgaris scleroxylon heterophylia amercana procea thomasii dolabriformis serrata A C J B G E G C E E E E B NOTES: The calibration data in this table are based on standard tests by oven-drying of commercial samples of the various wood species, between 7% and fibre saturation. Above the fibre saturation point (25%-30%) readings are approximate and generally apply to wood that has been dried and re-wetted. The instrument is calibrated for wood at 68°F (20°C). If the temperature of wood varies by more than 5°C, the meter reading can be corrected approximately by adding 1/2% for every 9F (5°C) below 68°F (20°C) or subtracting 1/2% for every 9F (5°C) above 68°F (20°C). Readings higher by 1%-2% may be obtained where wood has been impregnated with a water-borne preservative. High readings obtained with some ply-woods of peculiar composition must be treated with caution. 13 Model MO220 V1.1 10/07 Building material measurements: Select the ‘A’ scale to measure building materials. Refer to the following conversion table to obtain the building material moisture value. Std Bldg ChipMat’l Species Group Scale board B C E F G H J A %H2O 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 37 39 40 46.5 3 4.8 7.0 8.7 9.2 10.0 10.8 9.4 10.3 10.9 11.5 12.6 13.7 14.5 15.5 16.7 17.5 18.8 19.7 21.0 22.6 23.5 24.5 26.4 27.4 27.8 29.0 30.0 31.2 32.5 33.7 8.6 9.3 9.7 10.4 11.3 12.1 12.7 13.4 14.1 14.8 15.7 16.3 16.9 17.8 18.5 29.3 20.2 20.8 21.2 22.4 23.3 24.2 25.6 26.8 6.8 7.4 7.9 8.6 9.5 10.5 11.2 11.8 12.5 13.0 14.3 15.0 15.9 16.9 17.6 18.3 19.8 20.4 21.0 22.3 23.5 24.6 26.0 27.5 6.7 7.4 8.1 8.8 9.7 10.5 11.2 11.8 12.6 13.2 13.9 14.5 15.2 16.1 16.8 17.4 18.6 19.0 19.4 20.1 20.8 21.6 22.9 24.1 11.0 11.5 12.1 12.7 13.4 14.0 14.5 15.0 15.6 16.0 16.6 17.0 17.6 18.4 19.1 19.7 21.2 22.0 22.7 23.9 24.9 25.7 26.9 28.2 10.1 11.0 11.6 12.2 13.4 14.3 15.1 16.0 17.0 17.7 18.5 19.1 20.0 21.3 22.3 23.2 24.5 25.8 26.3 27.3 28.2 29.2 30.2 31.1 8.5 9.4 10.5 11.5 12.5 13.5 14.4 14.9 15.3 16.1 16.7 17.2 18.3 19.1 19.9 20.5 23 10.5 11.7 12.2 12.7 13.3 13.6 14.8 14.5 16.2 15.3 16.6 16.3 17.2 16.9 18.8 17.7 19.6 18.2 20.2 19.0 20.6 20.0 20.9 20.8 21.5 21.5 22.1 22.9 22.7 23.5 23.2 24.2 23.6 25.3 24.0 26.6 24.2 27.9 24.4 29.3 24.6 30.8 25.0 25.8 26.1 27.2 33.0 14 Model MO220 V1.1 10/07 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Support line (781) 890-7440 Technical support: Extension 200; E-mail: support@extech.com Repair & Returns: Extension 210; E-mail: repair@extech.com Product specifications subject to change without notice For the latest version of this User’s Guide, Software updates, and other up-to-theminute product information, visit our website: www.extech.com Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451 Copyright © 2007 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form. 15 Model MO220 V1.1 10/07