Extech Instruments MO220 Manuale utente

USER MANUAL

Moisture Meter

Model MO220

Additional User Manual Translations available at www.extech.com

MO220–en-GB_V1.6 7/17

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 170 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.

Description

Meter Description

1. Measurement pins

2. Low battery icon

3. LCD measurement reading

4. Wood group designators

5. Units of measure

6. External moisture sensor input

7. Remote temperature probe jack

8. Temperature units button

9. Wood group letter selector button

10. Power ON-OFF button

Note that the battery compartment is located on the

rear of the instrument.

MO220–en-GB_V1.6 7/17

Operation

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 Tbutton, the LCD will display the

temperature.

7. Press the Tbutton 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. With the meter ON, simultaneously press the power and the right arrow buttons. The

current time period will appear.

2. While continuing to hold the power button, use the right arrow button to select the

desired time period. Select ‘00’ to disable this feature.

3. Release both buttons when the desired value is on the LCD.

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.

MO220–en-GB_V1.6 7/17

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 instrument reads outside the above parameters, replace the batteries. If the instrument is

still outside the parameters return for service.

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.

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, users are legally required to take used batteries to appropriate collection sites, the

retail store where the batteries were purchased, or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-

of-life devices to a designated collection point for the disposal of electrical and electronic

equipment.

Specifications

Display Dual measurement scale LCD with bar graph metering

Measurement principle Electrical resistance

Range Wood: 6 to 44%

Electrode length 8mm (0.3”)

Electrode pins Integrated, replaceable

Auto Power OFF After approx. 15 minutes

Power supply Two (2) ‘AAA’ 1’5V batteries

Meter housing Impact-proof plastic

Operating Temperature 0 to 40oC (32 to 104oF)

Operating Humidity 85% Relative Humidity maximum

Dimensions 130 x 40 x 25mm (5.1 x 1.6 x 1.0”)

Weight 100g (3.5 oz)

MO220–en-GB_V1.6 7/17

Calibration Tables for Wood

Wood Species Group Tables

Common names of wood (BS-888 & 589:1973)

Wood Species

Group

Abura

Afara

Aformosa

Afzelia

Agba

Amboyna

Ash,

American

Ash,

European

Ash,

Japanese

Ayan

Baguacu,

Brazilian

Balsa

Banga

Wanga

Basswood

Beech,

European

Berlina

Binvang

Birch,

European

Birch,

Yellow

Bisselon

Bitterwood

Blackbutt

Bosquiea

Boxwood,

Maracaibo

Camphorwood,

African

Canarium,

African

Cedar,

Japanese

Cedar,

West

Indian

Cedar,

Western

Red

Cherry,

European

Chestnut

Coachwood

Cordia,

American

Light

Cypress,

African

Cypress,

Japanese

(8-18%mc)

Cypress,

Japanese

(18-28%mc)

Dahoma

Danta

Douglas

Fir

Elm,

Japanese

Grey

Bark

Elm,

English

Elm,

Rock

Elm,

White

Empress,

Tree

Erimado

Fir,

Douglas

Fir,

Grand

Fir,

Noble

MO220–en-GB_V1.6 7/17

Wood Species

Group

Gegu,

Nohor

Greenheart

Guarea,

Black

Guarea,

White

Gum,

American

Red

Gum,

Saligna

Gum,

Southern

Gum,

Spotted

Gurjun

Hemlock,

Western

Hiba

Hickory

Hyedunani

Iroko

Ironbank

Jarrah

Jelutong

Karpur

Karri

Kauri,

New

Zealand

Kauri,

Queensland

Keruing

Kuroka

Larch,

European

Larch,

Japanese

Larch,

Western

Lime

Loliondo

Mahogany,

African

Mahogany,

West

Indian

Makore

Mansoia

Maple,

Pacific

Maple,

Queensland

Maple,

Rock

Maple,

Sugar

Matai

Meranti,

Red

(dark/light)

Meranti,

White

Merbau

Missanda

Muhuhi

Muninga

Musine

Musizi

Myrtle,

Tasmanian

Naingon

Oak,

American

Red

Oak,

American

White

Oak,

European

Oak,

Japanese

Oak,

Tasmanian

Oak,

Turkey

MO220–en-GB_V1.6 7/17

Wood Species

Group

Obeche

Odoko

Okwen

Olive,

African

Olivillo

Opepe

Padang

Padauk,

African

Panga

Persimmon

Pillarwood

Pine,

American

long

leaf

Pine,

American

pitch

Pine,

Bunya

Pine,

Caribbean

Pitch

Pine,

Corsican

Pine,

Hoop

Pine,

Huon

Pine,

Japanese

Black

Pine,

Kauri

Pine,

Lodgepole

Pine,

Maritime

Pine,

New

Zealand

White

Pine,

Nicaraguan

Pitch

Pine,

Parana

Pine,

Ponderosa

Pine,

Radiata

Pine,

Red

Pine,

Scots

Pine,

Sugar

Pine,

Yellow

Poplar,

Black

Pterygota,

African

Pyinkado

Queensland

Kauri

Queensland

Walnut

Ramin

Redwood,

Baltic

(European)

Redwood,

Californian

Rosewood,

Indian

Rubberwood

Santa

Maria

Sapele

Sen

Seraya,

Red

Silky

Oak,

African

Silky

Oak,

Australian

Spruce,

Japanese

(8-18%mc)

Spruce,

Japanese

(18-28%mc)

Spruce,

Norway

(European)

Spruce,

Sitka

Stringybark,

Messmate

Stringybark,

Yellow

MO220–en-GB_V1.6 7/17

Wood Species

Group

Sterculia,

Brown

Sycamore

Tallowwood

Teak

Totara

Turpentine

Utile

Walnut,

African

Walnut,

American

Walnut,

European

Walnut,

New

Guinea

Walnut,

Queensland

Wawa

Wandoo

Whitewood

Yew

MO220–en-GB_V1.6 7/17

Botanical Names of Wood

Wood Type

Grp

Abies

alba

Abies

grandis

Abies

procera

Acanthopanex

ricinifolius

Acer

macrophyllum

Acer

pseudoplatanus

Acer

saccharum

Aetoxicon

punctatum

Aformosia

elata

Afaelia

spp

Agathis

australis

Agathis

palmerstoni

Agathis

robusta

Amblygonocarpus

andgensis

Amblygonocarpus

obtusungulis

Araucaria

angustifolia

Araucaria

bidwilli

Araucaria

cunninghamii

Berlinia

grandiflora

Berlinia

spp

Betula

alba

Betula

alleghaniensis

Betula

pendula

Betula

spp

Bosquiera

phoberos

Brachylaena

hutchinsii

Brachylaena

spp

Calophyllum

brasiliense

Canarium

schweinfurthii

Cardwellia

sublimes

Carya

glabra

Cassipourea

elliotii

Cassipourea

melanosana

Castanea

sutiva

Cedrea

odorata

Ceratopetalum

apetala

Chamaecyparis

spp

(8-18%mc)

Chamaecyparis

spp

(18-28%mc)

Chlorophora

excelsa

Cordial

alliodora

Corton

megalocarpus

Cryptomelia

japonica

Cupressus

spp

Dacryium

franklinii

Dalbergia

latifolia

Diospyros

virginiana

Dipterocarpus

(Keruing)

Dipterocarpus

zeylanicus

Distemonanthus

benthamianus

Dracontomelium

mangiferum

Dryobanalops

spp

Dyera

costulata

MO220–en-GB_V1.6 7/17

Wood Type

Grp

Entandrophragma

angolense

Entandrophragma

cylindricum

Entandrophragma

utile

Endiandra

palmerstoni

Erythrophleum

spp

Eucalyptus

acmenicides

Eucalyptus

crebra

Eucalyptus

diversicolor

Eucalyptus

globules

Eucalyptus

maculate

Eucalyptus

marginata

Eucalyptus

microcorys

Eucalyptus

obliqua

Eucalyptus

pilularis

Eucalyptus

saligna

Eucalyptus

wandoo

Fagus

sylvatica

Flindersia

brayleyana

Fraxinus

Americana

Fraxinus

excelsior

Fraxinus

japonicus

Fraxinus

mardshurica

Gonystylus

macrophyllum

Gossweilodendron

balsamiferum

Gossypiospermum

proerox

Grevillea

robusta

Guarea

cedrata

Guarea

thomsonii

Guibortia

ehie

Hevea

barsilensis

Intsia

bijuga

Juglans

nigra

Juglans

regia

Khaya

senegalensis

Khaya

ivorensis

Larix

deciduas

Larix

kaempferi

Larix

leptolepis

Larix

occidentalis

Liquidamper

styraciflua

Lovoa

klaineana

Lovoa

trichiloides

Maesopsis

eminii

Mansonia

altissima

Millettia

stuhimannii

Mimusops

heckelii

Mitragyna

ciliate

Nauclea

diderrichii

Nesogordonia

papaverifera

Nothofagus

cunninghamii

Ochroma

lagopus

Ochroma

pyramidalis

Ocotea

rodiaei

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