Extech Instruments MO50 User manual

USERGUIDE

CompactMoistureMeter



ModelMO50

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MO50‐en‐GB_V1.209/15

Introduction

ThankyouforselectingtheExtechMO50MoistureMeter.ThecompactMO50takesquick

Moisturelevelreferencemeasurements(inpercent%)onwoodandbuildingmaterials.The

MO50issimpletooperateandoffersmeasurementdigits,audibletonesand‘moisturedrop’

iconstoindicatemoisturelevelcontent.



TheMO50isidealforbuildingrestorationprojectsandapplicationswheremoisturedetectionon

floorsandundercarpetsiscritical.TheMO50isagreattoolforanalyzingtheafter‐effectsof

waterleakagebehindwallsandinceilings.



Thismeterisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof

reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionofthis

UserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.

Features

Displaysthemoisturelevelinwood

Displaysthemoisturelevelinbuildingmaterials(wallboard,sheetrock,cardboard,plaster,

concrete,andmortar)

Audibletoneratebeepsfasterasthemoisturelevelincreases(8tonevariations)

‘Moisturedrop’Iconsdisplaylow,mediumandhighlevelsofmoisturecontent

Easy‐to‐use,compactdesign

DisplayLockfreezesreadingondisplay

AutoPowerOffconservesbatterypower

Completewithpins(4),protectivecap,and9Vbattery



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MO50‐en‐GB_V1.209/15

Description

MeterDescription

1. Measurementpins

2. LCDDisplay

3. Powerbutton

4. MaterialSelectbutton

5. DisplayLock/Beeperbutton

Notes:

Batterycompartmentonrearofmeter

Protectivepincovernotshown



DisplayDescription

1. MoistureDropicons(1dropletforlowmoisturecontent,2formedium,and3forhigh)

2. Woodmode

3. BuildingMaterialmode

4. Beeperactiveicon

5. Moisturereadingdigits

6. Percentmoistureunit(relative)

7. DisplayLockmode

8. Batterystatusicon

Fig.1MeterDescription

Fig.2DisplayDescription

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MO50‐en‐GB_V1.209/15

ButtonDescription

ButtonButtonnameDescription

PowerON‐OFFPressandholdtoswitchthemeterONorOFF

/MaterialSelectSelectMaterialGroup(Wood,Building

Materials)

/DisplayLock/Beepercontrol

Shortpresslocksreadingonthedisplay

LongpresstogglestheBeeperON/OFF

Operation

OperatingSteps

1. Carefullyremovetheprotective/testcaptoexposetheelectrodepins.

2. SwitchthemeterONbypressingandholdingthe button.Themeteremitsaudibletones

andthedisplayswitchesonwhenthemeterpowersup.Ifthemeterdoesnotswitchon

pleasecheckthebatteryintherearcompartment.

3. MomentarypressesoftheMaterialSelectbutton togglestheWood andBuilding

Materialmodesofoperation.Thedisplayediconsindicatetheselectedmode.

4. Pushtheelectrodepinsintothematerialundertest.

5. Observethedisplayedreadinginpercent(%),viewthedisplayedmoisturedropleticon

andlistenfortheaudibletones.

1moisturedropletforlowreadings;2formediumreadings;3forhighreadings;refertothe

chartonthebackofthemeterandthereproductionintheAppendixlaterinthisguide.

Listen,also,totheaudiblemeasurementtone(fastbeepingforhigherreadingsandslow

beepingforlowerreadings).Thereareeight(8)tonevariations.

6. Pressandholdthepowerbuttontoswitchthemeteroff.

AutoPowerOFF(APO)

Toconservebatteryenergythemeterautomaticallyswitchesoffafterathree(3)minuteperiod

ofinactivity.

DisplayLock

PresstheDisplayLockbutton tofreezethedisplayedreading.The iconisvisibleonthe

displaywhenDisplayLockisactive.Press againtoreturntothenormaloperatingmode.

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.

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MO50‐en‐GB_V1.209/15

BeeperON/OFF

ThebeeperdefaultstoON.ToswitchthebeeperOFF,pressandholdtheDisplayLock/Audible

Beeperbutton.Whenthebeeperisactivetheaudiodisplayiconwillbevisible.



SelfTestcap

TurnontheMO50meterandsetthemetertoWoodorBuildingandpresstheelectrodepinsto

thecontactsonthetopoftheProtective/Testcap.

Expectedresults:

Wood: 17.0to19.0%

Building: 15.5to17.5%

Ifthemeterreadsoutsideofthesemeasurementsreplacethebatteries.Ifitstillreadsoutside

ofthesemeasurements,themeterisdefectiveandyoushouldcontactExtech.

Maintenance

BatteryReplacement

Whenthebatterystatusiconappearsemptyorflashing,replacethebattery.

1. Removetherearbatterycompartmentcoverbypushingthecompartmentlatch.

2. Replacethe9Vbatteryobservingcorrectpolarity.

3. Replacethecompartmentdoorsecurely.

4. Disposeofbatteryresponsiblyandwithinapplicablelegalregulations.



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.



CareandCleaning

Whentheinstrumentisnotinusepleasekeeptheprotectivecapinplace.Theelectrode

pinsareextremelysharp.

Storethemeterinanenvironmentallystable,dust‐freeenvironment,outofdirect

sunlight.

Removethebatteryfromtheinstrumentifthemeteristobestoredforlongperiodsorif

thebatterypowersymbolappearsempty(orflashing)onthedisplay.

Tocleanthemetercase,wipewithadampclothdonotusesolventsorabrasives.

Tocleanthepins,wipecarefullywithadampclothtoremoveresidue;allowtodrywell

beforeuse.

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MO50‐en‐GB_V1.209/15

Specifications

DisplayLCDwithmulti‐functionindicators

MeasurementtypeRelativeMoistureContent(%)

MeasurementprincipleElectricalresistance

MeasurementindicationDigital,MoistureDropleticons(1,2,or3droplets)andaudibletone

with8levelsofintensityindicatinglowtohighmoisturereadings

MeasurementrangesWood

Low:5%to11.9%;Medium:12%to15.9%;High:16to50%

BuildingMaterials

Low:1.5%to16.9%;Medium:17%to19.9%;High:20to33%

Resolution  0.1%

Accuracy  ±3.0%forambientconditions22oCto25oC(72oFto77oF)

Electrodepinlength0.3”(8mm)

ElectrodepintypeStainlesssteel.Integrated,replaceable

AutoPowerOFF Afterapprox.three(3)minutes

PowersupplyOne(1)9VBattery(rearcompartment)

Consumption<15mA

LowBatteryindicationWhenbatteryvoltageis<7.0VDC,approximately

Operatingconditions5~45oC(41~113oF);80%RHmax.

Storageconditions0~50oC(32~122oF);85%RHmax.

Dimensions 170x65x30mm(6.7x2.6x1.2")

Weight120g(4.2oz.)withoutbattery

Appendix

MeasurementInterpretationTable

WOOD(%)BUILDINGMATERIAL(%)

TOTALRANGE>5~501.5~33

LOW

5~9.91.5~9.9

10~11.910~16.9

MEDIUM

12~13.917~17.9

14~15.918~19.9



HIGH

16~19.920~23.9

20~29.924~27.9

30~39.928~29.9

40~5030~33



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform



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