3M Occupational Health and Environmental Safety Division3MTM

WIBGETTM

Heat Stress Monitor WB-300

WIBGET WB-300 User Manual

i Dangers, warnings and cautions

3MTM WIBGETTM Heat Stress Monitor WB-300 User Manual

Dangers, warnings and cautions

Danger!Failure to observe the following procedures may result in serious personal injury•Thisinstrumentisnotintrinsicallysafe,donotuseinhazardouslocations.

Warning!

Failure to observe the following procedures could damage the instrument• Readthemanualbeforeoperation.• Donotstoreintemperaturesexceeding100°C(212°F)• Donotimmerseinliquids.• Condensationmaydamageyourinstrument.• Substitutionofcomponentsmayimpairtheaccuracyoftheinstrument.Repairshouldbecompletedbyauthorizedservicepersonnelonly.

Caution! General • Replacementof9-Valkalinebatteryonlyinanon-hazardouslocations.• IfrechargingwithaNiHMBatterypack,rechargeonlyinanon-hazardousenvironment.• Anon-condensingenvironmentisrequiredforpropermeasurements.• Donotchargebatteryoutsidetherangeof0°Cto40°C(32°Fto104°F).• Batteryrun-timemaybereducedwhenoperatingatlowerthan0°C(32°F)temperatures.

Intended Use TheWIBGETWB-300isintendedtomeasureenvironmentaltemperaturesforheatstressanalysis.Consultyourcompany’ssafetyprofessionalforlocalstandards,orcall3Mat1-800-243-4630.

Table of ContentsUpandRunning.........................................................................................................................3Checkwickandfillnaturalwetbulb..........................................................................................3KeypadOperation......................................................................................................................4Sensors .....................................................................................................................................5NaturalWetBulbThermometer................................................................................................5GlobeThermometer.................................................................................................................5DryBulbThermometer.............................................................................................................5Measurements...........................................................................................................................6WetBulbGlobeTemperature...................................................................................................6DisplayedData..........................................................................................................................6Setup..........................................................................................................................................7PlacingtheWB-300on-siteformonitoring/testing...................................................................7OperationalCheck.....................................................................................................................8PowerOptions...........................................................................................................................89-VAlkalineBatteryReplacement..........................................................................................8NiMHBatteryPack........................................................................................................................8AppendixA:Specifications......................................................................................................9Measurements..........................................................................................................................9Languages.................................................................................................................................9Housing......................................................................................................................................9Size............................................................................................................................................9Weight......................................................................................................................................9SensorTypes.............................................................................................................................9Accuracy...................................................................................................................................9OperatingTemperatureRange..................................................................................................9PowerOptions..........................................................................................................................9BatteryLife................................................................................................................................9ChargeTime(NiMHBatteryPack)...........................................................................................9SafetyApprovalsandSpecialConditions.................................................................................9AppendixB:HeatExposuresTables.......................................................................................10ACGIH......................................................................................................................................10PHELCurves(TotalExposureTimeinHours:Minutes)......................................................... 11ProductInformation.................................................................................................................12Accessories.............................................................................................................................12Warranty..................................................................................................................................12Contact/Serviceinformation....................................................................................................12 ................................................................................................................................................12

FiguresFigure1:Wetbulbandmaintenance..........................................................................................4Figure2:Keypadkeysidentified..................................................................................................5Figure3:Sensorsidentified..........................................................................................................6Figure4:Data/measurementscreenexamples..........................................................................7Figure5:NiMHBatteryPack......................................................................................................9

iiTableofContents

Up and Running

1.Ensurethewetbulb’swickisclean.Then,fillthereservoirwithdistilledwater.

2.PlacetheWB-300intheworkareainasafelocationapproximately3.5feetofftheground.

3.TurntheinstrumentOnbypressingI/OEnterkey.• Ifthebatteryvoltagedisplayedduringthepower-onsequenceislessthanorequalto6.4volts,replaceorrechargethebatteries.

4.UsingtheArrowkeys,selectthedesiredmeasurement/parameterscreen.

5.Allow10minutesforthesensorstostabilizetotheenvironmentbeforetakingreadings.

Check wick and fill natural wet bulbTheWB-300usesacottonwickimmersedintoareservoircontainingdistilledwater.Ordinarytapwatershouldnotbeused,asthecontaminantsthatareleftbehindafterevaporationwillshortenthelifeofthewickandcausehighreadings.Ifthewickisdiscoloreditshouldbereplaced.Toreplacethewick,slidetheoldwickoffthetopofthesensor.Placeanewwickoverthesensor,makingsurethatthebottomofthewickisdowninthereservoir.

Figure 1: Wet bulb and maintenance

Filling wet bulb reservoir1.Removereservoircoverandfillwithdistilledorde-ionizedwater.

2.Replacereservoircover.

Wick

Reservoircover

Reservoir

Up & Running

1UpandRunning

Keypad Operation

Theunitoperatesusingamembranekeypadwith4keys.Thekeyrespondswhenthekeyisreleasedwhileallotherkeysrespondwhenthekeyispressed.

I/OEnterkey

Keys ExplanationI/O Enter

The keyisusedtoturnonandofftheinstrumentandtoentersetupchanges.

Turning on:PressandreleasetheI/Oenterkeytopoweron.TheInstrumentname(WIBGET),revisionnumber,andbatteryinformationappearsduringstart-up.

Turning off: HoldtheI/Okeydownwhileacount-down3-2-1occursinthelowerlefthandcornerofthedisplay.

Enter setup changes: WhileinSetupscreen,presstoenter(orselect)setupchanges.

SetupThekeyallowschangingthesetupparameters.Twoparametersareavailable:CelsiusorFahrenheitandlanguageselection.

Setup: Presssetuptoaccesstheparameters.Usethearrowkeystoswitchbetweenthetwoparameters.Presstheenterkeytochangetheparameters.Presssetupagaintoexit.

Up Arrow Thekeychangeswhichitemsappearonthedisplay.Scrollsup.

Down Arrow Thekeychangeswhichitemsappearonthedisplay.Scrollsdown.

Figure 2: Keypad keys identified

Down Arrow

UpArrow

Setupkey

Keypad

2KeypadOperation

Sensors

Natural Wet Bulb Thermometer Thenaturalwetbulbthermometergivesanindicationoftheeffectsofhumidityonanindividual.Relativehumidityandairflowaretakenintoaccountbymeasuringtheamountofevaporativecoolingtakingplaceatathermometercoveredwithamoistenedwick.TheWB-300usesacottonwickimmersedintoareservoircontainingdistilledwater.Ordinarytapwatershouldnotbeused,asthecontaminantsthatareleftbehindafterevaporationwillshortenthelifeofthewickandcausehighreadings.Ifthewickisdiscoloreditshouldbereplaced.Toreplacethewick,slidetheoldwickoffthetopofthesensor.Placeanewwickoverthesensor,makingsurethatthebottomofthewickisdowninthereservoir.

Globe Thermometer Theglobethermometergivesanindicationoftheradiantheatexposureonanindividualduetoeitherdirectlightorhotobjectsintheenvironment.Thisisaccomplishedbyplacingatemperaturesensorinsideablackenedcoppersphereandmeasuringthetemperaturerise.TheWBGTindexisbasedontheresponseofa6inchdiameterglobe.TheWB-300usesa2inchdiameterglobeforafasterresponsetime.Thetemperatureofthe2inchglobeiscorrelatedtomatchthatofa6inchglobe.Asanoption,asensorarraywitha6inchdiameterglobeisavailable.

Asanoption,asensorarraywitha6inchdiameterglobeisavailable.

Dry Bulb Thermometer Thedrybulbthermometermeasurestheambientairtemperature.ThismeasurementisusedintheoutdoorWBGTcalculationwhenahighsolarradiantheatloadmaybepresent.Theseriesofwhiteplatessurroundingthesensorshielditfromradiantheat.

A.GlobethermometerB.NaturalwetbulbthermometerC.Drybulbthermometer

A B C

Figure 3: Sensors identified

Sensors

3Sensors

MeasurementsTheWB-300portableheatstressmonitorcomputestheWetBulbGlobeTemperature(WBGT).TheWBGTisanacceptedmeasurementfordeterminingtheheatstresslevelimposedonanindividualinagivenenvironment.

TheWB-300measuresthreeparameters:• Ambientordrybulbtemperature(DB)• Naturalwetbulbtemperature(WB)• Globetemperature(G)

Wet Bulb Globe Temperature TheWBGTisaweightedaverageofthethreetemperaturesensorsusingthefollowingformulas:

WBGT(indoor)=0.7WB+0.3G(denotedas"WBGTi"onthedisplay)

WBGT(outdoor)=0.7WB+0.2G+0.1DB(denotedas"WBGTo"onthedisplay)

; NOTE: The resulting WBGTi/WBGTo can be compared to indices of work-rest regimens (or stay times) based upon the work loads. Please see Appendix B for published heat exposure tables.

Displayed DataWhenpoweredon,thepreviouslyviewedmeasurementscreenwillbedisplayed.Toviewdatascreens,presstheorkeys.

Data ScreensThefollowingfourscreensareviewablebypressingtheorkeysontheWB-300.

Wet/DryMeasurementscreen GlobeMeasurementscreen

WBGTi/WBGToMeasurementscreen Batteryscreen

Figure 4: Data/measurement screen examples

Measurements

4Measurements

SetupWhilepoweredon,pressthesetupkeytochangethetemperatureunits(oF/oC)orthelanguagesettings(English,Spanish,French,Italian,orGerman),ifdesired.

Placing the WB-300 on-site for monitoring/testingTheWB-300shouldbeplacedataheightof3.5feet(1.1m)forstandingindividualsor2feet(.6m)forseatedindividuals.Tripodmountingisrecommendedtogettheunitawayfromanythingthatmightblockradiantheatorairflow.A1/4"x20threadedbushingonthebottomoftheinstrumentallowsmountingtoastandardphotographictripod.Donotstandclosetotheunitduringsampling.

Makesurethatthewetbulbreservoirisfilledwithdistilledwaterandthatthecottonwickiscleanandfullywetted.Afteraddingwaterorplacingtheunitinanewenvironment,allowtenminutesfortheglobeandwetbulbreadingstostabilize.

Aseriesofdashesappearinthedisplayifoneofthefollowingoccur:•Thetemperatureisoutsideofitsallowablerange•Atemperaturesensorhasfailed

Operational CheckAverificationmodule,3MID:70071581246,maybeusedtochecktheoperationoftheWB-300.Removethetopsensorbarandplugtheverificationmoduleintothetopoftheunit.WiththeWB-300settoreadindegreesCelsius,verifythatthedisplayedreadingsmatchthoseprintedonthemodulewithin+/-0.5oC.

Ifthereadingsarenotwithinthe+/-0.5oCtolerance,thenhavetheunitservicedandcalibrated.

Setup

5Setup

Figure 5: NiMH Battery Pack

Power OptionsThereare3optionsforpoweringtheWB-300:a9-voltalkalinebattery,aNiMH(NickelMetalHydride)rechargeable6-cellbatterypack,andanACadapter.Adooronthebackoftheinstru-mentallowstheuseraccesstothe9-voltbattery.Therechargeablebatterypackislocatedinsideoftheunit.Iftherechargeablebatterypackeverneedstobereplaced,itcanbeaccessedbyremovingthescrewsfromthebottompaneloftheunit.

The2-positionswitchlocatedinthebatterycompartmentmustbesetbytheuserifthepowersupplymethodischanged.Theuppositionisforthe9-voltbattery.ThedownpositionallowsforeithertheACadapterortherechargeablebatteries.TheACadapterwilltricklechargetherechargeablebatteriesiftheyareinplaceoritwillsimplyallowforlinepoweroperationoftheunit.

9-V Alkaline Battery Replacement The9-voltbatteryshouldbereplacedortheNiMHbatterypackshouldberechargedwhenthevoltagedropsbelow6.4volts.Thebatteryvoltageisdisplayedwhentheinstrumentisturnedon.Whileturnedon,thebatteryvoltagecanbedisplayedatanytimebypressingtheupordownarrowkeystomovethroughthedisplayuntilthebatteryvoltagescreenappears.If,whileoperating,thebatteryvoltagedropsbelow6.4volts,thedisplaywillautomaticallyswitchtothedisplayshowingthebatteryvoltagealongwithalowbatterymessage.Afteralowbatteryoccurs,theunitwillcontinuetooperateforapproximately8hours.Whenthebatteryvoltagefallsto6.2voltsorbelow,theunitwillautomaticallyturnoff.

NiMH Battery Pack TheNiMHrechargeablebatterypackischargedintheinstrumentusing120VACto9VDCadapter.Adischargedbatterypackrequiresachargeof16hours.LeavingtheACadapterpluggedinforextendedlengthsoftimeorwhenoperatingtheinstrumentwillnotharmtherechargeablebatteries.

NiMH Battery PackToinstall,slideintocaseandpluginconnectorasshown.

Power Options

6PowerOptions

Appendix A: Specifications

Measurements • Globe,drybulb,wetbulb,WBGTi,(WBGTindoor)andWBGTo(WBGToutdoor).• TemperaturesgiveninCelsiusorFahrenheit.

LanguagesEnglish,French,Spanish,Italian,German.

HousingDesignedwaterresistanttoalightrainormist.Ifrainisfrequent,bestpracticewouldbetoremotethesensorbarandkeeptheinstrumentsheltered.(Note:whentopsensorbarisremoved,anoptionalcablecanbeattachedtomeasureremotely.)

SizeHeight9.2in(23.5cm);Width7.2in(18.3mm);Depth3.0in(7.5mm)Dimensionsincludemountedsensorassembly.

Weight 2.6lbs.(1.2kg)withmountedsensorassembly.

Sensor TypesTemperature:1000ohmplatinumRTD Accuracy Temperature:+/-0.5oCbetween0oCto100oC(+/-0.9o Fbetween32o Fto212oF)

Operating Temperature RangeSensorAssembly:-5oCto100oC(23oFto212oF)Electronics:-5oCto60oC(23o Fto140o F)

Power Options 9Valkaline,7.2VNiMHrechargeablepack(chargedintheunit),orACadapterwallpowercube(ACadapterwillpowertheunitorrechargetheNiMHbatterypack). Battery Life 9Valkaline:140hoursRechargeableNickelMetalHydride:300hours

Charge Time (NiMH Battery Pack) 16hours(chargeintheunit)

Safety Approvals and Special ConditionsCEmarkCompliancewithEssentialHealthandSafetyRequirementshasbeenassuredbycompliancewith:EN50014:1997andEN50020:2002Theyearofmanufactureisdeterminedbythethirdcharacterintheinstrument’sserialnumber.“A”wasmanufacturedin2001,“B”in2002,“C”in2003,“D”in2004andsoforth.

Specifications

7AppendixA:Specifications

Appendix B: Heat Exposures Tables

ACGIHScreeningCriteriaforHeatStressExposure.WBGTvaluesinoC.•NOTE:accordingtotheACGIH’sguidelines,thetemperaturevaluesrepresentaworkandrestprocesswhichisexplainedinthestandards.PleaserefertotheACGIHTLV’sandBEIsforspecificdetails.

Work and recovery (TLV )

Light Moderate Heavy Very Heavy

75%to100% 31.0 28.0 26.0* 23.5*

50%to75% 31.0 29.0 27.5 25.5*

25%to50% 32.0 30.0 29.0 28.0

0%to25% 32.5 31.5 30.5 30.0

Work and recovery(Action Limit)

Light Moderate Heavy Very Heavy

75%to100% 28.0 25.0 22.5* 20.0*

50%to75% 28.5 26.0 24.0 22.5*

25%to50% 29.5 27.0 25.5 24.5

0%to25% 30.0 29.0 28.0 27.0

*ValuesnotspecifiedbyACGIHhavebeenestimatedforcontinuity.Citedfrom"AmericanConferenceofGovernmentalIndustrialHygienists-ThresholdLimitValuesandBiologicalExposureIndicesfor2008";ReprintedwithpermissionfromACGIH

Appendix B

8AppendixB:HeatExposuresTables

PHEL Curves (Total Exposure Time in Hours: Minutes)WBGT (oF) I II III IV V VI

80.0 >8:00 >8:00 >8:00 8:00 6:35 4:30

81.0 >8:00 >8:00 >8:00 8:00 6:35 4:30

82.0 >8:00 >8:00 8:00 7:05 5:25 3:40

83.0 >8:00 8:00 7:45 6:25 4:55 3:20

84.0 >8:00 8:00 7:05 5:55 4:30 3:05

85.0 8:00 7:45 6:30 5:20 4:05 2:50

86.0 8:00 7:05 5:55 4:55 3:45 2:35

87.0 7:25 6:30 5:25 4:30 3:25 2:20

88.0 6:45 5:55 4:55 4:05 3:10 2:10

89.0 6:10 5:25 4:30 3:45 2:50 2:00

90.0 5:40 5:00 4:10 3:25 2:40 1:50

91.0 5:15 4:35 3:50 3:10 2:25 1:40

92.0 4:50 4:10 3:30 2:55 2:15 1:30

93.0 4:25 3:50 3:15 2:40 2:00 1:25

94.0 4:05 3:35 3:00 2:25 1:50 1:15

95.0 3:45 3:15 2:45 2:15 1:45 1:10

96.0 3:25 3:00 2:30 2:05 1:35 1:05

97.0 3:10 2:45 2:20 1:55 1:25 1:00

98.0 2:55 2:35 2:10 1:45 1:20 0:55

99.0 2:40 2:20 2:00 1:40 1:15 0:50

100.0 2:30 2:10 1:50 1:30 1:10 0:45

101.0 2:20 2:00 1:40 1:25 1:05 0:45

102.0 2:10 1:50 1:35 1:15 1:00 0:40

103.0 2:00 1:45 1:25 1:10 0:55 0:35

104.0 1:50 1:35 1:20 1:05 0:50 0:35

105.0 1:40 1:30 1:15 1:00 0:45 0:30

106.0 1:35 1:25 1:10 0:55 0:45 0:30

107.0 1:30 1:15 1:05 0:50 0:40 0:25

108.0 1:20 1:10 1:00 0:50 0:35 0:25

109.0 1:15 1:05 0:55 0:45 0:35 0:25

9PHELCurves

Product Information•WIBGETWB-300HeatStressMonitorkit,includes9Valkalinebattery,replacementwicks,waterbottle,verificationmodule,storagecase,andusermanual.(3MID:70-07160781-9)Accessories

Product No. Description 3M ID

056-795 3MTMSensorarraywith2inchglobe(oneincluded) 70-0715-8658-3

056-780 3MTMSensorarraywith6inchglobe(oneincluded) 70-0715-8656-7

015-910 3MTM120VACto9VDCtransformer/poweradapter 70-0715-8174-1

015-680 3MTM220VACto9VDCtransformer/poweradapter 70-0715-8507-2

059-045 3MTMTripod 70-0715-8374-7

056-679 3MTMReplacementwicks 70-0715-8373-9

053-923 3MTMVerificationmodule 70-0715-8124-6

056-068 3MTM2ozwaterbottle 70-0715-8371-3

Warranty3M™WIBGET™WB-300LIMITEDWARRANTY.3MwarrantstheWIBGETWB-300willbefreefromdefectivematerialsandworkmanshipfor one year from date of purchase (indicatedonthesalesreceipt),provideditismaintainedandusedinaccordancewith3M™instructionsand/orrecommendations.Ifanycomponentbecomesdefectiveduringthewarrantyperiod,itwillbereplacedorrepairedfreeofcharge.Thiswarrantydoesnotapplytounitsthathavebeenalteredorhadrepairattempted,orthathavebeensubjectedtoabuse,accidentalorotherwise.Theabovewarrantyisinlieuofallotherexpresswarranties,obligationsorliabilities.THEIMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESSFORPARTICULARPURPOSEARELIMITEDTOoneyearFROMTHEPURCHASEDATE. 3M™shallnotbeliableforanyotherwarranty,expressorimplied,arisingoutoforrelatedtotheappropriateuseofenvironmentaltemperaturemeasurementdataforheatstressrelatedissues.Manufactureroritsagent’sliabilityshallbelimitedtoreplacementorrepairassetforthabove.Buyer’ssoleandexclusiveremediesarereturnofthegoodsandrepaymentoftheprice,orrepairandreplacementofdefectivegoodsorparts.

Contact/Service information InUnitedStates,contact:Website:3M.com/DetectionTechnicalAssistance:1-800-243-4630Forother3Mproducts:1-800-3MHELPSOr1-651-737-6501©20113MCompany

3M Occupational Health andEnvironmental Safety Division 3MCenterBuilding0253-02-W-70 St.Paul,MN55144-1000

10ProductInformation

Occupational Health & Environmental Safety Division3MCenterBuilding0235-02-W-70St.Paul,MN55144-10003M.com/detectionTechnicalService:18002434630CustomerService:180032816673M.com/OccSafety

Pleaserecycle.PrintedinU.S.A.3MandWIBGETaretrademarksof3MUsedunderlicenseinCanada©20113MCompanyAllrightsreserved.34-8706-7556-7