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