3M WIBGET WB-300 User manual

3M Occupational Health and Environmental Safety Division
3MTM WIBGETTM Heat Stress Monitor WB-300
WIBGET WB-300 User Manual
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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
•Thisinstrumentisnotintrinsicallysafe,donotuseinhazardouslocations.
Warning!
Failure to observe the following procedures could damage the instrument
• Readthemanualbeforeoperation.
• Donotstoreintemperaturesexceeding100°C(212°F)
• Donotimmerseinliquids.
• Condensationmaydamageyourinstrument.
• Substitutionofcomponentsmayimpairtheaccuracyoftheinstrument.Repairshould
becompletedbyauthorizedservicepersonnelonly.
Caution!
General
• Replacementof9-Valkalinebatteryonlyinanon-hazardouslocations.
• IfrechargingwithaNiHMBatterypack,rechargeonlyinanon-hazardousenvironment.
• Anon-condensingenvironmentisrequiredforpropermeasurements.
• Donotchargebatteryoutsidetherangeof0°Cto40°C(32°Fto104°F).
• Batteryrun-timemaybereducedwhenoperatingatlowerthan0°C(32°F)
temperatures.
Intended Use
TheWIBGETWB-300isintendedtomeasureenvironmentaltemperaturesforheat
stressanalysis.Consultyourcompany’ssafetyprofessionalforlocalstandards,orcall3M
at1-800-243-4630.
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Table of Contents
UpandRunning.........................................................................................................................3
Checkwickandllnaturalwetbulb..........................................................................................3
KeypadOperation......................................................................................................................4
Sensors .....................................................................................................................................5
NaturalWetBulbThermometer................................................................................................5
GlobeThermometer.................................................................................................................5
DryBulbThermometer.............................................................................................................5
Measurements...........................................................................................................................6
WetBulbGlobeTemperature...................................................................................................6
DisplayedData..........................................................................................................................6
Setup..........................................................................................................................................7
PlacingtheWB-300on-siteformonitoring/testing...................................................................7
OperationalCheck.....................................................................................................................8
PowerOptions...........................................................................................................................8
8
..........................................8
9
9
9
9
9
9
9
9
9
9
9
9
9
10
10
.......................................11
12
12
12
9-VAlkalineBatteryReplacement..........................................................................................
NiMHBatteryPack..............................................................................
AppendixA:Specications......................................................................................................
Measurements..........................................................................................................................
Languages.................................................................................................................................
Housing......................................................................................................................................
Size............................................................................................................................................
Weight......................................................................................................................................
SensorTypes.............................................................................................................................
Accuracy...................................................................................................................................
OperatingTemperatureRange..................................................................................................
PowerOptions..........................................................................................................................
BatteryLife................................................................................................................................
ChargeTime(NiMHBatteryPack)...........................................................................................
SafetyApprovalsandSpecialConditions.................................................................................
AppendixB:HeatExposuresTables.......................................................................................
ACGIH......................................................................................................................................
PHELCurves(TotalExposureTimeinHours:Minutes)..................
ProductInformation.................................................................................................................
Accessories.............................................................................................................................
Warranty..................................................................................................................................
Figures
Figure1:Wetbulbandmaintenance..........................................................................................4
Figure2:Keypadkeysidentied..................................................................................................5
Figure3:Sensorsidentied..........................................................................................................6
Figure4:Data/measurementscreenexamples..........................................................................7
Figure5:NiMHBatteryPack......................................................................................................9
iiTableofContents
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Up and Running
1. Ensurethewetbulb’swickisclean.Then,llthereservoirwithdistilledwater.
2. PlacetheWB-300intheworkareainasafelocationapproximately3.5feetoff
theground.
3. TurntheinstrumentOnbypressingI/OEnterkey.
• Ifthebatteryvoltagedisplayedduringthepower-onsequenceislessthanorequalto
6.4volts,replaceorrechargethebatteries.
4. UsingtheArrowkeys,selectthedesiredmeasurement/parameterscreen.
5. Allow10minutesforthesensorstostabilizetotheenvironmentbeforetaking
readings.
Check wick and fill natural wet bulb
TheWB-300usesacottonwickimmersedintoareservoircontainingdistilledwater.Ordinary
tapwatershouldnotbeused,asthecontaminantsthatareleftbehindafterevaporationwill
shortenthelifeofthewickandcausehighreadings.Ifthewickisdiscoloreditshouldbe
replaced.Toreplacethewick,slidetheoldwickoffthetopofthesensor.Placeanewwickover
thesensor,makingsurethatthebottomofthewickisdowninthereservoir.
Figure 1: Wet bulb and maintenance
Filling wet bulb reservoir
1.Removereservoircoverandllwithdistilledorde-ionizedwater.
2.Replacereservoircover.
Wick
Reservoircover
Reservoir
Up & Running
1UpandRunning
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Keypad Operation
Theunitoperatesusingamembranekeypadwith4keys.Thekeyresponds
whenthekeyisreleasedwhileallotherkeysrespondwhenthekeyispressed.
I/OEnterkey
Keys Explanation
I/O Enter The keyisusedtoturnonandofftheinstrumentandtoentersetup
changes.
Turning on:PressandreleasetheI/Oenterkeytopoweron.The
Instrumentname(WIBGET),revisionnumber,andbatteryinformation
appearsduringstart-up.
Turning off: HoldtheI/Okeydownwhileacount-down3-2-1occursinthe
lowerlefthandcornerofthedisplay.
Enter setup changes: WhileinSetupscreen,presstoenter(orselect)
setupchanges.
Setup Thekeyallowschangingthesetupparameters.Twoparametersare
available:CelsiusorFahrenheitandlanguageselection.
Setup: Presssetuptoaccesstheparameters.Usethearrowkeysto
switchbetweenthetwoparameters.Presstheenterkeytochangethe
parameters.Presssetupagaintoexit.
Up Arrow Thekeychangeswhichitemsappearonthedisplay.Scrollsup.
Down Arrow Thekeychangeswhichitemsappearonthedisplay.Scrollsdown.
Figure 2: Keypad keys identied
Down Arrow
UpArrow
Setupkey
Keypad
2KeypadOperation
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Sensors
Natural Wet Bulb Thermometer
Thenaturalwetbulbthermometergivesanindicationoftheeffectsofhumidityonanindividual.
Relativehumidityandairowaretakenintoaccountbymeasuringtheamountofevaporative
coolingtakingplaceatathermometercoveredwithamoistenedwick.TheWB-300usesa
cottonwickimmersedintoareservoircontainingdistilledwater.Ordinarytapwatershouldnot
beused,asthecontaminantsthatareleftbehindafterevaporationwillshortenthelifeofthewick
andcausehighreadings.Ifthewickisdiscoloreditshouldbereplaced.Toreplacethewick,
slidetheoldwickoffthetopofthesensor.Placeanewwickoverthesensor,makingsurethat
thebottomofthewickisdowninthereservoir.
Globe Thermometer
Theglobethermometergivesanindicationoftheradiantheatexposureonanindividualdue
toeitherdirectlightorhotobjectsintheenvironment.Thisisaccomplishedbyplacinga
temperaturesensorinsideablackenedcoppersphereandmeasuringthetemperaturerise.The
WBGTindexisbasedontheresponseofa6inchdiameterglobe.TheWB-300usesa2inch
diameterglobeforafasterresponsetime.Thetemperatureofthe2inchglobeiscorrelated
tomatchthatofa6inchglobe.Asanoption,asensorarraywitha6inchdiameterglobeis
available.
Asanoption,asensorarraywitha6inchdiameterglobeisavailable.
Dry Bulb Thermometer
Thedrybulbthermometermeasurestheambientairtemperature.Thismeasurementisusedin
theoutdoorWBGTcalculationwhenahighsolarradiantheatloadmaybepresent.Theseriesof
whiteplatessurroundingthesensorshielditfromradiantheat.
A.Globethermometer
B.Naturalwetbulbthermometer
C.Drybulbthermometer
AB C
Figure 3: Sensors identied
Sensors
3Sensors
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Measurements
TheWB-300portableheatstressmonitorcomputestheWetBulbGlobeTemperature(WBGT).
TheWBGTisanacceptedmeasurementfordeterminingtheheatstresslevelimposedonan
individualinagivenenvironment.
TheWB-300measuresthreeparameters:
• Ambientordrybulbtemperature(DB)
• Naturalwetbulbtemperature(WB)
• Globetemperature(G)
Wet Bulb Globe Temperature
TheWBGTisaweightedaverageofthethreetemperaturesensorsusingthefollowing
formulas:
WBGT(indoor)=0.7WB+0.3G(denotedas"WBGTi"onthedisplay)
WBGT(outdoor)=0.7WB+0.2G+0.1DB(denotedas"WBGTo"onthedisplay)
;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 Data
Whenpoweredon,thepreviouslyviewedmeasurementscreenwillbedisplayed.Toviewdata
screens,presstheorkeys.
Data Screens
ThefollowingfourscreensareviewablebypressingtheorkeysontheWB-300.
Wet/DryMeasurementscreen GlobeMeasurementscreen
WBGTi/WBGToMeasurementscreen Batteryscreen
Figure 4: Data/measurement screen examples
Measurements
4Measurements
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Setup
Whilepoweredon,pressthesetupkeytochangethetemperatureunits(oF/oC)orthe
languagesettings(English,Spanish,French,Italian,orGerman),ifdesired.
Placing the WB-300 on-site for monitoring/testing
TheWB-300shouldbeplacedataheightof3.5feet(1.1m)forstandingindividualsor2
feet(.6m)forseatedindividuals.Tripodmountingisrecommendedtogettheunitaway
fromanythingthatmightblockradiantheatorairow.A1/4"x20threadedbushingonthe
bottomoftheinstrumentallowsmountingtoastandardphotographictripod.Donotstand
closetotheunitduringsampling.
Makesurethatthewetbulbreservoirislledwithdistilledwaterandthatthecottonwick
iscleanandfullywetted.Afteraddingwaterorplacingtheunitinanewenvironment,
allowtenminutesfortheglobeandwetbulbreadingstostabilize.
Aseriesofdashesappearinthedisplayifoneofthefollowingoccur:
•Thetemperatureisoutsideofitsallowablerange
•Atemperaturesensorhasfailed
Operational Check
Avericationmodule,3MID:70071581246,maybeusedtochecktheoperationofthe
WB-300. Remove the top sensor bar and plug the verication module into the top of the
unit. With the WB-300 set to read in degrees Celsius, verify that the displayed readings
match those printed on the module within +/-0.5oC.
Ifthereadingsarenotwithinthe+/-0.5oCtolerance,thenhavetheunitservicedand
calibrated.
Setup
5Setup
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Figure 5: NiMH Battery Pack
Power Options
Thereare3optionsforpoweringtheWB-300:a9-voltalkalinebattery,aNiMH(NickelMetal
Hydride)rechargeable6-cellbatterypack,andanACadapter.Adooronthebackoftheinstru-
mentallowstheuseraccesstothe9-voltbattery.Therechargeablebatterypackislocatedinside
oftheunit.Iftherechargeablebatterypackeverneedstobereplaced,itcanbeaccessedby
removingthescrewsfromthebottompaneloftheunit.
The2-positionswitchlocatedinthebatterycompartmentmustbesetbytheuserifthepower
supplymethodischanged.Theuppositionisforthe9-voltbattery.Thedownpositionallows
foreithertheACadapterortherechargeablebatteries.TheACadapterwilltricklechargethe
rechargeablebatteriesiftheyareinplaceoritwillsimplyallowforlinepoweroperationoftheunit.
9-V Alkaline Battery Replacement
The9-voltbatteryshouldbereplacedortheNiMHbatterypackshouldberechargedwhenthe
voltagedropsbelow6.4volts.Thebatteryvoltageisdisplayedwhentheinstrumentisturned
on.Whileturnedon,thebatteryvoltagecanbedisplayedatanytimebypressingtheupor
downarrowkeystomovethroughthedisplayuntilthebatteryvoltagescreenappears.If,while
operating,thebatteryvoltagedropsbelow6.4volts,thedisplaywillautomaticallyswitchto
thedisplayshowingthebatteryvoltagealongwithalowbatterymessage.Afteralowbattery
occurs,theunitwillcontinuetooperateforapproximately8hours.Whenthebatteryvoltage
fallsto6.2voltsorbelow,theunitwillautomaticallyturnoff.
NiMH Battery Pack
TheNiMHrechargeablebatterypackischargedintheinstrumentusing120VACto9VDC
adapter.Adischargedbatterypackrequiresachargeof16hours.LeavingtheACadapter
pluggedinforextendedlengthsoftimeorwhenoperatingtheinstrumentwillnotharmthe
rechargeablebatteries.
NiMH Battery Pack
Toinstall,slideintocaseandplugin
connector as shown.
Power Options
6PowerOptions
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Appendix A: Specifications
Measurements
• Globe,drybulb,wetbulb,WBGTi,(WBGTindoor)andWBGTo(WBGToutdoor).
• TemperaturesgiveninCelsiusorFahrenheit.
Languages
English,French,Spanish,Italian,German.
Housing
Designedwaterresistanttoalightrainormist.Ifrainisfrequent,bestpracticewouldbeto
remotethesensorbarandkeeptheinstrumentsheltered.(Note:whentopsensorbaris
removed,anoptionalcablecanbeattachedtomeasureremotely.)
Size
Height9.2in(23.5cm);Width7.2in(18.3mm);Depth3.0in(7.5mm)
Dimensionsincludemountedsensorassembly.
Weight
2.6lbs.(1.2kg)withmountedsensorassembly.
Sensor Types
Temperature:1000ohmplatinumRTD
Accuracy
Temperature:+/-0.5oCbetween0oCto100oC(+/-0.9o Fbetween32o Fto212oF)
Operating Temperature Range
SensorAssembly:-5oCto100oC(23oFto212oF)
Electronics: -5oC to 60oC (23o F to 140o F)
Power Options
9Valkaline,7.2VNiMHrechargeablepack(chargedintheunit),orACadapterwallpowercube(AC
adapter will power the unit or recharge the NiMH battery pack).
Battery Life
9Valkaline:140hours
Rechargeable Nickel MetalHydride:300hours
Charge Time (NiMH Battery Pack)
16hours(chargeintheunit)
Safety Approvals and Special Conditions
CEmark
CompliancewithEssentialHealthandSafetyRequirementshasbeenassuredbycompliancewith:
EN 50014 : 1997 and EN 50020 : 2002
The year of manufacture is determined bythethirdcharacterintheinstrument’sserialnumber.“A”
was manufactured in 2001, “B” in 2002, “C” in 2003, “D” in 2004 and so forth.
Specifications
7AppendixA:Specications
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