By Authority OfTHE UNITED STATES OF AMERICALegally Binding
DocumentBy the Authority Vested By Part 5 of the United States Code
552(a) and Part 1 of the Code of Regulations 51 the attached
document has been duly
INCORPORATEDBYREFERENCEandshallbeconsideredlegally
bindinguponallcitizensandresidentsoftheUnitedStatesofAmerica. HEED
THIS NOTICE: Criminal penalties may apply for noncompliance.
Official Incorporator:THE EXECUTIVE DIRECTOROFFICE OF THE FEDERAL
REGISTERWASHINGTON, D.C.Document Name: CFR Section(s): Standards
Body: eASTM D2247: Standard Practice for Testing Water Resistance
of Coatings in 100 Percent RelativeHumidity 24 CFR 200, Subpart
SAmerican Society for Testing and MaterialsDesignation:D2247-
68(Reapproved1973) StandardMethodforTesting COATEDMETALSPECIMENSAT
100PERCENTRELATIVEHUMIDITyl This Standardisunder
thefixeddesignationD 2247:thenumber immediately followingthe
indicates the year of originaladoptionor, inthe caseof
revision,theyear of lastrevision.AnUinberinparentheses indIcates
the yearof lastreapproval. 1.Scope 1.1This method covers the
requirements for
testingcoatedmetalspecimensat100%rela-tivehumiditywithcondensationonthetest
specimensatalltimes. 2.Apparatus 2.1Theapparatusshallbeofsuchdesign
and construction as to satisfy the conditions of
thetest.Thetestcabinetshallconsistofa
chamberwhichwillprovidesupportforthe
specimensandincludethenecessarymeans for controlof temperature
andrelative h umid-ity.Suitableapparatusthatmaybeusedto
obtaintheseconditionsisdescribedinthe Annexes. 2.2Materialsof
constructionshallbesuch thattheywillneitheraffectnorbeaffectedby
thetest. 3.TestSpecimens 3.1Thetypeandnumberof testspecimens
tobeusedshallbedefinedinthe specifications
coveringthematerialorproductbeingtested
orshallbemutuallyagreeduponbythe purchaserandtheseller.
4.Preparationof TestSpecimens 4.1Themethodsof
application,filmthick-ness,curing,andconditioningofthetest
surfaceshallbeagreeduponbythepurchaser andtheseller.
NOTEI-Applicationandfilmthicknessmeas-urementASTMmethodsaregivenasfollows:
MethodsD 823,ProducingFilmsofUniform Thicknessof
Paint,Varnish,Lacquer,andRelated ProductsonTestPanels,"
MethodD1005,MeasurementofDryFilm Thicknessof OrganicCoatings,2
MethodD1186,MeasurementofDryFilm
ThicknessofNonmagneticOrganicCoatingsAp-pliedonaMagneticBase,2and
MethodsD1400,MeasurementofDryFilm
ThicknessofNonmetallicCoatingsofPaint,Var-nish,Lacquer,andRelatedProductsAppliedona
NonmagneticMetalBase.2 4.2Wheneveritisdesiredtodetermine the
developmentof corrosionorblistercreepage fromanabraded
areaintheorganic coating, a scratchorscribedlineshallbemadethrough
thecoatingwithasharpinstrument. NOTE2-See ASTMMethodD1654,
Evaluation of Painted or Coated Specimens Subjected to
Corro-siveEnvironments.2 4.3Thebacks,cutedgesoftheplated,
coated,orduplexmaterials,andthoseareas
containingidentificationmarksorincontact
withtheracksorsupports,shallbeprotected
withasuitablecoatingthatisstableunder the conditionsof thetest.
5.Positionof SpecimensDuringTest 5.1Thepositionofthespecimensinthe
testcabinetduringthetestshallbesuchthat
thefollowingconditionsaremet: 5.1.1The specimensshallbesoplacedasto
permitcondensationtooccuronthetest surface.
5.1.2Inordertoavoidagalvaniccouple, thetestspecimens
shallnotcontact eachother oranymetallicmaterial.
IThismethodisunderthejurisdictionof
ASTMCom-mitteeD-IonPaint,Varnish,Lacquer,andRelatedProd-ucts..
Current edition accepted Sept.13,1968.Originally Issued
1964.ReplacesD 2247- 66T. '1974Annual Bookof ASTM Standards.Part27.
398 Designation:D2247- 68(Reapproved1973) StandardMethodforTesting
COATEDMETALSPECIMENSAT 100PERCENTRELATIVEHUMIDITyl This
Standardisunder thefixeddesignationD 2247:thenumber immediately
followingthe indicates the year of originaladoptionor, inthe caseof
revision,theyear of lastrevision.Anumber inparentheses mdlcates the
yearof lastreapproval. 1.Scope 1.1This method covers the
requirements for
testingcoatedmetalspecimensat100%rela-tivehumiditywithcondensationonthetest
specimensatalltimes. 2.Apparatus 2.1Theapparatusshallbeofsuchdesign
and construction as to satisfy the conditions of
thetest.Thetestcabinetshallconsistofa
chamberwhichwillprovidesupportforthe
specimensandincludethenecessarymeans for controlof temperature
andrelative h umid-ity.Suitableapparatusthatmaybeusedto
obtaintheseconditionsisdescribedinthe Annexes. 2.2Materialsof
constructionshallbesuch thattheywillneitheraffectnorbeaffectedby
thetest. 3.TestSpecimens 3.1Thetypeandnumberof testspecimens
tobeusedshallbedefinedinthe specifications
coveringthematerialorproductbeingtested
orshallbemutuallyagreeduponbythe purchaserandtheseller.
4.Preparationof Test Specimens 4.1Themethodsof
application,filmthick-ness,curing,andconditioningofthetest
surfaceshallbeagreeduponbythepurchaser andtheseller.
NOTEI-Applicationandfilmthicknessmeas-urementASTMmethodsaregivenasfollows:
MethodsD 823,ProducingFilmsofUniform Thicknessof
Paint,Varnish,Lacquer,andRelated ProductsonTestPanels," MethodD
1005,MeasurementofDryFilm Thicknessof OrganicCoatings,2 MethodD
1186,MeasurementofDryFilm
ThicknessofNonmagneticOrganicCoatingsAp-pliedonaMagneticBase,2and
MethodsD 1400,MeasurementofDryFilm
ThicknessofNonmetallicCoatingsofPaint,Var-nish,Lacquer,andRelatedProductsAppliedona
NonmagneticMetalBase.2 4.2Wheneveritisdesiredto determine the
developmentof corrosionorblistercreepage fromanabraded
areaintheorganic coating, a scratchorscribedlineshallbemadethrough
thecoatingwithasharpinstrument. NOTE2-See ASTMMethodD 1654,
Evaluation of Painted or Coated Specimens Subjected to
Corro-siveEnvironments.2 4.3Thebacks,cutedgesoftheplated,
coated,orduplexmaterials,andthoseareas
containingidentificationmarksorincontact
withtheracksorsupports,shallbeprotected
withasuitablecoatingthatisstableunder the conditionsof thetest.
5.Positionof SpecimensDuringTest 5.1Thepositionofthespecimensinthe
testcabinetduringthetestshallbesuchthat
thefollowingconditionsaremet: 5.1.1The specimensshallbesoplacedasto
permitcondensationtooccuronthetest surface.
5.1.2Inordertoavoidagalvaniccouple, thetestspecimens
shallnotcontact eachother oranymetallicmaterial.
IThismethodisunderthejurisdictionof
ASTMCom-mitteeD-IonPaint,Varnish,Lacquer,andRelatedProd-ucts.
Current edition accepted Sept.13,1968.Originally issued
1964.ReplacesD 2247- 66T. '1974Annual Bookof ASTM Standards.Part27.
398 5.1.3Drops of water that accumulate on the
ceilingorcoverofthechambershannotbe permitted to fall on the
specimens being tested. 5.1.4Dropsofwaterfromonespecimen
shannotdroponanyotherspecimens. 6.ConditionsintheHumidityChamber
6.1Thetemperatureofthesaturatedair
shallbethermostaticallymaintainedatatem-peratureof 38IC(1002F).
6.2Theremustbe100%relativehumidity
withcondensationonthetestpanelsatall times. 7.Continuityof Test
7.1Thetestmaybeusedasacontinuous humiditytestor aspartof
acycletest. 7.2Continuousoperationimpliesthatthe
chamberwillbeclosedandthat theconditions
describedinSection6willbemetexceptfor
theshortinterruptionsnecessarytoinspector
makenecessarychanges.Theseinterruptions shallbeheldtoaminimum.
7.3Therequirednumberof hoursof expo-suretothe testaspart of acycle
test tooneor more other environments shall be designated in
thespecifictestprocedure. 8.Examination of Specime.ns
8.1Whenthespecimensarereadyforex-amination, theyshall carefully
beremoved and thencarefullydriedbyblowingwithairor
blottingwithabsorbent paper or cloth.During theprogress o(the test,
examination for deteri-orationofthetestspecimenshallbemade
immediately.Thespecimensshallnotbeal-lowedtoremainoutof
thechamberinexcess of1/2h,unlessotherwisespecified.Atthe
conclusionof the test,whenphysical ratings or
ratingsfordegreeofrecoveryofthetest 02247
surfacearespecified,thespecimensshallbe
allowedtostandfor24hinanatmosphere at 25I C(772 F) having arelative
humidity of505%.Theythenshallbereexamined.
Thetestsurfaceshallbeexaminedforfailures
specificallyagreeduponbythepurchaserand theseller. NOTE3-The
followingASTMmethodsof eval-uatingfinishdegradationinthemethodare
applica-ble: MethodD 523,of TestforSpecular Gloss,2 MethodD
610,EvaluatingDegreeof Rustingon PaintedSteelSurfaces, 2 MethodD
714,Evaluating Degree of Blistering of Paints,2
MethodsD1474,TestforIndentationHardness of OrganicCoatings, 2
MethodD1654,Evaluationof Painted or Coated
SpecimensSUbjectedtoCorrosiveEnvironments,2 and MethodD
2197,TestforAdhesionofOrganic Coatings.2 9.Periodof Test 9.1The
periodof test,andtheintermediate
examinationperiod,shallbeasdesignatedby
thespecificationcoveringthematerialunder
testorasmutuallyagreeduponbythepur-chaser andtheseller. 10.Reports
10.1Thereportshallincludethefollowing:
10.1.1Temperaturereadingswithinthe ex-posurezoneof thecabinet,and
10.1.2Exposureperiod. 11.Precision
11.1Thismethodcoversthedetermination of theeffectof
highhumidityoncoatedspeci-mens. The diversemethodsof rating
forfailure ofthespecimens,andtheirdifferentvalues,
precludemakingastatementof precision. ANNEXES AI.TESTCABINET
ALlApparatus A 1.1.1Cabinet-The methodrequires a test
cabi-netthatwillcause condensationtooccur onthetest
specimens.Thismaybeaccomplishedbytheintro-ductionofmoistureatatemperatureabovethe
. controlledtemperatureofthecabinet.Acabinet constructed
torequireadditional heated humidair to
.producethedesiredtemperatureaftertheairwithin
thechamberhasreachedsaturation(100%relative
humidity)willcausecondensationonthetestspeci-mens.Cabinetsoftheconstructiondescribedin
SectionA2willproducetherequiredconditions. A 1.2Constructionof
Cabinet A 1.2.1Thehumiditycabinetshallconsistofa
basicchamber,specimensupports,awatertank, 399 5.1.3Drops of water
that accumulate on the ceilingorcoverofthechambershannotbe
permitted to fall on the specimens being tested.
5.1.4Dropsofwaterfromonespecimen shannotdroponanyotherspecimens.
6.ConditionsintheHumidityChamber 6.1Thetemperatureofthesaturatedair
shallbethermostaticallymaintainedatatem-peratureof 38IC(1002F).
6.2Theremustbe100%relativehumidity
withcondensationonthetestpanelsatall times. 7.Continuityof Test
7.1Thetestmaybeusedasacontinuous humiditytestor aspartof
acycletest. 7.2Continuousoperationimpliesthatthe
chamberwillbeclosedandthat theconditions
describedinSection6willbemetexceptfor
theshortinterruptionsnecessarytoinspector
makenecessarychanges.Theseinterruptions shallbeheldtoaminimum.
7.3Therequirednumberof hoursof expo-suretothe testaspart of acycle
test tooneor more other environments shall be designated in
thespecifictestprocedure. 8.Examination of Specime.ns
8.1Whenthespecimensarereadyforex-amination, theyshall carefully
beremoved and thencarefullydriedbyblowingwithairor
blottingwithabsorbent paper or cloth.During theprogress o(the test,
examination for deteri-orationofthetestspecimenshallbemade
immediately.Thespecimensshallnotbeal-lowedtoremainoutof
thechamberinexcess of1/2h,unlessotherwisespecified.Atthe
conclusionof the test,whenphysical ratings or
ratingsfordegreeofrecoveryofthetest 02247
surfacearespecified,thespecimensshallbe
allowedtostandfor24hinanatmosphere at 25I C(772 F) having arelative
humidity of505%.Theythenshallbereexamined.
Thetestsurfaceshallbeexaminedforfailures
specificallyagreeduponbythepurchaserand theseller. NOTE3-The
followingASTMmethodsof eval-uatingfinishdegradationinthemethodare
applica-ble: MethodD 523,of TestforSpecular Gloss,2 MethodD
610,EvaluatingDegreeof Rustingon PaintedSteelSurfaces, 2 MethodD
714,Evaluating Degree of Blistering of Paints,2
MethodsD1474,TestforIndentationHardness of OrganicCoatings, 2
MethodD1654,Evaluationof Painted or Coated
SpecimensSUbjectedtoCorrosiveEnvironments,2 and MethodD
2197,TestforAdhesionofOrganic Coatings.2 9.Periodof Test 9.1The
periodof test,andtheintermediate
examinationperiod,shallbeasdesignatedby
thespecificationcoveringthematerialunder
testorasmutuallyagreeduponbythepur-chaser andtheseller. 10.Reports
10.1Thereportshallincludethefollowing:
10.1.1Temperaturereadingswithinthe ex-posurezoneof thecabinet,and
10.1.2Exposureperiod. 11.Precision
11.1Thismethodcoversthedetermination of theeffectof
highhumidityoncoatedspeci-mens. The diversemethodsof rating
forfailure ofthespecimens,andtheirdifferentvalues,
precludemakingastatementof precision. ANNEXES AI.TESTCABINET
ALlApparatus A 1.1.1Cabinet-The methodrequires a test
cabi-netthatwillcause condensationtooccur onthetest
specimens.Thismaybeaccomplishedbytheintro-ductionofmoistureatatemperatureabovethe
. controlledtemperatureofthecabinet.Acabinet constructed
torequireadditional heated humidair to
.producethedesiredtemperatureaftertheairwithin
thechamberhasreachedsaturation(100%relative
humidity)willcausecondensationonthetestspeci-mens.Cabinetsoftheconstructiondescribedin
SectionA2willproducetherequiredconditions. A 1.2Constructionof
Cabinet A 1.2.1Thehumiditycabinetshallconsistofa
basicchamber,specimensupports,awatertank, 399
provisionsforheatingthewatertank,andsuitable controls
formaintaining the desired temperature and relativehumidity.. A
1.2.2Accessoriessuchasanauxiliarywater
tankwithoverflowoutletandautomaticlevelcon-trolarepertinentpartsof
theapparatus. A 1.2.3Thecabinetshouldbeof sufficientsizeto
testadequatelythedesirednumber of parts without
over-crowding;itshouldbeofsufficientsizeto
positionthetestpartsawayfromtheheatedwater
tankinthehumidatmospherewherecondensation
willoccur.Itisdifficulttoproducethedesired
saturatedairconditionswithinsmallcabinets,and those of lessthan
20ft' (0.57m ') capacity shouldbe avoided. A
1.2.4Thechambermaybemadeofpl!lstic, metal lined witli
imperviousmaterials, or of building
materialsadequatelywaterproofedtopreventmois-turepenetration. A
1.2.5Allpiping, tanks, supports, etc., shouldbe of
corrosion-resistantmaterials. AI.3Temperawre andHumidityControl A
1.3.1Themaintenanceof
temperatureandhu-miditywithinthehumiditychambercanbeaccom-plishedbyseveral
methods.The preferredmethodis bytheuseof aninsulatedwater
tankheatedbyan 02247 immersionheater.Thewatertanksizeshouldbe
limitedtonomore than 25 % of the floorarea of the cabinet.The water
temperature shall benolessthan 8.3C(15F)higherthanthe
desiredtemperatureof thehumiditychamber.Awatertemperaturelimit
controlisrequired.Thethermostaticcontrollerfor the chamber
temperature isthe primary limit control fortheimmersionheater. A
1.3.2Insulationofthechambersidewallsis
arbitrary.Excessiveinsulation canminimize the heat
andmoisturevaporinputsufficientlytoprevent adequatemoisture
accumulation withinthe chamber
sothatcondensationwillnotoccur.Insmaller
chambersitmaybenecessarytowater-coolthe cover to depress the humid
air temperature below the dewpoint. A
1.3.3Inlargechambers,acirculatingfanmay
berequiredtoprovideuniformconditions.The
locationandtypeoffanisdiscretionary;however,
theairmovementshouldbenomorethantwoair changesperhour. A 1.4Types
of Construction A 1.4.1A laboratory humidity cabinet isshownin
Fig.A 1.Walk-in chambers,as showninFig.A2,are
notusuallyconstructedwithasloping ceilingdueto their
sizeandlocation.
A2_ALTERNATIVECONSTRUCTIONOFAPPARATUS(FORFLATPANELSORTHIN
PARTSWITHSTRAIGHTEDGESTHATALLOWBUTTING)' A2.1Apparatus
A2.1.1Cabinel-Thehumiditycabinetconsists of anair-ventedbasic cham
ber,the topof whichare the testspecimens, the sides of whichact as
specimen supports,awater tank,meansof heatingthewater,
andasuitablemeansforestablishinguniformheat
input.Accessoriessuchasanautomaticwaterlevel controlmaybeinstalled.
A2.1.2Thecabinetshouldbeof sufficient sizeto testthedesirednumberof
panelsandmaybemade of plastic,metallinedwithimperviousmaterials,or
of inertbuilding materials adequatelywaterproofed,
andpreferaplycontaininginsulatingqualities.
A2.1.3Tanksshouldbeofcorrosion-resistant
materials.Accessoriesnotofcorrosion-resistant
materialsshouldbeprotectedwithaprotective
coatingorbyplacingthemontheexteriorofthe cabinet.
A2.2TemperatureandHumidityControl
A2.2.1Theheatinputshallbeadjustedsothat
thetemperatureofthewatervaporIin.(25mm) belowthe test surface is
established at 38I C (100 2F)(atnormalroomairtemperatures25IC
(772F. Once established,nofurtheradjustment isnecessary or
desirable; saturated air temperature is
allowedtoriseorfallwithfluctuationsofroom
temperature,thusmaintainingafairlyconstant rate of
condensationwhichisknowntooccur at allroom
temperaturesfrom10to50C(50to120F).
Temperatureadjustmentmustbemadewithalltest positions occupied.Room
temperature shouldnot be allowed to deviate more than4 C ( 7 F)
during the testperiod.Relativehumidity shall be automatically
maintainedat100%whentheroomtemperatureis
lowerthanthesaturatedairtemperature. A2.3Typesof Construction
A2.3.1Thesizeanddetailedconstructionof the
apparatusareoptionalprovidedtheconditionsob-tainedmeettherequirementsofthemethod.A
ClevelandCondensingHumidityCabinet,withthe dimensions asgiveninFig.
A3, provides the required conditions. A2.4Positionof
SpecimensDuring Test A2.4.1Thecoatedflatpanelswithstraightand
coatedor tapededgesshallbebuttedtogetherwith
thetestsidefacingdownacrossthetopofthe
cabinet.Properlyinstalled,thepanelswillbeina slightly sloped
position toreturn excess condensation
tothewatertankwithoutrunningonothertest
panels.Blanksmustfillnontestareasonthetopof
thecabinet.Glassblankspermitobservationof
condensation.Sincethebacksidesof testpanelsare
notsubjecttoexposure,itisnotnecessarythatthey becoated.
3Thespecincationsorthisannexaretheresultor
researchpresentedbytheClevelandSocietyor theFedera-tionor
SocietiesrorPaintTechnologyatthe41stAnnual
MeetinginPhiladelphia,Pa.,Oct.31.1963("Cleveland
CondensingTypeHumidityCabinet,"Foecking,N.J.,
OfficialDigestODFPA.December,1963,pp.1318-1327)
andatthe43rdAnnualMeetingoftheFederationof
So-cietiesforPaintTechnology,AtlanticCity,N.J.,Oct.28,
1965("ClevelandCondensingType HumidityCabinet:"."
Higgins,W.A.,OfficialDigest,ODFPA.November1965, pp.1392-1404) 400
provisionsforheatingthewatertank,andsuitable controls
formaintaining the desired temperature and relativehumidity.. A
1.2.2Accessoriessuchasanauxiliarywater
tankwithoverflowoutletandautomaticlevelcon-trolarepertinentpartsof
theapparatus. A 1.2.3Thecabinetshouldbeof sufficientsizeto
testadequatelythedesirednumber of parts without
over-crowding;itshouldbeofsufficientsizeto
positionthetestpartsawayfromtheheatedwater
tankinthehumidatmospherewherecondensation
willoccur.Itisdifficulttoproducethedesired
saturatedairconditionswithinsmallcabinets,and those of lessthan
20ft' (0.57m ') capacity shouldbe avoided. A
1.2.4Thechambermaybemadeofpl!lstic, metal lined witli
imperviousmaterials, or of building
materialsadequatelywaterproofedtopreventmois-turepenetration. A
1.2.5Allpiping, tanks, supports, etc., shouldbe of
corrosion-resistantmaterials. AI.3Temperawre andHumidityControl A
1.3.1Themaintenanceof
temperatureandhu-miditywithinthehumiditychambercanbeaccom-plishedbyseveral
methods.The preferredmethodis bytheuseof aninsulatedwater
tankheatedbyan 02247 immersionheater.Thewatertanksizeshouldbe
limitedtonomore than 25 % of the floorarea of the cabinet.The water
temperature shall benolessthan 8.3C(15F)higherthanthe
desiredtemperatureof thehumiditychamber.Awatertemperaturelimit
controlisrequired.Thethermostaticcontrollerfor the chamber
temperature isthe primary limit control fortheimmersionheater. A
1.3.2Insulationofthechambersidewallsis
arbitrary.Excessiveinsulation canminimize the heat
andmoisturevaporinputsufficientlytoprevent adequatemoisture
accumulation withinthe chamber
sothatcondensationwillnotoccur.Insmaller
chambersitmaybenecessarytowater-coolthe cover to depress the humid
air temperature below the dewpoint. A
1.3.3Inlargechambers,acirculatingfanmay
berequiredtoprovideuniformconditions.The
locationandtypeoffanisdiscretionary;however,
theairmovementshouldbenomorethantwoair changesperhour. A 1.4Types
of Construction A 1.4.1A laboratory humidity cabinet isshownin
Fig.A 1.Walk-in chambers,as showninFig.A2,are
notusuallyconstructedwithasloping ceilingdueto their
sizeandlocation.
A2_ALTERNATIVECONSTRUCTIONOFAPPARATUS(FORFLATPANELSORTHIN
PARTSWITHSTRAIGHTEDGESTHATALLOWBUTTING)' A2.1Apparatus
A2.1.1Cabinel-Thehumiditycabinetconsists of anair-ventedbasic cham
ber,the topof whichare the testspecimens, the sides of whichact as
specimen supports,awater tank,meansof heatingthewater,
andasuitablemeansforestablishinguniformheat
input.Accessoriessuchasanautomaticwaterlevel controlmaybeinstalled.
A2.1.2Thecabinetshouldbeof sufficient sizeto testthedesirednumberof
panelsandmaybemade of plastic,metallinedwithimperviousmaterials,or
of inertbuilding materials adequatelywaterproofed,
andpreferaplycontaininginsulatingqualities.
A2.1.3Tanksshouldbeofcorrosion-resistant
materials.Accessoriesnotofcorrosion-resistant
materialsshouldbeprotectedwithaprotective
coatingorbyplacingthemontheexteriorofthe cabinet.
A2.2TemperatureandHumidityControl
A2.2.1Theheatinputshallbeadjustedsothat
thetemperatureofthewatervaporIin.(25mm) belowthe test surface is
established at 38I C (100 2F)(atnormalroomairtemperatures25IC
(772F. Once established,nofurtheradjustment isnecessary or
desirable; saturated air temperature is
allowedtoriseorfallwithfluctuationsofroom
temperature,thusmaintainingafairlyconstant rate of
condensationwhichisknowntooccur at allroom
temperaturesfrom10to50C(50to120F).
Temperatureadjustmentmustbemadewithalltest positions occupied.Room
temperature shouldnot be allowed to deviate more than4 C ( 7 F)
during the testperiod.Relativehumidity shall be automatically
maintainedat100%whentheroomtemperatureis
lowerthanthesaturatedairtemperature. A2.3Typesof Construction
A2.3.1Thesizeanddetailedconstructionof the
apparatusareoptionalprovidedtheconditionsob-tainedmeettherequirementsofthemethod.A
ClevelandCondensingHumidityCabinet,withthe dimensions asgiveninFig.
A3, provides the required conditions. A2.4Positionof
SpecimensDuring Test A2.4.1Thecoatedflatpanelswithstraightand
coatedor tapededgesshallbebuttedtogetherwith
thetestsidefacingdownacrossthetopofthe
cabinet.Properlyinstalled,thepanelswillbeina slightly sloped
position toreturn excess condensation
tothewatertankwithoutrunningonothertest
panels.Blanksmustfillnontestareasonthetopof
thecabinet.Glassblankspermitobservationof
condensation.Sincethebacksidesof testpanelsare
notsubjecttoexposure,itisnotnecessarythatthey becoated.
3Thespecincationsorthisannexaretheresultor
researchpresentedbytheClevelandSocietyor theFedera-tionor
SocietiesrorPaintTechnologyatthe41stAnnual
MeetinginPhiladelphia,Pa.,Oct.31.1963("Cleveland
CondensingTypeHumidityCabinet,"Foecking,N.J.,
OfficialDigestODFPA.December,1963,pp.1318-1327)
andatthe43rdAnnualMeetingoftheFederationof
So-cietiesforPaintTechnology,AtlanticCity,N.J.,Oct.28,
1965("ClevelandCondensingType HumidityCabinet:"."
Higgins,W.A.,OfficialDigest,ODFPA.November1965, pp.1392-1404) 400 ~
~ l ~ 02247 0')17 I9 I ~ I- - - ------rrJ O-Angle of lid,90to125deg
I-Hingedtop,hydraulicallyoperated.orcounterbalanced 2-Water seal
3-Constant-Ievelwatertankunheatedwithoverflowoutletandequalizerconnection
4-Heated watertankforsupplyingheatandhumiditytocabinet
5-lmmersionheater 6-W,ater temperaturelimitcontrol.
7-Thermostaticcontrollerforroomtemperature.Primarylimitcontrolforimmersionheater(5)
8-Water line 9-lnsulationif necessary(seeA2.1.2)
10-Temperaturerecorder(optional) II-Drain FIG.AlHumidityCabinet.
401 ~ ~ l ~ 02247 2 o'n7 ~ 98 ~ I- - - ------rr--J O-Angle of
lid,90to125deg I-Hingedtop,hydraulicallyoperated.orcounterbalanced
2-Water seal
3-Constant-levelwatertankunheatedwithoverflowoutletandequalizerconnection
4-Heated watertankforsupplyingheatandhumiditytocabinet
5-lmmersionheater 6-W,ater temperaturelimitcontrol.
7-Thermostaticcontrollerforroomtemperature.Primarylimitcontrolforimmersionheater(5)
8-Water line 9-lnsulationif necessary(seeA2.1.2)
10-Temperaturerecorder(optional) II-Drain FIG.AlHumidityCabinet.
401 ~ ~ ~ D2247 2 3 4 I-Temperature recorder 2-Fiberglass
doorwithmagneticclosersandrubberseal;inwardslopingsill 3-Light
switch 8 7 5 6 4-Thermostatic
controllerforroomtemperature.Primarylimitcontrolforimmersionheater(6)
5-Heated watertankforsupplyingheatandhumiditytoroom
6-lmmersionheater 7-Water temperaturelimitcontrol 8-Constant
levelwatertankunheatedwithoverflowoutlet 9-Equalizer connection
to-Floor drain
NOTE-Thechambershallfeaturewaterproofconstructionwithinsulationandvaporprooffixturesontheinterior;
lightingmaybeaccomplishedwithafluorescentfixtureaboveinsulating
glasssealedintheceiling.Polyvinylchloridepipe
andflangesshallbeusedforsleevesthroughwalls.
FIG.A2Walk-InHumidityChamber. 402 ~ ~ ~ D2247 2 3 4 I-Temperature
recorder 2-Fiberglass
doorwithmagneticclosersandrubberseal;inwardslopingsill 3-Light
switch 4-Thermostatic
controllerforroomtemperature.Primarylimitcontrolforimmersionheater(6)
5-Heated watertankforsupplyingheatandhumiditytoroom
6-lmmersionheater 7-Water temperaturelimitcontrol 8-Constant
levelwatertankunheatedwithoverflowoutlet 9-Equalizer connection
to-Floor drain
NOTE-Thechambershallfeaturewaterproofconstructionwithinsulationandvaporprooffixturesontheinterior;
lightingmaybeaccomplishedwithafluorescentfixtureaboveinsulating
glasssealedintheceiling.Polyvinylchloridepipe
andflangesshallbeusedforsleevesthroughwalls.
FIG.A2Walk-InHumidityChamber. 402 ~ ~ 02247 I-End
supports,%by61/8in.byI ft3 1/,in.(1.9by15.5by39.4 cm)
(slanted1(4in./8 in.(0.64 cm/20.3 cm) toward center). 2-Raised
sidesupports,:v.by4'18in.by4.0ft.(1.9by12.4by122em). 3-Tank
spacers,1(2by'V8by21;,in.(1.3by0.95by6.4em). 4-Water
tank,14V,by461/2by3in.(36.8by118by7.6em)(distilledwaterandstainlesssteelpreferred).
S-Depressed
centralpanelsupport(rigidinsulatingtype,forexample,methyl
methacrylateresin). 6-Six stripheaters(attachedtobottomof
tank)spacedequallyforuniformheat,rheostat-controlled(llS-V,ISO-Wsteel
sheathstripheatersand71/,-A capacityrheostat). 7-Tank
supportandheatbarrier,%by['Is-in.(t.9by3.5-cm)stock. 8-Typical
8-in. (20.3-cm) long test panels or blanks (all positions oncabinet
mustbe occupied) (blanks may be glass).
9-Thermometer(bulbIin.(2.5cm)belowtestsurface). NOTEI-Arrangement
of 2 and3 oermitsaccessof freshair. NOTE2-A
satisfactoryconstructionmaterialis%-in.(1.9-cm)exterior
gradeplywoodcoated withapolyamidecross-linkedepoxy.-FI
G.A3.ClevelandCondensingHumidityCabinet. By publication of this
standard no position istaken with respect tothe validity ofany
patent rights in connection /-herewith, andtheAmericanSociety
forTestingandMaterialsdoesnotundertaketoinsureanyoneutilizingthestandardDgainst
liability for infringement of any Letters Patent nor assume any
such liability. 403 ~ ~ 02247 I-End supports,%by61/8in.byI ft3
1/,in.(1.9by15.5by39.4 cm) (slanted1(4in./8 in.(0.64 cm/20.3 cm)
toward center). 2-Raised
sidesupports,:v.by4'18in.by4.0ft.(1.9by12.4by122em). 3-Tank
spacers,1(2by'V8by21;,in.(1.3by0.95by6.4em). 4-Water
tank,14V,by461/2by3in.(36.8by118by7.6em)(distilledwaterandstainlesssteelpreferred).
S-Depressed
centralpanelsupport(rigidinsulatingtype,forexample,methyl
methacrylateresin). 6-Six stripheaters(attachedtobottomof
tank)spacedequallyforuniformheat,rheostat-controlled(llS-V,ISO-Wsteel
sheathstripheatersand71/,-A capacityrheostat). 7-Tank
supportandheatbarrier,%by['Is-in.(t.9by3.5-cm)stock. 8-Typical
8-in. (20.3-cm) long test panels or blanks (all positions oncabinet
mustbe occupied) (blanks may be glass).
9-Thermometer(bulbIin.(2.5cm)belowtestsurface). NOTEI-Arrangement
of 2 and3 oermitsaccessof freshair. NOTE2-A
satisfactoryconstructionmaterialis%-in.(1.9-cm)exterior
gradeplywoodcoated withapolyamidecross-linkedepoxy.-FI
G.A3.ClevelandCondensingHumidityCabinet. By publication of this
standard no position is taken with respect tothe validity ofany
patent rights in connection /-herewith, andtheAmericanSociety
forTestingandMaterialsdoesnotundertaketoinsureanyoneutilizingthestandardDgainst
liability for infringement of any Letters Patent nor assume any
such liability. 403
