temperature of 60°C (140°F)may have effects on some materials that do
not relate to effects of cyclical field conditions.
5.3.1Preferred atmospheres approved by ISO,but not
required in this practice are shown in Table 2.
5.4The measurement of temperature and relative humidity
of the conditioning atmosphere shall be made as close to the
specimen being exposed as is possible.(See Test Method E 337
for a detailed description of methods.)The temperature and
relative humidity indicated at the control point,may not be
representative of conditions elsewhere in the conditioned space
due to local effects or deficiency in air circulation.Tolerances
at the controller usually must be smaller than those at the
specimen.
6.Apparatus
6.1Room (or Cabinet )of such size that sample containers
or packages may be individually exposed to circulating air at
the temperature and relative humidity chosen.
6.1.1Control Apparatus capable of maintaining the room
at the required atmospheric conditions within the tolerance
limits.
6.2Hygrometer —The instrument used to indicate the rela-
tive humidity should be accurate to 62%relative humidity.A
psychrometer may be used either for direct measurement of
relative humidity or for checking the hygrometer (see Test
Method E 337).
6.3Thermometer —Any temperature-measuring device may
be used provided it can accurately indicate the temperature to
within 0.1°C or 0.2°F.The dry-bulb thermometer of the
psychrometer may be used either for direct measurement or foreditorially
checking the temperature-indicating device.
7.Procedure
7.1Obtain containers,packages,or packaging components
in quantity in accordance with the standard governing the test to be performed.Fiberboard containers (and containers fabri-cated from other materials that are affected by changes in humidities greater than 40%)may require preconditioning (see Method D 685).7.2Containers or packages that are sealed with aqueous adhesives should have all seals made sufficiently prior to preconditioning or conditioning so that the water in the adhesive will not be a factor in preconditioning or conditioning of the package.7.3Place the container,package,or packaging component within the conditioning chamber and expose it to the required conditions for an amount of time specified in the particular test procedure.If no time period is specified,a period of at least 72h or that required to reach equilibrium is recommended.The container,package,or packaging component shall be supported in a manner such that all surfaces have free access to the conditioning atmosphere.Heavier packages may be placed on a pallet or other device that should allow for as much exposure of the bottom surface to the conditioning atmosphere as is possible,so long as the device does not cause a permanent change in the box or affect the final test result.7.4Wherever possible,the desired test or measurement should be made at the specified conditioning atmosphere.When this is not possible,the test shall be performed as quickly as possible after the specimen is removed from the condition-ing atmosphere.7.5Alternativel
y,the package may be enclosed in a plastic sheet before removal from the conditioning atmosphere,in a manner such that the plastic will not interfere with the particular test,so that the package will neither gain or lose moisture.Here too,the package shall be tested as quickly as possible after removal from the conditioning atmosphere.8.Report 8.1The report of the test on the conditioned package shall include the following:8.1.1Temperature,relative humidity,and time of exposure.8.1.1.1Preconditioning atmosphere and time of exposure when used.8.1.2Statement of compliance with this procedure.8.1.3Variations from this procedure,including the testing temperature and relative humidity if different from the condi-tioning atmosphere,the time elapsed,and so forth.9.Precision and Bias 9.1A statement of precision and bias is not applicable to this practice.10.Keywords 10.1conditioning;conditions;containers;environment;ma-
terials;packages
TABLE 1Special Atmospheres
Environment (ISO 2233Condition)Temperature,°C (°F)Relative
Humidity,%
Cryogenic (A)−5563(−6766)...
Frozen food storage (C)−1862(064)...
Refrigerated storage (D)562(4164)8565
Temperate high humidity (F)2062(6864)9065
Tropical (L)4062(10464)9065
Desert 6062(14064)1562
TABLE 2Preferred Atmospheres Listed in ISO 2233
Condition Temperature,°C (F)Relative Humidity,%
B −3563(−4966)not specified
E 2062(6864)65
H 2762(8164)65
J 3062(8664)90
K 4063(10466)uncontrolled
M 5562(13164)
30
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