Household refrigerating appliances-Characteristics and test methods(lS0 15502:2005)English version of DIN EN ISO 15502:2006
Test packages
1. Dimensions and tolerances：
The test packages used in the tests shall be in the form of rectangular parallelepipeds. Their size, prior to freezing, and their mass, packaging included, shall be in accordance with Table 3.
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Dimension（mm）
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Tolerance
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Mass（g）
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Tolerance
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25 × 50 × 100
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± 2.0mm for dimensions
25 and 50;
± 3.0mm for dimensions 100 and 200
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125
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±2%
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50 × 50 × 100
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250
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25 × 100 × 100
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250
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25 × 100 × 200
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500
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50 × 100× 100
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500
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50 × 100 × 200
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1000
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Test packages shall be checked regularly and shall not present visible holes or cracks on the wrapper.
When any package is found to exceed a tolerance according to Table 3, it shall be replaced by a new package.
2. Composition
The packages shall consist of the following.
a)A suitable filling material containing, per 1 000 g:
--230 g of oxyethylmethylcellulose;
--764.2 g of water;
--5 g of sodium chloride;
--0,8 g of 6-chloro-m-cresol.
The freezing point of this material is - 1 °C (its thermal characteristics correspond to those of lean beef)
.b) The following alternative composition of test packages with a freezing point near - 5 °C may be used:
--232 g of oxyethyimethylcellulose;
--725 g of water;
--43 g of sodium chloride;
--0.6 g of 6-chloro-m-cresol.
In case of dispute, the composition of test package a) shall be used as the reference test package. For the measurement of chill compartments, only test package b) with a freezing point of - 5 °C, shall be used.
c) A wrapper, consisting of a sheet of plastic or any other suitable material of such a nature that exchange of moisture with the ambient medium is negligible. After filing, the wrapping sheet shall be sealed. lt is advisable to use a laminated sheet, consisting of layer of high-pressure polyethylene, easily sealable120 um thick, together with an external sheet of polyethyleneterephthalate approximately 12.5 um thick. the two layers being bonded together.
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