ISO 22982-2:2021 Transport Packaging — Temperature controlled transport packages for parcel shipping — Part 2: General specifications of testing. Outside atmosphere temperature An environmental chamber that can consistently maintain the determined outside temperature shall be used. The environmental chamber shall be pre-cooled or pre-heated to the intended temperature condition before the test. Air velocity of the chamber should be uniform and is recommended to be controlled between 0,1 m/s and 2 m/s. Depending on the circumstances, the outside atmosphere temperature shall be determined either by temperature profiles collected from recorded data or pre-determined temperatures set by stakeholders. Clause A.1 gives examples of temperature profiles expressed at different seasons, e.g. summer, winter and spring/autumn. The predetermined temperatures shown in A.2 may be used, e.g. −30 °C ±1 °C, 23 °C ± 1 °C, 40 °C ± 1 °C, etc. Temperature shall be constant within testing periods depending on the parcel delivery duration, e.g. 24 h, 48 h and 72 h. Inside atmosphere temperature When no refrigerant or phase change material is used, temperature changes inside a package can demonstrate the performance of thermal resistance. The following are three types of applications that use refrigerants or phase change materials: a) phase change material, cold water or ice above 10 °C ± 1 °C; b) solid CO 2 that can maintain temperature down to −78,5 °C ± 1 °C (dry ice or eutectic system); c) liquid nitrogen that can maintain temperature down to −195,79 °C ± 1 °C. Commercial parcel shipping usually takes the form of a) or b). Data loggers with built-in temperature measurement sensor and memory are used to measure the outside and inside temperatures of the packages, record the measurement period, and store the data. Sensitivity shall be less than or equal to 0,1 °C and accuracy shall be less than or equal to ±1 °C. Data loggers shall be calibrated before use. The quantity of data loggers, measurement frequencies and measurement locations shall be determined as needed before testing. In cases where refrigerants or phase change material are used, they shall be handled with caution so that the data logger does not contact directly with the product or cooling agents such as PCM or dry ice. Insulation performance test conditions The conditions for insulation performance tests are as follows: a) test in a chamber that is not influenced by direct sunlight, heat sources and can maintain and adjust temperature with less than or equal to ±1 °C during the measurement period; b) preheat or pre-cool the package until the inside temperature is stabilized; c) measure the temperature every 10 min; d) mark the measurement temperature as the mean value of measurement points inside the chamber (package outside) and the package inside respectively; and e) equalize the inside temperature of the package.ISO 22982-2 pdf download.