Convective Cold is tested by measuring the power required to maintain a constant temperature on a heated full-scale hand model in the ambient atmosphere of a climatic room which provides uniform conditions. The hand model is typically heated to 30-35°C. The resultant thermal insulation (ITR) is calculated using the hand model temperature, climatic room temperature and the power consumption of the heated hand to maintain a constant temperature.
Thermal Insulation (ITR) in m2°C/W
|1||0.10 ITR < 0.15|
|2||0.15 ITR < 0.22|
|3||0.22 ITR < 0.30|
Contact Cold is tested according to ISO 5085-1 : 1989. The Thermal Resistance (R) is calculated by placing the sample on top of a heated plate with another metal plate (cold plate) placed on top of the sample. This is placed inside a cabinet which has an extractor fan to draw air past the assembly which has a cooling effect on the cold plate. The temperature gradient either side of the sample is measured and compared with the temperature gradient either side of a reference standard. The Thermal Insulation is calculated from the known thermal resistance of the standard and the measured temperature gradients.
Thermal Insulation (R) in m2°C/W
|1||0.025 R < 0.050|
|2||0.050 R < 0.100|
|3||0.100 R < 0.150|
Water Impermeability is tested in accordance with EN 344 : 1992. Water penetration shall not appear less than 30 minutes after the start of the test and is essentially a pass or fail.