Establish thermal equilibrium with at least two hours of exposure. Do not test.Test in accordance with 23.4 and 23.5 or 23.6 or 23.7 as soon as possible to minimize self-heating.Establish thermal equilibrium with at least two hours of exposure. Do not test.Test in accordance with 23.4 and 23.5 or 23.6 or 23.7.Establish thermal equilibrium with at least two hours of exposure. Do not test,