33 CFR § 159.115
Temperature range test
August 2, 2023
§ 159.115 Temperature range test.
(a) The device must be held at a temperature of 60 °C or higher for a period of 16 hours.
(b) The device must be held at a temperature of −40 °C or less for a period of 16 hours following winterization in accordance with manufacturers' instructions.