A: Use: "Conditioned per ASTM D618-21, Cycle A (23°C ± 2°C / 50% RH ± 5%) for 72 hours."
Conditioning fails most often when a technician removes a specimen from a 23°C chamber and carries it across a 35°C factory floor. The standard requires testing immediately or within a specified "grace period" (typically 1 minute for critical properties). Common Misconceptions About D618-21 Myth 1: "It only applies to mechanical testing." False. ASTM D618-21 explicitly covers electrical, optical, and even thermal testing. astm d618-21 pdf
Verify that your humidity chamber can hold 23°C ± 2°C and 50% RH ± 5% (or ±3% per the new tolerances). Calibrate your sensors annually. A: Use: "Conditioned per ASTM D618-21, Cycle A