Temperature control of chamber | (1) Chamber I: 0 ℃, ±0.5 ℃, temperatures in two cold baths are the same. (2) Chamber II: 0 ℃, -17 ℃, ±0.5 ℃, temperatures in two cooling baths are the same. (3) Chamber III: -17 ℃, -34 ℃, ±0.5 ℃,temperatures in two cooling baths are the same. (4) Chamber IV: Ambient to -70 ℃, ±0.5 ℃, temperatures in two cooling baths are the same. |