| Temp (°C) | Temp. changing rate (°C/hr) | Duration (hr) |
|---|---|---|
| −140 | - | 1 |
| −140 to −90 | 5 | 10 |
| −90 | - | 31 |
| −90 to −45 | 5 | 9 |
| −45 | - | 5 |
| −45 to −20 | 5 | 5 |
| −20 | - | 2 |
| −20 to −45 | 5 | 5 |
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