Temperature shock test

Operation Steps：

1. Prepare the glass lid; turn on the refrigerator power switch and adjust to 0℃±2℃.

2. Put the glass lid into the refrigerator （No overlapping）and close the door for 30 min.

3. Put water into the bucket to 2/3 of the total capacity and heat the water to 100℃.

4. Take the glass lid out of the refrigerator and put it into the 98℃±2℃ water bucket quickly.

5. Check the glass lid broken or not. No broken is qualified.