1. The temperature indicator turns the gland on the outer ring of the dial counter-clockwise, opens the gland, and pries lightly one word (only the part below the gasket that is in contact with the casing can be pried lightly one word (the LCD glass cannot be pried directly to prevent the LCD from being damaged), and pries lightly more.

2. After opening, there is a "Z" key and an "S" key on the back of LCD. If the temperature display deviates from the actual temperature, only the "Z" key can be fine-tuned, and the "S" key cannot be adjusted casually.

3. The temperature adjustment must be based on the standard thermometer, which should be placed at a relatively constant temperature. After successful adjustment, it should be placed in a relatively constant temperature place for 8 hours, and the temperature deviation displayed by each thermometer is small (0.5% of the range value is normal deviation).

4. If the actual temperature is higher than the displayed temperature of the temperature indicator, turn the "Z" key clockwise for fine adjustment. The actual temperature is lower than the display temperature of the temperature indicator. Turn the "Z" key counterclockwise for fine adjustment. Do it.

5. The "S" key must be adjusted by the technical personnel of the manufacturer who use the debugging instrument, and other personnel are not allowed to use this key.