1. When using, do not pinch it with your hands, but only use tweezers or wear gloves to take it;
2. Do not touch corrosive substances.
3. Strictly prevent collision or falling and avoid bumping or scratching.
4. When using weights, it should be "big first and then small". For example, weigh an article of about 35g, and then estimate, take 50g weight first. If it deviates to the right, remove the weight and replace it with 20g weight,
If the pointer deviates to the left, add 10g weight. If the pointer still deviates to the left, add 5g weight. In this way, until the mass is measured.
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