1. Weights should be stored properly and not placed in damp or dusty environments.
2. Count the weights in the box once before and after use to prevent loss.
3. Do not handle weights with bare hands; use tools to remove weights when in use.
4. Before use, remove any dust from the surface of the weights with a soft-bristled brush or a wiping cloth.
5. Before being weighed on the balance, all weights must be brought to a constant temperature to match the laboratory's atmospheric conditions.
6. Handle weights with gentle care when picking up or placing them.
7. Avoid sticking on acids, alkalis, greases, and oils during use.
8. This set of weights must not be mixed with other weights.
9. After use, clean the weights with alcohol and let them air dry before storing them in their original packaging box for future use.
10. Weights should be periodically calibrated based on usage frequency, and calibration records should be kept.
11. If you have any doubts about the performance of the weights, they should be immediately sent to a regular institution for testing.