1. According to the cleanliness of the environment, periodically (the initial filter is usually 1-6 months) replacement.
2. Dust particle counter is used periodically (usually every two months) to measure the cleanliness of the cleanliness area purified with this product. When the measured cleanliness is not in conformity with the required cleanliness, the reason (whether there is leakage, whether the efficiency is invalid, etc.) should be found out. If the high-efficiency filter has failed, a new high-efficiency filter should be replaced.
3. When replacing the primary effect filter, the machine should be stopped.