1. High voltage wireless phase detector is a precision instrument. Do not open it at will.
2. If it is not used for a long time, take out the collector battery.
3. Replace the battery at least once a year.
4. This product should be stored in a damp, high temperature and dusty environment.
5. Before the first use of insulating rod, withstand voltage test shall be carried out.
6. The insulating rod shall be subject to withstand voltage test once a year.