1. Turn multi-meter to Hz meter
2. Circle the cable to get the AC Hz with clamp meter. If use normal multi meter, insert Probe± to grid side breaker connect point（L and N）.
How to measure AC grid Frequency?
1. Turn multi-meter to Hz meter
2. Circle the cable to get the AC Hz with clamp meter. If use normal multi meter, insert Probe± to grid side breaker connect point（L and N）.
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