A.±7% B.±5% C.±5%~±7% D.±7%~±10%
A.±0.7Hz B.±0.5Hz C.±0.2Hz~±0.5Hz D.±0.1Hz~±0.7Hz
A.三級負荷 B.二級負荷 C.一級負荷 D.特級負荷