Square instrument Power factor meter (for balanced circuits) Transducer type Width (mm): 122 Depth (mm): 119 Height (mm): 122 Principle of operation: Transducer type Class class (class): 5 Frequency (Hz): 50 or 60 Trial length (mm): 100 封面符号:B(黑色封面) 试验:LEAD0.5-1-0.5LAG