... locked through digital feedback, magnetic induction lock precision 0.5%.·Power source and sampling amplifier integrated into a casing with simple ... voltage alarm connected to high speed A/D card. ·Different power sources can be selected according to different test requirements: 1 kHz ... as μa, δ, Pc, Br and Hc, and calculate μ', μ'', μL, μR, Q and AL, etc. ·Automatic and continuous measurement up to 255 ...