... for 1min when testing.II. Insulation ResistanceBetween meter circuit and meter shell, between the two voltage input ... f) Amplitude range of measured signal when measuring phase,100~220V,0.5A~1.5A(g) External ... signal when measuring phase, Phase U1-U2, 30V~500V Phase I1-I2, 10mA~10.00A Phase U1-I2 or ... Rate, 3 times per secondIII. Power Supply, Single 9V laminated cell,current of power is less than ...