Model unit A, B, C, D, E, F, G SF-52: 58, 66. ... SF-65: 73.5, 83.5, 4.5 Model unit A, B, C, D, E, F, G SF-52: 58, 66 ... and the different apparatus to measure the DC current,voltage AC current, voltage, frequency, power and reactive power, power factor,synchroscope ... indicator and the other non-electric value. SF-62T2 Round Panel Meter