IT8512BIT8512C0~500V0~120V1mA~15A1mA~60A300W300W精度解析度精度解析度 (0.05%+0.02%FS)1mV (0.05%+0.02%FS)1mV (0.05%+0.025%FS)10mV (0.05%+0.025%FS)10mV (0.05%+0.1%FS)0.1mA (0.1%+0.1%FS)0.1mA (0.1%+0.1%FS)1mA (0.15%+0.2%FS)1mA (0.05%+0.02%FS)1mV (0.05%+0.02%FS)1mV (0.05%+0.025%FS)10mV (0.05%+0.025%FS)10mV