IT7963EP-350-315 350 V 315 A 63 kVA 0.01V/0.01A <0.1%+0.1%FS /<0.1%+0.2%FS USB/CAN/LAN/数字I/O口,选配GPIB/模拟量&RS232 15U IT7984EP-350-420 350 V 420 A 84 kVA 0.01V/0.01A <0.1%+0.1%FS /<0.1%+0.2%FS USB/CAN/LAN/数字I/O口,选配GPIB/模拟量&RS232 27U IT79105EP-...