A voltammeter is a device for measuring voltage or amperage.伏安计是用于测量电压和安培数的仪器.Attention: use thicker cable as amperage is 19 - times ( 19 x ) higher.注意: 尽量用加粗的电缆,因为安培数有19倍之高.Calculates by any two of wattage, voltage, amp...