SIM928 Isolated Voltage Source is applicable for different applications that requires ultra-clean DC. Its voltage can be set between plusmn;20 VDC and has a millivolt resolution, while the source can be driven up to plusmn;10 mA. The SIM928 has two independent rechargeable batteries made of nickel, both of them can provide 12 hours of operation when they are fully charged.sim928离电压源用于不同的应用净直流。它的电压可定在±20伏具有毫伏的分率源可动多±10 Ma。sim928有两个独立的充电电池由他们可以提供12小时的操作当他们完全充电。