... after silenced), pressure sensor failure, capacity of battery nearly empty, capacity of battery exhausted, main cable unconnected, AC power failure. ... weight, solution volume, drug volume, concentration, event log, syringe brand, battery capacity indicate, local time, flow rate, system pressure etc.l ... Power: AC220V±22V,50HZ±1HZ Internal battery: DC12V, can work for approx. 3.8h at 5ml ...