Safety alarm system Airway pressure alarm upper limit setting range 0.3~6.0 kPa lower limit setting range 0.2~5.0 kPa Per-minute ventilation volume alarm upper limit setting range 3.0~30L/min lower limit setting range 1.0~10L/min Vt alarm upper limit setting range 10~2000ml lower limit setting range 0~1800 ml Sustained high-pressure alarm it will give alarm when stress have consistently been higher than 2.5 kPa Suffocation alarm it will give sound and light alarm if there is no tidal volume input for 15 seconds Power failure alarm Power AC 220V±10% 50Hz±1Hz UPS, Storage battery Battery under-voltage alarm Power loss alarm Intubation off alarm Heated humidifier