A: On some Rak283 models, E5 means the pressure sensor failed. Turn off, wait 10 seconds, and retry. If repeated, the monitor needs servicing.
The is a fully automatic, upper-arm device designed for accurate home health tracking . Utilizing oscillometric detection, it provides precise readings for systolic pressure, diastolic pressure, and pulse rate. Key Features & Specifications Rak283 Blood Pressure Monitor User Manual