Has since taken care of panic

However, I had a very strange malfunction. It started to use about 2 months, always continuous display steigendere values. There was no error message, even once the batteries had changed. It just showed always a few points more in the measurement result, just enough that it certainly seemed plausible.

A few days of daily measurements, I then was at levels around 120: 90! The visit to the doctor then took the facilitating surprise: My values ​​were still completely in the normal range.

Have the batteries removed overnight and lo and behold, the next day I again get correct values. This is a perfidious, almost dangerous type of error. Dear it should show nothing but false but plausible readings.

This phenomenon has now occurred once, the weeks after that it worked reliably again. I'll keep it in mind, of course. Actually, the device is in fact good, the service is comfortable, etc. But it must first earn back trust.