Mearini glucometer

I have type II diabetes.Every morning, before breakfast, I control the glucose.I always have it low, less than 110, almost always, and sometimes less than 100. But yesterday I measured the Menarini Glucometer [Glucomen (Areo 2 K).I have always used the Onetouch Vario.Well, all measurements made with the first of them have given me much higher, greater than 140: values ​​that I have never reached and that the glucosilada denies.
I have Duida, then, if Menarini's glucometer will have it badly configured, don't I know what the problem can be?Yesterday I bought another accoury glucometer and the figures coincide with those of the One Touch.
You have some explanation!
Greetings

The glucometers can have up to 15% error.It is better to check it with a measure at the time of getting an analytical