hi I have a Omron Hem-711dlx, i bought a couple of years ago, the readings on it are wrong, i just gor back from my doctors,, the Omron was showing sys 149 dia 95- puls 95, when the doctor used his machine it showed sys117 dia 79 puls 80, is ther a master rest so i can reset it, I also already have 3 cuff, tryied changing the it does not seem to be the problem, also on ac or dc same problem, how do I reset it