You must be careful about the following: At least thirty minutes prior measuring, avoid drinking coffee, having lunch, and smoking. Prior measuring, remain seated for approx. 5 minutes. Support your back at the chair’s back, while easing your arm on a stable surface (e.g. table). Your feet must touch the ground (do not cross them). Properly place the cuff directly on the arm (not above the sleeve), approx. at heart level and 2-3 cm above the elbow. If your sleeve is too tight, you must remove it. Press the ON button of the pressure meter. Breathe normally but do not talk and do not move your arm until the end of the measurements.