I was looking at some fob watches in the middle of the night, because I think lapel watches for nurses are so great. Anyway, I came across some with a "base 30 pulsations" along the rim of the watch. Can anyone explain to me how you use this dial for calculation of the HR?
I was looking at some fob watches in the middle of the night, because I think lapel watches for nurses are so great. Anyway, I came across some with a "base 30 pulsations" along the rim of the watch. Can anyone explain to me how you use this dial for calculation of the HR?