not sure if this is the rite place to post but here goes,ive 3 scopes,one is a tek 453,also a kenwood dso and an old heath computer dso,on all 3 when i touch the probe tip with my finger i get a trace that measures about 200volts,it does this on all 3 scopes!,its still the same with a 10x probe on 10x or 1x,is that sort of reading normal,or is my house wiring iffy?,cheers m3vuv.