Good read fellas, lots here i didnt realize
I did QA work for a machine shop a couple years back (we actually had an old Heenan and Froude water brake dyno for our marine engine testing/calibration) and our mics / measuring equipment /manufactured parts were calibrated and kept in temp controlled environment as per ISO regs., so that (as yellow rose stated) the repeatability/reliability of the measurements were maintained to a small percentile.
my point is cant a dyno be calibrated for repeatability and wouldnt an owner want the equipment to be accurate? just wondering?
We calibrate everything in our current shop that does a quantative measurement - mics, surface finish testers, verniers, precision levels, electronic dials, weight dyno scales , precision squares, etc.
most pieces of precision measuring gear are calibrated or set to a known standard, micrometers, surface testers are first run over a known piece of surface finish to calibrate, electronic levels calibrated on a flat surface before use, hardness testers on a known rockwell hardness, blah blah
anyway isnt there a known resistance or baseline that an engine dyno would be first 'setup' to or calibrated to before an engine pull?
