OBSERVATIONS ABOUT THE ELEMENTS Two primary functions Extract data Present data Two points of intended contact with the"outside world Functional blocks Can have more than one of each type Not all measurement systems have all functions May be in any sequence(except primary sensing and data presentation)OBSERVATIONS ABOUT THE ELEMENTS • Two primary functions – Extract data – Present data • Two points of intended contact with the “outside world” • Functional blocks – Can have more than one of each type – Not all measurement systems have all functions – May be in any sequence (except primary sensing and data presentation) 8