Quote:
Strain Gage Load Cell...tiny bend changes the electrical characteristics of the strain gage
producing a very small change in its output...amplify this signal up to a measurable level then
convert it from an analog to digital value that the computer inside your scale can read and convert
to a weight.
If the computer displayed the actual readings it was receiving from the load cell you would find
the scale all but unusable. There are two reasons for this; first of all, because of the speed that this
electronic stuff whirls around, the scale picks up every little vibration and puff of wind in the room
and instantly amplifies it. Secondly, in the great scheme of things, a tenth of a grain, one seventy
thousandth of a pound, is a real small thing to pin down and measure.
The computer in your scale acts as a filter deciding, in fractions of a second, whether or not to
allow a given reading onto the display...The goal is to provide a display that is
both very stable when the weight is stable, yet changes very quickly when the weight changes, all
the while filtering out wind and repetitive vibrations.