I've watched a few multimeter teardowns and there don't seem to be a ton of components between, say, a voltage coming in and the ADC.
Anyone know how they make the most of a signal?
For example, Flukes seem to provide 4 numbers a second (display refreshes).
That leaves 250ms to capture a bunch of data and post-process it.
What electronic filtering?
How many samples? Like 100, 1000...?
How many bits the ADC? Couldn't find this anywhere.
What sorts of mathematical operation on the collected data?
Have messed about measuring voltages with a microcontroller and would like to know how the pros do it.