Hi,
I'm planning to buy a new dmm and the Keithley DMM6500 looks perfect. When I read the datasheet it tells about a 16 bit ADC used in the scanning mode. An 16 bit ADC is not accurate enough to achieve a 6 1/2 digit readout. So how does this dmm work?
I asked at tek and the local distributor answered by sending the datasheet and not explaining at all. So how does it work? A dual slope ADC next to the faster ADC for fast scanning or only the ADC and some math interpolation trick?