19-08-2017, 10:14 PM
Glad you're pleased with it 
I gave up trying to measuring the input impedance in mV range - with the AN8002 (and the AN860B+) I estimated 20GΩ, but the AN8008 was even higher. I was using a 33M resistor. Funnily enough, I tried the same test with the Uni-T UT61E earlier today, and the voltage doesn't change at all! Once upon a time, such high input impedances were the preserve of bench multimeters - it's really quite remarkable what you can get today.
There's a couple more points to add to the reviews - hopefully I'll update them next week.
I gave up trying to measuring the input impedance in mV range - with the AN8002 (and the AN860B+) I estimated 20GΩ, but the AN8008 was even higher. I was using a 33M resistor. Funnily enough, I tried the same test with the Uni-T UT61E earlier today, and the voltage doesn't change at all! Once upon a time, such high input impedances were the preserve of bench multimeters - it's really quite remarkable what you can get today.
There's a couple more points to add to the reviews - hopefully I'll update them next week.
