Wow, that almost sounds dangerous, nano != multimeter. I hope you are atleast using a X10 probe for your higher voltages multimeter adventures. Thats the thing with multimeters, you can plug them in almost everywhere without worries, most works with all voltages up to 1000 volts or so and any serious multimeter have all kinds of protective things that should protect you no mather how wrong you are using it, it blow up and hurt you etc. A oscilloscope you don’t plug in unless you atleast know what voltage range you are supposed to be in. My multimeter I would never substitute with my nano.
Be careful!