KC, low readings happened to be Gnd planes and measurements were taken just seconds apart like you would when in normal use. No plan and only poked at a few pads and when it beeped moved on to another one.
Thought I'd mention that the hold function works very nicely for me, but I do have one significant complaint about it: the main value display needs to show the measured value for some minimum amount of time, like 5 seconds or something, so that you can take a measurement, hear the beep, and then look up and see what it measured. It would probably be best for this minimum time to be something the user can set.
Right now it doesn't do that, and there's no good reason for it to not do so, because it already shows the live value (in small font) as a separate thing.
Obviously, if a new measurement comes in before the expiration time, it would beep and replace the shown value with the new measurement (or you could make that something the user could disable, thus making it possible for the user to specify the minimum amount of time between measurements).
It's been very nice to use other than that.