"Harry Bloomfield" wrote in message
. uk...
on 09/03/2015, Dave Plowman (News) supposed :
The OP mentioned Fluke. My Fluke does. And that gives a far more accurate
min/max than trying to read a waggling needle.

For leaving across the mains and logging its worst excurions in voltage
they are perfect, for everything else a proper analogue meter works best.

Its just as useful for logging the worst excursions
with a power supply or anything else that varys.