On Thu, Jul 13, 2017, at 03:48 PM, Nicklas Karlsson wrote:
> Fluke work great but are a little bit expensive. Unless accuracy is important 
> I guess any would do.

Fluke is indeed expensive.  However, I would change the last part to "Unless 
_safety_ is important I guess any would do".

Cheap imported meters are often as accurate as brand-name meters costing 5-10 
times as much.  But one of the differences is the input protection.  What 
happens if you accidently hook your meter probes across line voltage when it is 
set to measure current?

Most meters, even cheap ones, have a fuse that will blow in that case.  If you 
accidentally tried to measure a 24V power supply or even a 120V AC line while 
set for current, you'll probably be fine.  If you accidentally tried to measure 
a 480V line with a Fluke, you'll still be fine - the fuse in a Fluke is rated 
600V and has a high interrupting current rating.  But the fuse in a cheap 
knock-off meter can't interrupt 480V fault current and is likely to explode in 
your hand trying.

I have a Fluke and a cheap meter.  On the bench when I'm working with low 
voltage I'll use whichever one is handy.  Both are accurate, and the cheap one 
actually has a few features that are nicer then my (older) Fluke.

But for anything higher than 120V, I only use the Fluke.


-- 
  John Kasunich
  jmkasun...@fastmail.fm

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