Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] ceramic fuses



Yes. with a name like Fluke, it's gotta be good.
I think I tried some other less expensive meters (other than Exetch) ,
and they didn't have the problem.
I am not sure, but I might have been a good boy and written this all down.
If I did, I have my notes at home because that's where I worked on
this problem. (No sense commuting 45 minutes each way when I am
working on a problem where the equipment can be easily carried home.)


On Mon, Aug 20, 2012 at 12:41 PM, Chuck Britton <cvbritton@mac.com> wrote:
Fluke is a brand that can always be trusted.
(With a name like that - ya GOTTA be good ! ! !)

Extech is cheaper, I'll wager. (and for a reason!!!)

On Aug 20, 2012, at 12:32 PM, George M Caplan wrote:

I am pretty sure that the problem with the Extech meter was that the
fuse was rated very close to the maximum displayable current. And as
the fuse got warm, its resistance changed. The resistance of the meter
*definitely* changed significantly with current (on the same scale!).
This did not happen with a Fluke meter that I tried.

Regarding my discussion, the meter manufacturer never explained the
problem I was seeing.

_______________________________________________
Forum for Physics Educators
Phys-l@phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l



--
George M. Caplan
Senior Instructor in Physics Laboratory
Wellesley College
106 Central Street
Wellesley, MA 02481-8203
USA