[time-nuts] multimeter

[Ben Bradley]

I have a comment regarding "classic equipment." About 20 years ago I
got an HP 410B VTVM, was pleasantly surprised that it still appeared
to be within the stated accuracy, but was astounded to find the
short-circuit current (measured the current range on a modern DMM) on
the 1-ohm scale was 100mA. This is from memory from back then, so I
should double-check it, but it was still a lot.

This brings to mind the importance of knowing the ins and outs of
equipment, and that you may not want to, for example, check the
polarity of a sensitive transistor with this unit's resistance scale.

On Sun, Mar 24, 2019 at 12:11 PM William H. Fite <omniryx at gmail.com> wrote:
>
> Fluke is the yellow one. Agilent is the orange one. Both are excellent. You
> made a fine choice.
>
>
>
> On Sunday, March 24, 2019, Jim Palfreyman <jim77742 at gmail.com> wrote:
>
> > Hi All,
> >
> > Thanks so much everyone for your comments. I especially liked "get the
> > orange one". Because that's what I did get (I think it's orange - could be
> > yellow).
> >
> > I was deliberately vague (apologies) but I just wanted a broad response.
> > Which I got.
> >
> > I've settled on the Fluke 87V. It's on it's way.
> >
> > Jim
> >
> >
> > On Sun, 24 Mar 2019 at 12:00, Bob Albert via time-nuts <
> > time-nuts at lists.febo.com> wrote:
> >
> > >  I have a cheap Chinese clamp-on power line ammeter I use occasionally.
> > > Its lowest range is 20 A I think but I built a 10:1 expander (very
> > > simple).  I also built a line separator so I can grip just one line.
> > > Bob
> > >     On Saturday, March 23, 2019, 5:00:23 PM PDT, Jim Harman <
> > > j99harman at gmail.com> wrote:
> > >
> > >  jim77742 at gmail.com said:
> > > > I think I'm in the market for a new digital multimeter.
> > > > Could I have some recommendations?
> > >
> > > >
> > > > It all depends on whether you are checking for a bad power supply or
> > > testing the linearity of a 24 bit DAC.
> > >
> > > For the former, I find a built-in clamp type AC/DC ammeter with a
> > > reasonably sensitive range (40 A or less) is very handy. My current
> > > favorite is the Mastech MS2108, from Amazon.
> > >
> > > -Jim Harman
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>
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