Winston wrote:

PrecisionmachinisT wrote:

My old Triplet 630 seems to work just fine for this and since the "B"
cell only needs replacement about once every 30 years......

That's peachy for getting a 'ballpark' idea and probably quite sufficient
for most motor servicing without the need of a Kelvin connection.

When you *do* need much better precision and accuracy, a Kelvin
connection with a good digital meter is hard to beat. In a previous
lifetime, I was able to estimate current flow in a very low impedance
application by using a measured PCB trace as my current shunt. 'Worked a
treat.


The company name is Triplett, not Triplet: http://www.triplett.com

I've used a fixed current into a shorted trace, and a 4.5 digit DVM
to locate the short. Let's see him do that with an analog meter like
that Triplett, when the voltage change was a couple hundredths of a volt
from one point to the next.

They were OK meters in tube type radio & TV repair, 50 years ago.
The 630 was usually the meter pictured in early solid state repair
manuals ('60s) telling you not to use, to keep from destroying
transistors & signal diodes.