In article ,
budgie wrote:

On Mon, 18 Dec 2006 07:03:19 -0000, "Ken chattenton"
wrote:

Hi from Ken,

"William Pence" wrote in message
...
In article Bephh.212$pr5.108@trnddc01, "west"
wrote:

I have a 40 amp, 13.8v supply and would like to add a voltage (0-15v)
meter
and an amp (0-50amp) meter. Cordially,
west

yep. the amp meter will definitely need a shunt. that value is dependent
on the actual coil current for full scale.

the voltmeter can just wire directly across the output voltage
terminals, but the ammeter will require a shunt.

If the volt meter is not already calibrated it will require a resistor in
series with the positive lead.

or the negative lead

that is entirely possible. in general, I have seen voltmeters that are
already cal'd with this resistor internal...
this might have been special case (s). it has been a while.