[DMCForum] Re: Measuring "Current"

["content22207" <brobertson@xxxxxxxxxxxx>]

Have used milliamp setting exactly one time -- to measure CURRENT
through dash switch in my rewired headlight circuit (something like 30
ma -- side & tail lights moved to a new relay). After setting car on
fire (internal bulb short. Different problem I know, but WAS caused by
guts melting...) wanted as little CURRENT passing through that thing
as possible.

I've found that ignition systems only need two measurements:
- Resistance across coil (no more than 1-2 ohms)
- Voltage into coil (at least 7-8 volts)
Usually check HT output by simply clipping timing light onto
distributor lead.

You have promised at least one rude activity at Pigeon Forge.

If my crappy ignition system carries me that far...

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote:
> Milliams are thousandths of an amp, and are used to measure current.
You 
> set the multimeter to Ohms to measure resistance, but it says Ohms on 
> the meter. You usually have to put your + probe into a different
port on 
> the meter to measure current.
> 
> Forget studying it for 3 years at university - this is basic physics I 
> did at school at the age of 14
> 
> P=IV : Power [Watts] = Current [A] x Voltage [V]
> V=IR :  Voltage = Current x Resistance [Ohms]
> 
> Rearrange to suit your calculation
> 
> I don't mean to be out and out rude, but consider a discussion at the 
> pub when a friend says something silly - what do you usually do? Laugh 
> and call him an idiot? Probably.
> 
> Martin
> 
> content22207 wrote:
> 
> >What I MEANT to say is my multimeters don't have a "current" setting
> >-- volts and ohms (and milliamps) only. Have to measure WITH A
> >MULTIMETER using voltage.
> >



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