Fw: [alfa] MarelliPlex & multimeters

["Bill LeClair" <billleclair@xxxxxxxxxxx>]

----- Original Message ----- 
From: "Bill LeClair" <billleclair@domain.elided>
To: "alfacybersite" <acs@domain.elided>
Sent: Sunday, October 03, 2004 5:41 PM
Subject: Re: [alfa] MarelliPlex & multimeters



> On an analog ohm meter you need to zero the meter when you switch scales, 
> to do this select the scale you need, then touch the red and the black 
> probe together, and then rotate the zero knob/dial until the meter points 
> to the zero. You should then be good to go. You will need to re-zero the 
> meter when you switch scales.
>
> Do this every time you need to use the ohm portion of the meter.
>
> Bill LeClair
>
>
> ----- Original Message ----- 
> From: "alfacybersite" <acs@domain.elided>
> To: "AD" <alfa-digest@domain.elided>
> Sent: Sunday, October 03, 2004 3:26 PM
> Subject: [alfa] MarelliPlex & multimeters
>
>
>
> > Frank Smith was kind enough to forward me Centerline's test procedure for 
> > the control module. Essentially the test is to eliminate any of the other 
> > items in the "system" leaving only the control module as the guilty party 
> > if all tests out. Or if you prefer - process of elimination.
> >
> > Everything has tested out except...the resistance between the + and - on 
> > the coil which is supposed to be .69 to .75 ohms. I get a wee bit over 2 
> > ohms on both my Alfetta and "other" MarelliPlex coil. I'm concerned the 
> > error might well be in my ancient Radio Shack analog multitester. It only 
> > goes to 0 which is logically at the end of the ohm dial. Had it gone past 
> > 0 I would have surmised all was okay. However, when testing the ohms 
> > between the coil's center "socket' and either the + or the - it should 
> > read between 7100 and 8700 ohms. Testing with the dial set on RX1k, I get 
> > 6200 ohms on both coils. However, after retesting with it set on RX100 
> > (and with needle close to the center) I now get 8200 ohms on both.
> >
> > I'm thinking it is time to invest / go modern with an electronic 
> > multimeter for more accuracy. About 99% of the times I use my multitester 
> > is to see if a bulb is burned out or it isn't getting electricity (volts 
> > of course), or if one end of a wire belongs to another end (ohms).
> >
> > I've always heard that coils virtually last forever unless something 
> > major causes them to fail. It occurs to me that both coils "could" have 
> > degraded the same over the years, but rather doubt the coincidence.
> >
> > What nice, bulletproof, accurate, multimeter do youse guys recommend? I 
> > have a catalog from the ToolWarehouse.net which lists several from 
> > $439.75 (automotive specific Ferret) to $36.50 (ES). I prefer the latter 
> > price, but am realistic.
> >
> > I rather liked the specs of the ES Deluxe Auto-ranging Digital Multimeter 
> > with RPM & Temperature @ $79.25.
> >
> > Biba
> > Irwindale, CA USA --
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