Re: Fw: [alfa] MarelliPlex & multimeters

["Gwynne W. Spencer" <gwynnes1@xxxxxxxxxxx>]

Prior to resetting the "zero" on the ohms scale, make sure that when the 
meter is off that the pointer is at zero. There usually is a small screw 
right over where the pointer pivots from. Use this screw to mechanically 
set it at zero. Then, when you do the electrical zero you should have a 
correct reading.

Gwynne Spencer

At 06:51 PM 10/3/2004 -0400, you wrote:
>----- 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 --
>>>to be removed from alfa, see /bin/digest-subs.cgi
>>>or email "unsubscribe alfa" to majordomo@domain.elided
>--
>to be removed from alfa, see /bin/digest-subs.cgi
>or email "unsubscribe alfa" to majordomo@domain.elided
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided