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We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.

What are specs for volt meter that's fast enough to read our alternator DC volts

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I need to buy a better volt meter because my alternator is going out and I want t measure AC voltage on the replacement before leaving the store.  I don't want to spend the money on a Fluke and am looking at an innova 3340. Will this work?

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I have the 3320. Works well for AC noise. Only like $40

  • Owner

As long as the meter can read variable frequency AC as well as AC voltage in the millivolt range. Typically a good alternator is 10 to 30 mV AC 

 

Marginal is 50 to 90 mV AC. (This range is hard to define some truck have issues as low as 50 mV and some tolerate as high as 90 mV rather well depends on mods and accessories.)

 

Fail is 100 mV AC.

Edited by Mopar1973Man

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.