voltage and amperage testing

[slim j 10+ year member]

What settings to you set a DMM to test the voltage and amperage at the battery?

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[knukonceptz 10+ year member]

Amperage requires a special tool with your DMM and it has to have the ability to test for that. It is a clamp that goes around the wire.

Voltage - You want to set it for DC (line with a dashed line, not the ~ ) and set to 20 or 200 depending on what decimal place you want to read up to

 

[slim j 10+ year member]

thanks...

so is usally the same DMM needed to test amerage is able to test watts?

 

[knukonceptz 10+ year member]

Watts can be estimated using a DMM. This is done in AC ( ~ ) at the amplifer'sspeaker output. You take the voltage reading squared, divided by impedance (x^2 / Y Ohm) That would get you a rough peak estimate. An Oscope is a better way to test though as you can see if the signal is clipped