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Raed pwm amps Acuretly
When using PWM:How do you monitor the current draw if standard automotive gauge wil not be capable to echo Correctly pulsed amps?
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You need a setup like this if you are going to monitor amperage.
http://www.extremehho.com
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The meter as shown in the link above will measure average current just like an automotive guage.
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an amp meter connected to the positive wire should work
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If you want to measure peak current, You'll need an oscilloscope connected to a meter shunt installed in the high current path. Find the peak voltage on the o-scope and devide it by the resistance value of the meter shunt. That will give you peak current.
You can also short around the pwm momentairly, and measure with a standard ammeter. This reading will be slightly high because it doesn't take into account the resistance of the pwm, but it should be close.
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