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  1. #1

    Exclamation Millermatic 350P How to get an accurate amperage reading?

    Can anyone explain how to get an accurate amperage reading off a new Millermatic 350P? We've put an amprobe around the lead while the welder is welding, we've used volt/amp meter at the terminals and same issue. We're getting readings from 20-50 amps and we know that just isn't the case. Are there some sort of power factors or multipliers we are supposed to be using? For FCAW we should be somewhere in the neighborhood of 200-230A at least. ?? Any suggestions on what we're doing wrong?

  2. #2
    Join Date
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    You can just use the 350p

    "AMPS illuminates indicating welding amps appears in the display, instead of wire speed, during welding and for 5 seconds after the arc is extinguished."

    http://www.millerwelds.com/om/o1327ah_mil.pdf

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  3. #3
    Join Date
    Jan 2012
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    Appleton, Wisconsin U.S.A.
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    Quote Originally Posted by Grimes Industrial, Inc. View Post
    Can anyone explain how to get an accurate amperage reading off a new Millermatic 350P? We've put an amprobe around the lead while the welder is welding, we've used volt/amp meter at the terminals and same issue. We're getting readings from 20-50 amps and we know that just isn't the case. Are there some sort of power factors or multipliers we are supposed to be using? For FCAW we should be somewhere in the neighborhood of 200-230A at least. ?? Any suggestions on what we're doing wrong?
    The machine is sent from the factory to display voltage and wirefeed speed while welding, but the operator can set the machine up to display volts and amperage. Following are the steps to do this.

    -Push the setup number on the right side of the front panel until the timer light is on.
    -Rotate the left control knob until the left meter reads DISP (Short for Display)
    -Rotate the right control knob until the right meter reads AMPS

    -Push setup button to return meters back to weld mode.

    The next time you make a weld the right meter will display the average welding amperage and will hold that display for 5 seconds after the weld has stopped.

    Let us know if you have any other questions!

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