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Bobcat 225G reading high Mz

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  • Bobcat 225G reading high Mz

    I am looking at a older bobcat 225G welds good, meter shows 120v on run but 700 Mz. I have a cheep meter but it reads 60 Hz on my house . Is it even possible for welder to read 7 or 800 Mz. If so what could be wrong with the welder. Thanks

  • #2
    Got a serial number on this cat?

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    • #3
      It is a ke which should be a 1994

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      • #4
        Your cheap meter apparently has no low-pass filter on the input, and is picking up noise spikes from the generator. Get a .01 mfd 600 volt capacitor and clip it between your meter leads with alligator clip leads. Don't get zapped! Then measure again. I'm sure you'll read something much closer to 60 Hz. And I would also check your brushes for arcing-I wouldn't be surprised to see some fireworks in there. Be sure brushes slide freely and brushes and slip rings are clean. And maybe look for a better meter if you use it much. Most meters should roll off frequency sensitivity at about 100 kHz or so, not MHz!

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        • #5
          Originally posted by Usjdman View Post
          ... meter shows 120v on run but 700 Mz. I have a cheep meter but it reads 60 Hz on my house . Is it even possible for welder to read 7 or 800 Mz. ...
          Is Mz supposed to be Hz or MHz?

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          • #6
            Agreed. It surely is the cheap meter.

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            • #7
              Originally posted by MAC702 View Post

              Is Mz supposed to be Hz or MHz?
              So...the engine runs at 36,000 rpms?

              Or 36 million rpms?

              That's got to wear out the oil in a hurry!

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              • #8
                But imagine how fat your grinder will run.

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