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  • Switching Power Supply question

    From Kevin Glover@21:1/5 to All on Wed Jul 27 10:14:18 2016
    Just recieved a Mean Well quad output power supply. After powering it
    up and testing output I get drastic flucuations on all outputs, a
    ticking sound and the green indicator light flashing. I have input
    power properly set to 120V. Does this need to be tested under load? Or
    is the thing possibly defective?

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  • From JW@21:1/5 to All on Wed Jul 27 13:48:55 2016
    On Wed, 27 Jul 2016 10:14:18 -0700 Kevin Glover <kevinfglover@yahoo.com>
    wrote in Message id: <1uqhpb1gevr3601pj7cid4od94k7bdeeq8@4ax.com>:

    Just recieved a Mean Well quad output power supply. After powering it
    up and testing output I get drastic flucuations on all outputs, a
    ticking sound and the green indicator light flashing. I have input
    power properly set to 120V. Does this need to be tested under load? Or
    is the thing possibly defective?

    Model # might be helpful...

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From doh@yipee.com@21:1/5 to none@dev.null on Wed Jul 27 15:28:39 2016
    On Wed, 27 Jul 2016 13:48:55 -0400, JW <none@dev.null> wrote:

    On Wed, 27 Jul 2016 10:14:18 -0700 Kevin Glover <kevinfglover@yahoo.com> >wrote in Message id: <1uqhpb1gevr3601pj7cid4od94k7bdeeq8@4ax.com>:

    Just recieved a Mean Well quad output power supply. After powering it
    up and testing output I get drastic flucuations on all outputs, a
    ticking sound and the green indicator light flashing. I have input
    power properly set to 120V. Does this need to be tested under load? Or
    is the thing possibly defective?

    Model # might be helpful...

    Model RQ-125D

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  • From JW@21:1/5 to doh@yipee.com on Thu Jul 28 05:17:38 2016
    On Wed, 27 Jul 2016 15:28:39 -0700 doh@yipee.com wrote in Message id: <5cdipbdctn701mrni98c6bsjclo5mljk8h@4ax.com>:

    On Wed, 27 Jul 2016 13:48:55 -0400, JW <none@dev.null> wrote:

    On Wed, 27 Jul 2016 10:14:18 -0700 Kevin Glover <kevinfglover@yahoo.com> >>wrote in Message id: <1uqhpb1gevr3601pj7cid4od94k7bdeeq8@4ax.com>:

    Just recieved a Mean Well quad output power supply. After powering it
    up and testing output I get drastic flucuations on all outputs, a
    ticking sound and the green indicator light flashing. I have input
    power properly set to 120V. Does this need to be tested under load? Or
    is the thing possibly defective?

    Model # might be helpful...

    Model RQ-125D

    OK, have a look at page one of the datasheet www.meanwell.com/mw_search/RQ-125/RQ-125-spec.pdf
    The current range is listed. Those show the rated minimum load for each
    output in order for the outputs to be guaranteed in specification. They
    may be fine with less or none at all which you'd need to test with a DMM.

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