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Info Req: Power Quality Monitoring from a PC?

Discussion in 'Hobby Electronics' started by Glenn, Jan 29, 2005.

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  1. Glenn

    Glenn Guest

    I am looking for a means of monitoring/logging the 240v single phase
    power quality in my home. I live in an area in Sth East Qld where we
    have frequent power disturbances.

    Does anyone know of a kit (preferably) or domestic quality (price) test
    equipment that plugs into a power point to sample the power available,
    and has a serial or USB interface and PC software to (a) display power
    quality in real time on the PC monitor, and (b) log the data over a
    nominated time period.

    I have seen a range of industrial test gear for this purpose (Fluke 43
    handheld etc), but I am seeking more of a permanent installation rather
    than ad-hoc testing.

    This is partly for information/education, but also as supporting
    evidence for any claim against the power company for equipment damage
    resulting from power quality issues. I suppose this is a bit like
    checking the weather forecast - not much you can do about it but good
    to know anyway....

    I see that some UPS manufacturers (OPTI for example) include this
    facility in their products, including the on-screen display, but
    probably minus the data logging facility.

  2. Phil Allison

    Phil Allison Guest


    ** No chance of you being more specific about "disturbances" is there ???

    I mean "brownouts " and loss of all power are one thing - but the effects
    of lightning hits is another.

    ** Kindly define "power quality " ??

    Is voltage variation the issue or is it bad waveform or missing cycles or
    transient spikes etc ??

    ** Have you got a Masters in the "Use of Vague Language to Confound a
    Query " ?

    A PhD even.

    ** One problem with personally monitoring the AC supply in * your * home
    is that is has no legal status - any problems recorded in your
    accumulated data could be a result of faults in your own test gear or the
    house's own wiring.

    ** Are you under some legal compulsion to never, ever be specific ??

    Like an ASO or " Anti Specific Order" from a court ??

    ............. Phil
  3. Mr.T

    Mr.T Guest

    LOL, this from a man who denies the concept of legal traceability in
    calibration standards!


    (stands back and waits for the inevitable abuse, the concept of irony going
    straight over Phil's head :)
  4. Phil Allison

    Phil Allison Guest


    ** No post from me exists saying that.

    MrT. = a criminal ****.

    ............... Phil
  5. Mr.T

    Mr.T Guest

    Pity Google says otherwise eh?

    And yes I know you always say that just to make the other person look it up.
    When they can't be bothered you claim a victory.
    Unfortunately for you, you have said it so many times I doubt there is
    anyone, besides yourself, who does not remember :)

  6. Phil Allison

    Phil Allison Guest


    ** Pity Google says you are a life long turd burglar.

    * Mr. T - its guaranteed, not a single soul here doubts that you are
    a turd burgling POS.

    ................ Phil
  7. JDH

    JDH Guest

    Maybe you should neasure it from your consumers mains ie. point of
    connection to the switchboard rather than from a GPO through your internal
    wiring. I think Jaycar and Dick Smith sell a fairly cheap multimeter with an
    RS232 interface to allow you to log data to a PC. This might be an option.

    Has the poor power quality only recently got worse? maybe you another
    resident has installed a large reverse cyle aircon in your street, large
    pump etc. Also in rural area the power utilities sometimes install
    regulators on long 11kV rural feeders to improve volts, maybe they need to
    revise the float and LDC settings or change the tap setting on the pole
    substation that feeds the LV in your area.



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