Cen tech meter

Discussion in 'Electronic Repair' started by Mike Muderick, Jan 18, 2004.

  1. I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
    seems to be quite functional but does have a variance when compared with an
    older Radio Shack DMM
    e.g.
    35VAC vs. 36VAC on one measurment
    117 vs. 122 on another
    ..6 volt difference on measuring a 9 volt battery.

    1. Does anyone have an instruction sheet they can fax /mail me?
    2. There is an adjustment pot inside- is there a way to calibrate it or
    should I just leave it as-is?

    Thanks- email response would be helpful
    Michael Muderick
     
    Mike Muderick, Jan 18, 2004
    #1
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  2. Mike,
    That meter is sold by Horbor Freight. See the link below.

    http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=30756

    --
    Tony Marsillo
    Nutmeg Repair
    -----------------------------------------------------------------
    "Mike Muderick" <> wrote in message
    news:7vEOb.3950$...
    > I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
    > seems to be quite functional but does have a variance when compared with

    an
    > older Radio Shack DMM
    > e.g.
    > 35VAC vs. 36VAC on one measurment
    > 117 vs. 122 on another
    > .6 volt difference on measuring a 9 volt battery.
    >
    > 1. Does anyone have an instruction sheet they can fax /mail me?
    > 2. There is an adjustment pot inside- is there a way to calibrate it or
    > should I just leave it as-is?
    >
    > Thanks- email response would be helpful
    > Michael Muderick
    >
    >
    >
     
    Tony Marsillo, Jan 19, 2004
    #2
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  3. Mike Muderick

    Chris Oates Guest

    "Mike Muderick" <> wrote in message
    news:7vEOb.3950$...
    > I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
    > seems to be quite functional but does have a variance when compared with

    an
    > older Radio Shack DMM
    > e.g.
    > 35VAC vs. 36VAC on one measurment
    > 117 vs. 122 on another
    > .6 volt difference on measuring a 9 volt battery.
    >
    > 1. Does anyone have an instruction sheet they can fax /mail me?
    > 2. There is an adjustment pot inside- is there a way to calibrate it or
    > should I just leave it as-is?
    >

    don't think I'd be trusting a $2.99 meter
    to tell the truth about anything
    http://tinyurl.com/2ryce
     
    Chris Oates, Jan 19, 2004
    #3
  4. Mike Muderick

    JURB6006 Guest

    That's a very cheap meter, I got one but I only use it for quickie
    continuity/diode type checks. Be happy it is as accurate as it is, know it's
    limitations. For accurate measurements I use a Fluke.

    I wouldn't try to calibrate it or anything, just use it and if you drop it or
    spill acetone in it, laugh and shell out $3-$6 for another one. I save my $300
    Fluke for when I need it.

    JURB
     
    JURB6006, Jan 19, 2004
    #4
    1. Advertising

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