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Extech AC/DC Clamp Meter Offset

Discussion in 'Electronic Repair' started by Samuel M. Goldwasser, Sep 19, 2009.

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  1. I have an Extech 380652 that seems to work well in general but has
    an approximately 0.06 A offset in the AC Amps mode on the 20 A range.

    The user offset adjust pot only works on DC Amps.

    Does anyone know if any of the 3 pots inside are for the AC amps offset?

    Thanks!

    --
    sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
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  2. Jamie

    Jamie Guest

    The op should be lucky its down that low on AC.

    I have an extech my self (different model), that seems to have
    a undocumented feature that appears to calibrate the AC mode of the
    clamp when I hold down one of the buttons for like 4 secs or more.
     
  3. This is a pretty basic model, no buttons, only 3 slide switches.

    And to Arfa's question, no not stray fields. :)

    Thanks!

    --
    sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  4. If it were the clamp-on DC range, it would be good. But the AC clamp-on
    is just a transformer secondary. It SHOULD read 0 with nothing there! :)

    --
    sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  5. Same offest open or closed. This meter is in mint condition, no visible
    damage anywhere.

    --
    sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
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