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Test lead repair/replace question.

Discussion in 'Electronic Repair' started by David Farber, Nov 28, 2013.

  1. David Farber

    David Farber Guest

    I have to old meters that need test leads. One is a Simpson 464-2. The other
    is a Triplett 630-APL. The tip of the red test lead shown here in the center
    of the photo,
    http://webpages.charter.net/mrfixiter/images/Test_leads/Test-leads.jpg

    has broken off. I can push it back into its correct place but as soon as I
    remove the test lead from the meter's receptacle, for example to change it
    from voltage to current input, the tip remains in the receptacle and I have
    to fish it out. I don't suppose there's a nifty way to fix this, is there?

    The large plug on the far right of the photo came with the Triplett meter
    when I acquired it. It will fit into the Simpson meter but the plugs at the
    end of the Simpson test leads are too short to make a good connection into
    the Triplett meter.

    Is it possible to get a pair of test leads that would fit either meter? Do
    you have a preference for a supplier of these leads?

    Happy Thanksgiving and thanks for your reply.
     
  2. Guest

    About all you can do is put a new banana plug on the end of the lead.
    Life becomes exciting in a hurry when you have the probe on a 240 V,
    30 A circuit and the plug falls out of the meter and starts swinging
    around. Most electronics suppliers stock suitable banana plugs. Pomona
    (see below) is a well-known manufacturer and has drawings for most of
    their parts, so you can compare them to the ones that you have to find
    one that will likely fit. The part search on Pomona's site kind of
    sucks, though... it's easier to use the search at Digi-Key or Mouser,
    and then if they don't have a link to the drawing, go back to Pomona's
    site to find it.

    It should be.

    Pomona has nice test leads, and lots of nifty clips and grabbers and
    things that work with them. Rat Shock has a couple of sets that you can
    at least look at before you buy. A local electronics distributor may
    have a few sets that you can look at, but the prices may or may not be
    reasonable.
    This. Most lead sets have these now. You can *probably* cut off the
    plastic shroud on the plugs and get it to work.

    Note that you can go the other way: an unshrouded plug *will* fit most
    newer meters and other equipment that expects a shrouded plug. It's not
    as "safe", but you're sticking test probes into live equipment in the
    first place...

    Pomona still has a few lead sets that don't have the shroud: 5309A,
    5325A, 5672A. $15 to $30 at Mouser and other suppliers.

    http://www.pomonaelectronics.com/pdf/d5309a_101.pdf
    http://www.pomonaelectronics.com/pdf/d5325a_100.pdf
    http://www.pomonaelectronics.com/pdf/d5672a_101.pdf

    If you want it today, Rat Shock has an $8 set (278-708) and a fancier
    $19 set (278-038). You'll have to cut the shroud off of the plugs on
    both of these; one reviewer of the cheap set says they did that and it
    worked.

    http://www.radioshack.com/product/index.jsp?productId=2102874
    http://www.radioshack.com/product/index.jsp?productId=11931581

    I bought the $8 set, or its predecessor, at Radio Shack several years
    ago as a replacement for one of my handheld DMMs, and it works OK. It
    didn't have all the safety approval markings actually on the leads, so
    if you're using them where somebody will care about that, you might
    want another set.

    You can also buy probes that have banana jacks in the ends (Pomona
    5689A, 6232A, 6479), and then make or buy test leads of whatever length
    you want with banana plugs on each ead.

    Matt Roberds
     
  3. David Farber

    David Farber Guest

    Hi Dave and Matt,

    Thanks for all the links and info. Looks like the Pomona, solderless banana
    jack, http://www.pomonaelectronics.com/pdf/d1825-4897-4899-6545_101.pdf will
    do the trick. Mouser has them in stock.

    I did notice that the original Simpson test leads that I have use a 10.5 mm
    banana plug whereas the one that came with the Triplett meter is 14 mm. The
    Pomona plug is a 14 mm plug as well.
     
  4. Shaun

    Shaun Guest

    "David Farber" wrote in message
    I have to old meters that need test leads. One is a Simpson 464-2. The other
    is a Triplett 630-APL. The tip of the red test lead shown here in the center
    of the photo,
    http://webpages.charter.net/mrfixiter/images/Test_leads/Test-leads.jpg

    has broken off. I can push it back into its correct place but as soon as I
    remove the test lead from the meter's receptacle, for example to change it
    from voltage to current input, the tip remains in the receptacle and I have
    to fish it out. I don't suppose there's a nifty way to fix this, is there?

    The large plug on the far right of the photo came with the Triplett meter
    when I acquired it. It will fit into the Simpson meter but the plugs at the
    end of the Simpson test leads are too short to make a good connection into
    the Triplett meter.

    Is it possible to get a pair of test leads that would fit either meter? Do
    you have a preference for a supplier of these leads?

    Happy Thanksgiving and thanks for your reply.

    --
    David Farber
    Los Osos, CA



    You could put the springy part of the banana plug into the lead connector
    and try soldering it right where they meet. You will probably have to clean
    the metal surfaces with some abrasive first to get the solder to wet and
    hold.

    I used to repair test lead sets many years ago for customers.


    Shaun
     
  5. Leif Neland

    Leif Neland Guest

    Do not reply below the tagline separator ( --) or yoyr reply can't be
    read and replied to by many newsreaders.

    And if possible, get a newsreader which can properly mark quotes.

    Leif
     
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