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simpson 260 meter questions

Discussion in 'Electronic Basics' started by Mike, Oct 12, 2004.

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  1. Mike

    Mike Guest

    Hey, I'm in the market for a simpson 260-6XLM meter. Unfortunately, I found
    one I wanted, but pictures reveal the needle just below infinity (also
    slightly below zero). In all the pictures I received from the seller, none
    convince me otherwise that the meter will need to be calibrated physically.

    Anybody know how big of a job this is? I'm guessing this should be left to
    the pros?

    Thanks for any feedback!

    Mike
     
  2. CFoley1064

    CFoley1064 Guest

    Subject: simpson 260 meter questions
    Hi, Mike. Simpsons have the capability for limited zero adjustment. I kind of
    wish the picture had shown "dead-on" zero. If the seller had a picture with it
    close but not on, it might mean that the adjustment won't go all the way to
    zero, which might mean the meter movement has been damaged.

    The pictuire with the meter at full scale deflection (infinity) was probably to
    show that the ohms works. No problem there.

    I would have to assume the seller wants to put his meter in its best light. If
    the picture shows the meter zero off, I'd have to assume that's because it
    won't zero. Probable meter movement damage. Don't buy it.

    Chris
     
  3. Mike

    Mike Guest

    Chris, thanks. I think I will stay way from it. While the ohms can be
    adjusted, all of the other functions would be off.

    Cheers.
     
  4. Mike

    Mike Guest

    I just read this in the simpson owners manual:

    """
    4.3 Adjust Pointer for Zero
    With the Instrument in the operating position, check the pointer for zero
    indication
    at the left end of the scale when there is no input. If pointer is off zero,
    adjust the
    screw located in the meter cover below the center of the dial. Use a small
    screwdriver
    to turn the screw slowly clockwise or counterclockwise until the pointer
    rests
    freely over the zero mark at the left end of the scale. This procedure will
    avoid
    disturbances to the zero setting by subsequent changes in temperature,
    humidity,
    vibration and other environmental conditions.
    """

    Maybe I have nothing to worry about since I can set the left-scale to zero?

    Thanks.
     
  5. Bruce

    Bruce Guest

    I have a Simpson 260 series 8, and even the photo in the manual shows the needle
    below infinity, but it's super easy to adjust with the screw below the meter face.

    If you can, just ask the person selling it if the meter zero adjustment works. It
    probably does. This is an awesome meter. I've had mine for around 5 years, and
    never had a single problem with it. We use it pretty much every day even with a
    Fluke 123 Scope Meter sitting close by.
     
  6. CFoley1064

    CFoley1064 Guest

    Subject: Re: simpson 260 meter questions
    I've got a 260, and have repaired them occasionally for years. Sometimes if
    the movement slams against the end stop, it damages the movement. The person
    who took the picture may or may not have been aware of the black screw, but you
    have to assume they were. In that case, that's the best it can do, and
    probably isn't worth the chance. The meter movement is one of the more
    expensive replacement parts.

    There's something wrong with the meter as shown in the display picture. That's
    enough to stop me by itself. At best, instruments on ebay are chancy,
    especially from sellers without a history.

    Chris
     
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