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  • EEVblog #171 – Agilent U1272A Multimeter Teardown

    Posted on May 21st, 2011 EEVblog 9 comments

    A teardown of the Agilent U1272A Multimeter
    Photos of the Teardown are here:
    http://www.flickr.com/photos/eevblog/sets/72157626761928610/

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    9 responses to “EEVblog #171 – Agilent U1272A Multimeter Teardown” RSS icon

    • Phil Reynolds

      Well, nice meter, shame about the problems. The construction is about the best I’ve seen, let down just slightly by the inclusion of two wires… if they’d gone for a board-mounted sounder, it would have been even better.

      I hope the problems affecting this meter are resolved – it looks good on the surface. Reportedly it meets IP54. If the problems are solved it can go on my list of “if I had the money” meters.

      • Don’t forget this meter is (supposed to be?) water and dust proof. If the buzzer is placed inside the sealed compartment you would not be able to hear it. (Or it would require more power to drive it). There is probably a hole in the case to let the sound out and the buzzer is probably glued all around the outside for a proper seal.

        • It’s not water proof, it’s only splash proof. The buzzer mounting using wires or springs has nothing to do with that. These buzzers are always on the inside and rely on propagation through the case to work.

    • Nice teardown Dave.
      Very good construction, i think the wires for the buzzer are necessary, because there is no space on the PCB for the springs where the buzzer is placed on the backcover.

      I hope Agilent gets this Problems solved, would be a “nice to have” Meter.

    • I reckon that atmel is an eeprom chip for storing calibration values…

      As for the meter’s strange behaviour, have you found the cause?

    • I reckon that atmel chip is an eeprom for storing calibration values…

      As for the meter’s strange behaviour, have you found the cause?

    • Looks very nice, but I am also quite surprised by the number of discrete components in there compared to the other meters you have torn down, both at the high and low end. Do you have any theories as to why or how a device might make it to production like that?

      • The most of the Ic are analog switches, so they can make the big selector switch relativly simple, as in this meter.
        By useing discrete components you can design your functionality as you like it, and you are not so dependable from your chip suppliers.

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