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Measuring instrument

  • US 7,721,455 B2
  • Filed: 10/31/2008
  • Issued: 05/25/2010
  • Est. Priority Date: 11/05/2007
  • Status: Active Grant
First Claim
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1. A measuring instrument comprising:

  • a detector that outputs a measured value as an electric signal;

    a digital display unit;

    an analog display unit in which a plurality of display segments are arranged at equal intervals in an encircling belt; and

    a display controller that displays the measured value detected by the detector on the digital display unit and the analog display unit,wherein the display controller includes;

    a tolerance range display unit that lights or blinks display segments corresponding to a preset tolerance range relative to a preset value;

    a first determiner that obtains a difference between a preset value and a present measured value, and determines whether the difference is within an analog display range wider than the tolerance range;

    a difference display unit that lights a display segment corresponding to last one or last two digits of the present measured value when the first determiner determines that the difference is within the analog display range;

    a second determiner that determines whether the difference is within the tolerance range; and

    an acceptance or rejection display unit that displays a result determined by the second determiner.

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