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A digital panel meter differs from a bench digital voltmeter chiefly in

  • A.having a single fixed range and no controls
  • B.using a successive approximation converter rather than a dual slope one
  • C.requiring an external reference voltage to be supplied to it
  • D.displaying its reading in binary coded decimal rather than in numerals

Answer: A

It is built into equipment to display one quantity, so ranges, function switches and probes are unnecessary and the scaling is fixed by external resistors. The converter inside is usually the same integrating type as in a bench instrument.

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