Instrument drift refers to?

  • AA gradual change in indication with time when the measured quantity is unchanged
  • BAn instantaneous perfect response
  • CA deliberate range selection
  • DA fixed unit conversion
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Correct Answer: A. A gradual change in indication with time when the measured quantity is unchanged
Explanation: Drift is an undesired gradual change in instrument output with time despite an unchanged input.
Reference: Standard measurements and instrumentation: instrument characteristics