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None of the following is a reason to log rather than spot-measure except

  • A.the instrument is more accurate when logging
  • B.logging removes the need to calibrate the instrument
  • C.the tariff is the same at all times of day
  • D.the load varies through the day and the night

Answer: D

A varying load is precisely what a single reading cannot characterise, and the night-time base load is often the finding that pays for the audit. Accuracy and calibration are unaffected, and a flat tariff is an argument against logging rather than for it.

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