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Present Reading is 100 and Previous Reading is 91

  • Sigma calculates the consumption: 100  100 (present read) - 91 (previous read) = -9 (negative consumption)
    • As the consumption appears negative, Sigma checks if it is within the Clocking Threshold
      • 90 (Clocking Threshold) / 100 (Previous Meter Reading) = 0.90  x 100 = 90     
    • As the difference is  -9  (less than 90%) (the clocking threshold)
      • Sigma calculates a negative consumption of -9

                              

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  • Sigma calculates the consumption: 120 (present read) - 51  (previous read) = -61 (negative consumption)
    • As the consumption appears negative, Sigma checks if it is within 90% of the Clocking Threshold
      • 51 (present reading) / 120 (previous reading) = 0.425.   0.425 is less than .90 (90%), The reading of 51 is treated as a having gone round the clock
    • As the difference is more than 90% (the clocking threshold, Sigma calculates a positive consumption of 99,930
      • It is assumed that the meter has clocked, so calculates 9999 (Max Value) - 120 (previous reading) + 51 (current reading) = 99,930

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