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of IEC688:1992
Error in measurement when a Twice the error allowed at the end of the reference
measurand is within its measuring range adjacent to the section of the measuring
range, but outside its range where the measurand is currently operating
reference range. or being tested.
4.3.4 Reference conditions
Reference conditions of measurands and, where applicable, components of the measurand
Values of measured quantities, and of components of measured quantities, where the intrinsic
(headline) errors for the measured quantities apply.
Voltage 50 .. 100% of nominal
Current 10 .. 100% of nominal
Frequency Nominal ±10%
Active power (Watt) 10 .. 100% of nominal
Voltage Nominal ±2%
Current 10 .. 100% of nominal
Active power factor 1 .. 0.8 leading or lagging
Reactive power (VAr) 10 .. 100% of nominal
Voltage Nominal ±2%
Current 10 .. 100% of nominal
Reactive power factor 1 .. 0.8 leading or lagging
Apparent Power (VA) 10 .. 100% of nominal
Voltage Nominal ±2%
Current 10 .. 100% of nominal
Power factor 1 .. 0.8 leading or lagging
Voltage Nominal ±2%
Current 40 .. 100% of nominal
4.3.5 Reference conditions of influence quantities
Values that quantities which affect measurement errors to a minor degree have to be for the
intrinsic (headline) errors for measured quantities to apply.
Ambient temperature 23°C
Input frequency 50 or 60 Hz ±2%
Input waveform Sinusoidal (distortion factor 0.005)
Auxiliary supply voltage Nominal ±1%
Auxiliary supply frequency Nominal ±1%
Auxiliary supply distortion factor 0.05
Magnetic field of external origin Terrestrial flux
50
Integra 1540, 1000, 0640, 0440, 0340, 0240 Issue 1 04/03