Contrel EMA90, User Manual, Page: 8 / 64

EMA90 - USER MANUAL
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2.2) MEASURING METHOD AND ACCURACY
Measuring range
30-500Hz.
Measuring method
64 sampling per period for V1 and I1, V2 and I2, V3 and I3.
Measuring interval 0,1 second.
Instrument accuracy
Model EMA90 Model EMA90-05
Voltage < 0.5 % < 0.25 %
Current < 0.5 % < 0.25 %
Power < 1 % < 0.5 %
Energy < 1 % < 0.5 %
Power Factor < 1 % < 0.5 %
Standard EN 62053-21 EN62053-22
Sampling frequency
45 Hz=2.280 or at 60 Hz = 3,88kHz
Zero self-regulation
Offset
0,1 second.
RTC - REAL TIME CLOCK
Accuracy: 5 PPM, standard CEI-EN 61038