Elcontrol Microvip 3 plus - PRIMARY MEASUREMENT ACCURACY

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8.4.1 PRIMARY MEASUREMENT ACCURACY
• Measurement error in environment of 18°
°°
°C to 25°
°°
°C (after 10’ warming up):
expressed as ± % Rdg. (reading) + % F.S. (Full Scale) – see tables.
• Additional measurement error outside this temperature range:
± 0,02% F.S. for each °C outside range.
• Sensitivity and accuracy of voltage measurements:
Direct input with max voltage = 750 Vrms at Full Scale.
Input voltage peak factor ≥ 1,6.
Input impedance ≥ 4 MΩ.
Sensitivity, Full Scale and voltage accuracy
Rated
range
Sensitivity Full Scale
ε between 20% F.S.
and 100% F.S.
37 Vrms 24 mV
*
37,0 V 0,5%F.S.+ 0,5%Rdg.
174 Vrms 111 mV 174 V 0,3%F.S.+ 0,3%Rdg.
750 Vrms 480 mV 750 V 0,3%F.S.+ 0,3%Rdg.
(*) the minimum measurable signal is 1 V.
• Sensitivity and accuracy of current measurement:
Direct input with max. 1 Vrms at Full Scale.
Input current peak factor ≥ 1,6
Sensitivity, Full Scale and current accuracy
Rated
range
Sensitivity Full
Scale
**
ε between 20%F.S
and 100%F.S.
50 mV
32 µV
*
50 mV 0,5%F.S.+ 0,5%Rdg.
232 mV
140 µV
232 mV 0,3%F.S.+ 0,3%Rdg.
1 V
640 µV
1 V 0,3%F.S.+ 0,3%Rdg.
(*) the minimum measurable signal is 2 mV.
(**) Full Scales for 50,0 - 232 - 1000 Amp. with 1000 A/1V clamp meters provided
(Error = sum of instrument + clamp meter errors).
• Accuracy does not take account of clamp meter error.
• Voltage and current measurement precision as a function of frequency:
no error over errors specified in tables for signal frequencies in 20-90 Hz range.
8.4.2 SECONDARY MEASUREMENTS ACCURACY:
Power (single or three phase), Active Energy (and Power Factor) : class 1 (IEC 1036)
• Measurement of other secondary values:
error is expressed by the formula which defines the value (sections 8.6.1, 8.6.2 and 8.6.3), as a function of V, I and
W.