Svantek SVAN 977A - Page 229

229
SVAN 977A User Manual - Appendixes
Effect of magnetic field < 15 dB (A) or < 25 dB (Z) (for 80 A/m and 50 Hz)
Effect of Vibration < 0.1 dB (from 20 Hz to 1000 Hz at 1 m/s
2
)
Antialiasing filter
Built-in antialiasing filter. Second-order analogue filter, passive Class, combined with on-chip FIR digital filter
of the analogue-to-digital converter, ensuring correct sampling of the measured signal.
Pass band (-1 dB) 22.200 kHz or 44.4 kHz
Pass band (-3 dB) 23.520 kHz or 47.0 kHz
Stop band 26.256 kHz or 52.53 kHz
Attenuation in the stop band > 80 dB.
Sampling frequency 48 kHz or 96 kHz (internal only).
Analogue to digital converter 1 x 24 bit
Reference range LOW
Input attenuator accuracy

0.1 dB (for f = 1 kHz and T = +23°C)
Internal oscillator accuracy 0.01 % (for f = 1 kHz and T = +23°C)
Digital Filters
Weighting filters
• A meeting requirements of the IEC 61672-1:2013 standard for the Class 1 “A” filter
• C meeting requirements of the IEC 61672-1:2013 standard for the Class 1 “C” filter
• Z meeting requirements of the IEC 61672-1:2013 standard for the Class 1 “Z“ filter
• B meeting IEC651 for the Class 1 filter
See Chapter C.3 for the A, C, B and Z filters characteristics.
Noise voltage measured with SV12L preamplifier, equivalent impedance-adapter Class of ST02 and 50 Ω
input impedance, 20kHz Bandwidth.
Range Low
• ”A” weighting < 2.8 µV
RMS
• “B” weighting < 2.8 µV
RMS
• ”C” weighting < 2.8 µV
RMS
• ”Z” weighting < 7 µV
RMS
.
Range High
• ”A” weighting < 7 µV
RMS
• “B” weighting < 7 µV
RMS
• ”C” weighting < 7 µV
RMS
.
• ”Z” weighting < 17.6 µV
RMS