Svantek Shawcity SVAN 977C, User Manual

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SVAN 977C User Manual - Appendixes
Basic accuracy <

0.2
dB (for the temperature T=+23°C

5°C for sinusoidal
signal 1 V
RMS
in the band 10
Hz ÷ 20 kHz with
HP filter)
Measurement error in the full temperature range
<

0.1 dB (when the temperature is from -
10°C to +50°C for the
sinusoidal signal 1 V
RMS
in the band 10
Hz ÷ 20 kHz with
Z filter)
Overload detector
The instrument has the built-in overload detectors. Both A/D converter and input amplifier overload conditions
are detected. The overload in the measurement channel (in its analogue part) and the overload of the
analogue /
digital converter are both detected. The “overload” indication appears when the input signal
amplitude is 0.5 dB above t
he declared “Peak measurement range”.
Warm-up time 1 min. (for 0.1 dB accuracy).
Effect of humidity < 0.5 dB (for 30%<RH<90% at 40

C re Reference conditions)
Effect of magnetic field
< 5 µV
RMS
(A) or < 20
µV
RMS
(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
)
Electrostatic and radio frequency criteria
– see Chapter C.1.1
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.4 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, 20 kHz Bandwidth.