159
SV
104BIS User Manual
Calibration (electrical
)
Calibration level
114.0
dB (ref. 1μV
RMS
)
Basic accuracy
<
0.1 dB (for the temperature T =
+23°C
5°C for the
sinusoidal signal 114 dB
RMS
in the bandwidth 20
Hz ÷ 10
kHz
with the
Z
input filter
Voltage measurement error
in the full temperature range
<
0.1 dB when the temperature is from -
10°C to +40°C for the sinusoidal signal.
Overload detector
The instrument has the built-in overload detectors. The overload in the measurement channel (in its analogue
part) and the overload of the analogue /
digital converter are both detected. The “overload” indication is when
the input signal amplitude
is 0.5 dB above
the declared “Peak measurement range”
Anti-aliasing filter
Built-in electric anti-aliasing filter ensuring correct sampling of the measured signal.
Pass band (-3 dB)
11.3 kHz
Stop band
14.4 kHz
Attenuation in the stop band
> 50 dB
Sampling frequency
24 kHz
Analogue to digital converter
sigma-delta 24 bit
Internal oscillator accuracy
0.01% (for f = 1
kHz and T = +23°C)
Digital filters
Weighting filters
Z
meeting requirements of the IEC 61672-1:2013 standard for the Class 2
“
Z
“ filter
A
meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class 2
“
A
” filter
C
meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class 2
“
C
” filter
See part for the A and C filters characteristics.
Noise levels
(measured with the
SC 104BT
and source impedance
50
Ω
,
Microphone
compensation
switched-off)
”
Z
”
weighting
< 316
µV
RMS
, (50 dB)
”
A
”
weighting
< 126
µV
RMS
, (42 dB)
”
C
” weighting
< 112
µV
RMS,
(41 dB)
Noise levels during test according IEC 61252 p.12.5
(measured in presence of magnetic field
80A/m @ 50Hz, “the worst device orientation”, with the
SC 104BT
and source impedance
50
Ω
,
Microphone
compensation switched-off)
”
Z
”
weighting
< 251
µV
RMS
, (48.0 dB)
”
A
”
weighting
< 114
µV
RMS
, (41.2 dB)
”
C
” weighting
< 104
µV
RMS,
(40.4 dB)
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