L-Card ADC Series, User Manual, Page: 47 / 69

±1 V 92 dB
±0.5 V 92 dB
±0.2 V 92 dB
Resistance to overloads by input measuring signal of DC voltage ±15 V
Limits of the permissible relative fundamental error of the ADC
conversion frequency ±0.005 %
AC voltage measurement range From 0.2 mV to 7 V
Limits of the permissible relative basic error of measuring the AC
voltage
According to section
5.1.1
5.1.1. Limits of the permissible relative basic error of measuring the AC voltage
Frequency range of
input signal,
kHz
Limits of the permissible relative basic
error of measuring the AC voltage, %
from 0.01 to 50 incl. )] 1 ( 02 , 0 15 , 0 [
− × + ±
X
X
AC
more than 50 to 100 incl. )] 1 ( 02 , 0 3 , 0 [
− × + ±
X
X
AC
more than 100 to 300
incl.
)] 1 ( 03 , 0 1 [
− × + ±
X
X
AC
more than 300 to 999 )] 1 ( 05 , 0 5 [
− × + ±
X
X
AC
Notes
1 The error in measuring the AC voltage is normalized in the differential connection scheme E-502
at the ADC conversion frequency of 2000 kHz, for signals whose peak values do not exceed the
value of the set measurement subband.
2 X
AC
is the AC voltage measurement limit,
2
К
AC
X
X
=
where X
K
is the value of the set voltage
subband.
3
X
К
is the final value of the set voltage subband.
4 X is the value of the measured voltage.
5.1.2. ADC own input noise.
Data entry rate,
Kword/s
from one ADC
channel Averaging
factor ADC subrange, V
±10 ±5 ±2 ±1 ±0.5 ±0.2
Typical value of the noise level, applied to the
ADC input, μV
2000 1 420 175 87 40 26 23
400 5 185 78 40 18 12 11
50 20 93 38 20 10 7 6
10 128 40 25 12 7 5 4