Limits Of The Permissible Relative Basic Error Of Measuring The Ac Voltage; Adc Own Input Noise - L-Card ADC Series User Manual

±1 V
±0.5 V
±0.2 V
Resistance to overloads by input measuring signal of DC voltage
Limits of the permissible relative fundamental error of the ADC
conversion frequency
AC voltage measurement range
Limits of the permissible relative basic error of measuring the AC
voltage

5.1.1. Limits of the permissible relative basic error of measuring the AC voltage

Frequency range of
input signal,
kHz
from 0.01 to 50 incl.
more than 50 to 100 incl.
more than 100 to 300
incl.
more than 300 to 999
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 is the AC voltage measurement limit,
AC
subband.
3 X is the final value of the set voltage subband.
К
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
2000
400
50
10
Limits of the permissible relative basic
error of measuring the AC voltage, %
X
Averaging
factor
±10
Typical value of the noise level, applied to the
1 420
5 185
20 93
128 40
92 dB
92 dB
92 dB
±15 V
±0.005 %
From 0.2 mV to 7 V
According to section
± +
[ , 0 15 , 0 02
± +
0 [ 3 , , 0 02
± + ×
1 [ , 0 03
± + ×
5 [ , 0 05
X
= К
where X is the value of the set voltage
K
AC
2
ADC subrange, V
±5 ±2
ADC input, μV
175 87
78 40
38 20
25 12
5.1.1
X
× −
AC
( 1 )]
X
X
× −
AC
( 1 )]
X
X
−
AC
( 1 )]
X
X
−
AC
( 1 )]
X
±1 ±0.5 ±0.2
40 26 23
18 12 11
10 7 6
7 5 4