Omicron CMC 356, User Manual

Page: 79 / 142

Technical Data
79
6.10.6.4 Accuracy of Frequency Measurement
Figure 6-27:
Error in the frequency
measurement as a
function of the input
voltage
Conditions: integration time 1 s, measurement signal sinusoid.
The maximum input frequency for the frequency measurement depends on
the sampling rate.
Table 6-37:
Sampling rate and input
frequency range.
Conditions: Excitation greater than 10 % from measurement full scale, duty
cycle 50 %.
Note: With the harmonic analysis, input frequencies up to 3.4 kHz can be
measured.
Error in Frequency Measurem ent as a Function of the input voltage
(Measured over 50 Periods)
0,001
0,01
0,1
1 10 100 1000
Voltage signal in % of full range
Rel
. F
req
u
en
cy Erro
r /
%
Error in frequency measurement as a function of the input voltage
(measured over 50 periods)
Rel.
frequen
cy
err
or
in
%
Voltage signal in % of full range
Sampling rate Input frequency range
28.44 kHz 10 Hz ... 1500 Hz
9.48 kHz 5 Hz ... 500 Hz
3.16 kHz 5 Hz ... 150 Hz