Technical Data
83
6.11.6.4 Accuracy of Frequency Measurement
Figure 6-26:
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 6-40:
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 Measurement 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. Frequency Error / %
Error in frequency measurement as a function of the input voltage
(measured over 50 periods)
Rel. frequency error 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
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