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NI 9242 User Manual and Specifications
Note
Accuracy specifications are valid for L-L, L-N
and L-Earth measurements
.
Input noise at 50 kS/s
N-Earth and L-Earth................... 2.12 mV
rms
L-N and L-L
1
.............................. 3 mV
rms
Note
When measuring the amplitude of the
fundamental frequency over one or several power cycles
the noise of the measurement reduces significantly
(theoretically with the square root of the number of
samples in the acquisition window).
Nonlinearity (at 25 °C) ..................... 20 ppm
Stability
Gain drift .................................... 12.1 ppm/ °C
Offset drift .................................. 3.4 mV/ °C
1
The NI 9242 returns L-N and N-Earth values only. Refer to
Converting L-N Measurements to L-Earth
sections for
details on changing the point of reference of the measurement.