General Information 1-5
1.6 Isotropic E&H field
analyzer EHP-50F
typical uncertainty
and anisotropy
1.6.1 Typical uncertainty
of EHP-50F
The uncertainties stated in this document have been determined according
to EA-4/2 [4].
They were estimated as expanded uncertainty obtained multiplying the
standard by the coverage factor k=2, corresponding to a confidence level of
about 95%.
The total uncertainty of the probe derived from typical contributions of
linearity, anisotropy, frequency response, temperature, relative humidity and
with/without contribution of uncertainty of calibration.
Magnetic probe
(1)
Magnetic flux
density
range
Total expanded uncertainty (k=2)
Without contribution of
uncertainty of
calibration U
EHP50F
(%)
With contribution of
uncertainty of
calibration U
T
(%)
Frequency at 50 Hz
50 nT to < 100 μT 2.3 3.0
(2)
100 μT to 3000 μT 2.6 3.8
(3)
Frequency from 5 to 40 Hz 50 nT to 10.0 μT 5.3 5.7
(2)
Frequency from 40 to 100 kHz 50 nT to 10.0 μT 4.9 5.3
(2)
(1) This uncertainty budget is for an ambient temperature of (23 +/- 4) °C, and relative humidity of (50 +/- 5) %
The expanded uncertainty for magnetic flux density for values close to 50 nT is calculated with negligible contribution
of noise level.
(2) The uncertainty of calibration used is 2,0%
(3) The uncertainty of calibration used is 2,8%
Electric probe
(4)
Electric field
range
Total expanded uncertainty (k=2)
Without contribution
of uncertainty of
calibration U
EHP50F
(%)
With contribution of
uncertainty of
calibration U
T
(%)
Frequency at 50 Hz
1 V/m to 1000 V/m 7.1 7.4
(5)
1 V/m to < 100 kV/m 7.8 8.2
(6)
Frequency from 5 Hz to 100 kHz 1 V/m to < 1000 V/m 8.8 9.2
(6)
(4) This uncertainty budget is for an ambient temperature of (23 +/- 4) °C, and relative humidity of (50 +/- 5) %
(5) The uncertainty of calibration used is 2,0%
(6) The uncertainty of calibration used is 2,5%
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