large when doing such a “manual“ measurement!
- Be sure that no other persons are near by where you make your measure-
ments, as they could influence the results.
- The device and the used tripod must not be covered by dew. This could lead
to extremely inaccurate results.
- Operation with connected USB or audio cables or the included power supply
can distort the field and lead to extremely inaccurate results. Always measure
with battery supply and without any cables connected.
- Use the “panning approach“ to determine the E-field maximum as the E-field
sensor can only measure in one dimension. Otherwise, wrong (too low) levels
could be measured. This is especially possible, when several wires, signal
sources or various other sources of interference are occuring. On the other
hand, should you measure a single subject, such as a free-field high voltage
line, the measurement inaccuracy without the panning approach is often below
5% and therefore often tolerable.
WARNING!
Please note that various so-called “construction biologists“ and their
“measuring instruments“ wrongly measure
potentials
with ground reference.
This approach violates any applicable EMC security standards and is thus-
ly WRONG and legally worthless!
Consequently, the results obtained from such “measurements“ are
not
compa-
rable at all to results obtained with SPECTRAN, as SPECTRAN measures
according to standards (
potential-free
, without ground reference).
8.6 Sensitivity
Please be aware that with spectrum analysers, the noise floor and sensitivity
is
subject to significant fluctuations
depending on the frequencies measured. In
general you can say: the lower the frequencies, the higher the noise floor and
the worse the sensitivity. In practice:
Using the same filter settings, for exam-
ple, “100kHz“, you can measure significantly weaker fields than at the
“50Hz“ setting.
Also see the section “The 0Hz spike and the noise floor“
8.7 Measurement inaccuracy
Aaronia provides a
typical
accuracy rating for each SPECTRAN model.
However, this also means that higher deviations
could
happen.
Especially when approaching the so-called noise floor or the highest measura-
ble levels, accuracy will
naturally
decrease.
8.0 Correct measurement
Firmware V 1.0 / © 2005-2013 by Aaronia AG, D-54597 Euscheid, www.aaronia.com
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