AFJ Instruments LT32C/10 Instrukcja obsługi - Strona 13
Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Sprzęt sieciowy AFJ Instruments LT32C/10. AFJ Instruments LT32C/10 18 stron. Artificial mains network (lisn)
Drukuj stronęC.3 • USE OF THE ARTIFICIAL HAND
An artificial hand, simulating 510Ω + 220pF impedance, in accordance with CISPR 16-1 requirements, is
provided via a specific outlet on the front panel of the LISN.
Such outlet, should be used to connect the metal foil wrapping the handle, or holding appendices, of an
appliance, or DUT anyway, built under CLASS II (no Protective Earth circuit) insulation rules, when
subject to test as per CISPR 16 recommendations.
The purpose of the metal foil, is to simulate the capacity of a human hand holding the DUT (therefore,
"artificial hand").
C.4 • THE AUXILIARY EARTH
An auxiliary earth outlet, indicated by the DIN "ground" symbol, is also provided on the front panel
of the LISN.
It can be used whenever a supplementary ground is required during a measurement.
It is NOT SUITABLE as a PROTECTIVE EARTH for the LISN.
C.5 • THE FLOATING EARTH
During normal operation, the artificial earth condition must be "non floating" (such condition is
attained by the relevant pushbutton on the LISN front panel, and the LED must be OFF).
Whenever the DUT dimensions are such that the Protective Earth conductor is long enough to show
a significant impedance, or be close to ¼ of a possible wavelength, or the enclosure has poor
conductivity, the test will be performed using the non-fused, built-in artificial protective earth (as
requested, i.e., by VDE 0877 part 1).
The artificial protective earth, implements a standardized reference impedance of 50Ω // 50µH, as
requested by the applicable documentation.
The protection capabilities of the non-fused protective earth still hold.
AFJ LT32C/10 LISN - Operating Manual - rev. 3.8 / 2019-01
Distributed by:
Reliant EMC LLC
3311 Lewis Ave, Signal Hill CA 90755,
408-916-5750, www.reliantemc.com
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