AFJ Instruments LT32C/10 Manuale operativo - Pagina 14
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Stampa la paginaSECTION D: OPERATING INSTRUCTIONS
D.1 • CURRENT LOAD
When performing measurements using LINE IMPEDANCE STABILISATION NETWORKS, the test setup
and the test procedures, are based on the recommendations of the relevant reference documents.
The maximum current consumption of the connected test object may not exceed 32A in continuous
operation. In ambient temperature of 23°C is presupposed.
At higher ambient temperatures, a reduction of the maximum current consumption is necessary. In
any case, a good possibility of ventilation of the line impedance stabilisation network is to be ensured.
The intake and outlet openings for the ventilators on the rear of the device must be freely accessible
in any case, in order to ensure good ventilation.
The line impedance stabilisation network has not been provided with its own protective device. Please
ensure that no overload results in operation due to the flow of current. The high-current coils in the
interior of the line impedance stabilisation network are not protected against overload. An excessively
intake of current would destroy the integrated coils with a thermal overload.
D.2 • MEASUREMENT
The measuring device connected to the signal outlet on the front panel directly displays the
interference voltage on the selected conductor L1 to L3 and N.
A LED displays the phase selected for measurement in each case.
During the measurement, the test object may only be switched on or off with the possibilities stated
in its operating instructions. It's forbidden cutting off the supply lines under voltage. This is for safety
reasons and to avoid uncontrollable excessive increases of by such manipulations due to the energy
stored in the coils of the LISN. At the end of a measurement, it is recommended that the connected
measuring device be removed from the circuit first and that only then the consumer be switched off.
The evaluation of a number of measurements has shown that a good suppression of interference's in
the medium frequency range between 150kHz and 30MHz also has a distinct positive influence on the
interference reflection above this range of frequencies with a corresponding design and arrangement
of the mains filters.
AFJ Instruments will be pleased to help you with the design of a suitable mains interference
elimination filter.
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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