Hioki 3283-20 - 3.2 Reducing Noise (Filter Function - FILTER)

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Reducing Noise (Filter Function – FILTER)
3.2 Reducing Noise
(Filter Function – FILTER)
The widespread use of switching power supplies and equipment
incorporating inverter technology can cause high-frequency
components to be superimposed on leak current waveforms. Use the
lter function to eliminate unwanted high-frequency components.
FILTER OFF FILTER ON
The frequency bandwidth with the lter function enabled is limited to
approximately 180 Hz (-3 dB), comparable to the frequency bandwidth
for an ordinary leakage breaker. It is recommended that the lter
function be used when analyzing leakage breaker operation.
20
10
0
-10
-20
-30
1 10 100 1000 10000 100000
Frequency bandwidths (with 10 mA current range used)
Frequency [Hz]
Amplitude [dB, 0 dB = 1 V]
FILTER: ON
FILTER: OFF