KYORITSU 2434 - Manual (Page 7)

Note:
Characteristic of -24dB/octiave means that signal magnitude
declines to about one sixteenth of that at the initial frequency when
frequency doubles. Model 2434 have the following two settings for
the Frequency Selector Button.
WIDE (40Hz-): Permits measurement of currents of fundamental
frequencies as well as currents of high frequencies
generated by such equipment as inverters
50/60Hz (40-approx.160Hz): Filters out high frequency currents and
measures current of fundamental
frequency only
Recently there has been increased use of power through inverters,
switching regulators, etc. When the high frequency noise from such
appliances leaks or flows into the ground through capacitors not
filtering completely, the earth leakage breaker may trip even though
there is no "actual" leakage. In such a case, the instrument do not
give leakage current reading if "50/60Hz" frequency response is
selected.
Take current readings with the 50/60Hz and WIDE frequency
responses respectively to make effective use of the Frequency
Selector Button.
6-3 Load Current Measurement
(1)Set the Range Selector Switch to the desired position. Current to
measure should be within the selected measuring range.
(2)Measuring load current (See Fig.4):
Press the jaw trigger to open the transformer jaws and close
them over one conductor only.Measured current value is shown
on the display.
Fig.3 Model 2434 Frequency Characteristic
Fig.4 Measuring load current
Output characteristic are shown in Fig.3.
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100％
50％
20％
10％
5％
5ｋ 1ｋ 2ｋ 500 100 200 50 20 10
ー30
ー20
ー10
0
Attenuation〔dB〕
10
Frequency〔Hz〕
Percentage
Typical characteristic：
400mA/４A Range Typical characteristic：
“WIDE”frequency response
Typical characteristic：
“50/60Hz”frequency response
high-cut filter -24dB/oct
Typical characteristic：
100A Range
Load