How many measurement sampling frequencies does the waveform measurement function support?

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How many measurement sampling frequencies does the waveform measurement function support?

The measurement sampling frequency and time vary with the instrument being used. The instrument determines the optimal measurement sampling frequency to use based on the waveform being measured.

For example, when measuring a 60 Hz sine wave with th CM4372, the sampling frequency will be 2.88 kHz, and the sampling time will be 50 ms.

Since the period of a 60 Hz sine wave is 16.666 ms, 3 wavelengths will be displayed.

Since the CM4371-50 and CM4373-50 have a measurement time of 50 ms, you can display 3 cycles of a 60 Hz waveform.

Although this information is not part of the product specifications, instruments can measure the waveforms such as the following:

CM4371-50, CM4373-50, CM4375-50, CM4141-50, CM4372, CM4374, CM4376, CM4142, DT4261

AC/DC CLAMP METER CM4371-50

AC/DC CLAMP METER CM4373-50

AC/DC CLAMP METER CM4375-50

AC CLAMP METER CM4141-50

Discontinued

AC/DC CLAMP METER CM4372

Discontinued

AC/DC CLAMP METER CM4376

Discontinued

AC CLAMP METER CM4142

DIGITAL MULTIMETER DT4261

Measurement signal frequency	Sampling frequency	Sampling time
0 Hz ≦ freq < 40 Hz	1.44 kHz	100 ms
40 Hz ≤ freq < 80 Hz	2.88 kHz	50 ms
80 Hz ≤ freq < 160 Hz	5.76 kHz	25 ms
160 Hz ≤ freq < 390 Hz	14.4 kHz	10 ms
390 Hz ≤ freq < 1000 Hz	28.8 kHz	5 ms

CM3286-50, CM3286-01

AC CLAMP POWER METER CM3286-50

Discontinued

AC CLAMP POWER METER CM3286-01

Measurement signal frequency	Sampling frequency	Sampling time
freq ≦ 55 Hz	12.8 kHz	20 ms
freq > 55 Hz	15.36 kHz	16.6 ms

CM4001

AC LEAKAGE CLAMP METER CM4001

Measurement signal frequency	Sampling frequency	Sampling time
40 Hz ≤ freq < approx. 80 Hz	2.88 kHz	50 ms
Approx. 80 Hz ≤ freq < approx. 160 Hz	5.76 kHz	25 ms
Approx. 160 Hz ≤ freq < approx. 390 Hz	14.4 kHz	10 ms
Approx. 390 Hz ≤ freq < 1000 Hz	28.8 kHz	5 ms

CM4002, CM4003

AC LEAKAGE CLAMP METER CM4002

AC LEAKAGE CLAMP METER CM4003

Measurement signal frequency	Sampling frequency	Sampling time
40 Hz ≤ freq < approx. 80 Hz	2.4 kHz	50 ms
Approx. 80 Hz ≤ freq < approx. 160 Hz	4.8 kHz	25 ms
Approx. 160 Hz ≤ freq < approx. 390 Hz	12 kHz	10 ms
Approx. 390 Hz ≤ freq < 1000 Hz	24 kHz	5 ms

FT6380-50

CLAMP ON EARTH TESTER FT6380-50

Measurement signal frequency	Sampling frequency	Sampling time
30 Hz ≤ freq < 40 Hz	1 kHz	160 ms
40 Hz ≤ freq < 80 Hz	2 kHz	80 ms
80 Hz ≤ freq < 160 Hz	4 kHz	40 ms
160 Hz ≤ freq < 400 Hz	4 kHz	20 ms

CM7291

DISPLAY UNIT CM7291

Measurement signal frequency	Sampling frequency	Sampling time
0 Hz ≤ freq < approx. 40 Hz	500 Hz	200 ms
Approx. 40 Hz ≤ freq < approx. 80 Hz	1 kHz	100 ms
freq ≥ approx. 80 Hz	2 kHz	50 ms

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