Amprobe ACD-330T Clamp-On-Multimeter Uživatelský manuál stáhnout pdf (Strana 39)

WAVEFORM COMPARISON

Table 3. illustrates the relationship between AC and DC components for common

waveforms, and compares readings for TRUE RMS meters and average-respond-

ing meters. For example, consider the first waveform, a 141.4AV (zero-to-peak)

sine wave. Both this Clamp-on meter and RMS-calibrated average-responding

meters display the correct RMS reading of 100.0V(the DC component equals 0).

However, consider the 200V(peak-to-peak) square wave, both types of meter cor-

rectly measure the DC component (0V). The clamp meter correctly measures the

AC component (100.0V). The average-responding meter measures 111.1V, which

amounts to an 11 %error.

The conversion factors in Table 3 show the differences between average sensing

instrument measurements and true RMS instrument

1 2 ... 34 35 36 37 38 39 40 41 42

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Amprobe ACD-330T Clamp-On-Multimeter Uživatelský manuál Strana 39