MR4530 datasheet(31/43 Pages) SHINDENGEN

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Shindengen Electric MFG.CO.,LTD

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6.4 Precautions for waveform measurements

6.4.1 Isolating the AC line

When measuring the MR4000 Series or a peripheral

circuit using an oscilloscope or other such instrument,

isolate the AC line between the circuit to be measured

and the measuring instrument to prevent electric shock

and leakage.

6.4.2 Simultaneous measurement of primary and secondary sides

In the case of a power supply using the MR4000 Series, the AC input (primary) side and the DC output (secondary)

side are isolated from each other by a transformer. Do not use a measuring instrument on the primary and

secondary sides simultaneously. Otherwise, GNDs of different potentials may be connected; this can affect the

operation of the power supply or measurement results. (Example of method to avoid: Measure the primary and

secondary waveforms simultaneously using the voltage probe of an oscilloscope.)

To check both the primary and secondary waveforms simultaneously, use a differential probe for one of the two.

Fig. 6.17 Isolating the AC line

Do not measure

simultaneously.

Measurement GND

Fig. 6.18 Simultaneous measurement of primary and

secondary sides

6. Supplementary design information

MR4530 Datasheet(PDF) 31 Page - Shindengen Electric Mfg.Co.Ltd