- 1
Measure each secondary output separately.netzteil zerlegt image by pmphoto from Fotolia.com
Read the specifications for the transformer to know what output voltage(s) to read on the secondary. - 2
Never attempt to measure a power company transformer.transfo image by Oliv from Fotolia.com
Adjust your multimeter to read voltage AC voltage at the scale appropriate for whichever voltage you want to read first. - 3). Touch the leads of the voltmeter to the two terminals for the specific output you want to read. Read the voltmeter and record the results.
- 4). Touch the leads of the voltmeter to the remaining terminals for the specific outputs you want to read. Read the voltmeter and record the results.
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