Use your voltmeter to read what’s coming out of the wall and out of the P20. If those differ by a fair margin, use the plus and minus buttons to close that gap. John_H is right and do your best to write diligent notes. It will make it a lot easier.
Use your voltmeter to read what’s coming out of the wall and out of the P20. If those differ by a fair margin, use the plus and minus buttons to close that gap. John_H is right and do your best to write diligent notes. It will make it a lot easier.