Re: TM500 Plug-in Extention


EJP
 

To put It another way, if my DMM ground is in the lower (5VDC) banana plug, I can’t read anything on either +/-20VDC, and vice-versa.
That's the correct behaviour. The +/-20V posts are all floating, including the centre one. You can't measure anything ref. ground on them. If you can in one configuration something is badly wrong with it, i.e. one of the three is grounded and shouldn't be.

EJP

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