[filter board] Question about acceptable values at step 5

Hi there,

I’ve just finished the first part of the filter board assembly. I’m at step 5, where i should check the V value at different point on the pcb.

It should be 5V (±0,1) and i get 5,51 for the red dots and -4,7 for the green dots. Is that acceptable?

Any advice would be helpful

Thanks

A.

The 5.5V worries me a bit. Do you have another meter to cross-check?

Yes i have another, but i just ran out of batteries, i’ll check tomorrow.

Thanks for your quick answer.

I found another meter, and everything is ok.
I don’t understand why the first one (who is the more sophisticate) is so wrong…

Thanks for your time.

battery is empty so the internal voltage reference does not work properly.