A question about using a dual secondary transformer as a center tapped transformer

Above is transformer in question. And in case here is the datasheet: http://www.farnell.com/datasheets/2026060.pdf?_ga=1.56694762.1111228725.1474151580

As you see this is a single primary 6V dual secondary transformer. There is no center tap. And I measured with an ohmmeter that it seems like the two secondary outputs are not connected to each-other.

I'm trying to use this transformer as a center tapped one at the secondary side. The aim is to create a +6V 0 -6V split supply. If I connect B and C together would that be the center point(0) of a +6V 0 -6V transformer where A and D are the new terminals? A -6V D +6V relative to the new middle zero point(BC). I wanted to be sure before I try it and cause a possible hazard.

Answer

Yes, a B-to-C connection would be the obvious thing to try first. After making that connection (and before you connect anything else to A and D), measure the voltage between A and D. If it's 12V, you're all set.

If it's a very low value, then one of the windings needs to be reversed. Connect B to D and use that as your center tap, and then A and C become your "end" connections.