"Recordable UT" sounds like a Phased Array "C" or "C + D" scan, saved electronically.
The only other recorded UT scans would be thickness B- or C-scans, totally not applicable to corner joints. I would recommend an Omniscan unit, it will give you simultaneous C and D Scans.
I also typically run a USM-35 DAC. Nice instrument, but not Phased Array, and it doesn't record.