Hi I am using DIAdem 8.1 with a 6023E and NI-DAQ 7.2. When reading analog voltage from a channel (unreferenced, single ended) readings are random (just like no sensor is connected to the attached SCB-68), but only when using software clock (100 Hz). When using hardware clock (same rate) everything works fine. Problem occured after reinstalling Win2K on the system.
I have try to reproduce the error without success. It seems, as if your settings hardware or software are wrong. Try to create another channel on your 6023E board.