Configuration of a dt2801

Hi,

I'm trying to configure an old ISA DT2801-A board.
The W4/W5 jumper should select biploar/unipolar
ADC conversion respectively.
Whatever I use for this jumper, any negative
input voltage on an ADC channel produces 0 (while
grounding the input produces an integer level of 9)

Does anyone use a board of this kind ?

Thank you,

Benoit Mathieu

Received on 2002-10-29Z09:00:14