I need to measure pulse width on automotive injectors. The trouble is that the ECU switches the ground side, not the high side. When we connect the injector signals to the counter timer board, in this case a PCI-6602, the ground is pulled down and the injector opens continuously.
We can see this signal on the scope with high impedance, but not with the card because of the short to ground.
Thank you.
Programming Data Acquisition and Control in Measurement Studio and Labwindows/CVI
