[Al Skierkiewicz]

grosh,
From your description, it sounds like you either failed to wire one side of the pot to power common or the wire is broken. The voltage range with no power common connection is determined by the pot and the input impedance of the analog board. At 100 ohms, you are dissipating 1/4 watt in the pot. If it is not rated for that power, you should change values to something higher. 10k would be a better choice. What teams forget is that you can add a gear to the shaft of the pot and a gear to the device you are trying to measure. Just select the reduction that gives you about 200-240 degrees of rotation and you can use a standard one turn pot (nominally 270 degrees of rotation).