I recently purchased a few of these to use in a project I am developing at work but for some reason the output voltage can never rise above 8.5V with 12.2V input. This in itself is curious because the unit is meant to regulate voltage between 9 and 30V in/out.
Adjusting the adjustment screw (which is profoundly difficult by the way) doesn’t seem to make any difference at all.
The unit gets very hot and I am cautious of destroying it.
The load is a 12V halogen light which can vary as its temperature varies. The idea is to keep voltage at a constant 12.2V and therefore brightness constant, for scientific applications, regardless of the temperature/resistance of the light.
Why would this be happening? How can I increase the voltage?