I have a linear actuator whose DC motor is encapsulated and has no visible label or specification. I need to know for sure if it is 12V or 24V.
I have measured the voltage at the actuator terminals with a 12V supply connected and got a reading of 12.6V. Does this confirm it is a 12V motor?
Additionally, I would like to measure the internal resistance of the motor. How can I do this correctly and what range of values should I expect for a 12V motor? Is this method reliable for determining motor voltage?