Turbine Governor

Governor Definition: a: An attachment to a machine for
automatic control or limitation of speed. b: A device giving
automatic control (as of pressure or temperature).
A Governor is a device which controls the energy source
to a prime mover to control its power for a specific
purpose.
Basic governors sense speed and sometimes load of a
prime mover and adjust the energy source to maintain the
desired level.
Advanced governors are often referred to as
Control
Systems.
I would just like to clarify one confusion here that the main role of the governor is not to increase or decrease the speed which can be done via fuel control system (similar to an accelerator on your car) but once the speed of the engine has been set, the job of the governor is to maintain that speed despite the variations in load. In other words the governor controls the speed variation and keeps the speed within restrained limits despite these variations.see also here http://cr4.globalspec.com/thread/55716/How-does-an-electronic-speed-governor-workhttp://en.wikipedia.org/wiki/Governor_(device)

Don't you have the instruction leaflet that came with it, Mildred?