The maximum operating voltage of the fine trimmer potentiometer:

The maximum operating voltage of the trimmer potentiometer is the maximum operating voltage allowed to withstand by the trimmer potentiometer which works reliably for a long time without damage under specified conditions, also known as rated working voltage.

The actual working voltage of the trimmer potentiometer is less than the rated working voltage. If the actual working voltage is higher than the rated working voltage, the power of the trimmer potentiometer will exceed the rated power, which will lead to the overheating damage of the trimmer potentiometer.

The dynamic noise of the trimmer potentiometer:

When the dynamic contact point of the trimmer potentiometer slides on the resistor under the action of applied voltage, the electric noise generated is called the dynamic noise of the trimmer potentiometer. Dynamic noise is one of the main parameters of sliding noise. The magnitude of dynamic noise is related to the speed of rotating shaft, the contact resistance between contact point and resistor body, the non-uniform change of resistivity of resistor body, the number of dynamic contact points and the magnitude of applied voltage.

The resolution of the  trimmer potentiometer :

The resolution of the trimmer potentiometer is also called resolution. For the wire-wound trimmer potentiometer, the output voltage changes discontinuously every time the moving contact moves. The ratio of the change to the output voltage is resolution. The theoretical resolution of linear wire-wound trimmer potentiometer is the reciprocal of the total winding turns N and expressed in percentage. The higher the total turns of the trimmer potentiometer, the higher the resolution.