A trimmer is generally used in an electrical or electronic circuit for the purpose of providing minor
adjustments or calibrations. This implies that the trimmer is not used in the regular operation of the
circuit, but would be required to make initial and periodic adjustments to compensate for circuit
variables. This implies that the trimmer must be able to remain at its setting for long periods of time
without variation in setting or contact resistance.
For more products information please check: http://www.kingtronics.com/trimming-potentiometers/