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Topic:Kt Kingtronics Tells You Trimming Potentiometers's Application Basics V
Content:
Selection CriteriaThe initial considerations for trimmer type selection are:A. Resolution of adjustmentB. Setability and time to setC. Physical and environmental conditionsD. Stability of setting requiredE. Circuit packaging requirementsD. Stability of SettingIt is highly desirable that once the trimmer has been set, it should remain at that setting independent of time, operating temperature changes, vibration, shock and humidity. This property of stability is largely a factor of the compatibility of the materials at the moving contact interface and the thermal matching of the elements of the trimmer structure. BI uses noble metals in both the wire brush contact and the cermet element. These materials are relatively soft, highly compatible and provide an excellent, low resistance, non-corroding interface. The contact drive structure and materials are chosen for their stability and compatibility. The high contact forces utilized at the brush/element interface reduce susceptibility to sh
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