Standard one, according to the requirements of the device and circuit chosen adjustable encoder types and specifications, and according to the requirement of the circuit and reasonable choice of adjustable encoder electrical parameters, including the rated power, nominal resistance, allowable deviation, resolution, high working voltage, noise, etc.
Standard two, according to the laws of the resistance changes to choose encoder of voltage regulation of power circuit, amplifying circuit working point adjustment, deputy brightness adjustment and line, field scanning signal conditioning encoder, all should use linear encoder.
Tone control of audio equipments should be chosen with encoder inversion of logarithmic type (
Encoder, the volume control with encoder can choose logarithmic type encoder.
Standard three, choose according to the requirement the encoder choose encoder, answer to choose according to the specific requirements of the application circuit of encoder in resistance material, structure, type, specification, control way.
High power circuit, for example, choose power lines around the encoder;
Precision instruments such as circuit should be chosen in the encoder, precision to high precision line around the encoder or metal glass glaze encoder;
The encoder, high frequency circuit can be used in carbon membranes;
Transistor radio volume and power switch can choose small with rotary encoder switch of carbon membranes;
The volume on the stereo audio amplifier can choose double coaxial encoder;
A sound system of tone control can choose straight slide type encoder;
Power circuit of the benchmark voltage regulation should choose fine-tuning encoder;
Communications equipment and computer used in the circle of encoder can choose patch type more encoder or lap encoder.