Precautions for use: 1. The resistors of potentiometers are mostly made of synthetic resins containing polycarbonates. Contact with the following items should be avoided: ammonia, other amines, alkaline aqueous solutions, aromatic hydrocarbons, ketones, lipid hydrocarbons, strong chemicals (with high pH), etc. Otherwise, their performance may be affected. 2. When welding the terminals of potentiometers, it is necessary to avoid using water-based flux, otherwise it will promote metal oxidation and material mold; Avoid using inferior soldering flux, as poor soldering may cause difficulty in soldering, resulting in poor contact or open circuit. 3. If the welding temperature of the potentiometer terminal is too high or the welding time is too long, it may cause damage to the potentiometer. When soldering pin type terminals, it should be completed within 3 seconds at 235 ℃± 5 ℃. The soldering should be at least 1.5mm away from the potentiometer body. Do not use solder flow to pass through the circuit board during soldering; The welding of wire terminal should be completed within 3 seconds at 350 ℃± 10 ℃. And the terminal should avoid heavy pressure, otherwise it may cause poor contact. 4. When welding, the height of rosin (flux) entering the printing machine board should be adjusted appropriately to avoid flux intrusion into the potentiometer, otherwise it will cause poor contact between the brush and the resistor body, resulting in INT and noise. 5. Potentiometers are best used for voltage adjustment structures, and the wiring method should choose to ground the "1" pin; The use of current adjustment structures should be avoided, as the contact resistance between the resistor and the contact piece is not conducive to the passage of large currents. 6. The surface of the potentiometer should avoid condensation or the presence of water droplets, and avoid using it in damp places to prevent insulation deterioration or short circuits. 7. When installing a "rotary" potentiometer and fixing the nut, the strength should not be too tight to avoid damaging the screw teeth or poor rotation; When installing the "iron shell direct sliding" potentiometer, avoid using excessively long screws, otherwise it may hinder the movement of the sliding handle and even directly damage the potentiometer itself. 8. During the process of installing the knob on the potentiometer, the thrust used should not be too large (it should not exceed the parameter index of the shaft's push and pull force in the "Specification"), otherwise it may cause damage to the potentiometer. 9. The rotary operating force (rotation or sliding) of the potentiometer will become lighter as the temperature increases and tighter as the temperature decreases. If the potentiometer is used in a low-temperature environment, it is necessary to explain in order to use a specially designed low-temperature resistant grease. 10. The shaft or sliding handle of the potentiometer should be designed as short as possible. The shorter the length of the shaft or sliding handle, the better and more stable the feel. On the contrary, the longer the shaking, the greater the sensation. 11. The power of the carbon film of the potentiometer can withstand the surrounding temperature of 70 ℃, and its power may be lost when used above 70 ℃