1. The quality of potentiometers should be checked before use. The shaft handle of the potentiometer should be flexible and elastic, without mechanical noise. Checking the nominal resistance value with Multimeter should meet the requirements. If a multimeter is used to measure the resistance between the fixed end of the potentiometer and the wiring piece of the sliding end, the needle should rotate smoothly without jumping when the rotary shaft of the potentiometer is slowly rotated.

2. Because some parts of slide linear potentiometer are made of synthetic resins such as polycarbonate, so don't use them in the environment with high concentration of ammonia, amine, alkali solution and aromatic hydrocarbons, ketones, halogenated hydrocarbons and other chemicals to prolong the service life of potentiometers.

3. For the slide linear potentiometer with grounding soldering, the soldering plate must be grounded to prevent external interference.

4. Potentiometers should not be used in excess of load. They should be used in rated values. When the slide linear potentiometer is used as a rheostat to regulate the current, the allowable power consumption should be reduced in proportion to the stroke of the brush contacted by the dynamic contact, so as to ensure that the current flowing through does not exceed the allowable rating of the potentiometer and prevent the potentiometer from failing due to local overload.

In order to prevent the current exceeding the allowable maximum when the resistance of the potentiometer is adjusted close to zero, it is better to connect a current limiting resistor in series to avoid the potentiometer being damaged by overcurrent.

5. The voltage drop produced by a current flowing through a high resistance potentiometer shall not exceed the maximum operating voltage allowed by the linear rotary potentiometer.

6. In order to prevent the junction of potentiometer and conductive layer from deteriorating or burning out, the working current of the potentiometer with small resistance should not exceed the maximum current allowed by the junction.

7. Potentiometer must be firmly and reliably installed, and the fastened nut should be tightened in place with enough torque to prevent loosening and dislocation during long-term use and circuit failure caused by collision with other components.

8. Various micro-regulated potentiometers can be installed directly on the printed circuit board, but attention should be paid to the arrangement of adjacent components to ensure that the linear rotary potentiometer is easy to adjust without affecting adjacent components.

9. Non-sealed potentiometers are the most prone to noise failure, which is mainly due to oil and wear. At this point must not use lubricating oil to solve this problem, lubricating oil will increase the accumulation of internal dust and conductive particles. The correct treatment is to use a cotton ball dipped in anhydrous alcohol to gently wipe the dirt on the resistor, and remove the contact brush and oil stains on the reed.

10. Potentiometer seriously damaged need to replace the new potentiometer, at this time it is best to choose the same type and resistance as the original potentiometer potentiometer, but also should pay attention to the potentiometer shaft length and shaft end shape should match the original knob. If you can't find the prototype and the original resistance potentiometer, you can replace it with similar resistance and model potentiometer. Replacement potentiometer resistance allows a value-added change of 20% - 30%. Replacement potentiometer rated power should not be less than the original potentiometer rated power. In addition, the replacement linear rotary potentiometer should also meet the requirements in the circuit and in use.