Introduction of the cautions for the use of potentiometers
日期：2025-08-21 17:49:44 点击：31
Lesen Electronics Factory editor tells everyone to use the following 9 aspects when using potentiometers.
Introduction of the cautions for the use of potentiometers
Potentiometers are relatively unfamiliar to the general public, but they are very common to people in the industry. Has a long history of development.As a variable resistor or voltage divider, the potentiometer is widely used. The potentiometer was first applied in the switch. With the change of technology, it is widely used in the aircraft model, automobile, remote control controller, volume control and other fields. Then, what needs to pay attention to when using potentiometers? Lesen Electronics Factory editor tells everyone to use the following 9 aspects when using potentiometers.
1. When installing or using a potentiometer, check that the potentiometer is of good quality. The potentiometer stem handle is flexible, elastic, and mechanical noise free. Then use a multimeter to check the nominal resistance value, which should be within the tolerance range to meet the requirements. If the multimeteris used to measure the minimum resistance and the maximum resistance of the potentiometer, rotate the potentiometer and rotate the arbor at the same time. Observe that the pointer of the multimeter is a bad jump phenomenon. If there is a jump phenomenon, this potentiometer is a bad product. The normal potentiometer is measuring. The pointer of the multimeter when resistance is a smooth stroke indication.
2. Some potentiometers are made of synthetic resins such as polycarbonate, so do not use them in environments where ammonia, amines, alkaline solutions, aromatic hydrocarbons, ketones, halogenated hydrocarbons and other chemicals are present in large concentrations. So as not to shorten the pot life.
3. For potentiometers with a grounding lug, the lug must be grounded to ensure safety, to prevent external disturbances affecting the performance of the whole set.
4.Can't use overload potentiometer must use the rated value. When the potentiometer is used as a varistor adjustment resistor, the allowable power consumption should be reduced in proportion to the stroke of the brush contacted by the movable contact so as to ensure that the passed current does not exceed the allowable rated resistance of the potentiometer and prevent the potentiometer from failing due to the load. In order to prevent the potentiometer resistance from adjusting near zero when the current exceeds the allowable maximum value, it is better to connect a current limiting resistor in series to prevent the potentiometer from overcurrent and damage.
5. The voltage generated when the current passes through the high resistance potentiometer must not exceed the maximum working voltage allowed by the potentiometer.
6. to prevent the potentiometer's contacts, conductive layer deterioration or burn, small resistance potentiometer operating current cannot exceed the maximum current allowed by the node.
7. The potentiometer must be firm and reliable during installation. The nut to be fastened should be tightened in place with enough torque to prevent loosening and displacement during the long-term use, and collision with other components can lead to circuit failure.
8. Variously adjustable potentiometers can be mounted directly on the printed circuit board, but attention should be paid to the arrangement of adjacent components to ensure that potentiometer adjustment is convenient without affecting adjacent components.
9. Unsealed potentiometers are most prone to noise failures, mainly due to oil contamination and wear. At this point, you must not use a lubricating oil to solve this problem. Lubrication can actually
increase the increase of internal dust and conductive particles. We should use the correct method to gently wipe the dirt on the resistor piece with a cotton ball containing anhydrous alcohol, and remove the oil from the contact brush and the lead reed.
Potentiometers are becoming more and more important in life, especially for designers or engineers. Mechanical potentiometers, digital potentiometers, adjustable potentiometers, PS4 rocker potentiometers have played a major role in different fields. For the use of potentiometers, it is necessary to understand its precautions, so that it can reduce the problems or obstacles in use.
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