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Operation notes and testing analysis of Bourns potentiometer
Date：2018-08-30
Views：440
Bourns potential has a wide range of applications, such as photocopiers, heaters, environmental control switches, navigators, intelligent home appliances control board and household appliances, communications, instrumentation, digital technology, medical equipment and other high-tech products. The wide application is also closely related to the Bourns potentiometer connection. In order to use bourns potentiometer safely and rationally, today's edition will introduce how to detect Bourns potentiometer and the matters needing attention in operation.
Points for attention in operation of Bourns potentiometer
1. When bourns potentiometer installs the "rotary" potentiometer to fix the nut, the strength should not be too tight to avoid destroying the screw teeth or poor rotation; when installing the "iron shell straight sliding" potentiometer, the use of excessive long screws should be avoided, otherwise the motion of the sliding handle may be hindered, and even the potentiometer itself may be directly damaged.
2. In order to prevent insulation deterioration or short circuit, the surface of Bourns potentiometer can not have water mist or water droplets, can not be used in humid places.
3. If the terminal of the bourns potentiometer is not too high during welding, the time should not be too long. Otherwise, it may cause damage to its potentiometer.
4. Poor soldering may lead to poor contact or circuit breakage, and the terminals of Bourns potentiometers should avoid the use of water-capacitive flux and inferior flux, otherwise metal oxidation and moldy materials will be caused.
5. Because the contact resistance between the resistance and the contact sheet is not conducive to the passage of large current, the Bourns potentiometer is best used in the voltage adjustment structure, and the connection mode should be selected "1" foot grounding, while avoiding the use of current adjustment structure.
6. In order not to cause bad contact between brush and resistor, noise, INT and other undesirable phenomena, Bourns potentiometer welding, flux into the printing board to adjust the height of the appropriate, while avoiding flux intrusion potentiometer.
7. Because most of the resistors of bourns potentiometer are made of polycarbonate synthetic resins, Bourns potentiometers should avoid contact with ammonia, alkaline aqueous solution, aromatic hydrocarbons, hydrocarbons of lipids, ketones, other amines, strong chemicals (high acid-base value), etc.
Detection of Bourns potentiometer
1. Resistance detection, when the shaft handle of the bourns 3296 potentiometer is rotated to the extreme position counterclockwise and clockwise, the resistance value should be close to the nominal value and zero of the Bourns potentiometer, and the smaller the position from zero, the better, and vice versa.
2. It is very simple to test, like most other electronic components, that is to see the appearance, for Bourns potentiometer we should pay attention to its appearance should be flexible rotation axis, clear marking, appropriate elasticity, no rust solder or pin, when rotating smoothly, no mechanical noise and jitter; at the same time bourns 3296 potentiometer should be noted that The rotary handle of the RNS potentiometer should rotate smoothly, and the potentiometer should not loosen when the solder pad or pin is gently shaken by hand.
3. Inspecting the internal structure of bourns 3296 potentiometer, we can use the multimeter to inspect the internal structure. We first pull the resistance block of the multimeter to a certain range, then zero. Then the two ends are connected to the two ends of the potentiometer respectively, so that the actual resistance can be measured. Then the actual resistance is compared with the nominal resistance of the potentiometer. If there is no difference, the Bourns potential is intact. If there are many differences, the Bourns potentiometer is broken.
Points for attention in operation of Bourns potentiometer
1. When bourns potentiometer installs the "rotary" potentiometer to fix the nut, the strength should not be too tight to avoid destroying the screw teeth or poor rotation; when installing the "iron shell straight sliding" potentiometer, the use of excessive long screws should be avoided, otherwise the motion of the sliding handle may be hindered, and even the potentiometer itself may be directly damaged.
2. In order to prevent insulation deterioration or short circuit, the surface of Bourns potentiometer can not have water mist or water droplets, can not be used in humid places.
3. If the terminal of the bourns potentiometer is not too high during welding, the time should not be too long. Otherwise, it may cause damage to its potentiometer.
4. Poor soldering may lead to poor contact or circuit breakage, and the terminals of Bourns potentiometers should avoid the use of water-capacitive flux and inferior flux, otherwise metal oxidation and moldy materials will be caused.
5. Because the contact resistance between the resistance and the contact sheet is not conducive to the passage of large current, the Bourns potentiometer is best used in the voltage adjustment structure, and the connection mode should be selected "1" foot grounding, while avoiding the use of current adjustment structure.
6. In order not to cause bad contact between brush and resistor, noise, INT and other undesirable phenomena, Bourns potentiometer welding, flux into the printing board to adjust the height of the appropriate, while avoiding flux intrusion potentiometer.
7. Because most of the resistors of bourns potentiometer are made of polycarbonate synthetic resins, Bourns potentiometers should avoid contact with ammonia, alkaline aqueous solution, aromatic hydrocarbons, hydrocarbons of lipids, ketones, other amines, strong chemicals (high acid-base value), etc.
Detection of Bourns potentiometer
1. Resistance detection, when the shaft handle of the bourns 3296 potentiometer is rotated to the extreme position counterclockwise and clockwise, the resistance value should be close to the nominal value and zero of the Bourns potentiometer, and the smaller the position from zero, the better, and vice versa.
2. It is very simple to test, like most other electronic components, that is to see the appearance, for Bourns potentiometer we should pay attention to its appearance should be flexible rotation axis, clear marking, appropriate elasticity, no rust solder or pin, when rotating smoothly, no mechanical noise and jitter; at the same time bourns 3296 potentiometer should be noted that The rotary handle of the RNS potentiometer should rotate smoothly, and the potentiometer should not loosen when the solder pad or pin is gently shaken by hand.
3. Inspecting the internal structure of bourns 3296 potentiometer, we can use the multimeter to inspect the internal structure. We first pull the resistance block of the multimeter to a certain range, then zero. Then the two ends are connected to the two ends of the potentiometer respectively, so that the actual resistance can be measured. Then the actual resistance is compared with the nominal resistance of the potentiometer. If there is no difference, the Bourns potential is intact. If there are many differences, the Bourns potentiometer is broken.