Detection of the nominal resistance of the chip potentiometer: measurement, the first choice of the appropriate meter multimeter resistance range, the two table pen were connected to the fixed potential of the two chip potentiometer between the two fixed pins, the first measurement of chip linear position sensor potentiometer The total resistance is the same as the nominal resistance. If the measured resistance is infinite or greater than the nominal resistance, then the chip potentiometer has been open or variable value damage; Second, then the two table pen, respectively, SMD potentiometer center head and two fixed-side At either end, slowly turn the paddle potentiometer handle from one extreme position to the other extreme. Normal chip continuous turn potentiometer, multimeter meter needle resistance value should be from the nominal resistance (or 0 Europe) continuous change to 0 Europe (or nominal resistance). The whole process of rotation, hands need to change smoothly, and should not have any beating phenomenon. If in the process of adjusting the resistance value, the needle has a beating phenomenon, then the potentiometer there is a bad contact failure. Horizontal blue and white adjustable resistance detection method and the same.

The Function of Slide Adjustable Potentiometer

First, the sliding slide adjustable industrial potentiometer, one of the selected current output terminal for the sliding contact terminal, the sliding slide adjustable potentiometer can be used as a current controller.
Second, the potentiometer for the rheostat, the patch sliding adjustable potentiometer connected into two devices, the potentiometer range of travel can be obtained within a smooth continuous change in the resistance value, then the patch slide adjustable potentiometer played a rheostat .
Third, the patch sliding long life potentiometer is a continuously adjustable resistor, when adjusting the handle or handle, the moving contact will slide on the resistor body. The output voltage of the potentiometer and the arm angle or stroke of the movable arm can be obtained at the output end of the chip sliding adjustable potentiometer. This voltage is the patch sliding adjustable potentiometer in the process of its partial pressure

A carbon film tapped potentiometer is a resistance element having three lead terminals in which a fixed value of resistance is provided between two fixed terminals and the other end is slidable on the resistor body through a contact point. The resistance value of the wiper end and the fixed terminal varies depending on the position of the wiper Change. Carbon film potentiometer principle, features and uses are explained before.
Carbon film potentiometer application is quite broad, especially in some household appliances. There is a called the precision rotary potentiometer of the radio, that is, the potentiometer on the radio, it is a synthetic carbon film potentiometer, this potentiometer is by changing the position of the sliding end on the resistor body to obtain the strength of different new voltage To achieve the volume of the laying down regulation, generally with a control switch.

The role of potentiometer summed up for the following three points:

First, the control current: When the selected current output terminal is sliding contact terminal, the digital rotary potentiometer can be used to control the current.
The second role, the partial pressure: that is assigned to the partial voltage, when the potentiometer sliding or rotary handle to adjust the moving contact slip. The output of the potentiometer can be obtained with the potentiometer voltage and stroke into a certain relationship between the output voltage.
The third role: to change the resistance: When the potentiometer connected into two devices, the Linear Conductive Plastic Potentiometer in the stroke range can be a smooth continuous change in the resistance value, then the potentiometer is to play a role in changing the resistance.

The turns of the coil are bonded together by an adhesive

There are  types of potentiometers

that are used commonly: wire wound, carbon film and plastic film potentiometers. All these have been described below:
 Wire wound potentiometers: This potentiometer comprises of several rounds of wire wound around the shaft of the non-conducting material. The turns of the coil are bonded together by an adhesive. In this case the slider, connected to the body whose displacement is to be measured, moves on the potentiometer track and it makes contacts with successive turns of the coil. In this case the wire between the two successive turns is not covered by the slider, which limits the resolution of the wire wound potentiometers. However, the larger the number of turns of the coil, more is the resolution of the coil. The resolution is measured as the reciprocal of the number of turns of the coil. This devise has low noise and is mechanically rough and tough.

A standard potentiometer is a manually adjustable variable resistor with 3 terminals

A standard potentiometer is a manually adjustable variable resistor with 3 terminals. Two terminals are connected to both ends of a resistive element, and the third terminal connects to a sliding contact, called a wiper, moving over the resistive element. The position of the wiper determines the output voltage of the potentiometer. The high precision potentiometer

essentially functions as a variable voltage divider. The resistive element can be seen as two resistors in series(potentiometer resistance), where the wiper position determines the resistance ratio of the first resistor to the second resistor.
Types of potentiometers are also commonly known as a potmeter or pot. The most common form of potmeter is the single turn rotary potmeter. This type of pot is often used in audio volume control (logarithmic taper) as well as many other applications. Different materials are used to construct potentiometers, including carbon composition, cermet, wirewound, conductive plastic or metal film.