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To read a potentiometer, you need a multimeter. Put in on the proper ohmmeter setting, which should be higher than that of the resistance rating of the potentiometer as noted on the package or the device. If you don't know the resistance rating, use the lowest setting of the multimeter and increase it until you get a reading.
When reading the potentiometer, one multimeter lead must always be on the wiper or middle part, and the other one can be on either of the remaining terminals. For example, place one multimeter lead on the wiper, and the other on the left terminal of the potentiometer. If you place one lead on the left terminal and the other on the right, you will read the entire value of the pot, and the resistance will not vary when you turn the knob.
Note that Inexpensive ones may approximate only fifty percent of their rated value when they are measured.
we can offer all kinds of trimming potentiometers accept very small quantity with very competetive price, the delivery time is 2 weeks around. With our good support, our sales is keep increasing each month.Any questions ,please contact us at once.

Trimming Potentiometers come in different types.
Rotary and trimming potentiometers are wire wound, and are single or multi-turn, depending on the number of times the knob may be turned. The resistance is lowered or increased by turning the knob clock or counterclockwise, where the knob direction is dependent on the end that is used with the wiper.Faders or sliders as they are also known, have a rectangular shape, and the wiper moves back and forth in a linear fashion.
 
Potentiometers work by having a resistive element inside. Both end terminals are attached to it, and do not move. The wiper travels along the strip when the knob is turned. The closer the wiper is to the end terminal it is wired in conjunction with, the less the resistance, because the path of the current will be shorter. The further away it moves from the terminal, the greater the resistance will be.

The symbol for a potentiometer is the same one as a resistor, save for an arrow in the middle. In a circuit where they are used strictly as variable resistors or rheostats, only two terminals are wired to the other components. All three terminals are wired separately when they function as voltage dividers. Light dimmers in houses and volume controls on electronics are two common applications. Others include switches and position sensors.
 
Suntan Trimming Potentiometers selling keep increasing
Suntan can offer all kinds of Trimming Potentiometers, as below:TSR-3006 - Rectangular Trimming Potentiometers TSR-3323 - 7 Terminal Square Trimming Potentiometers TSR-3296 - 5 Terminal Square Trimming Potentiometers TSR-3362 - 9 Terminal Square Trimming Potentiometers TSR-3386 - 8 Terminal Square Trimming Potentiometers.
 

Suntan Trimming  potentiometer is an electrical component with a variable resistance.

In electrical engineering parlance, the term "potentiometer" is used in either one of two ways. It may refer to an instrument that measures an unknown emf or voltage by comparing it to a standard emf. In this capacity, it is functioning as a null instrument; it permits precision measurement by adjusting a value of a circuit element until a meter reads zero. Alternatively, "potentiometer" may refer to an electronic component that is used to vary resistance in a circuit.

A potentiometer is also referred to as a variable resistor or pot. They have three terminals, where the one in the middle is known as the wiper, and the other two are known as ends. The wiper is a movable contact where resistance is measured with respect to it and either one of the end terminals.

They are useful for circuits where the resistance needs to be dynamically changed to control the current. They are also popular as voltage dividers .

Suntan is a Hong Kong based manufacturer of Trimming Potentiometers of different types. Including SMD Trimming Potentiometers, Rectangular Trimming Potentiometers, Wirewould Trimming Potentiomers, Phenolic Trimming Potentiometers . Please refer to below product image  of Trimming Potentiometers.

Suntan offer full kinds of Trimming Potentiometer as below. Please check http://www.suntan.com.hk/Trimming-Potentiometers/ for data sheet freely.

TSR-3006 - Rectangular Trimming Potentiometer
TSR-3323 - 4 Terminal Square Trimming Potentiometer
TSR-3296 - 5 Terminal Square Trimming Potentiometer
TSR-3362 - 7 Terminal Square Trimming Potentiometer
TSR-3386 - 8 Terminal Square Trimming Potentiometer
TSR-3329 - Circularity Trimming Potentiometer
TSR-3266 - 5 Terminal Square Trimming Potentiometer
TSR-3318 - 6mm Phenolic Round Trimming Potentiometer
TSR-3306 - 6mm Cermet Round Trimming Potentiometer
TSR-3309 - 9mm Round Trimming Potentiometer
TSR-065 - Phenolic Trimming Potentiometer
TSR-3590 - Precision Multiturn Wirewound Potentiometer
TSR-105H - 6 Terminal Trimming Potentiometer
Delivery: 2 weeks
Packing information: 50pcs/ tube
MOQ: 500 pcs

SMD Trimmer Potentiometer Features

• Single-Turn/ Cermet/ Open Frame
• Recommended for reflow processing
• Rotor design compatible with automatic adjustment equipment
• Supplied in 8mm embossed tape, compatible with automatic Assembly equipment
• 3mm size m eets EIA/EIAJ standard trimmer footprint

SMD Trimmer Potentiometer Electrical Characteristics

• Standard Resistance Range 10Ω to 1MΩ
• Resistance Tolerance ±25%
• Adjustment Angle 220°C ± 20°C
• Residual Resistance =<1K, 20Ω>1K, 2%)

SMD Trimmer Potentiometer Pictures

Round Trimming Potentiometers Features

(Single Turn/ Cermet/ Industrial)
(2 Terminal S tyles)

Round Trimming Potentiometers Electrical Characteristics

Standard Resistance Range 10Ω - 2MΩ
Resistance Tolerance ±30% std
Absolute Minimum Resistance 1% max (≤2K=30Ω)
Contact Resistance Variation 3% max
Resistance Essentially infinite
Adjustment Angle 235° nom

Round Trimming Potentiometers Contact

Fax #: 852 8208 6246
Email : info@suntan.com.hk

Trimming potentiometers perform a variety of circuit adjustments in all types of electronic equipment. The variety of physical configurations available and the ability to withstand today's manufacturing environment offers the designer

flexibility in selecting the best trimmer for the application. Around the world, trimmers are used in virtually every electronic market.

Trimming Potentiometers is used by more and more products, its application including satellite receivers, modems, LCD displays, set-top boxes, and meters and instruments, as well as entertainment devices, such as cameras, and MP3 players...

we can accept very small quantity with very competetive price , the delivery time is 2 weeks around. With our good support , our sales is keep increasing each month.

Suntan can offer all kinds of Trimming Potentiometers, as below:

TSR-3006 - Rectangular Trimming Potentiometers
TSR-3323 - 7 Terminal Square Trimming Potentiometers
TSR-3296 - 5 Terminal Square Trimming Potentiometers
TSR-3362 - 9 Terminal Square Trimming Potentiometers
TSR-3386 - 8 Terminal Square Trimming Potentiometers
TSR-3329 - Circularity Trimming Potentiometers
TSR-3266 - 5 Terminal Square Trimming Potentiometers
TSR-3318 - 6mm Phenolic Round Trimming Potentiometers
TSR-3306 - 6mm Cermet Round Trimming Potentiometers
TSR-3309 - 9mm Round Trimming Potentiometers
TSR-065 - Phenolic Trimming Potentiometers
TSR-3590 - Precision Multiturn Wirewoud Potentiometer
TSR-105H - 6 Terminal Trimming Potentiometers

A Potentiometer with a power rating of (say) 0.5W will have a maximum voltage that can exist across the pot before the rating is exceeded.

All power ratings are with the entire resistance element in circuit, so maximum dissipation reduces as the resistance is reduced (assuming series or "two terminal" rheostat wiring).

Let's look at the 0.5W pot, and 10k is a good value to start with for explanation.
If the maximum dissipation is 0.5W and the resistance is 10k, then the maximum current that may flow through the entire resistance element is determined by ...

P = I² R ... therefore
I =P / R ... so I = 7mA

In fact, 7mA is the maximum current that can flow in any part of the resistance element, so if the 10k pot were set to a resistance of 1k, current is still 7mA, and maximum power is now only 50mW, and not the 500mW we had before.

A potentiometer is an adjustable resistor. This is why some customers called potentiometer variable resistor. Resistor include fixed resistor and variable resistor. Variable resister (potentiometer) belongs to passive components. A potentiometer is constructed using resistive element comprising an arc of a circle and a sliding contact (wiper) travelling over that arc.

Trimmers come in a variety of sizes and levels of precision; for example, multi-turn trim potentiometers exist, in which it takes several turns of the adjustment screw to reach the end value, allowing for very high degrees of accuracy. Our Suntan has many types of Trimming Potentiometers ,for example TSR-3006  TSR-C3305 and so on ,these products is for our Suntan mark ,you can set your heart at rest ,we can guarantee our quality . f you have any questions please contact us, we can try our best to meet your requirements. For our website: www.suntan.com.hk  .You can find your best answer.