What Is 4 20 Ma Potentiometer?

Posted by divize on February 27th, 2019

A potentiometer is a resistor with three-terminal with a rotating contact or sliding which forms an adaptable voltage divider. If only two terminals are used, one end as well as the wiper, it acts as a variable resistor or rheostat.

The measuring tool called a potentiometer is essentially a voltage divider used for estimating electric potential (voltage); the segment is an implementation of a similar principle, hence its name.

4 20 Ma Potentiometer are commonly utilized to control electrical devices like volume controls on audio equipment. Potentiometers operated by a mechanism may be used as position transducers, for example, in a joystick.

Potentiometers are rarely utilised to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be similar to the power in the controlled load.

Today, potentiometers are much smaller as well as much more precise than those first large as well as large variable resistances, and as with most electronic components, there are many diverse types as well as names ranging from variable resistor, trimmer, preset, rheostat and of course variable potentiometer.

But whatever their name, these devices entire function in accurately the same way in that their output resistance value can be changed or varied by the movement of mechanical contact or wiper given by some external action.

The term potentiometer, as well as variable resistor, are often used together to represent the same component, but it is necessary to understand that the connections and operation of the two are different. However, both share the similar physical properties in that the two ends of an inner resistive track are brought out to contacts, in addition to a third contact connected to a transferable contact called the “wiper” or “slider”.

We provide a complete range of 4-20mA current loop simulators as well as 4 20ma Current Loop Tester. These items are developed to examination as well as commission 4-20 mA current loop systems. With a potentiometer, the existing in the loop is set manually ensuring verification of the loop as well as the tool attached.

The 4-20mA current loop simulators are preserved for improper connections. Also, the current is restricted, so there is no uncertainty of damage to the equipment that needs to be tested.

Variable resistors in whatever format, are usually associated with some form of control, whether that is regulating the volume of a radio, the speed of a vehicle, the frequency of an oscillator or precisely setting the calibration of a circuit, single-turn as well as multiple-turn potentiometers, trim-pots, as well as rheostats, find several uses in everyday electrical items.

The 4-20mA signal generators may be used to test 4-20mA analogue inputs on PLC as well as DCS systems. Also, I/P converters, PID controllers, as well as displays, may be tested.

The 4-20mA current loop controllers are passive, fitting for two wire connection. When a 24 Volt DC power supply is associated, the 4-20mA simulator may also be used for 4-wire connection testing.

Author Bio :DIVIZE is specialized in electronics for industrial automation, We offer the 4 20ma Current Loop Tester with valuable measurements in combustion control, protection, process quality, as well as environmental applications if you want to Buy 4 20 Ma Potentiometer visit: divize.com 

Original source : http://divize.over-blog.com/2019/02/what-is-4-20-ma-potentiometer.html

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