This article discusses about Potentiometers, construction, working, its applications and also different types which include rotary and linear Potentiometer. Free Ebooks dc crompton potentiometer theory for download in PDF, MOBI, EPUB, HTML for Amazon Kindle and other Ebooks Readers. Potentiometers. Introduction. A Basic dc Potentiometer. Crompton’s dc Potentiometers. Applications of dc Potentiometers. AC Potentiometers.
|Published (Last):||7 May 2014|
|PDF File Size:||7.64 Mb|
|ePub File Size:||7.65 Mb|
|Price:||Free* [*Free Regsitration Required]|
A drop of 1. The other end of the galvanometer is in contact with the resistor via a sliding contact as shown in the figure above. The long slide wire is awkward, and even for the length shown cannot be read to a very great degree of precision. Also, a separate standard cell dial permits the operator to check the standard cell balance at any time during the course of measurement without disturbing the potentiometer setting. Single range potentiometer using independent calibrating circuit.
Digital Potentiojeter in Ambala. Reasonably rapid changes in galvanometer the indication can be followed with ease which is impossible to take with conventional potentiometers. The simplified diagram is shown below. This fixes the working current potentiimeter its proper value. In actual practice the resistance of the second dial is greater than that between two studs in the main first dial, so that the voltage drop across the second dial is greater than 0.
Product Description Our company is devotedly engaged in supplying a wide assortment of Crompton Potentiometer that is designed using the latest technology.
This potentiometer uses the Kelvin Varley arrangement shown below. The vernier crrompton reads to the increment of 0. The basic working principle of potentiometer is quite simple.
This means that current through the galvanometer will always be proportional to the out of balance current whatever may be the cromptonn of the main dials. The circuit of a single potentiometer may be modified in a simple way to add a second range, which is usually by a second factor, such as 0. If the new reading does not agree with the old one, the second measurement of unknown emf must be made. There is no slide wire. The negative battery terminals are connected together and positive battery terminals are also connected potenntiometer through a galvanometer as shown in the figure below.
Potentiometer Working Principle of Potentiometer
That means, emf of the standard cell is just balanced by the voltage appearing in the resistor across point A and B. Year of Establishment This instrument has two ranges: Pofentiometer, these products are widely used in diverse sectors such as laboratories, health care sector and medical institutions.
In this potentiometer, only one or two main dials, consisting of decade resistance boxes, are used. Rust proof body Durability Easy to operate Specification: Construction and Working of basic slide wire dc Potentiometers.
Crompton DC Potentiometer Calibration of PMMC Ammeter
This potentiometer is provided with a double throw switch which allows the connection of potentiometed the standard cell or the unknown emf to be applied to the working circuit. This does not mean, unfortunately, that small voltages can be read with assurance to cromptin. The standardising circuit may be checked for the constancy of working current, anytime during the measurements by simply throwing the switch S back to calibrate position.
The potentiometer is used to monitor the value of temperature where a thermocouple is employed.
Potentiometer Working Principle of Potentiometer
Provided in different specifications, this range is crlmpton for various medical and commercial applications. Brooks deflectional potentiometer is used for applications where the voltage to be measured is continuously changing, with a conventional type of potentiometersit becomes impossible to obtain exact balance even when the changes are slow since it is difficult to follow the changes by manipulation of the dials.
However, in this potentiometerthere are three measuring dials.
The dial settings are kept exactly the same as in potenhiometer original standardisation process. The above requirement means that the voltage E ac in above figure remains the same for both positions of range switch S.
The value of the unknown emf is obtained by adding the galvanometer reading to the main dial setting.
The standardisation should be again checked after the completion of the measurement. Get Best Price Request a quote.
DC Crompton’s Potentiometer or Laboratory Type Potentiometer
The two ranges are obtained by using two resistors R 1 and R 2 and a range selecting switch S. The figure below shows a separate standard cell dial incorporated in a single range potentiometer. This is how a potentiometer measures the voltage between two points here between A and Potentiometet without taking any current component from cromptonn circuit.
The below figure shows the schematic diagram of a duo-range two range potentiometer. When the range switch S is thrown to position x 0. Grab it now for very less price. The switch S is then thrown to the operate position and unknown emf is read by adjusting the measuring circuit dial and slide wire. Modern laboratory type potentiometers use calibrated dial resistors and a small circular wire of one or potntiometer turns, thereby reducing the size of the instrument.
This potentiometer is provided with an independent standardising circuit AD which can be set on any range of standard cell emf from 1.