Tester

November 1, 2021

The tester is an instrument that will allow you to make measurements of different electrical parameters , you should also know that another name of this device is a multimeter.

It is a conglomerate of internal instruments, which allows it to have that multifunctional character to be able to make all electrical measurements.

Next, I will comment on other aspects of great interest about the tester, so that you can understand how it works and why it is so used in so many industrial and laboratory sectors worldwide.

What is a Tester?

The tester is also known by the name of multimeter and multimeter. Well, it is an instrument that has the ability to measure passive and active electrical parameters, summarizing the function of three important instruments, such as: Ohmmeter, Ammeter and Voltmeter.

In addition, it is to be expected that its functionality in terms of electrical measurement was dual, since it works with both alternating and direct current , making it ideal for different electrical circuits.

In order to fulfill all its functions, the tester works with an internal galvanometer, which allows it to make measurements by connecting to a circuit and using the rotation of the coil.

This instrument is one of the most used by electricians , given its versatility and the amount of measurement magnitudes it encompasses, since it is a set of several instruments.

What is a Tester for?

The tester is an instrument that measures passive and active electrical parameters, using a galvanometer inside. In general, it focuses on doing the following functions:

  • You can measure the current , that is, its intensity either in direct or alternating current, using its tips within the circuit, to later demonstrate the results obtained in amperes.
  • You can measure the voltage or voltage of the alternating and direct current, in this case the tester tips will touch the ends, to determine the volts that circulate in the circuit.
  • You can measure if there is an established electrical continuity , because when placing the tips at the ends, the tester will emit a sound to warn if there is continuity.
  • By having the qualities of an ohmmeter, the tester is able to measure the resistance of a circuit , based on the number of Ohms in each isolated section.

Other functions of the tester are related to the measurement of capacitance and frequency in a given circuit, as well as being able to identify if there is alternating current in a given situation.

How does a Tester work?

Despite being an instrument that encompasses many principles, the reality is that the tester has an operating mechanism and an extremely simple way of using it.

The tester has inside a galvanometer that allows it to fulfill all its functions, which is made up of a coil and a magnet.

The coil rotates between the different poles that the magnet has, each time it passes through a current, thus producing an electrodynamic force, which causes the coil to rotate even more and in turn drives a needle to mark on the measurement scale or send a signal, to be displayed digitally on the screen.

To use the tester, what you have to do is first determine which of the variables I want to measure, then connect the leads in the multimeter and into the circuit. On the device, the switch is rolled until the magnitude is indicated, it turns on and is expected to reflect the results on the screen.

Uses of the Tester

The tester has a universal application, it can be used in our homes as well as in large industrial complexes, thanks to its multifunctional nature.

The uses of the tester are dedicated to the field of electricity , which is why I am talking about universality, since electricity is present in every sector worldwide.

It is the main ally of electricians to be able to do their work, both in houses, buildings, national electricity system, among others, since it can know all these variables, in order to ensure better jobs.

In the industries it is an essential piece, as it allows to control all the electrical aspects in its production , to verify the state of the current in the complex to improve or ensure the correct operation of its machinery.

Additionally, you should know that in laboratories, it also has considerable applicability, especially in those for the area of ​​physics, electricity and electronics. Well, it allows testing all the values ​​in the circuits that are being recreated, in order to study the different properties.

Tester types

The tester has a very general classification , based on the way it marks the results obtained, in itself, its internal functioning is the same in all existing testers. The types of tester are as follows:

  • Analog tester

It is that tester that the results are shown in a needle marking . In other words, the force generated by the coil and the magnet will drive a needle and it will move according to the intensity of the received signals. It was the first tester model to go out into the world.

  • Tests digitally

In this case, this type of tester is technological , since it translates those analog signals with a circuit, to be able to display them digitally on a screen. This increases precision, as we know that needles often have a minimal margin of error and lend themselves to errors in reading.

  • Advanced testers

This type of tester will be mixed with other instruments or devices to cover a greater number of functions . That growth will depend on the needs as they are specialized models, to fulfill tasks within specialized sites.

In short, the tester is a clear example that sometimes what seems very complex is really simple, because what is sought with these instruments is to simplify life.

Tester Features

The tester is a unique tool that has a large number of features that have won the hearts of everyone who works with electricity. Being the main properties:

  • Its main operating mechanism is offered by the galvanometer.
  • In analog testers the scale reaches a limit, which determines the maximum capacity that this instrument has.
  • It has in the digital model, a led screen that will tell you only the measurement of that parameter, because in the case of analog, on its screen you will have all the scales and you have to see the one related to the measurement.
  • The cables for the connection or terminals have a color code that allows you to determine exactly where they must be placed, so that the tester can work.
  • The tester works with magnetic, electrical and electrodynamic forces throughout your system.
  • It is applicable in both direct current and alternating current circuits .
  • The active electrical quantities that it works with are current and voltage. On the other hand, the passive ones are resistance, capacity and others.

The main feature is its multifunction, as it can measure almost all existing electrical parameters.

Importance of the Tester

The importance of the Tester lies in all the number of functions it has and how it has been used by the world, to be able to advance in electrical matters and control all these variables.

From simple experiments in high school laboratories, to its uses in industrial complexes and specialized physical laboratories, the tester is a tool that has changed the world since its appearance because in these spaces, it is in a constant research process to be able to evolve in the matter , which we can verify with the specialization that it has reached in order to provide more precision and safety in electrical circuits.

Definitely, I invite you to know and use this instrument, because it has many benefits, applications and functionalities, with which you can simplify many aspects at work or in your day-to-day life.

History of the Tester

The whole history of the tester begins in a post office, when a worker from a courier company named Donald MacAdie, in order to reduce the amount of instruments that he always had to carry to do his jobs, set out to create a device capable of encompassing , both the ohmmeter, multimeter and ammeter .

In order to make his creation, MacAdie observed that both elements shared common characteristics in the internal functioning, then, he merged all the concepts, in what would be the first tester in the world, which he called AVO.

The AVO reached the world market in 1923, although it had the peculiarity of only measuring in direct current, which inspired other people to evolve this device, releasing new models.

The AVO was marketed for more than 50 years, today it is not available to buy since it has been replaced by the new models, loaded with 21st century technology.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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