In old days the production was on a small scale, different component parts were made. Vernier caliper is a widely used linear measurement instrument with a least count of 0. Each measuring instrument serves a specific purpose for the person who is using it. To the user of measuring instruments a knowledge of their construction and accuracy is a matter. In the past, a common time measuring instrument was the sundial. It is essential for displaying numerical values of the electrical quantities as per the time.
Electrical measuring instruments physics libretexts. The 10 measuring instruments and their uses are presented below. Measurement is an important part of science, construction, art, design and a wide array of other professional fields. Also, gauges consume less time as compared to other measuring devices. The matter presented here is prepared by the author for their respective teaching assignments by referring the text books and reference books. That is why the best measuring instruments are necessary. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical. The distance between the jaws is then read in different ways for the. Classification of measuring instruments instrumentation. Electrical instruments measure the various electrical quantities like electrical power factor, power, voltage and. Tech 101 how to use measuring tools jim oclair on aug 9th. Mostly, the digital meter is used for an accurate reading.
The objective of this section is to enable the trainee to. A mechanical pressuremeasuring instrument used to measure pressure above or below the atmospheric pressure. An astonishing array of devices and tools allow humans to measure just about everything, including calculating travel distances, determining a boards length in construction, ascertaining air and water temperatures, analyzing wind speed, gauging the pressure inside a tire and measuring the distance around the globe. The instruments used to measure the physical and electrical quantities are known as measuring instruments.
An instrument used in aircrafts for measuring altitudes. The science which is dealing with measurements and their conditions is called measurement science or metrology in this article, we will discuss methods, standards, and instruments for linear measurements but before that, we should. Download as docx, pdf, txt or read online from scribd. Stop watches are also used to measure time in some sports. Mechanical and other engineering measuring tools and instruments. Primitive peoples needed measuring to perform tasks such as building dwellings, fashioning clothing and interchanging food. Mar 15, 2020 basically there are three types of measuring instruments and they are electrical measuring instruments mechanical measuring instruments. Chapter 1 mechanical measurement presentation prepared by prof. Measuring centres 7 use the mc 740 multifunction meter is used for monitoring and measuring electrical quantities of a threephase electricenergy distribution system. Humans employ multiple tools to measure their worlds. From height and depth, to width and breadth, theres a measurement tool for most everything. These are designed by our professionals using the highest grade of material to enable strength and high durability.
The term has its origins in the art and science of scientific instrumentmaking instrumentation can refer to devices as simple as directreading thermometers, or as complex as multisensor components of industrial control systems. This is the complete explanation of t he 10 measuring instruments and their uses in a detailed way. For example, a water pressure gauge will tell you the amount of pressure coming out of. How do we study the weather meteorologists study the weather by recording and looking at their data they collect data by using different weather instruments thermometer, barometer, hygrometer, and. List of equipmentsmachines mechanical engineering department fluid mechanics and hydraulic machines lab sr. It requires external scale to compare the measured value. Different types of mechanical measuring tools and gauges used. Learn about different types of mechanical tools and gauges used on ships. Ohms law and kirchhoffs method are useful to analyze and design electrical circuits, providing you with the voltages across, the current through, and the resistance of the components that compose the circuit. Units of measurement and their standards, which is concerned with the establishment, reproduction, conservation and transfer of units of measurement and their standards.
The meter is provided with 32 program adjustable alarms, up to four inputs or outputs and. Dec 05, 2016 name of important measuring devices and their uses. I probes may be mechanical, optical, laser, or white light, among others. Dec 14, 2011 good blog thanks for sharing this types of valuable information. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of realworld objects and events. Even it can be defined as the accuracy of measurements. Principles and methods of temperature measurement course content temperature can be measured via a diverse array of sensors. Measuring and measuring tools the accuracy of any measuring device depends on the user as much as on the design of the tool. Plain gauge is defined as the dimension measuring or inspective tools, without a scale to measure any manufacturing part of tools. Pressure gauges measure the pressure of water and air. Pressure gauges are a really common and crucial measuring tool. In this post we will discuss about classification of electrical instruments. Jul 20, 2014 electrical measuring instruments definitions, types.
Absolute instrument measures the process variable directly from the process without the use of conversion. Measuring instruments and gauges are used to measure various parameters such as clearance, diameter, depth, ovality, trueness etc. To accurately cook meals from scratch requires the use of small scales. With a need to make quality products which meet design specified tolerances, a large number of firms, research and development centers, and school and college laboratories use measuring instruments that have high accuracy and precision. Sep 11, 2018 this is the complete explanation of t he 10 measuring instruments and their uses in a detailed way. Classification of measuring instruments the instrument used for measuring the physical and electrical quantities is known as the measuring instrument.
They are handy for measuring piston or crankshaft journal size, disc. Rulers are used to measure length, as are meter sticks and yardsticks. To measure these parameters require instruments, and these instruments are described in this section. In addition to weights and lengths, primitive societies also needed to measure the volume of liquids and the passing of time. A sundial represents one of the earliest devices used to measure the suns position in the sky, until inventors created the first clocks, which measure the passing of time. Equipmentsmachines quantity 1 orifice and mouthpiece apparatus 1 2 notch tank apparatus 1 3 jet on vane apparatus 1 4 combined pipe friction measurement apparatus 1 5 venturimeter and orificemeter apparatus 1. The measuring instruments may be classified as follows. Blueprints are exact copies of mechanical or other types of drawings and employ a language of their own. Electrical measuring instruments give an accurate and efficient reading for electrical equipment. A ruler can be used to draw straight lines but there is no quarranty that the line drawn is accurate and.
Some of the modern surveying instruments are discussed in this article. Modern surveying instruments and their uses in civil. A part from the measuring instruments used in workshop, i will discuss a few types of instruments used in production labs also. These types of gauges are used in many different things, and you will find that owning one will come in handy. More concentration should on class room work and text book methodology.
Measuring instruments, measurement instruments, test equipment, measuring tools, measurement, hand held equipment like thermometers, tachometers. The magnitude of one of the quantity is unknown, and it is compared with the predefined value. Types of micrometer the names are based on their application. Care is needed when taking a reading from a mechanical micrometer. As this type of encoder can drive with less power than the incremental encoder, the battery. The term measurement means the comparison between the two quantities of the same unit. Exact measurement is an absolute must for everyone who wants to guarantee precise and firstclass work. Electrical measuring instruments definitions, types. The main scale and the vernier scale that can slide along the main scale. These tools measure important engineering parameters which describes the condition of the working machinery. Classification of electrical instruments electrical tutorials.
Different types of measuring tools and gauges used on ships. The visual means of level measurement previously discussed are rivaled in simplicity and dependability by float type measurement devices. Our offered mechanical measuring instruments feature a set of various tools which are widely used for measuring purpose and feature perfection and an unmatched accuracy. Types of precision measuring instruments used in industry. Many forms of float type instruments are available, but each uses the principle of a buoyant element that floats on the surface of. We offer a broad range of products from the field of measuring instruments. All of them infer temperature by sensing some change in a physical characteristic. Methods of measurement based on agreed units and standards. In that time, body parts such as arms and feet were often used as measuring instruments. Used for measuring angular distance between two objects. Different types of mechanical measuring tools and gauges used on ships. Electrical measuring instruments types accuracy precision.
Here we are interested in electrical measuring instruments so we will discuss about them in detail. Tech 101 how to use measuring tools hemmings daily. Today, the usual measuring instruments for time are clocks and watches. Graduates in electrical or mechanical engineering or any of the physical sciences are taught the essential disciplines of measurement science to enable them to design electronic measuring. A measuring instrument is a device for measuring a physical quantity. Double prismatic guide of 30 020 011 0 150 014 40 0. At the moment we provide about 500 different types and models of high quality measuring instruments to do tests and analysis of various physical, electrical, chemical and other parameters. The operator can use gauge without having vast knowledge in operating those mechanical components. Classification of measuring instruments instrumentation and. Micrometers usually come in pairs or in sets with several measured rods included to increase their range. Ramkumar department of mechanical engineering iit kanpur. Classification of measuring instruments circuit globe. For highly accurate measurement of time an atomic clock is used. Hi aspirants, scientific instruments are part of laboratory equipment, but are considered more sophisticated and more specialized than other measuring instruments as scales, meter sticks, chronometers, thermometers or even power or waveform generators.
Classification of electrical instruments electrical. Electrical measuring instruments and their uses complete. Metrology is defined as the science of measurements or the precision of measurements. Mar 09, 2016 introduction to mechanical measurement 1. This may not be as simple to use as some of the other measurement tools due to the way that you have to read it, but it does work quite well. Measurement devices come in all shapes, sizes and types. In the next two sections i will show you examples of mechanical equipment that have been built in the laboratories depending on the task that had to be done, i. Accurate to within several thousandths, micrometers are an essential tool for machinists and engineers. These encoders are widely used in a variety of measuring instruments as the length. Different types of mechanical measuring tools and gauges used on. There are a few measuring instruments that are more commonly seen than. Name of important measuring devices and their uses.
Rulers are used extensively in design labs and classrooms, while meter and yardsticks are more commonly used for. A diaphragm pressure gauge, in its simplest form, consists of a corrugated diaphragm as shown in the figure. The devise that is used for measurement of certain physical quantity is called as measuring instrument. It is basic instrument of measurement, consist of two types of scale. A mechanical pressure measuring instrument used to measure pressure above or below the atmospheric pressure. It is used to measure linear dimensions like length, diameter, depth. It is usually employed to measure relatively low pressures. Jan 20, 2020 ohms law and kirchhoffs method are useful to analyze and design electrical circuits, providing you with the voltages across, the current through, and the resistance of the components that compose the circuit.
With modern surveying instruments, survey work will be precise, faster and less tedious. There are a few measuring instruments that are more commonly seen than others. The measuring instruments are used frequently in our daytoday life for the measurement of various quantities like length, weight, temperature, pressure, current, voltage etc. Mechanical instruments and tools tools metalworking scribd.
Hysteresis linearity resolution of measuring instruments threshold drift zero stability loading effect system response measurement methods generalized measurement system static performance chapter 01 mechanical measurement 3 hours 7% weightage approx. Measuring is not only checking the length, width or thickness of an objects but also checking of the shape things like the flatness, straightness, roundness or squareness. But before proceeding further, it good to refresh the definitions and terms used in measurements, instruments. Electrical measuring instruments and their uses complete notes. Following are the modern surveying instruments which are used for surveying. There are four basic types of temperature measuring devices, each of which uses a different principle. Measuring instruments are used for recording the data with respect to the time. The least count of a measuring instrument is the smallest change in the measured quantity that can be resolved on the instrument s scale. Different precision measuring tools are present in ship such as vernier. Important measuring devices and uses, types of measuring. Common maintenance tools and their uses tools are designed to make a job easier and enable.
Blueprints are exact copies of mechanical or other types of drawings and employ a. In the field of magnetic measurements the mechanical equipment is mainly used for the. In appendix 1 you will find a incomplete list of the most important mechanical components. Measuring tools and gauges 528 3 side view much larger scale.
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