Dec 05, 2019 measuring instruments are used for recording the data with respect to the time. Sep 11, 2018 10 measuring instruments and their uses in engineering workshop pdf by mohammed shafi september 11, 2018 april 5, 2020 measuring instruments plays a vital role in the engineering workshop. Micrometer heads with a mechanical or electronic digital display, which allow direct reading of a measurement value, are also available. The methods of measuring mechanical quantities are discussed subsequently, overing both the basic and derived quantities. Mechanical pressure gauges sika pressure gauges are quality measuring instruments for use in industrial applications. They are very reliable for static and stable conditions. Nptel mechanical engineering mechanical measurements and.
It is essential for displaying numerical values of the electrical quantities as per the time. For our measuring instruments we use latest sensors, tested in automotive applications millions of times over. Moritz gsi, darmstadt, germany abstract mechanical equipment is an integral part of each magnetic measurement. Also, gauges consume less time as compared to other measuring devices. Measuring tools and gauges 528 3 side view much larger scale. Nptel provides elearning through online web and video courses various streams. Measuring instruments and gauges are used to measure various parameters such as clearance, diameter, depth, ovality, trueness, etc. Least count of the vernier calliper is the difference between the values of main scale division and one vernier scale division. Ergonomically designed with new ip classification mechanical and electronic length measuring instruments for internal and external measurements inchgauges. The new generation of mechanical and electronic measuring gauges. Pdf mechanical measurements and metrology mechanical. 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. Mostly, the digital meter is used for an accurate reading. The operator can use gauge without having vast knowledge in operating those mechanical components.
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. Vernier calliper is one of the most used mechanical measuring tools onboard ship. Mechanical and other engineering measuring tools and instruments. Classification, absolute and secondary instruments, indicating instruments.
In this contribution the importance of mechanical tolerances is demonstrated with some examples and the principal rules in order to reduce the influence of mechanical errors are discussed. Mar 29, 2020 types of angular measuring instruments pdf by mohammed shafi march 29, 2020 april 1, 2020 angular measuring instruments are the devices that are used to measure the angle of the given specimens. Different types of mechanical measuring tools and gauges used. Electrical methods of indicating the output of detectors are more rapid than. Unit 5 linear measuring devices and linear measuring devices. Measurements will be of mainly length, mass, time, angle, temperature, squareness, roundness, roughness, parallelism etc. The least count of a measuring instrument is the smallest change in. Sika usa provides a broad selection of mechanical measuring instruments such as industrial thermometers, dial thermometers, pressure gauges and load cells. Electrical measuring instruments and their uses complete notes. Uprvunl isro sail ncl railway all exam iti mechanical trade live class 16 info trade technical classes 66 watching live now how to read micrometer. Vernier caliper is a widely used linear measurement instrument with a least count of 0.
I universal bevel protractor 1 it is an angular measuring instrument capable of measuring angles to within 5 min 2 the name universal refers to the capacity of the instrument to be adaptable to a great variety of work con gurations and angular interrelations. The measurement of flow in a plant is important for the control of the process and for troubleshooting problems that may occur. Least count value of one main scale division value of one vernier scale division. Double prismatic guide of 30 020 011 0 150 014 40 0. To the user of measuring instruments a knowledge of their construction and accuracy is. However, some physical laws were derived based on measurement results, such as the biotsavart law, when in 1820, the french scientists jeanbaptiste biot and felix savart established the relation. The very critical mechanical requirement is that the orientation of the probe head in front of a 4m long cantilevered beam must be stable within about 0. Important measuring instruments multiple choice questions. They are fitted with stainless steel cases as standard and comply with the en 8371 until en 8373 european standards. S bharadwaj reddy december 31, 2016 august 14, 2019. Electrical measuring instruments give an accurate and efficient reading for electrical equipment. Chapter 1 mechanical measurement presentation prepared by prof. It is basic that the measuring process inevitably alters the characteristics of both the source of the measured quantity and the measuring system itself, from which it must follow that there will always be some difference between the measured indication and the corresponding tobemeasured quantity. I probes may be mechanical, optical, laser, or white light, among others.
Some of the recent developments such as laserdoppler techniques, holography, have also been included. Here is some most commonly used mechanical instruments for measurement in industries. Length of jaws vernier type 30 020 vernier callipers with parallaxfree reading. Instrumentation and measurement in electrical engineering. Mem12003b perform precision mechanical measurement date this document was generated. They work without any kind of mechanical contact, consequently they are wearresistant, and theres absolutely no influence on the mechanics. Different types of measuring tools and gauges used on ships. Otherwise the main component would lead to a wrong measurement of the transverse component. Tutorials from indian institue of technology madras. In the field of magnetic measurements the mechanical equipment is mainly used for the positioning and. Measurement is done to know whether the component which has been manufactured is as per the requirements or not. It is used to measure linear dimensions like length. Nptel mechanical engineering mechanical measurements.
Methods of measurement based on agreed units and standards. It is basic that the measuring process inevitably alters the characteristics of both the source of the measured quantity and the measuring system itself, from which it. Plain gauge is defined as the dimension measuring or inspective tools, without a scale to measure any manufacturing part of tools. The meaning of instrumentation in engineering is the focus of operation and principle of measuring instruments used in configuration and design of. Mechanical measurements and metrology mechanical measurements and metrology 10me42b unit 3 comparators and angular measurement instructor. These are designed by our professionals using the highest grade of material to enable strength and high durability. Inspection and quality control in manufacturing prof. May 09, 2017 need of mechanical measurement basic definitions. The disadvantage is they are unable to respond rapidly to measurement of dynamic and transient conditions. There are various types of angular measurements which are based on various standards, and those are the following.
In this page you can learn various important measuring instruments multiple choice questions answers,mcq on electrical measuring instruments with answers,mcq on instrumentation and measurement,sloved electrical measuring instruments objective questions answers, instrumentation multiple choice questions answers etc. Classification of measuring instruments electrical measurements. Mechanical equipment is an integral part of each magnetic measurement. More concentration should on class room work and text book methodology. The movement is due to the difference between the standard and the actual dimension being checked the method for magnifying the small stylus movement in all the mechanical comparators is by means of levers, gear trains or combination of these. They are used to measure lengths and other geometrical parameters. Department of mechanical and industrial engineering. Units of measurement and their standards, which is concerned with the establishment, reproduction, conservation and transfer of units of measurement and their standards. The basic principle of linear measurement mechanical type is that of. Mechanical and electronic length measuring instruments for. This tool is one of the most famous measuring instruments in mechanical. Mar 09, 2016 introduction to mechanical measurement 1.