Plain gauge is defined as the dimension measuring or inspective tools, without a scale to measure any manufacturing part of tools. The methods of measuring mechanical quantities are discussed subsequently, overing both the basic and derived quantities. Mechanical and electronic length measuring instruments for. The new generation of mechanical and electronic measuring gauges. In the field of magnetic measurements the mechanical equipment is mainly used for the positioning and. This tool is one of the most famous measuring instruments in mechanical.
Mechanical engineering measuring instruments answers. Nptel mechanical engineering mechanical measurements and. Length of jaws vernier type 30 020 vernier callipers with parallaxfree reading. 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. Mechanical measurements and metrology mechanical measurements and metrology 10me42b unit 3 comparators and angular measurement instructor. Methods of measurement based on agreed units and standards. Moritz gsi, darmstadt, germany abstract mechanical equipment is an integral part of each magnetic measurement. Measurements will be of mainly length, mass, time, angle, temperature, squareness, roundness, roughness, parallelism etc. 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. Least count of the vernier calliper is the difference between the values of main scale division and one vernier scale division.
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. Also, gauges consume less time as compared to other measuring devices. There are various types of angular measurements which are based on various standards, and those are the following. Mechanical equipment is an integral part of each magnetic measurement. It is used to measure linear dimensions like length.
The operator can use gauge without having vast knowledge in operating those mechanical components. Vernier caliper is a widely used linear measurement instrument with a least count of 0. The least count of a measuring instrument is the smallest change in. Nptel provides elearning through online web and video courses various streams. For our measuring instruments we use latest sensors, tested in automotive applications millions of times over. S bharadwaj reddy december 31, 2016 august 14, 2019. 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. It is essential for displaying numerical values of the electrical quantities as per the time. Mem12003b perform precision mechanical measurement date this document was generated. The disadvantage is they are unable to respond rapidly to measurement of dynamic and transient conditions. 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. Ergonomically designed with new ip classification mechanical and electronic length measuring instruments for internal and external measurements inchgauges.
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. 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. Electrical methods of indicating the output of detectors are more rapid than. They are very reliable for static and stable conditions. Measuring tools and gauges 528 3 side view much larger scale. Department of mechanical and industrial engineering. Instrumentation and measurement in electrical engineering. 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. Chapter 1 mechanical measurement presentation prepared by prof. The meaning of instrumentation in engineering is the focus of operation and principle of measuring instruments used in configuration and design of. The basic principle of linear measurement mechanical type is that of. Here is some most commonly used mechanical instruments for measurement in industries. May 09, 2017 need of mechanical measurement basic definitions. Nptel mechanical engineering mechanical measurements.
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. Electrical measuring instruments give an accurate and efficient reading for electrical equipment. Classification, absolute and secondary instruments, indicating instruments. Some of the recent developments such as laserdoppler techniques, holography, have also been included.
Pdf mechanical measurements and metrology mechanical. Mechanical pressure gauges sika pressure gauges are quality measuring instruments for use in industrial applications. Double prismatic guide of 30 020 011 0 150 014 40 0. Dec 05, 2019 measuring instruments are used for recording the data with respect to the time. Inspection and quality control in manufacturing prof.
I probes may be mechanical, optical, laser, or white light, among others. 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. Different types of measuring tools and gauges used on ships. Mechanical and other engineering measuring tools and instruments. Unit 5 linear measuring devices and linear measuring devices. Electrical measuring instruments and their uses complete notes. Classification of measuring instruments electrical measurements. Micrometer heads with a mechanical or electronic digital display, which allow direct reading of a measurement value, are also available. They are fitted with stainless steel cases as standard and comply with the en 8371 until en 8373 european standards. Otherwise the main component would lead to a wrong measurement of the transverse component.
Different types of mechanical measuring tools and gauges used. They work without any kind of mechanical contact, consequently they are wearresistant, and theres absolutely no influence on the mechanics. Measuring instruments and gauges are used to measure various parameters such as clearance, diameter, depth, ovality, trueness, etc. Least count value of one main scale division value of one vernier scale division. 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. Units of measurement and their standards, which is concerned with the establishment, reproduction, conservation and transfer of units of measurement and their standards. More concentration should on class room work and text book methodology. These are designed by our professionals using the highest grade of material to enable strength and high durability. Tutorials from indian institue of technology madras. Important measuring instruments multiple choice questions. Sika usa provides a broad selection of mechanical measuring instruments such as industrial thermometers, dial thermometers, pressure gauges and load cells. To the user of measuring instruments a knowledge of their construction and accuracy is. Mostly, the digital meter is used for an accurate reading.
Measurement is done to know whether the component which has been manufactured is as per the requirements or not. 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. Design, manufacturing and testing of gauges of all kinds. 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.