All others, such as units for electrical resistance and voltage, are derived units. Electrical measuring equipment, electrical measuring. This study introduces practical and simple ways of measuring labor productivity in a contractors organization at different levels of detail. Voltmeter voltmeter a simple dc voltmeter can be constructed by placing a resistor rs, called a multiplier, in series. Electrical measuring instruments presented by suhail ahmed bsamt02161001. Classification of measuring instruments electrical. Electrical units definitions volt v volt is the electrical unit of voltage. Sockets safely connect meters to the power flow, allowing for accurate measurements. To tell the truth i could not find a suitable book on the whole subject and therefore i.
Electrical field, e, is the negative of the gradient in electrical potential, i. Understand the necessity and operating principles of portable measurement equipment. Electrical measuring equipment includes electromechanical equipment and systems for measurement, display, recording, processing, and telemetry for electricity metering, as well as meter mounting and test equipment. As well as the standard electrical units of measure shown above, other units are also used in electrical engineering to denote other values and quantities such as. Handheld mains powered portable tools shall be the double insulated type. The disadvantage is they are unable to respond rapidly to measurement of dynamic and transient conditions. Electrical engineers are required to work in hazardous environments near energized equipment. Eg, a light bulb consumes one hundred watts of electrical power for one hour. Basic electrical engineering tools, instrument, devices. This book explains the basic measurement techniques, instruments, and methods used in everyday practice. Measuring instruments that do not make it clear which measuring method is being applied should not be used. The electrical quantity or characteristic measured, or.
General knowledge of the application fields and legal framework for portable measurement equipment. Whether you are working on the production line, in the laboratory, or servicing equipment, measurements can yield cost savings proportional to instrument accuracy. Basic electrical measurements e80 feb 26, 2012 prof. There are several advantages of traditional electromechanical instruments. Electrical measuring instruments and their uses complete notes. It focuses only on the tests and equipment needed to minimize electrical shock and does not discuss mechanicalphysical injury and fire hazards. Study the safety procedures of the electrical lab 2. List of electrical and electronic measuring equipment. The inclusion of an electrical measurement course in the undergraduate curriculum of electrical engineering is important in forming the technical and scientific knowledge of future electrical engineers. Study the basic functions of digital multimeter dmm 3. Transcat offers all types of electrical test instruments for diagnosis, troubleshooting, and repairing of any products and devices. Principles of measuring voltage, current and resistance 5. Nevertheless, in the electrical field it is not always easy to find samples to compare. Whether theyre multimeters, clamp meters, current testers, or voltage testers thanks to innovative technologies and simplified applications, testos measuring instruments measure electrical parameters, such as current, voltage, and resistance, more reliably and precisely than ever before.
Pdf electrical measuring instruments and measurements. Modern electronic instrumentation and measurement techniques. Bakshi measurements and measurement systems units and standards of measurements errors in measurements and their analysis measuring system fundamentals analog ammeters and voltmeters extension of instrument range analog measurement. Be able to perform simple electrical measurements of voltage, current, and resistance, as well as more sophisticated, scientific electrical measurements, master handheld and more accurate stationary multimeters and understand their differences, have some knowledge of use of ac signals, ac generators, and an oscilloscope. Electrical measurements and measuring instruments1. National work group usnwg formed in august 2012, to develop proposed requirements for commercial electricity measuring devices including those used in submetering electricity at residential and business locations and those used to measure and sell electricity dispensed as a vehicle fuel and to ensure that the prescribed methodologies and standards facilitate measurements that are. Target group personnel who perform verification and electrical measurements.
All types of measuring equipment, such as power quality measurement devices, electricity meters or transducers, can. One volt is the energy of 1 joule that is consumed when electric charge of 1 coulomb flows in the circuit. Call at our test equipment depot and order digital multitester equipment. Elements of a measuring system these components might be contained within one or more boxes, and the boxes holding individual measureme nt elements might be either close together or physically separate.
These instruments are used principally for measuring basic parameters such as current, voltage, resistance, and speed of rotation, or for general. The meter is provided with 32 program adjustable alarms, up to four inputs or outputs and. Testos range of electrical measuring instruments cover all important measurements for testing electrical systems, and features topquality digital multimeters, clamp meters, voltage testers, currentvoltage testers and ncv testers. R, l, c voltage division experimental plots time domain frequency domain bode plots instrumentation. In germany, the electrical and electronic equipment act came into effect on 16 march 2005, which, along with the rohs, also adopted eu directive weee disposal of waste electrical and electronic equipment in german law. Use of electrical test equipment test equipment is necessary for determining proper setup, adjustment, operation, and maintenance of electrical systems and control panels. Name purpose ammeter ampermeter measures current capacitance meter. A wide variety of electrical measuring equipment options are available to you, such as auto testing machine, universal testing machine, and paper testing instrument. Mcq on measuring instruments 1 how engineering works. Electrical and electronics measurements and instrumentation. Practical guide to electrical measurements in low voltage switchboards 1 electric measurements 1. I lecture on electrical measurements to students of electrical engineering, robotics and informatics. Higher productivity levels allow contractors to simultaneously increase profitability, improve competitiveness, and pay higher wages to workers, while completing activities sooner.
Types voltmeters for measuring differences of potential voltage between two points in an electrical circuit. Ohms law dictates that for a specified energy source, operating on v ac or v dc. A guide to low resistance testing test equipment depot. The measurement principle involves using an appropriate generator g. All contractors and hired portable electrical equipment shall be tested, inspected. Test meter are suppliers of electrical test equipment. In the first one chapters two and three the fundamentals and classic electrical methods. The following categories are outside the scope of this directive.
Measuring instruments for electrical measurement parameters. Function and accuracy tests of measurement devices in electrical power systems are either prescribed by mandatory standards and regulations or form part of an established quality assurance concept. This will help to assure that parts, subassemblies, and assemblies conform to specified requirements. Jan 14, 2017 electrical and electronic measuring equipment. A dmm can measure acdc voltage acdc current resistance continuity test diode check dmm display measured value in numerals on lcd display. Electrical measuring devices quiz electrician exams. Series in sensors includes bibliographical references and index. Measuring low resistance helps identify resistance elements. Electrical safety in the workplace 2 course goal the aim of this program is to provide comprehensive onsite training to high risk workers i.
Testos electrical measuring instruments testo, inc. Ampere a ampere is the electrical unit of electrical current. Electrical measuring instruments and their uses complete. Portable electrical equipment shall not be used on site unless it is registered and has a current approval tag. Creeping in energy metre implies a slow rotation of rotor with only voltage coil excited. Electrical measuring tools and equipment electric current. Both signal generation signal generators, power supplies and signal measurement multimeters, scopes instruments are nonideal. Measuring centres 7 use the mc 740 multifunction meter is used for monitoring and measuring electrical quantities of a threephase electric energy distribution system. Office and fixed electrical appliances shall be registered and inspected monthly. Using transducers, physical properties such as temperature, pressure, flow, force, and many others can be converted into electrical signals, which can then be conveniently measured and recorded.
Using piezoelectric accelerometers to convert vibratory motion into an electrical signal, the process of measurement and analysis is ably performed by the vers. The meter is provided with 32 program adjustable alarms, up to four inputs or outputs and communication. 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. Static electricity meters are specialpurpose devices used to measure static electricity in the vicinity of sensitive equipment. The scope of this electrical installation handbook is to provide the designer and user of electrical plants with a quick reference, immediateuse working tool. Typical electrical drawing symbols and conventions. List of electrical and electronic measuring equipment wikipedia. Below is the list of measuring instruments used in electrical and electronic work. This is all from this post about electrical measuring instrumentation. Is a pocket sized tool used to test the presence of current in a line wire or circuit.
The instrument is used for monitoring, measuring and recording measurements of electric quantities of electrical power distribution system. The term measuring instrument is commonly used to describe a measurement system. Electrical installation handbook protection, control and. This module describes electrical measuring and test equipment and includes the parameters measured and the principles of operation of common instruments.
All the static performance characteristics are obtained by one form or another of a process called calibration. The electrical system normally depends upon a mechanical meter movement as indicating device. All testo electrical testing equipment has gone through extensive tests to ensure it is reliable, robust, and suitable for a range of electrical measurements and. Electrical measuring tools and instruments are sensitive and delicate so extra care is necessary in handling them. Principles of electrical measurement by slawomir tumanski. Quality test meters, test equipment and electrical testers from megger, metrel, seaward, kewtech and flir. Sarah harriss lecture from 2009 overview circuits electrical building blocks. A digital multimeter is a electronic instrument which is used to measure electrical parameters. Kidwell, walter, electrical instruments and measurements, mcgraw hill. Measuring centres 7 use the mc 740 multifunction meter is used for monitoring and measuring electrical quantities of a threephase electricenergy distribution system. Measuring earth resistance electrical engineering portal.
For more than 55 years, testo has stood for innovative measuring solutions made in germany. Classification, absolute and secondary instruments, indicating instruments. With unique features to make the life of the user easier, this new range of electrical measuring instruments bring a fresh feel to the sector. Electrical test instruments and measuring devices cedengineering. Instrumentation and measurement in electrical engineering. These are used to measure currents, voltages, resistances, wattages, and other important elements in electrical works. Which of the following meter is an integrating type instrument. Our wide array of handheld, bench, and portable equipment covers virtually every electrical testing application. Electrical measuring instruments presented by suhail ahmed bsamt02161001 2. There are certain tools they require to carry out their job effectively and safely without causing any harm to themselves and those around them. Presently, he is professor, department of electrical engineering and dean. With an ac voltage, you could measure the instantaneous power using the equation above or the average power, which is usually most useful, using the equation below.
It measures the amount of electrical charge that flows in an electrical circuit per. Module 15 electrical distribution systems this module describes basic electrical distribution systems and includes characteristics of system design to ensure personnel and equipment safety. About 12% of these are testing equipment, 3% are laser rangefinders, and 1% are electronic products machinery. The development of all measuring instruments like watt meter, voltmeter, ammeter, requires some understanding of measuring instruments and their internal construction. Electrical measuring instruments give an accurate and efficient reading for electrical equipment. This is not intended to be a theoretical document, nor a technical catalogue, but, in addition to the latter, aims to be of help in the correct definition of equipment. Zotektools manufacture electrical measuring instruments and their accessories. It is also used for safety purpose while electrical circuit development and testing in the lab. The transition period for the affected manufacturers and sectors ran until 1 july 2006.
Electrostatic discharge esd can be an important cause of power quality problems in some types of electronic equipment. The following is a general procedure for use of test equipment. Practical guide to electrical measurements in low voltage switchboards 1 1 electric measurements measurement. Electrical shock electrical shock and its effects can be caused and influenced by several factors. Electrical measuring devices quiz questions answers. Wh the watthour, the amount of electrical energy consumed by a circuit over a period of time. Electrical methods of indicating the output of detectors are more rapid than mechanical methods. That combines several measurements functions in one unit.
This method is referenced in all the electrical installation testing standards and can be used to measure the earth resistance both accurately and safely. Mostly, the digital meter is used for an accurate reading. Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measuring the length of electrical connector pins 21 quickconnect device for monitoring signal on barriertype terminal strips 22.
Introduction an electronic measuring instruments called meter. Earthground measurement guide chauvin arnoux metrix. Measuring the labor productivity of electrical contractors. Electrical measuring equipment is available in three basic configurations. The static characteristics of an instrument are, in general, considered for instruments which are used to measure an unvarying process condition. The standard units of electrical measurement used for the expression of voltage, current and resistance are the volt v, ampere a and ohm. All testo electrical testing equipment has gone through extensive tests to ensure it is reliable, robust, and suitable for a range of electrical measurements and applications. Measurement of electrical quantities may be done to measure electrical parameters of a system. Mileaf, harry, electricity one seven, revised 2nd edition, hayden book company. Dec 05, 2019 electrical measuring instruments give an accurate and efficient reading for electrical equipment.
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