Various materials are used in the construction and manufacturing fields. It is a type of multimeter which functions digitally. Phase sequence meter multimeter analog and digital,tong tester. Oct 22, 2017 tong tester or clamp meter basically works on the principle of mutual inductance. Total organic carbon toc measurement is commonly used to determine the degree of organic contamination in water. Clamp meters using current transformer for ac measurement current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. Voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester. Clamp meter tong tester is one of the most useful test equipment. Tong tester free download as powerpoint presentation. An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter, tong tester, or colloquially as an amp clamp. Digital tong tester model kew2007a imported 3 12 digit lcd display ac clamp meter.
Accessories for impact testing machines, self centering tong. Marine notes marine notes is the place for all the marine. Explain the basic working principles of a variety of pressure sensors. With advanced performance, the amp clamp meter line. Induction motor three phase induction motor working principle. Explain the basic working principles of a variety of flow meters. Infrared sensing techniques for adaptive robotic welding the current was measured using a columbia electric mfg. Details of measuring instruments testing equipment are etc sr. Manual and automatic test cases an effective testing process must include both manually and automatically produced test cases. Aclamp meteris an electricaltesterthat combines a basic digital. Get tong tester at best price with product specifications.
I had published few books and notes for marine engineers who are preparing for exams or promotion. Automatic tests take advantage of tireless machines to do more testing than humans can. Energy meter digitalanalog insulation tester megger, earth tester. Domain knowledge plays an important role in software testing, as one of the software testing principles says testing is context driven.
Explain the basic working principles of a variety of speed transducers. An electrical meter with integral ac current clamp is known as a clamp meter. Electrical contractor working on panels and branch circuits measure loads on a branch circuit at a panel including feeder cables, branch circuits, and neutrals and the continuity of switches, fuses, and contacts measure load side voltage of a breaker or fuse check if a circuit is live before beginning work. To see, print, or download the latest manual supplement, visit. Their basic operation is like that of a transformer. Ppt instrument transformer powerpoint presentation free.
For good insulation, the resistance usually reads in the megohm range. Accessories for impact testing machines, self centering. An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter or tong tester. A typical multimeter may include features such as the ability to measure. Toc analyzer working principle instrumentation tools. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Digital multimeter working principle analyse a meter.
It will define the what, where and when of our planned testing, influence regression testing and largely determines which test techniques to use. This post will discuss tong tester types, operating principle and how to operate it. A wide variety of digital tong tester options are available to you, such as usage, feature, and power. Pressure drop devices based on bernoulli principle a venturi b orifice plate c pitot tube 2. This series testing machine is widely used in aerospace, petrochemical industry,wire and cable,machinery manufacturing,plastic, rubber,mining,ceramic. Total organic carbon toc is an indirect measure of organic molecules present in water and measured as carbon. Make capacity year remarks 01 multi meter 2 acd machine 0200 amt.
These materials are subjected to various forces and stresses. Aug 30, 2009 a tong tester is a form of current probe which has jaws that open and can be clamped around a cable. Testing voltage is produced by hand operated dc generator for manual operated megger. The columbia tong test ammeter, manufactured by weschler instruments, is an example of the iron vane type, used for measuring large ac currents up to amperes. By doing so the jaws form a loop for a transformer which can be used to measure current through the wire. In general hall elements are used as a sensor to detect dc current because it is not possible to employ an.
The megger insulation tester is essentially a highrange resistance meter ohmmeter with a builtin directcurrent generator. Ensure that the tong tester multimeter used is of true rms type. Toc analyzer working principle total organic carbon toc measurement is commonly used to determine the degree of organic contamination in water. Working of a phase or line tester when we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phaseline tester, then circuit is completed and current start to flow in metallic rod, hence the neon bulb inside mains tester glows. What is the working principle of taung tester clamp meter. The complete guide to electrical insulation testing. Digital tong tester dot 750 is 3 12 digit a compact portable precision instrument. A tong tester is a form of current probe which has jaws that open and can be clamped around a cable.
Manual tests take advantage of the testers domain knowledge to do more indepth testing. Organic molecules are introduced into the water from the source water, from. What is clamp meter tong tester types, operating principle. About 61% of these are clamp meters, 2% are power meters, and 4% are multimeters. This series testing machine is widely used in aerospace, petrochemical industry,wire and cable,machinery manufacturing,plastic. The jaws are individually wrapped by coils of copper wire. Pdf test file congratulations, your computer is equipped with a pdf portable document format reader. Working principle of speedometer is the torque of the motion of the wheels is read through a meter and is visible to the user. Electrical engineering longowal polytechnic college. The published books and notes are available for low price and the buyer will get an reference link of the book. A clamp meter is an electrical test tool that combines a basic digital multimeter with a current sensor. Induction motor three phase induction motor working principle production of rotating magnetic field, squirrel. Figure 16 a combination meter that measures and displays both the temperature and the humidity is useful to use. The iron jaws of the meter direct the magnetic field surrounding the conductor to an iron vane that is attached to the needle of the meter.
The phasor is made of a vector with magnitude proportional to the magnitude of e, rotating at a constant rotational speed. This series universal testing machine is mainly used to do stretching, compression and bending testing for metal and nonmetals such as rebar,wire rope,anchor rod,bolt fastener,cable and so on. Explain the basic working principles of a variety of force gauges. Together, they form a magnetic core during measurements.
Basically, youre applying a voltage specifically a highly regulated, stabilized dc voltage across a dielectric, measuring the amount of current flowing through that dielectric, and then calculating using ohms law a resistance measurement. In general hall elements are used as a sensor to detect dc current because it is not possible to employ an electromagnetic induction method as used for dedicated ac clamp meters. Ppt instrument transformer powerpoint presentation. The clip or clamp or moving part of meter has a magnet in it which act as a magnetic core as in transformer. The fluke 373 clamp meter the meter measures truerms ac and dc voltage, ac current. Yukon department of education box 2703 whitehorse,yukon canada y1a 2c6. The energy is the total power consumed and utilised by the load at a particular interval of time. The level transmitters animation shows different types of sensors working principles visually which includes guided wave radar level transmitter, ultrasonic level transmitter, 2 wire 4 wire pulse type radar. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. There are several adc available in the market, but we.
Megger working principle types history uses of megger. A digital multimeter or dmm is test equipment used for resistance, voltage, current measurement and other electrical parameters as per requirement and displaying the results in the mathematical digits form on an lcd or led readout. The megger insulation tester is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Hygrometers typically resemble a clock, with the scale reading from 0% to 100% relative humidity. Working principle of megger voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester. Digital voltmeter is the basic instrument used for measurement of voltage through the use of analog to digital converter. Tong tester use pdf, tong tester pdf, tong tester construction, tong tester principle, tong tester working principle, tong tester pdf file download, working principle of tong tester, pressure view oil burner pump tester t10 tester, pilling tester abrasion tester, amfor 881 tester alternator tester. Testing is always done differently in different contexts. In electrical and electronic engineering, a current clamp, also known as current probe, is an. Manual testing the selection of model has very high impact on the testing that is carried out. It is used in domestic and industrial ac circuit for measuring the power consumption.
The hioki ft6380 is a lightweight clampon ground resistance tester for testing earth resistance. Built on success, digital clamp meters designed by fluke are known as workhorse current clamp meters. Practically all required tests can be performed on the utm. Resembling a current clamp in appearance and function is the rogowski coil current.
Marine notes online is the place for all the marine engineering people easy to share and easy to buy the books that are required for studies and preparation and reference. The power loss in instrument transformers is very small as compared to power loss due to the resistance of shunts and multipliers. Clamp meters working principle instrumentation tools. The basic principle behind digital multimeters is the analog to digital converter because without this we are not able to convert the analog output into digital form. Digital clamp meter from sigma instruments, sunil associates deals in electrical, electronic equipments. Marine notes marine notes is the place for all the. A fluke tong test ammeter is located in the inlet circuit of phase a to measure the current of iacin the ac circuit. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. You should be able to view any of the pdf documents and forms available on our site. Heating and airconditioning principles 5 element that expands and contracts, based on the humidity. Working principle of synchroscope and phase sequence indicator, tong tester clampon meter. As shown in a figure at left, a hall element is placed across a gap created by cutting off part of the transformer jaws. Fluke tong tester buy and check prices online for fluke. Please note that the current output ot 440 volt capacitor connected to a system of 415 volt will be lesser than rated value.
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