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Topic: Ohmmeter

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Ohmeter

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	Ohmmeter - Wikipedia, the free encyclopedia
		An Ohmmeter is an electrical measuring instrument that measures electrical resistance, the opposition to the flow of an electric current.
		The scale of the galvanometer was marked in ohms, because the fixed voltage from the battery assured that as resistance decreased, the current through the meter would increase.
		A more accurate type of ohmmeter has an electronic circuit that passes a constant current I through the resistance, and another circuit that measures the voltage V across the resistance.
	en.wikipedia.org /wiki/Ohmmeter (283 words)

	OHMMETER - LoveToKnow Article on OHMMETER (Site not responding. Last check: 2007-10-19)
		In this case the dynamo and ohmmeter are combined in one instrument.
		In the Nalder ohmmeter the electrostatic principle is employed.
		In thi1 case one terminal of the battery is connected to the earth, and the other terminal i~ connected through the galvanometer with the copper wire, the insulation of which it is desired to test.
	72.1911encyclopedia.org /O/OH/OHMMETER.htm (1092 words)

	Ohmmeter design - Chapter 8: DC METERING CIRCUITS - Volume I - DC
		In this regard, the ohmmeter indication is "backwards" because maximum indication (infinity) is on the left of the scale, while voltage and current meters have zero at the left of their scales.
		An analog ohmmeter scale is "backwards" from that of a voltmeter or ammeter, the movement needle reading zero resistance at full-scale and infinite resistance at rest.
		Analog ohmmeters also have logarithmic scales, "expanded" at the low end of the scale and "compressed" at the high end to be able to span from zero to infinite resistance.
	www.allaboutcircuits.com /vol_1/chpt_8/6.html (1182 words)

	Shunt Ohmmeter
		The ohmmeter described to this point is known as a series ohmmeter, because the resistance to be measured is in series with the internal resistors and the meter movement of the ohmmeter.
		In the shunt ohmmeter, the resistance to be measured shunts (is in parallel with) the meter movement of the ohmmeter.
		The shunt ohmmeter is connected to the circuit to be measured in the same way the series ohmmeter is connected.
	www.tpub.com /neets/book3/7n.htm (450 words)

	Ohmmeters
		The ohmmeter is widely used to measure resistance and check the continuity of electrical circuits and devices.
		The ohmmeter's pointer deflection is controlled by the amount of battery current passing through the moving coil.
		The zero reading of a series-type ohmmeter is on the right-hand side of the scale, where as the zero reading for an ammeter or a voltmeter is generally to the left-hand side of the scale.
	www.tpub.com /neets/book3/7l.htm (674 words)

	IET Labs, Inc. - Ohmmeter
		An ohmmeter is an instrument used to measure the electrical resistance of a conductor.
		A micro-ohmmeter is an ohmmeter for the measurements of very low resistances.
		These ruggedly constructed ohmmeters are housed in a stylish plastic case with an easy to use keyboard, the measured values are displayed in large LCD panel.
	www.ietlabs.com /ohmmeters.html (306 words)

	8886 Reference - Measuring resistance - ohmmeter
		It is important to realise that an ohmmeter can not be used when the resistance is connected in a circuit and a current is flowing through it.
		To use the multimeter as an ohmmeter turn the central selector dial to point to the ohms range.
		It is possible to get more accurate ohmmeters that will measure milliohms and even microhms but you are not likely to have these in a typical school laboratory.
	www.8886.co.uk /ref/ohm_meter.htm (462 words)

	OHMMETER - Online Information article about OHMMETER (Site not responding. Last check: 2007-10-19)
		house wiring; the ohmmeter circuits are then joined up as shown in fig.
		section of the wiring and the test must be connected together at some point and then connected through the series coil of the ohmmeter with one terminal of the dynamo.
		The Evershed and Vignoles form of the instrument is much used in testing the insulation resistance of electric wiring in houses.
	encyclopedia.jrank.org /NUM_ORC/OHMMETER.html (1839 words)

	Throttle Position Switch - Information, Troubleshooting, Replacement, and Adjustment
		Connect the ohmmeter between terminal 3 on the DME wiring harness plug and ground.
		The ohmmeter should be connected between the center terminal on the switch (ground) and each of the outer terminals (2 and 3) and resistance values checked as described above.
		Connect the ohmmeter between terminals 53 and 24 on the DME wiring harness plug.
	www.clarks-garage.com /shop-manual/fuel-06.htm (933 words)

	burster - Milli Ohmmeter RESISTOMAT
		For rapid measurements in the field, when independence from the mains and a high degree of immunity against various interference is needed, this ohmmeter is ideally suitable.
		Low resistance measurements are performed simply in manufacturing, in testing, in the service as well as in the field using this portable milli-ohmmeter.
		A carrying handle allows the ohmmeter to be operated portably.
	www.burster.com /catalog/section2/2319.htm (382 words)

	Dan's Motorcycle
		An ohmmeter sends a very low power electrical charge through a wire and measures how much resistance there is in the wire to the charge going through it.
		When you measure the voltage on a battery by putting the positive ohmmeter lead on the positive terminal and the negative lead on the negative terminal, you are actually measuring the voltage pressure between the two terminals.
		Connect the negative ohmmeter lead to the negative battery terminal and the positive ohmmeter lead to the starter body.
	www.dansmc.com /electricaltesting.htm (4006 words)

	whirlpool elctric dryer element AMERICAN SERVICE DEPT. (Site not responding. Last check: 2007-10-19)
		STEP E Touch one of the ohmmeter probes to any one of the two terminals.
		STEP E Touch one ohmmeter probe to one of the outside terminal (Hi).
		STEP J Touch the other ohmmeter probe to any bare metal (heater box) on the dryer.
	www.american-appliance.com /service_pages/wp_dry/wpdryelement.htm (814 words)

	Automotive fuel injection, Testing the L-jetronic on the V-8 rovers, page 2
		Ohmmeter connected between pin 87 of the fuel pumprelay and pin 34 on the ECU multiplug connection.
		Connect the ohmmeter between terminal 87 or 87A of the main relay and each injector ECU multiplug terminal in turn
		Connect an ohmmeter between terminal 9 and terminals 1,3,5 & 7 on the harness multiplug to check the values for injectors 1,3,5 &7.
	www.roversd1.nl /sd1web/injectiontest2.html (660 words)

	Computer Technology Forum - Hardware Quiz #7: Ohmmeter Function
		When using the ohmmeter function of a DMM to perform tests, you must always ______.
		The Ohmmeter function is used to measure resistance.
		To measure the value of a resistor, you MUST connect the voltmeter leads across the resistor, which means that the Ohmmeter is in parallel with the resistor.
	www.tech-forums.net /showthread.php?s=&threadid=14179 (670 words)

	Micro-Ohmmeters & Milliohmmeters
		A reverse polarity switch compensates for the effect of DC voltage interference on the accuracy and permits reading averaging.
		The DLRO 10 is built into a strong, lightweight case which is equally durable while working on the bench, in the field, or in the laboratory.
		Biddle® Digital Low Resistance Ohmmeters (DLRO®) are a family of highly accurate instruments that provide a simple, practical and reliable means of making low-resistance tests in the field.
	www.repaircalibration.com /microohmmeters.html (998 words)

	Drives Service & Support > Legacy > 1330 > 10-15HP > Troubleshooting
		Connect the (+) ohmmeter lead to E1C and the (-) ohmmeter lead to E2A.
		c2) If the ohmmeter continues to indicate low ohms when all electrolytic capacitors are disconnected, the fault is elsewhere.
		On the lower A6 modules(A6LA - A6LB - A6LC) connect the (+) ohmmeter lead to the White Lead and the (-) ohmmeter lead to the Black #10AWG Lead.
	www.ab.com /support/abdrives/other/1330/10215/tshoot.html (1647 words)

	[No title]
		Harris IRT Model 5050-06XP is a Portable Compact Digital Ohmmeter with.02% Accuracy, 4-Wire Kelvin Test for.0001 Ohm Resolution Independent of Lead Resistance.
		Harris IRT Model 5012-06XP is a Portable Compact Digital Ohmmeter with.05% Accuracy, Built-In digital limit sensors and a relay output for Automated Testing.
		Harris IRT Model 5050-05A is a Digital Ohmmeter with.02% Accuracy, 4-Wire Kelvin Test for.0001 Ohm Resolution Independent of Lead Resistance.
	www.ohmmeters.biz (208 words)

	Valhalla Scientific (Site not responding. Last check: 2007-10-19)
		The 4014 is Valhalla's widest range digital ohmmeter.
		Besides being Valhalla's high range (200 Megohms) ohmmeter the 4014 is one of the best values as it is economically priced to be affordable.
		Like all Valhalla ohmmeters, the readings are instantaneous and automatic, no manual balancing or fractional scale interpolation.
	www.valhallascientific.com /ohmmeters/ohm-4014.shtml (389 words)

	ohmmeter on Encyclopedia.com
		OHMMETER [ohmmeter], instrument used to measure the electrical resistance of a conductor.
		In normal usage, the ohmmeter operates by using the voltmeter to measure a voltage drop, then converting this reading into a corresponding resistance reading through Ohm's law.
		A free trial at HighBeam will give you more info than you can handle.
	www.encyclopedia.com /html/o1/ohmmeter.asp (159 words)

	Tinsley Precision Instruments Model 5896 Transformer Micro-Ohmmeter (Site not responding. Last check: 2007-10-19)
		Small, pole mounted transformers, to large distribution types with 3 or 5 limb construction are easily measured using the 5896 as are notoriously difficult transformer types including 3 phase closed delta and auto-tap changers.
		The single or two channel measurement of primary or primary and secondary transformer windings are displayed on a large LCD screen to 4 1/2 digit resolution e.g.
		An advanced, high power, wide ranging Ohmmeter for fast, accurate and sensitive measurements of transformers or other inductive loads.
	www.tinsley.co.uk /5896.htm (588 words)

	Safety Ohmmeter 1681A Armaments - Intrinsically Safe Electrical Bond and Continuity Tester
		The Safety Ohmmeter 1681A is a hand held tester that can be used to measure resistance values between 1 milli-Ohm and 20,000 Ohms.
		The 1681A Safety Ohmmeter Armaments version has been specifically designed for safe resistance testing of squibs, detonators etc. The instrument is also approved for use in zone 1 and zone 2 hazardous atmospheres.
		The unit can be operated in its carrying case, which is also conductive.
	www.agiltd.co.uk /safetyohma.htm (178 words)

	MT8455 Volt Ohmmeter
		Rugged KS kickmeter with Voltmeter, Ohmmeter and polarity reversing switch.
		The 8455 measures loop resistance to identify and locate line faults.
		The line can be "kicked" using the reversing switch to determine voltage balance between pairs and ground.
	www.metrotelcorp.com /mt8455.html (120 words)

	Ohmmeter usage - Chapter 2: BASIC CONCEPTS AND TEST EQUIPMENT - Volume VI - Experiments
		You can, for instance, test the continuity of a piece of wire by connecting the meter probes to opposite ends of the wire and checking to see the the needle moves full-scale.
		What would we say about a piece of wire if the ohmmeter needle didn't move at all when the probes were connected to opposite ends?
		Suggestions for materials to measure are: fabric, plastic, wood, metal, clean water, dirty water, salt water, glass, diamond (on a diamond ring or other piece of jewelry), paper, rubber, and oil.
	www.allaboutcircuits.com /vol_6/chpt_2/2.html (1628 words)

	burster - Digital Ohmmeter RESISTOMAT
		RESISTOMAT ® digital ohmmeters are the modern and favourablesolution for the accurate, simple and fast measuring of low ohmic resistances.
		Digital ohmmeters of type 2302 have become significant not only in the field of "Thomson measurings" but have also gained importance in the classical field of "Wheatstone-technique".
		Further information is given in the operating instructions.
	www.burster.com /catalog/section2/2302.htm (260 words)

	IET Labs - Series 4000 Ohmmeter
		The series 4000 digital ohmmeters offer true portability without any sacrifice to accuracy or functionality.
		30ppm Rdg +25 ppm FS The series 4000 portable digital ohmmeters are a practical range of instruments for low resistance measurement, ideal for use in the workshop on site or in the laboratory.
		Constructed in a hand portable plastic case sealed to IP54 standard the series 4000 offers many advanced features, including auto reverse of measurement current, which eliminates errors due to thermal emf.
	www.ietlabs.com /Crop/Series4000Ohmmeter.html (326 words)

	Ohmmeters and Ohmmeter at eTesters
		An ohmmeter is used to measure electrical resistance of a conductor.
		Usually a voltmeter and often an ammeter measuring a voltage drop by converting it into a corresponding resistance value through Ohm's law.
		For the wide range of low-resistance testing applications which require test currents of up to 200A, Megger's new DLRO200 digital low-resistance ohmmeter is a convenient and cost-effective choice.
	www.etesters.com /topics/view.cfm/topic/Ohmmeters (70 words)

	Megger - Transformer Ohmmeter
		A built-in circuitry safely discharges the specimen when the test is completed, if load accidentally disconnected or if line power is lost.
		The Transformer Ohmmeter is extremely useful when testing the operation of on-load tap-changers.
		This instrument can be used to check the make-before-break operation of on-load tap-changers and also to measure the contact resistance of each tap position.
	www.megger.com /us/products/ProductDetailsWithSubGroup.asp?ID=183&ProductSubGroupCode=P304&ModelFamily=FE (137 words)

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