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Topic: Voltmeter

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	Voltmeter - LoveToKnow 1911
		A voltmeter is therefore one form of electrometer, but the term is generally employed to describe the instrument which indicates on a scale, not merely in arbitrary units but directly in volts, the potential difference of its terminals.
		Hot wire voltmeters, like electrostatic voltmeters, are suitable for use with alternating currents of any frequency as well as with continuous currents, since their indications depend upon the heating power of the current, which is proportional to the square of the current and therefore to the square of the difference of potential between the terminals.
		Electrostatic voltmeters are also liable to have their indications disturbed by electrification of the glass cover of the instrument; this can be avoided by varnishing the glass with a semi-conducting varnish so as to prevent the location of electrostatic charges on the glass.
	www.1911encyclopedia.org /Voltmeter (1908 words)

	Voltmeter
		A voltmeter is a device that measures the voltage passing between any two points, typically used to check electric circuits for power.
		One example of a voltmeter, is a moving-coil galvanometer, which works by measuring the rotation of a coil of fine wire suspended in a magnetic field; the angular rotation is directly proportional to the current running through the coil.
		There are several other types of voltmeters in use today, the most common being digital voltmeters that use the natural resistance of electric circuits.
	www.iscid.org /encyclopedia/Voltmeter (216 words)

	voltmeter - a definition from Whatis.com
		A voltmeter, also known as a voltage meter, is an instrument used for measuring the potential difference, or voltage, between two points in an electrical or electronic circuit.
		Most commercially manufactured voltmeters have several scales, increasing in powers of 10; for example, 0-1 V, 0-10 V, 0-100 V, and 0-1000 V. An oscilloscope can be used to measure low voltages; the vertical displacement corresponds to the instantaneous voltage.
		In computer practice, standard lab voltmeters are adequate because the voltages encountered are moderate, usually between 1 V and 15 V. Cathode-ray-tube (CRT) monitors operate at several hundred volts.
	whatis.techtarget.com /definition/0,,sid9_gci774570,00.html (320 words)

	VOLTMETER - Online Information article about VOLTMETER
		Electrostatic voltmeters are based on the principle that when two conductors are at different potentials they attract one another with a force which varies as the square of the potential difference (P.
		rule, electromagnetic voltmeters are only suitable for the measurement of relatively small potentials—o to 200 or 300 volts.
		In this case a high-resistance wire is connected between the points of which the potential difference is required, and from some known fraction of this resistance wires are brought to an electrostatic voltmeter, or to a movable coil electromagnetic voltmeter, according as the voltage to be measured is alternating or continuous.
	encyclopedia.jrank.org /VIR_WAT/VOLTMETER.html (2771 words)

	Voltmeters (Site not responding. Last check: 2007-11-04)
		Voltmeter is an instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts).
		This type of voltmeter was in use for laboratory of industrial measurements as late as 1922.
		High input impedance in a vacuum tube voltmeter is valuable in that the loading effect of the instrument is negligible, and the circuit under test is not disturbed nor "loaded" by the test instrument.
	chem.ch.huji.ac.il /~eugeniik/instruments/test/voltmeters.htm (2082 words)

	Extending Voltmeter Ranges
		When voltmeters are used, a primary rule of safety is that such voltage-measuring instruments must always be connected in parallel with (across) a circuit.
		Voltmeter polarity is the same as for the dc ammeter; that is, current flows from negative to positive.
		The purpose of a voltmeter is to indicate the potential difference between two points in a circuit.
	www.tpub.com /neets/book16/68d.htm (742 words)

	EE-Evaluation Engineering - "12 Considerations for Improving Integrating Voltmeter Throughput
		An integrating voltmeter, often referred to as a DMM or DVM, measures the physical and electrical parameters of the device-under-test.
		Since the default mode of an integrating voltmeter provides the most accurate answer, the power-on default mode of most meters is an integration time of 10 line cycles (200 ms for a 50-Hz line and 166 ms for a 60-Hz line).
		The measurement speed of an integrating voltmeter may be increased by a factor of 2 to 3 just by controlling the voltmeter settings.
	www.evaluationengineering.com /pctest/articles/1098pct.htm (2304 words)

	Battery voltmeter - Patent 5059895
		The voltmeter of claim 1 wherein the air pocket is formed by standoffs located on the dielectric layer surface most distant from the conductive layer.
		The voltmeter of claim 1 wherein the conductive layer is formed from conductive inks, conductive polymers, metal foil or metal wire.
		Moreover the voltmeter of the present invention overcomes the heat sink problem encountered by prior art battery testers by providing thermal insulating means between the conductive layer and the battery housing and providing a conductive layer that generates sufficient heat to affect a change in the color indicator layer.
	www.freepatentsonline.com /5059895.html (3507 words)

	Voltmeter - Wikipedia, the free encyclopedia
		A voltmeter is an instrument used for measuring the potential difference between two points in an electric circuit.
		The moving coil galvanometer is one example of this type of voltmeter.
		Digital voltmeters usually employ an electronic circuit that acts as an integrator, linearly ramping output voltage when input voltage is constant (this can be easily realized with an opamp).
	en.wikipedia.org /wiki/Voltmeter (868 words)

	Voltmeter (Site not responding. Last check: 2007-11-04)
		To install the voltmeter on your lure machine, you need to locate and mount the unit (using the screws provided) so that it is easily seen while operating the lure machine.
		These voltmeters are not a precision instrument but they allow a relative reading of the battery condition at a glance.
		It is a good idea to index your voltmeter by attaching it to a fully charged battery and comparing the reading with that given by a hand held precision voltmeter (if you have one).
	www.injoy-1.com /info_4.htm (429 words)

	Moving Coil Meters
		A voltmeter measures the change in voltage between two points in an electric circuit and therefore must be connected in parallel with the portion of the circuit on which the measurement is made.
		In analogy with a water circuit, a voltmeter is like a meter designed to measure pressure difference.
		It is necessary for the voltmeter to have a very high resistance so that it does not have an appreciable affect on the current or voltage associated with the measured circuit.
	hyperphysics.phy-astr.gsu.edu /hbase/magnetic/movcoil.html (443 words)

	Low Power LED Voltmeter
		This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries.
		The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and over the 22 to 32 volt range for 24 volt batteries.
		Connect the appropriate voltmeter circuit across a 12 or 24 Volt battery and observe the blinking LED for a battery voltage indication.
	www.solorb.com /elect/solarcirc/vom (1717 words)

	Voltmeter FAQ
		The output of this voltmeter is a bar of LEDs, each LED representing 1/2 a volt, with the entire scale ranging from 10.5 volts to 15.0 volts.
		Another option is have a GPS which I want, one with a voltmeter built in (as per Mark 403), but keeping it on the bike all the time is not an option.
		A voltmeter is one of the simplest and most useful electronic instruments to use on any auto.
	faq.f650.com /FAQs/AftermarketVoltmeterFAQ.htm (4429 words)

	Voltmeter - Toseeka Search Results
		Only if (1) the voltmeter is designed to measure microvolts and you're connecting it to megavolts, or (2) your 'voltmeter' is really a multimeter set to measure current.
		The simplest voltmeter is made from a sensitive current meter (e.g., 20 microamps full-scale) in series with a resistor.
		Thus a 100 volt voltmeter can be made from a 20 ua meter and a series resistance of 100/.000020=5 megohms.
	toseeka.com /search.php?q=Voltmeter&t0=&...+003+008_keyword_Voltmeter (1443 words)

	Voltmeter - Uncyclopedia
		The voltmeter is the unit of measurement created by the nefarious Count Chocula -- under the alias "Teh Voltz0r" (or, in English, The N00bish One) during an online game of Counterstrike source -- and was originally used to calculate the amount of people pwnz3d per metre.
		Interestingly, more recent blood theorists such as (Count Heisenberg and the Cult of Gentoo) suggest that suggest that the quantum properties of haemoglobin allow it to be in two places at one time, which means that it is possible a haemoglobin molecule could be ingested twice, effectively doubling the oxygen amount.
		The voltmeter was devised by Count Chocula as a way to determine if he could move across the entire globe without breathing once - simply by using the oxygen gained from blood sucking of puny mortals.
	uncyclopedia.org /wiki/Voltmeter (370 words)

	Non-Contact Electrostatic Voltmeters
		They are distinguished by their reliability, high accuracy typically 0.1% or better almost regardless of probe-to-surface spacing, and by their ability to resolve targets as small as 0.1" (2.5 mm) diameter or smaller.
		Monroe Electronics voltmeters function by means of a high voltage amplifier that automatically drives the probe to the same potential as that of the surface under measurement.
		Electrostatic voltmeters function by means of a high voltage amplifier that automatically drives the probe to the same potential as that of the surface under measurement.
	www.esdproducts.biz /Instrumentation/Voltmeters/voltmeters.html (314 words)

	Solenoid voltmeter - Wikipedia, the free encyclopedia
		A solenoid voltmeter is a specific type of voltmeter used by electricians in the testing of electrical power circuits.
		Solenoid voltmeters usually have a scale on each side of the pointer; one is calibrated for alternating current and one is calibrated for direct current.
		In contrast to modern multimeters, solenoid voltmeters have no other built-in functions (such as the ability to act as an ammeter, ohmmeter, or capacitance meter); they are just simple, easy-to-use power voltmeters.
	en.wikipedia.org /wiki/Solenoid_voltmeter (600 words)

	Voltmeters
		This is the face plate of a Deprez-Carpentier voltmeter in the collection of historical instruments at Washington and Lee University in Lexington, Virginia.
		The voltmeters cost upwards of $32.00, depending on whether multiplier coils were included, and the ammeters cost upwards of $24.00, with the higher prices including shunts for higher current ranges.
		The red electrode is for the voltmeter with its 0 to 10 V scale, while the green electrode drives the ammeter, which reads up to 25 amperes.
	physics.kenyon.edu /EarlyApparatus/Electrical_Measurements/Voltmeter/Voltmeter.html (912 words)

	Voltmeter Design (Site not responding. Last check: 2007-11-04)
		Voltmeters, as well as ammeters and ohmmeters, are designed with the use of a sensitive current detector such as a galvanometer.
		A voltmeter is placed in parallel with a circuit element to measure the voltage drop across it and must be designed to draw very little current from the circuit so that it does not appreciably change the circuit it is measuring.
		To accomplish this, a large resistor is placed in series with the galvanometer.
	hyperphysics.phy-astr.gsu.edu /hbase/magnetic/volmet.html (131 words)

	Voltmeter (Site not responding. Last check: 2007-11-04)
		The Laureate True AC RMS voltmeter offers a full-scale voltmeter display of 0 to 20,000 counts and five full-scale voltmeter ranges from 200.00 mV with 10 mV resolution to 600.0 V with 100 mV resolution.
		The Laureate True AC RMS voltmeter is suited for AC voltmeter applications where there is considerable distortion of current waveforms from nonlinear loading.
		The voltmeter uses precision circuitry to compute the root-mean-square of complex waveforms from 10 Hz to 10 kHz.
	www.laurels.com /voltmeter.html (279 words)

	Voltmeter vs. Ammeter - Auto Meter Tech Tips:
		On the other hand, a voltmeter works like a fuel pressure gauge-but instead of measuring fluid in psi, the voltmeter measures electrical system pressure in volts.
		Just like a fuel pressure gauge, a voltmeter only needs to tap into a circuit; all the fuel (or electricity) does not have to detour through the gauge itself.
		Voltmeter installation is easy, quick, and safe: It hooks up to a fused, ignition-switched "off/on" source and does not require any modification of the circuit used to recharge the battery or any part of the alternator/regulator system.
	www.egauges.com /ATM_Tips.asp?TipPage=voltmeterammeter.htm (576 words)

	Voltmeter Sensitivity
		In the 150-volt range, the voltmeter to be used has a total internal resistance of 10 kilohms.
		Because of the addition of the voltmeter, the voltage drops change to 100 volts across R1 and 50 volts across R2.
		The sensitivity of a voltmeter is given in ohms per volt.
	www.tpub.com /neets/book16/68e.htm (1447 words)

	Voltmeter vs. Ammeter - Opel Community Forums
		I think the value of the ammeter is to tell you if your battery is discharging in a running state, and where for example if you have the lights, defroster, wiper etc. running it might indicate a maxed out or weak charge system.
		A voltmeter would show a voltage drop in this case, but not whether the battery is draining.
		Voltmeters are a much easier install, all you have to do is hook it to a power source, but I am debating the logic.
	opelgt.com /forums/group-1-electrical/10422-voltmeter-vs-ammeter.html (296 words)

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