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[vohlt-mee-ter] /ˈvoʊltˌmi tər/
noun, Electricity
a calibrated instrument for measuring the potential difference between two points.
1880-85; volt1 + -meter Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for voltmeter
  • In fifth grade, as part of this informal apprenticeship, he was given a voltmeter kit and built it beautifully.
  • Make resistance measurements using either the resistance bridge method, the voltmeter-ammeter method or a resistance meter.
  • Demonstrate proper use of voltmeter and how it is used to measure resistors.
  • Introduce the voltmeter and its application in the measurement of resistors and resistor circuits.
  • Block tests check for proper operation of the voltmeter and isothermal block itself.
  • voltmeter--A voltmeter is a device used to measure voltage on an electric fence.
  • The meter section should contain a voltmeter, ammeter and watt-hour meter with demand register.
  • Use of an oscilloscope voltmeter, to avoid turning off the cathodic protection current is presented.
British Dictionary definitions for voltmeter


an instrument for measuring potential difference or electromotive force
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for voltmeter

1882, from volt + meter (n.3).

Online Etymology Dictionary, © 2010 Douglas Harper
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voltmeter in Science
An instrument used for measuring the difference in voltage between two points in an electric circuit. Voltmeters typically make use of an ammeter that measures current flow across a known resistance inside the voltmeter; direct-current voltages can then be determined by Ohm's law. Digital voltmeters employ A/D converters to provide the numerical value of the voltage displayed. Compare ohmmeter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for voltmeter

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). The typical commercial or laboratory standard voltmeter in use today is likely to employ an electromechanical mechanism in which current flowing through turns of wire is translated into a reading of voltage. Other types of voltmeters include the electrostatic voltmeter, which uses electrostatic forces and, thus, is the only voltmeter to measure voltage directly rather than by the effect of current. The potentiometer operates by comparing the voltage to be measured with known voltage; it is used to measure very low voltages. The electronic voltmeter, which has largely replaced the vacuum-tube voltmeter, uses amplification or rectification (or both) to measure either alternating- or direct-current voltages. The current needed to actuate the meter movement is not taken from the circuit being measured; hence, this type of instrument does not introduce errors of circuit loading

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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