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[am-mee-ter] /ˈæmˌmi tər/
noun, Electricity
an instrument for measuring current in amperes.
1880-85; am(pere) + -meter Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ammeter
  • Put the power source in series with an ammeter and a calibrated variable resistor.
  • If an ammeter is not built into the power supply an ammeter should be wired into the circuit to monitor the current flow.
  • Monitor the current continuously using the ammeter to determine whether or not the connector circuit retains its conductance.
  • As each item is connected, read and record the total leakage current indicated by the micro-ammeter.
  • Change the circuit and use the multimeter as voltmeter, ammeter, or ohmmeter.
  • Don't let a little wiggle of the ammeter or alternator load meter convince you the electricity is doing its job.
  • Make resistance measurements using either the resistance bridge method, the voltmeter-ammeter method or a resistance meter.
  • Check for correct ammeter readings while system is under load.
  • Fifteen minutes after start-up, measure the current draw of the motors with ammeter and record the reading of the vacuum gage.
  • The ammeter shall be provided with an external shunt.
British Dictionary definitions for ammeter


an instrument for measuring an electric current in amperes
Word Origin
C19: am(pere) + -meter
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 ammeter

instrument for measuring the strength of electric currents, 1882, from ampere + -meter.

Online Etymology Dictionary, © 2010 Douglas Harper
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ammeter in Science
An instrument that measures the strength of an electric current, indicating it in amperes. Ammeters typically include a galvanometer; digital ammeters typically include A/D converters as well. Compare ohmmeter, voltmeter.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for ammeter

instrument for measuring either direct or alternating electric current, in amperes. An ammeter can measure a wide range of current values because at high values only a small portion of the current is directed through the meter mechanism; a shunt in parallel with the meter carries the major portion.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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