who invented the multimeter, when was it, and the biography of the inventor?
2006-09-11 06:20:10 · 8 answers · asked by Alberto A 1 in Science & Mathematics ➔ Engineering
Samual H. Multi .
A multimeter is a multiple range test instrument that measures voltage, current, and electrical resistance. It was invented in the 1920s to combine the voltmeter and ammeter into one instrument.
There are two basic types of multimeters. One type has a moving coil, indicator pointer, and a graduated scale; the other has a digital display.
The moving coil (and its cousin the moving iron) multimeter makes use of a principal discovered by Hans Christian Oersted (1777-1851) in 1820; an electric current in a wire produces a magnetic field. The magnetic field exerts a force on a coil (or iron magnet), making it turn. This moves the attached pointer, allowing a measurement to be read off the graduated scale. Its greatest limitation is the need to use the very current being measured when it's operating as a voltmeter.
A multimeter with a digital display makes use of integrated electric circuitss and semiconductors and does not have moving parts. A digital multimeter offers greater accuracy and does not draw current, but it is more expensive to build.
In either case, a multimeter has a dial, or push-buttons, on the outside and different resistors and shunts on the inside. Changing the setting allows the user to switch between the multimeter's various functions.
The primary use of the multimeter, whether it be a moving coil or digital display, is as a voltmeter to measure voltage.
Resistance is measured by the multimeter in ohms. The resistance of a conductor is one ohm when a steady current of one ampere flows through the conductor and produces a potential difference of one volt.
When used as an ammeter, the multimeter measures the flow of electrical current in amperes. Most ammeters measure direct current (DC). A very small current can cause a full-scale deflection of the coil, so the ammeter has to be modified (switchable) if it is used to measure high currents.
The more-intelligent digital display multimeters, which are basically digital voltmeters, have caused a decrease in the use of ammeters.
2006-09-11 07:13:02 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The earliest multimeter I remember was the Simpson 260 and there were other products put out by the same company, so I would have to guess the inventor was someone named "Simpson".
That's the best I can do for you, but it should give you a starting place to research it.
2006-09-11 06:24:59 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The invention of the first multimeter is attributed to British Post Office engineer, Donald Macadie, who became dissatisfied with having to carry many separate instruments required for the maintenance of the telecommunications circuits.
2015-08-01 00:41:15 · answer #3 · answered by john 4 · 0⤊ 0⤋
The multi meter was invented by Samuel H. Multi in the year of 1920.
2015-10-06 21:38:15 · answer #4 · answered by shaun 4 · 0⤊ 0⤋
The multi meter was invented by Samuel H. Multi in the year of 1920.
A multimeter or a multitester, also known as a VOM (Volt-Ohm meter or Volt-Ohm-milliammeter ), is an electronic measuring instrument that combines several measurement functions in one unit.
https://www.electrikals.com/
2015-07-31 22:46:18 · answer #5 · answered by Robert 4 · 0⤊ 0⤋
William Thomson, Lord Kelvin
2006-09-11 06:27:31 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Looking on this site it mentions "voltmeter or multimeter"
if this is the case then it would be Alessandro Volta
2006-09-11 06:33:03 · answer #7 · answered by daisymay 5 · 0⤊ 0⤋
Samual H. Multi
2006-09-11 06:26:29 · answer #8 · answered by Anonymous · 0⤊ 0⤋