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Analog multimeter Digital multimeter. A multimeter (also known as a volt-ohm-milliammeter, volt-ohmmeter or VOM) [1] is a measuring instrument that can measure multiple electrical properties. [2] [3] A typical multimeter can measure voltage, resistance, and current, [4] in which case can be used as a voltmeter, ohmmeter, and ammeter.
Multimeter Tester 2000. This digital multimeter costs significantly less than the other options here, but still covers a wide range of basic residential and automotive tasks.
Together, the companies developed the scopemeter, an instrument combining features of an oscilloscope and a multimeter. Fluke purchased the testing and measurements division of Philips in 1993 for $41.8 million. [2] The Philips PM series of measurement instruments was rebranded as Fluke. Fluke was bought by the Danaher Corporation in 1998.
Agilent Technologies was created in 1999 as a spin-off of several business units of Hewlett-Packard [12] including test & measurement, optics, instrumentation and chemical analysis, electronic components, and medical equipment product lines.
Ideal was founded in 1916 by J. Walter Becker as the Ideal Commutator Dresser Company in Chicago, Illinois, manufacturing commutator dresser stones. [6] In 1924, Becker relocated the company to its current location in Sycamore, Illinois. [7]
Multimeter with Amps, Volts and Ohms (AVO) 1928 Multistation watt-hour meter test board 1942 Resistive load box 1950 Cable fault locator 1951 Protective relay test set 1953 Partial discharge (Corona) detection system 1968 Portable digital multimeter 1979 Digital line earth loop impedance tester 1985 Microprocessor-based high current test set 1989
A power factor and wattage unit was also available). 500 ohms/volt with divide by two button in normal position, 1000 ohms per volt with divide by two button pressed. [ 20 ] AVOmeter model 8: May 1951 to November 2008 (7 'Marks') (Basic ranges to 10 A and 1000, 2500 or 3000 V depending on Mk.). 20,000 ohms/volt DC, 1000 ohms/volt AC.
Although such a probe is an improvement, it does not work when the time scale shrinks to several cable transit times (transit time is typically 5 ns). In that time frame, the cable looks like its characteristic impedance, and there will be reflections from the transmission line mismatch at the scope input and the probe that causes ringing. [2]