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General purpose instrument measures voltage, current and resistance (and sometimes other quantities as well) Network analyzer: Measures network parameters Ohmmeter: Measures the resistance of a component Oscilloscope: Displays waveform of a signal, allows measurement of frequency, timing, peak excursion, offset, ... Psophometer
Military instruments as a class draw on most of the categories of instrument described throughout this article, such as navigation, astronomy, optics, and imaging, and the kinetics of moving objects. Common abstract themes that unite military instruments are seeing into the distance, seeing in the dark, knowing an object's geographic location ...
Many of the parts of this series have been harmonized by CENELEC CLC/SR 66 "Safety of measuring, control, and laboratory equipment" [1] as EN standards, and almost all of them eventually get published in the Official Journal and receive Presumption of Conformity for the EU Low Voltage Directive, as seen in the lists of harmonised standards (PDF Version).
Class of accuracy in electrical measurements; Clifton nanolitre osmometer; Clinometer; Cole's quadrant; Compressometer; Constant fraction discriminator; Continuous-scan laser Doppler vibrometry; Corrosion monitoring; Cover meter; Creep-testing machine; Creepmeter; Cross bow quadrant; Current clamp; Cylindrical coordinate measuring machine
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.
Electrical measurements are the methods, devices and calculations used to measure electrical quantities. Measurement of electrical quantities may be done to measure electrical parameters of a system. Using transducers, physical properties such as temperature, pressure, flow, force
IEC 60051 Direct acting indicating analogue electrical measuring instruments and their accessories; IEC 60052 Voltage measurement by means of standard air gaps; IEC 60055 Paper-insulated metal-sheathed cables for rated voltages up to 18/30 kV (with copper or aluminium conductors and excluding gas-pressure and oil-filled cables)
Ideally the measuring device should not affect the circuit parameters i.e., the internal impedance of the ammeter should be zero (no voltage drop over the ammeter) and the internal impedance of the voltmeter should be infinite (no current through the voltmeter). However, in actual case, ammeters have a low but non zero impedance and voltmeters ...