electrical
A charge at rest generator when materials are rubbed together also called triboelectric charging
Static Electricity
A test lamp with an added power source used to indicate whether a circuit is complete.
Continuity Tester
An ohmmeter that uses high voltage to make resistance measurements. Also called megger or insulation tester.
Megohmmeter
A device used to detect the presence of voltage and the direction of rotation in three-phase conductors.
Phase Sequence Tester
A generator that recovers and uses the hot exhaust of combustion engine as the energy to produce the steam
Heat Recovery Steam Generator ( HRSG )
A device used to interrupt for complete the flow of electricity
Switch
A pair of lines, either horizontal or vertical, whose position may be changed to take measurements on an oscilloscope.
Cursor
A device used to verify the presence of voltage in a conductor even through conductor insulation.
Non-contact Voltage Tester
A device with three indicator lights used to verify that an electrical outlet is wired correctly.
Receptacle Tester
A reactor that uses the heat from nuclear fission in the reactor core to directly produce steam
Boiling-Water Reactor ( BWR )
The outermost show of electrons surrounding an atom
Valence Orbital
A device capable of taking several electrical measurements, including voltage, current, resistance, capacitance, and diode function, and displaying the values.
Digital Multimeter ( DMM )
An electrical troubleshooting device that shows the change in electrical signal or voltage over time as a continuous graph, usually a wave. Also called scope.
Oscilloscope
A device for testing the “hot” slot of a receptacle to determine whether the receptacle is wired properly.
Screwdriver Voltage Tester
A rating given to an enclosure by NEMA to indicate the environment in which can be used
NEMA Rating
The automatic calculation of the correct range on a digital multimeter without operator intervention.
Auto-ranging
A noncontact electronic device that measures infrared radiation emitted from a surface or object to determine its temperature.
Infrared (IR) thermometer
An undesirable voltage spike in excess of intended voltage. Also called transient.
Overvoltage
A lamp with two wires used to test for the presence of electricity.
A group of vertically arranged enclosures that contain busbars for distribution of electrical power to loads.
Motor Control Center
A device used to measure electric current through a noncontact method. IT is capable of measuring higher currents than a digital multimeter, and it also includes a voltmeter, ohmmeter, diode tester, and capacitor tester.
Clamp-on Ammeter
A device that measures inductance (L), capacitance (C), and resistance (R).
LCR Meter
A reading on a digital multimeter of electrical potential or voltage, between conductors that have no voltage. Also called ghost voltage.
Phantom Voltage
The point at which an oscilloscope begins sweeping the displayed waveform from left to right.
Triggering
the si unit for voltage abbreviated as v
Volt