Elektrotechniek woordenboek Engels-Nederlands ()

Definitie EN: a radar system employing an aerial arrangement in which two fan-shaped beams,one vertical and the other inclined,intersect at ground level

V-parameter

EN: V-parameter
NL: V-parameter

Definitie EN: a parameter that can be used to calculate or express the number of propagating modes that a step-indexed optical fibre is capable of supporting

V-terminal voltage

EN: V-terminal voltage
NL: lijnklemspanning

Definitie EN: terminal voltage,measured between each mains conductor and earth,in a V-network

vacancy defect

EN: vacancy defect
NL: vacature

Definitie EN: a site at which an atom or molecule is missing in the array

vacant-national number signal

EN: vacant-national number signal
NL: signaal van een vrij nummer

Definitie EN: a signal sent in the backward direction indicating that the received national number is not in use

vacuum baking

EN: vacuum baking
NL: verhitten in vacuüm

Definitie EN: heating of semiconductor devices in a completed or part-completed state, or of components to be used in mounting or encapsulation of semiconductor devices, in order to remove adsorbed gas or to cause it to react and become passive; the operating pressures involved are often very high, even by soft-vacuum standards

vacuum cleaner

EN: vacuum cleaner
NL: stofzuiger

Definitie EN: an apparatus which removes dust by suction,the energy being supplied by an electric motor

vacuum evaporation technique

EN: vacuum evaporation technique
NL: vacuüm-opdamptechniek

Definitie EN: technique for the deposition of thin films of metal or other materials on the surface of small objects; evaporation from a boiling source in a hard vacuum to deposit source material on any substrate placed within the vacuum chamber and exposed to the flow of material

vacuum guide

EN: vacuum guide
NL: vacuüm geleider

Definitie EN: a part of the video head assembly used to maintain the tape in the correct position relative to the head wheel by means of a suction system

vacuum lamp

EN: vacuum lamp
NL: vacuümlamp

Definitie EN: an incandescent lamp in which the luminous element operates in an evacuated bulb

vacuum pencil

EN: vacuum pencil, vacuum tweezers
NL: staafje met vastzuigmond

Definitie EN: narrow-bore tubing in a pencil-like holder through which air is sucked by a small vacuum pump

vacuum pencil

EN: vacuum pencil
NL: staafje met vastzuigmond

Definitie EN: narrow-bore tubing in a pencil-like holder through which air is sucked by a small vacuum pump

vacuum pump unit

EN: vacuum pump unit
NL: groep vacuumpompen

Definitie EN: maintains a vacuum in the electron tube; these are sometimes self-contained units connected to the appliance

Definitie NL: geheel om een ruimte waarin zich elektronen voortbewegen, luchtledig te maken; bedoelde pompen zijn soms afzonderlijk opgesteld, maar met het instrument verbonden

vacuum remelting

EN: vacuum remelting
NL: raffinerend vacuümsmelten

Definitie EN: the remelting of metal in a furnace under a controlled vacuum in order to achieve further refinement

vacuum remelting arc furnace

EN: vacuum remelting arc furnace
NL: vacuümraffinageboogoven

Definitie EN: a direct arc furnace in which the arc is maintained between a consumable electrode made of the metal to be refined and the molten charge which is contained in a water-cooled mould,the process taking place in a vacuum chamber

vacuum system

EN: vacuum system
NL: vacuümsysteem

Definitie EN: system for the evacuation of a chamber. Consists of pumps operating by removal or adsorption; may be closed or demountable, producing hard or soft vacuum

vacuum tube

EN: vacuum tube
NL: vacuümbuis

Definitie EN: an electronic tube or device evacuated to such a degree that its electrical characteristics are essentially unaffected by the ionisation of any residual gas or vapour

vacuum-type collector

EN: vacuum-type collector
NL: vacuümcollector

Definitie EN: a high efficiency collector with a vacuum space between absorber and cover in order to reduce convection losses

VAD process

EN: VAD process, outside vapour phase oxidation-axial deposition, Verneuil process
NL: uitwendige opdamptechniek met axiale depositie, axiale opdamptechniek

Definitie EN: process in which the core glass and, sometimes, clad glass soot are simultaneously deposited in an axial direction to form a rod-like soot preform devoid of a central hole

valence bond

EN: valence bond, linked bond, covalent bonding
NL: covalente binding, valentiebinding

Definitie EN: a bond between two atoms in which both atoms share one electron,this electron forming a link between them

valence-band conduction

EN: valence-band conduction
NL: valentiebandgeleiding

Definitie EN: conduction of electricity due to the motion of electrons having energies within the valence band,abstracted into motion of holes for the purpose of simplifying treatments

valence-band level

EN: valence-band level
NL: valentiebandniveau

Definitie EN: energy level contained in the valence band of an insulator or semiconductor,normally occupied by an electron

valence-band maximum

EN: valence-band maximum
NL: maximum van de valentieband

Definitie EN: highest energy states in a valence band; the states occupied by holes when they are present in equilibrium; the maximum occurs at a Brillouin zone centre, at (000)in wavenumber space

valency

EN: valency
NL: valentie, waardigheid

Definitie EN: the charge of an ion expressed as the number of elementary charges which it carries and which take part in the reaction considered

valley current

EN: valley current, tunnel-diode valley current
NL: dalstroom van een tunneldiode

Definitie EN: the magnitude of current in the valley between the peak current and the normal forward characteristic in a tunnel diode,resulting from tunnelling transitions between the edges of the valence and conduction bands which have been extended by heavy impurity doping,and by transitions by way of trapping levels

valve

EN: valve, vacuum tube
NL: ventiel

Definitie EN: a device permitting current flow in one direction only

valve

EN: valve
NL: ventiel

Definitie EN: a device permitting current flow in one direction only

valve blocking

EN: valve blocking
NL: ventielblokkering
NL: blokkeren van een ventiel

Definitie EN: the operation to prevent further firing of a controllable valve or arm by inhibiting the grid or gate pulse

valve reactor

EN: valve reactor
NL: ventielelement-bouweenheid

Definitie EN: a reactor connected in series with a valve

valve rectifier

EN: valve rectifier, electronic tube rectifier
NL: buisgelijkrichter

Definitie EN: a rectifier which makes use of the unidirectional flow of current in a valve

valve rectifier

EN: valve rectifier
NL: buisgelijkrichter

Definitie EN: a rectifier which makes use of the unidirectional flow of current in a valve

valve voltmeter

EN: valve voltmeter
NL: buisvoltmeter

Definitie EN: an instrument for measuring voltage and incorporating thermionic valves,which has a very high input impedance

van Allen belt

EN: van Allen belt
NL: Van Allen-gordel

Definitie EN: one of the belts of ionising radiation surrounding the earth,one centred about 2000 mi(3200km)above the earth,one at about 10,000 mi(16,000 km),and one at about 20,000 mi(32,000km)

van Arkel process

EN: van Arkel process
NL: van-Arkelproces

Definitie EN: thermal decomposition of a volatile compound on an electrically-heated filament; may be used in the preparation of multi-crystalline semiconductor materials

vane attenuator

EN: vane attenuator
NL: vaanverzwakker

Definitie EN: a variable resistive attenuator in rectangular waveguide in which an absorbing plate parallel to the narrow side of the waveguide can be displaced in a direction perpendicular to its plane

vane wattmeter

EN: vane wattmeter
NL: vaanwattmeter

Definitie EN: an instrument for the measurement of power flow in a waveguide making use of the electromechanical forces caused by the electromagnetic field on a metal or dielectric vane or vanes

vapor-tight lighting fitting

EN: vapor-tight lighting fitting, vapour-tight lighting fitting
NL: gasdichte armatuur

Definitie EN: a lighting fitting so constructed that specified vapour or gas cannot enter its enclosure

vaporization

EN: vaporization
NL: verdamping

Definitie EN: The process by which a substance passes from the liquid state to the vapour state.

vapour pump

EN: vapour pump, vapor pump, diffusion pump
NL: diffusiepomp

Definitie EN: a gas pump used to reduce the pressure in an enclosure in which a vacuum process is to take place,to hard-vacuum level

vapour-phase diffusion

EN: vapour-phase diffusion
NL: gasfasediffusie

Definitie EN: mechanism of solid state diffusion of impurity atoms into a semiconductor surface,in which vaporized atoms are carried from source to semiconductor by a carrier gas passing along a furnace tube

vapour-tight lighting fitting

EN: vapour-tight lighting fitting, vapor-tight lighting fitting
NL: gasdichte armatuur

Definitie EN: a lighting fitting so constructed that specified vapour or gas cannot enter its enclosure

vapour-tight lighting fitting

EN: vapour-tight lighting fitting
NL: gasdichte armatuur

Definitie EN: a lighting fitting so constructed that specified vapour or gas cannot enter its enclosure

varactor diode

EN: varactor diode
NL: varactordiode

Definitie EN: a variable-capacitance p-n-junction diode,specifically made for maximum capacitance variation over a particular voltage range

variability of waves

EN: variability of waves
NL: variabiliteit van golven

Definitie EN: The variation of heights and periods between individual waves within a wave train.2)The variation in direction of propagation of waves leaving the generating area.3)The variation in height along the crest. This is usually called " variation along the wave"

variable attenuator

EN: variable attenuator
NL: variabele verzwakker

Definitie EN: an attenuator that reduces the strength of an AC signal either continuously or in steps,without causing appreciable signal distortion,by maintaining a substantially constant impedance match

variable attenuator

EN: variable attenuator, adjustable attenuator, variable optical attenuator
NL: regelbare verzwakker

Definitie EN: an attenuator in which the level of attenuation is varied with an internal adjustment

variable attenuator

EN: variable attenuator, variable optical attenuator, adjustable attenuator
NL: regelbare verzwakker

Definitie EN: an attenuator in which the level of attenuation is varied with an internal adjustment

variable bit-rate system

EN: variable bit-rate system, VBR system
NL: variable bit-rate systeem

Definitie EN: a time-division switching system which,by means of dynamic multiplexing techniques,allocates capacity for each call in accordance with its changing requirements in order to achieve greater efficiency in handling services exhibiting a high peak-to-mean bit rate