Aperçu élémentaire d'un MN

En se servant de son multimètre numérique, il y a un certain nombre d'expressions et de fonctions élémentaires qu'un technicien devrait connaître. Voici une liste de quelques-uns des termes courants que vous rencontrerez probablement en travaillant avec les MN.

Précision - An indicator of how close the DMM's displayed measurement is to the actual value of the signal being measured. It is expressed as a percentage of reading or of full scale or a combination of both.

Annonciateur - A symbol that identifies a selected range or function and shows at a glance what is being measured (volts, ohms, etc.)

Sélection automatique de plage - A DMM feature that automatically selects proper measurement ranges

MN à réponse moyenne - A DMM that accurately measures sinusoidal waveforms, but is not as accurate measuring non-sinusoidal waveforms.

Compte - A number that specifies a DMM's resolution.

Shunt de courant - A low-value resistor in a DMM for measuring current.

Formes d'ondes non sinusoïdales - Distorted sine waves or waveforms such as a pulse train, square waves, triangular waves and sawtooth waves.

Résolution - The degree to which small changes in a measurement can be displayed.

Valeur efficace (RMS) - The equivalent dc value of an ac waveform.

MN à vraie valeur efficace - A DMM that can accurately measure both sinusoidal and non-sinusoidal waveforms.

TouchHold® - A Fluke feature that freezes the display on stable readings to allow for hands-free measurement and viewing.