Manual Metrix MX 20 (page 23 of 68) (English, German, French)

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MX 20

3.4.5 MESURE DES COURANTS CONTINUS3.4.5 MESURE DES COURANTS CONTINUS

3.4.5 MESURE DES COURANTS CONTINUS

- La mesure des courants ne s’effectue pas en mode de change-

ment de calibre automatique.

- Relier le cordon noir à la borne COM et le cordon rouge soit à la

borne mA pour mesurer des courants < 200 mA, soit à la borne A

pour mesurer des courants jusqu’à 10 A.

- Il est conseillé de choisir au départ le calibre le plus élevé possible

(10A), lorsque l’ordre de grandeur du courant à mesurer n’est pas

connu. Pour ce faire, amener le commutateur rotatif à la position

10A correspondante et choisir la borne d'entrée 10A.

· Ne relier le multimètre en série dans le circuit à mesurer qu’au

dernier moment, et enfin mettre en service le circuit à mesurer.

· Si le calibre choisi est trop élevé, couper d’abord l’alimentation du

circuit mesuré, ensuite changer la position du commutateur rotatif

et la borne d'entrée, et remettre le circuit en service.

Ne jamais changer de calibre en cours de mesure, ni déconnecter

les cordons de mesure: des extra-courants de commutation et des

surtensions peuvent prendre naissance, qui risquent d’endomma-

ger le multimètre ou de provoquer des ruptures intempestives des

fusibles.

· Afin de limiter tout échauffement et d’éviter les dérives thermi-

ques, il est conseillé de limiter le temps de mesure des courants

forts (10A) à quelques dizaines de secondes.

3.4.6 MESURE DES COURANTS ALTERNATIFS3.4.6 MESURE DES COURANTS ALTERNATIFS

3.4.6 MESURE DES COURANTS ALTERNATIFS

· La mesure des courants ne s’effectue pas en mode de change-

ment de calibre automatique.

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Metrix MX 20 Manual

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