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EVM892
29.04.2010 ©Velleman nv
37
Mesure de fréquences
Ne pas mesurer la fréquence d’un circuit ayant une tension > 250 V.
Ê
tre extrêmement prudent lors d’une mesure d’une tension > 60 VCC ou
30 VCA RMS. Toujours placer vos doigts derrière la protection des sondes
de mesure !
Insérer la sonde noire dans la prise « COM » et la sonde rouge dans la prise
« VHz ».
Choisir la gamme « 20kHz » avec le sélecteur.
Connecter les sondes au circuit à tester.
Lire la valeur affichée.
Remarque :
Utiliser un câble blindé pour les mesures de petits signaux dans un
environnement bruyant (amplitude visible min. : 0,7 Vpp).
10. Spécifications
Cet appareil n’est pas étalonné par défaut !
Consignes concernant l’environnement d’utilisation :
N’utiliser ce multimètre que dans un environnement CAT I et CAT II (voir §4).
N’utiliser ce multimètre que dans un environnement avec degré de pollution 2
(voir §5).
température 23°C
taux d’humidité relative idéal 75%
altitude max. 2000 m
catégorie surtension/installation 600 V CAT. II
degré de pollution degré de pollution 2
tension max. entre la connexion
et la terre
600 VCC ou 600 V rms CA (sinusoïde)
afficheur LCD à 3 ½ digits, 2 à 3 affichages par sec.
protection par fusible
plage 200 mA : F 0.2A/250V réarmable
plage 10 A : F10 A/250 V
alimentation
pile 9 V 6LF22 (n’utiliser que des piles non
rechargeables)
sélection de plage manuelle
indication de polarité affichage « - »
indication hors plage affichage automatique « 1 »
indication de pile usée affichage « »
température de travail 0°C à 40°C
température de stockage -10°C à 50°C
dimensions 88 x 170 x 38 mm
poids 340 g (pile incl.)
37


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