Manual Voltcraft VC-890 (page 60 of 84) (English, German, Dutch, French)

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e) Resistance measurement

Make sure that all circuit parts, switches and components, and other objects of

measurement are disconnected from the voltage and discharged at all times.

Proceed as follows to measure resistance:

1. Turn on the DMM and select the measuring range “”.

2. Insert the red test lead in the °CHzV measuring socket (7),

the black test lead in the COM measuring socket (8) (Fig. 5).

3. Check the test leads for continuity by connecting the test

prods with one another. After that the resistance value must be

approximately 0 – 1.5  (inherent resistance of the test leads).

4. For low-resistance measurements, press the REL/PC

(Log/) button (10c) to prevent the inherent resistance of the

test leads from being included in the subsequent resistance

measurement. The delta symbol

appears on the display

and 0  is indicated. The automatic range selection (AUTO) is

deactivated. The base value (Rel difference) is displayed next

to the delta symbol

Fig. 5

5. Now connect the two test prods with the object to be measured. As long as the object to be

measured is not high-resistive or interrupted, the measured value will be indicated on the display.

Wait until the display has stabilised. This can take a few seconds for resistances >1 M.

6. If “OL” (for overload) appears on the display, your measurement is above the measuring range

or the measurement circuit is broken. Pressing the REL/PC (Log/) button again turns off the

relative function and activates the autorange function.

7. After the measurement has been completed, remove the test leads from the object being

measured and turn the DMM off.

When you carry out a resistance measurement, make sure that the measuring points which you

contact with the measuring prods are free from dirt, oil, soldering varnish or similar. An incorrect

measurement may result under such circumstances.

f) Diode test

Make sure that all circuit parts, switches and components, and other objects of

measurement are disconnected from the voltage and discharged at all times.

111

18. ENREGISTREMENT ET GESTION

DES VALEURS MESURÉES

Grâce à sa fonction d’enregistrement des données, le multimètre numérique VC890 peut enregistrer

jusqu’à 1000 valeurs mesurées.

Pour enregistrer manuellement les valeurs mesurées, procédez comme suit :

1. Alors que votre appareil de mesure est allumé, maintenez la touche SHIFT/SETUP (3) enfoncée

pendant env. 2 s. L’écran afﬁ che

. Vous vous trouvez maintenant dans le mode SHIFT.

2. Appuyez maintenant sur la touche REL/PC (Log/) (10c), pour enregistrer la valeur mesurée actuelle.

L’écran afﬁ che le symbole

et au-dessous, le premier numéro d’enregistrement « 0001 ».

3. Pour enregistrer une autre valeur, appuyez encore une fois sur la touche REL/PC (Log/). Le

deuxième numéro d’enregistrement « 0002 » s’afﬁ che.

4. Pour quitter le mode SHIFT, appuyez sur la touche SHIFT/SETUP.

Si vous n‘enregistrez pas de valeur pendant env. 3 secondes, le symbole et le numéro

d‘enregistrement disparaissent. Appuyez une nouvelle fois sur la touche REL/PC (Log/) pour

enregistrer d‘autres valeurs. Le symbole

et le numéro d‘enregistrement s‘afﬁ chent à

nouveau à l‘écran.

Enregistrer automatiquement les valeurs de mesure :

1. Dans le menu SETUP, sélectionnez en premier la fréquence d’enregistrement souhaitée. À la

livraison, l’appareil est réglé en usine pour enregistrer une valeur mesurée par seconde.

2. Alors que l’appareil est allumé, maintenez la touche SHIFT/SETUP (3) enfoncée pendant env. 2 s.

L’écran afﬁ che

. Vous vous trouvez maintenant dans le mode SHIFT.

3. Maintenez la touche SHIFT/SETUP à nouveau enfoncée pendant env. 2 s pour ouvrir le menu

SETUP.

4. Appuyez plusieurs fois sur la touche SHIFT/SETUP, jusqu’à ce que l’option « LOGGER

SAMPLING RATE » soit sélectionnée. Un symbole en forme d’étoile * à gauche de l’option indique

que l’option est sélectionnée.

5. Appuyez sur les touches H/LIGHT (+/COMP) ou RANGE (-) pour régler la fréquence

d’enregistrement (plage de réglage : 1 à 10 secondes).

6. Maintenez la touche SHIFT/SETUP enfoncée pendant env. 2 s pour enregistrer la sélection et

quitter le menu SETUP.

7. Pour enregistrer des mesures, vous devez commuter vers le mode SHIFT. Alors que l’appareil

est allumé, maintenez la touche SHIFT/SETUP (3) enfoncée pendant env. 2 s, jusqu’à ce que

l’écran afﬁ che

8. Maintenez la touche REL/PC (Log/) enfoncée pendant env. 2 s pour lancer l’enregistrement

automatique. L’écran afﬁ che le symbole

et au-dessous, le numéro d’enregistrement.

L’appareil enregistre maintenant les valeurs mesurées à la fréquence d’enregistrement que vous

avez déterminée.

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Voltcraft VC-890 Manual

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