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Voltcraft VC-890 Manual

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8. The “OFF” setting turns the display off if the device is not operated for 5 minutes. Only the symbol
and the memory number are displayed. If the device is continually saving measured
values (“OVERWRITE” setting) and “1000” measured values are exceeded, a blinking infi nity
symbol “” is displayed below
.
9. By default, the device is set to “OFF”.
10. Hold down the SHIFT/SETUP button for approx. 2 sec to save the setting and exit the SETUP
menu. You will also exit SHIFT mode.
When the display is switched off in energy saving mode, turn the rotary switch or press any
button (apart from the
-button (9)) to turn it back on.
Viewing saved measured values:
1. With the measuring device switched on, hold down the SHIFT/SETUP button (3) for approx. 2 s.
will appear on the display. You are now in SHIFT mode.
2. Now press the MAX/MIN (View/) button (10b) to switch to the display mode.
will appear
on the display with the fi rst memory number “0001” below it. The saved measured value is shown
in the centre of the display.
3. Press the H/LIGHT (+/COMP) or RANGE (-) buttons to show the individual records.
4. Press the MAX/MIN (View/) button again to exit the display mode.
5. Press the SHIFT/SETUP button to exit the SHIFT mode.
The stored measured values of a comparison measurement are shown in the display with the
symbols
and .
If “VOID” appears in the display, that means that the measured value memory is empty.
Deleting saved measured values:
1. With the measuring device switched on, hold down the SHIFT/SETUP button (3) for approx. 2 s.
will appear on the display. You are now in SHIFT mode.
2. Hold down the MAX/MIN (View/) button (10b) for approx. 2 s. The indication
and “VOID”
will briefl y appear on the display. All measured values are deleted.
3. Press the SHIFT/SETUP button to exit the SHIFT mode.
101
3. Raccordez à présent les deux pointes de mesure à l´objet à mesurer (générateur, circuit, etc.).
4. La valeur mesurée est indiquée à l’écran.
5. À la fi n de la mesure, retirez les cordons de mesure de l’objet à mesurer et éteignez le DMM.
c) Mesure du courant « A »
Ne dépassez en aucun cas les grandeurs d´entrée maximales autorisées. Ne
touchez aucun circuit ou aucune partie des circuits présentant des tensions
supérieures à 25 V ACrms ou à 35 V DC ! Danger de mort !
La tension max. admissible dans le circuit de mesure du courant ne doit pas
dépasser 1000 V en CAT III. Les mesures > 5 A doivent être effectuées uniquement
pour max. 10 secondes, et uniquement dans un intervalle de 10 minutes.
Commencez toujours la mesure du courant avec la plus grande plage de mesure et changez
éventuellement pour une plus petite plage de mesure. Avant de changer la plage de mesure,
coupez toujours l’alimentation du circuit. Toutes les plages de mesure du courant sont
protégées par fusible et disposent donc d’un dispositif de sécurité contre les surcharges.
Pour mesurer les courants continus (A
), procédez comme suit :
1. Allumez le DMM et sélectionnez la plage de valeur « A
»,
« mA
» ou « A ».
2. Le tableau indique les différentes fonctions de mesure et
les plages de mesure disponibles. Sélectionnez la plage de
mesure et les douilles de mesure correspondantes.
Fonction de
mesure
Plage de mesure Douilles de
mesure
A 0,01 A - 6000 A COM + mAA
mA 0,001 mA - 600 mA COM + mAA
10A 0,001 A - 10 A COM + 10A
3. Raccordez le cordon de mesure rouge à la douille de mesure
mAA ou 10A (5, 6). Raccordez le cordon de mesure noir à
la douille de mesure COM (8) (Fig. 3).
4. Raccordez les deux pointes de mesure en série à l’objet à
mesurer (pile, circuit etc.) ; la polarité respective de la valeur
mesurée s’affi che à l’écran avec la mesure momentanée.
Fig. 3
Dès qu’un signe négatif « - » précède la valeur de mesure de courant continu, le courant circule
à l’opposé (ou les cordons de mesure sont inversés).
5. À la fi n de la mesure, retirez les cordons de mesure de l’objet à mesurer et éteignez le DMM.
… 70 …


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