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Voltcraft VC-890 Manual

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118
d) Test / remplacement des fusibles
Les plages de mesure du courant sont protégées par des fusibles HPC. Si la mesure dans cette plage
ne peut être effectuée, le fusible doit être remplacé.
L’appareil de mesure permet de tester les fusibles avec le boîtier fermé.
Pour tester, procédez comme suit :
1. Sélectionnez la plage de mesure « » sur le commutateur
rotatif.
2. Insérez un cordon de mesure dans la douille °CHzV (7).
3. À l’aide de la sonde à tester, effectuez le contact avec la
douille de mesure du courant (Fig. 12).
4. Si une valeur mesurée s’affi che, le fusible est bon. Si en
revanche, « OL » reste affi ché à l’écran, le fusible est
défectueux et doit être remplacé.
Fig. 12
Pour remplacer les fusibles, procédez comme suit :
1. Débrancher les cordons de mesure connectés du circuit de mesure et de votre appareil de
mesure. Éteignez le DMM.
2. Ouvrez le boîtier comme décrit à la partie «c) Ouvrir l’appareil de mesure» (page 117).
3. Remplacez le fusible défectueux par un nouveau fusible du même type et de même intensité de
courant nominal ou de même construction. Les fusibles possèdent les valeurs suivantes :
Fusible F1 F2
Données nominales F600mA H 1000V F10A H 1000V
Puissance de coupure 30 kA
Dimensions (ø x L) 6,35 x 31,8 mm 10,3 x 38 mm
Numéro de commande 44 24 03 44 23 35
4. Refermez de nouveau le boîtier avec précaution.
Il est interdit d´utiliser des fusibles réparés ou de ponter le porte-fusibles. Cela
peut provoquer un incendie ou une explosion en arc. Ne faites jamais fonctionner
l’appareil de mesure lorsqu’il est ouvert.
55
8. DISPLAY INDICATIONS AND SYMBOLS
The symbols and indications vary depending on the model. This is a list of all possible symbols and
indications in the VC890 series.
Delta symbol for relative measurement (= reference measurement)
AUTO Stands for “automatic measuring range selection”
TrueRMS True RMS measurement
Data hold function
Comparison mode
> <
Limiting value specifi cation, measurement must remain between two specifi ed
values
< >
Limiting value specifi cation, measurement must remain outside of two specifi ed
values
Stands for “comparison test not passed”
Stands for “comparison test passed”
View saved data
OL Overload = the measuring range has been exceeded
OFF Switch position “OFF”
Symbol for battery replacement (battery charge low)
Symbol for the diode test
Symbol for the acoustic continuity tester
AC Alternating voltage or current
Maximum measurement
Minimum measurement
Average measurement
Automatic power off activated
Data memory will be deleted
Manual data memory
Automatic data memory
Symbol for data transfer (active interface)
Function switch activated (blue button labelling)
VOID Data memory contains no values
DC Direct voltage or current
mV Millivolt (=0.001 V)
… 53 …


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