22
Safety Instructions
Damage due to non-compliance with these operating instructions leads to the expiry
of warranty! We accept no liability for consequent damage.
We accept no liability for damage to property or injury to persons caused by the mis-
handling of the device or non-compliance with the safety instructions. In such cases
the guarantee will lapse.
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These devices have been designed in compliance with EN61010, safety require-
ments for electronic measuring instruments, and left the factory in perfect condition
in terms of safety engineering. To maintain this status and ensure safe operation,
the user must comply with the safety instructions and warnings contained in these
operating instructions.
Ꮨ
= Caution! Dangerous voltage, do not touch! Danger!
ƽ
= Read the operating instructions!
CAT III = Excess voltage category III for measurements in the building
installation
CAT IV = Excess voltage category IV for measurements at the source of the
low-voltage installation
= Insulation class 2 (double insulated)
- Measurements of currents are only permitted in such electric circuits which them-
selves are secured by 20A and in which the voltages do not exceed 250VAC or
VCD (250V fuse).
- The measuring instruments and circuits are not protected against electric arc
explosions.
- Measuring instruments and accessories should be kept out of the reach of children!
- In commercial institutions, the accident prevention regulations of the Employer’s
Liability Insurance Association for Electrical Systems and Operating Materials are
to be observed.
-
In schools, training centres, computer and self-help workshops, handling of measur-
ing instruments must be supervised by trained personnel in a responsible manner.
- Take particular care when dealing with voltages exceeding 25V alternating current
(AC) or 35V direct current (DC). Even at these voltages it is possible to get a fatal
electric shock if you touch electric conductors. Therefore, first de-energise the
voltage source, connect the measuring instrument to the connections at the volt-
age source to be measured, set the required voltage measurement range at the
measuring instrument, and then switch on the voltage source. When the measure-
ment has been completed, de-energise the voltage source and remove the cables
from the connections at the voltage source.
51
Essai de diodes Ge à GaAs 1 mV
Courant d’essai 1 mA maxi. ; Tension directe maxi. 1,5 V
Fréquence 5 Hz ±(0,1%+3 ch) 0,001 Hz
50 Hz ±(0,1%+3 ch) 0,01 Hz
500 Hz ±(0,1%+3 ch) 0,1 Hz
5 kHz ±(0,1%+3 ch) 0,001kHz
50 kHz ±(0,1%+3 ch) 0,01kHz
500 kHz ±(0,1%+3 ch) 0,1kHz
5 MHz ±(0,1%+3 ch) 0,001MHz
10 MHz ±(0,1%+3 ch) 0,01MHz
Sensibilité supérieure ou égale à env. 300 mVeff de 1 Hz à 1 MHz
Sensibilité supérieure ou égale à env. 600 mVeff de 1 Hz à 10 MHz
Mesure de -40°C à 0°C ±(3,0%+4 ch) 1°C
température 0°C à +400°C ±(1,0%+3 ch) 1°C
+400°C à +1000°C ±(2,0%+10 ch) 1°C
Mesure de température possible avec l’appareil VC-840
C Grandeurs d’entrée maximum
Mesure de la tension: max. 1000 VDC ou 750 VACrms
Mesure du courant: 20 A AC dans la plage A pendant 10 s maxi, suivie d’une
phase de refroidissement d’au moins 15 Min., maxi. 250
VDC/VACrms, protection de surcharge :
fusible instantané 10-A-250-V
400mA AC/DC dans plage mA, maxi. 250 VDC/VACrms,
protection de surcharge : fusible en instantané 0,5-A-
250-V
Mesure de résistance, test de diodes, contrôle de continuité, mesure de fréquence :
max. 1000 Vpeak
Attention !
Un dépassement des grandeurs d’entrée maxi admises entraîne l’endommage-
ment de l’appareil de mesure ou crée des conditions défavorables mettant en
danger la vie de l’utilisateur.
Dans des environnements avec décharge électrostatique élevée (± 4kV) il peut se
produire des dysfonctionnements lors du fonctionnement de l’appareil de mesure.
En cas de dysfonctionnement (signaux confus à l’affichage, etc.), débrancher l’appa-
reil et le remettre en marche (Reset). Eviter de faire fonctionner l’appareil dans de
telles conditions.
