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Introduction
Dear Customer,
In purchasing this Voltcraft® product, you have made a very good decision for which
we should like to thank you.
You have acquired an above-average quality product from a brand family which has
distinguished itself in the field of measuring, charging and network technology by
particular competence and permanent innovation. With Voltcraft®, you will be able
to cope even with difficult tasks as an ambitious hobbyist just as much as a profes-
sional user. Voltcraft® offers you reliable technology at an extraordinarily favourable
cost-performance ratio. We are certain: Your start with Voltcraft will at the same time
be the commencement of a long and profitable co-operation. We wish you much
enjoyment with your new Voltcraft® product!
With the Digital Multimeter (DMM) VC-820 or VC-840, you have purchased a high-
precision universal measuring instrument designed in accordance with the latest
state of the art. Apart from the common functions such as direct voltage, alternating
voltage and AC/DC measurements or resistance measurement, diode test or conti-
nuity check and frequency measurement, the VC-820 is provided with a µA measur-
ing range. In addition to this, the VC-840 can be used for measuring temperatures in
the range of between -40°C and +1000°C. Moreover, the VC-840 measures the true
effective value (True Rms) when measuring alternating voltages and currents.
The measuring instruments and lines are tested for their safety according to
EN61010. Moreover, they are EMC tested and meet the requirements of applic-
able European and national regulations. Proof of conformity has been submit-
ted and can be obtained from the manufacturer.
To maintain the specifications and to ensure risk-free operation, the user should
comply with the following operating instructions!
Intended Use
- Measuring direct voltages up to a maximum of 1000VDC
- Measuring alternating voltages up to a maximum of 750VACrms (VC-840: True
Rms)
- Measuring direct or alternating currents up to a maximum of 20A, for a maximum
period of 10s with pauses of 15min between the single measurements
- Measuring capacities of up to a maximum of 100µF
- Measuring frequencies of up to 10MHz and measuring the pulse-pause-ratio (duty
cycle, informative)
- Measuring resistance values up to a maximum of 40 MOhm
- Testing diodes and checking the acoustic continuity
- Measuring temperatures (only VC-840) up to a maximum of +1000°C
- Overvoltage category CAT III 1000V, CAT IV 600V
53
Ander gebruik dan eerder beschreven, leidt tot beschadiging van het meetapparaat/de
meetapparaten, bovendien zijn hiermee gevaren, zoals bv. kortsluiting, brand, elektri-
sche schok, enz. verbonden. Het totale product mag niet worden gewijzigd resp. wor-
den omgebouwd!De veiligheidsrichtlijnen dienen altijd in acht te worden genomen!
Instelelementen
Afb. zie uitklappagina
1. LCD-display bestaande uit 3
3
/
4
cijfers en weergave van de functies en maateen-
heden
2. Drukknoppenveld met de functietoetsen 2a "RANGE" (handmatige bereikkeuze),
2b "Hz %" (omschakeling van frequentiemeting naar duty-cycle), 2 c "REL"
(Relatief = meting referentiewaarde) en 2 d "HOLD H" (vasthouden)
3. Knop "POWER" voor meetapparaat aan/ uit
4. Knop voor de subfuncties (in kleur aangegeven)
5. 20-A-ingang Deze meetingang is beveiligd met 10A (-zekering) en goedgekeurd
voor gelijk- en wisselstromen tot max. 20 A (max. 10 s lang met 15 min. pauze
tussen de metingen).
6. mA-ingang Op deze ingang kunnen gelijk- en wisselstromen tot max. 400 mA
worden gemeten (beveiligd met een sterke 0,5 A - zekering). Bovendien betekent
bij de VC-840 deze ingang de pluspool bij de temperatuurmeting.
7. Hz/V/Ohm – ingangsbus (= plusaansluiting)
8. COM – ingangsbus (COM – resp. minaansluiting)
9. Deksel van batterijcompartiment
10. Seriële RS - 232C – infraroodinterface (eenzijdig gevoelig) voor de aansluiting /
die gegevensoverdracht op/ naar een PC
11. Draaischakelaar voor de instelling van de meetfuncties
Inhoudsopgave
Inleiding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Juist gebruik . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Instelelementen (Uitklappagina) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Inhoudsopgave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Veiligheidsrichtlijnen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Bediening, inbedrijfstelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Uitvoeren van metingen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Onderhoud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Verwijderen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Oplossen van storingen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Technische gegevens, meettoleranties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
20


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