BBC Goerz Metrawatt Metravo 4D Digital Multimeter
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Modell:
Metravo 4D
Datum:
1978
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The METRAVO 4 D is a digitally indicating multimeter featuring liquid crystal display. It offers a plurality of applications in the field of electronics, e.g. in research and development, in production, operation, test rooms and service. It features a constant input resistance of 10 MO 100 pF on all voltage measuring ranges. On 26 measuring ranges, it measures DC and AC voltages up to 650 V, DC and AC currents up to 10 A (temporarily up to 20 A), and resistances up to 20 MQ. Several well-tuned protective means protect the instrument against damage through improper handling and overload: — Overdimensioned precision resistors — Melting fuse in conjunction with protective power diodes — Overvoltage arrester. The rugged design of the METRAVO 4 D, particularly in conjunction with the rubber bag, assures extreme protec- • • tion in case of rough mechanical application. The METRAVO 4 D is fitted with a liquid crystal display i » * (LCD), the high contrast of which is also maintained in environments of very bright light. The instrument operates mains-independent on commercially available Mignon cells. Thanks to the electronic components in LSI technique and the liquid crystal display, current consumption is extraordinarily low so that a long life of a set of batteries is assured. 5 The measuring instrument is constructed to comply with the safety rules of VDE0411 and, if handled with care, assures protection against hazards of electric shocks which is required by VDE 0110 and DIN 40 050.

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Serviceanleitung
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Serviceanleitung
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german
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3.338.038.03
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1. ALLGEMEINES ... 2 2. FUNKTIONSBESCHREIBUNG ... 2 3. BESONDERE HINWEISE ... 3 3.1. Schutzmaßnahmen ... 3 3.2. Einbauhinweise ... 3 4. ABGLEICHHINWEISE ... 3 4.1. Verwendete Meßmittel ... 3 4.2. Abgleich der Strommeßbereiche ... 4 4.3. Abgleich Meßbereich 200 mV- ... 5 4.4. Abgleich Meßbereich 200 mV'*' ... 5 4.5. Abgleich Meßbereich 2 k£ ... 5 4.6. Kontrolle des Uberlastschutzes ... 5 5. ABBILDUNGEN Schaltbild ... 6 Gesamtansicht ... 7 Leiterplatte 100 bestückt ... 8 Leiterplatte 200 bestückt ... 9 6. BAUTEILLISTEN Mechanische Bauteil liste ... 10 Elektrische Bauteil liste ... 12

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Bedienungsanleitung
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Bedienungsanleitung
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27
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4.02 Mbytes (4216939 Bytes)
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english
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Dokument-ID:
3.348.252.03
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Qualität:
Gescanntes Dokument, alles ist lesbar.
Upload Datum:
2015 03 07
MD5:
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Downloads:
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Metravo 4D Operating instructions 1. Description ... 5 1.1 General ... 5 1.2 Theory of operation ... 6 2. Specifications ... 8 3. Overload protection ... 13 3.1 Internal r e s is ta n c e ... 13 3.2 Melting fuse and protective diodes ... 13 3.3 Overvoltage arrester ... 14 4. Operation ... 14 4.1 Start-up ... 14 4.2 Information on using the instrument ... 15 4.3 Voltage measurement ... 17 4.3.1 DC and AC voltages up to 650 V ... 17 4.3.2 DC voltages up to 30 kV ... 17 4.4 Current measurement ... 18 4.4.1 DC and AC currents up to 2 A ... 19 4.4.2 DC and AC currents up to 10 A ... 19 4.4.3 DC and AC currents above 10 A ... 19 4.4.4 AC currents with (split-core) current transformers ... 20 4.5 Measurement of composite voltages and composite currents ... 21 4.5.1 Measurement of DC voltage and DC current with superimposed AC c o m p o n e n t ... 21 4.5.2 Measurement of AC voltage with superimposed DC voltage ... 22 4.5.3 Measurement of AC current with superimposed DC current ... 22 4.6 Resistance m e a s u rem e n t ... 22 5. Maintenance ... 23 5.1 Batteries ... 24 5.2 Melting fuse . ... 24 5.3 Case ... 25 6. Repair and replacement part service ... 25

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