Equipment information:

BBC Goerz Metrawatt Metravo 4D Digital multimeter
Manufacturer:
BBC Goerz Metrawatt
Model: Metravo 4D
Date: 1978
Category: Measurement instruments
Group: Digital multimeter
Description:
Information:
                                    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.

These manuals are available for the above equipment:

BBC Goerz Metrawatt -- Metravo 4D -- User Manual
File name: BBCGoerzMetrawatt-6571-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 27
Size: 4.02 Mbytes (4216939 Bytes)
Language: english
Revision:
Manual-ID/Number: 3.348.252.03
Date: June 1978
Quality: Scanned document, all readable.
Upload date:
MD5: c89e5309979c4a64c93ca68b8d13519c
ed2kID: e341a4c36f2c097609e3ce2bb978adb3
Downloads: 153 since 07 March 2015
Information:
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
BBCGoerzMetrawatt-6571-Manual-Page-1-Picture
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BBC Goerz Metrawatt -- Metravo 4D -- Service Manual
File name: BBCGoerzMetrawatt-6575-Manual-Page-1-Picture
Manual Type: Service Manual
Pages: 18
Size: 400.01 Kbytes (409611 Bytes)
Language: german
Revision:
Manual-ID/Number: 3.338.038.03
Date: April 1979
Quality: Scanned document, all readable.
Upload date:
MD5: 270f0d1b14eda334fb005042913a6357
ed2kID: 6542cb701eeed647d4b0cbdf083da58a
Downloads: 128 since 07 March 2015
Information:
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
BBCGoerzMetrawatt-6575-Manual-Page-1-Picture
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