Schlumberger 7045 Digital multimeter
Fabricante:
Imagen 1
Modelo:
7045
Fecha:
1978
Categoría:
Grupo:
Descripción:
Información
The 7045 is essentially a voltage measuring device. Where necessary,
multimeter inputs must be converted into a dc voltage level and suitably
scaled prior to analogue to digital conversion. This process is carried out in
the Signal Conditioning Section.
The Analogue to Digital (A-to-D) Converter produces two balanced pulse
trains at its output. Any measured input causes the pulse width of one of the
trains to increase, with a proportionate decrease in the width of the other; the
nett result is processed in the Digital Section of the multimeter.
This section includes a clock circuit. Pulses from the A-to-D Converter provide
a clock-enable to a synchronous Counter, thus a count is produced
proportional to the measured input. The Digital Section also exercises control
over the analogue circuitry with regard to range decision and control of the
measurement function.
Power supplies for the multimeter are derived from a mains operated
transformer with provision made for either 230 volts or 115 volt operation. A
Battery Unit, when fitted with optional cells, provides an alternative power
source.
Manual de servicio
Type manuel:
Manual de servicio
Páginas:
44
Tamaño:
1.61 Mbytes (1683061 Bytes)
Idioma:
english
Revisión:
1
Manuel-ID:
7045011
Fecha:
01 julio 1978
Formato:
Documento Scaneds, en parte leyendo mal, no parcialmente legible.
Fecha de subida:
07 enero 2019
MD5:
da3f8a7ddefb6d88afcbf4dfc4134004
Descargas:
91
Información
CHAPTER 1
Presentation of Information 1. l
Servicing Information 1.1
Functional Breakdown 1.2
Summary of Operation 1.2
Functional Block Diagram 1.3
CHAPTER2
Signal Conditioning 2.1
A-to-D Converter 2.6
Digital Section 2.6
Power Supplies 2.10
CHAPTER 3
Preliminaries 3.
Setting-up procedures 3.2
Calibration procedures -3.5
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