Schlumberger 7045 Digital multimeter
Fabricant:
Modèle:
7045
Date:
1978
Catégorie:
Groupe:
Description:
Information
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.

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manuel de réparation
Type manuel:
manuel de réparation
Pages:
44
Taille:
1.61 Mbytes (1683061 Bytes)
Langue:
english
Révision:
1
Manuel-ID:
7045011
Date:
01 juillet 1978
Qualité:
Document scanné, la lecture en partie mal, en partie illisible.
Date de transfert:
07 janvier 2019
MD5:
da3f8a7ddefb6d88afcbf4dfc4134004
Téléchargements:
90
Information
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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