Schlumberger 7144 Digital multimeter
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Model:
7144
Date:
1977
Category:
Group:
Description:
BCD Output Module
Information
INTRODUCTION
The 7054.7144 BCD Output Module is used on the 7054 and 7144 DMM, the
difference in their scale lengths being catered for by a set of links on the
Module pcb. A common pcb is used for both types of instrument, Solartron
Part Number 70509004.
The BCD Output Module provides an isolated parallel BCD output from the
7054 7144/DMM, consisting of the magnitude, and the range (in BCD code).
The DMM mode is manually selected and is therefore not programmable.
The BCD Output Module operates in the normal sample/print command
closed loop mode, generally associated with a system incorporating a
Recorder (Teleprinter, Typewriter, etc.) and its Drive Unit, or similar devices
which provide the necessary TTL compatible input/output. The following
equipment is recommended for use with the 7054.7144 DMM.
Solartron A290 RECORDER DRIVE UNIT
Provides a simple recording system, the RDU controlling the DMM and driving
the desired recording device.
Solartron A226 PROGRAMMER
Provides the facilities of a 10 channel scanning system with high and low limit
detection. Can also be supplemented by the A290 RDU.
The Module provides complete isolation between the DMM and the
peripheral, and removal of the BCD Output Module from the DMM has no
significant affect on the latter’s performance.
Manual type:
Service Manual
Pages:
40
Size:
12.49 Mbytes (13099494 Bytes)
Language:
english
Revision:
2
Manual ID:
70540030
Date:
1977 12 01
Quality:
Scanned document, all readable.
Upload date:
2019 01 07
MD5:
90fae34221a909b825720ab2ad6e43f1
Downloads:
1008
Information
SECTION 1 GENERAL INTRODUCTION 1.1
SECTION 2 OPERATION
Preliminary Checks 2.1
Operation 2.2
SECTION 3 SERVICING
Introduction 3.1
Presentation of Information 3.1
Basic Logic Elements 3.2
Salient Features of PCB 3.3
Functional Description 3.4
Test Waveforms 3.5 Circuit Descriptions
Floating Section 3a. 1
Earthy Section 3b. 1
Cable Adaptors 70505/71405 3b.5
SECTION 4 FUNCTIONAL CHECKS 4.1
SECTION 5 PARTS LIST 5.1
SECTION 6 SPECIFICATIONS 6.1