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Schlumberger 7062 Digital multimeter
Manufacturer:
Model:
7062
Date:
1988
Class:
Type:
SubType:
SYSTEMS VOLTMETERS
Information
The 7061 System Voltmeter contains four printed circuit boards (PCBs) which contain the electronic circuitry. Additional option boards may also be fitted. All inputs to the instrument are converted to a dc voltage level and then transformed into time analog pulse trains on PCB 15. On PCB 13, the analog pulse trains are digitised into discrete, equal length time units, which are counted and passed to the display board, PCB 1, for display. The display provides a numerical indication of the input value measured.

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Service Manual
Manual type:
Service Manual
Pages:
196
Size:
7.32 Mbytes (7672978 Bytes)
Language:
english
Revision:
Issue F
Manual-ID:
70610011
Date:
September 1988
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
21 November 2015
MD5:
eaa48c9c12270857530b98a33ec130be
Downloads:
853
Information
1 Introduction 1.3 2 Simplified Block Diagram Description 1.3 2.1 General Description 1.3 2.2 PCB15 Simplified Description 1.3: 2.3 PCB 13 Simplified Description 1.4 2.4 PCB 8 Simplified Description 1.5 2.5 PCB 1 Simplified Description 1.5 3 Circuit Description 1.5 3.1 Introduction .1.5 ; 4 PCB 1 Display Board l.S 5 PCB 13 (Digital Board) and PCB 8 (Oscillator) 1.8 5.1 Introduction 1.8 5.2 MPU and Memory 1.8 5.2.1 Microprocessor 1.8 5.2.2 Address Decoders 1.10 - 5.2.3 Power Fail Detect Circuit 1.10 5.2.4 Test Points 1.12.;. 5.3 General Input/Output 1.12. . 5.3.1 GPIB Interface 1.12,. 5.3.2 Keyboard Interface 1.14 5.3.3 Display Interface 1 '.4 5.3.4 Peripheral Interface Adaptor 1.14·.;. 5.4 Glug Counters and Latches 1.15 .. 5.4.1 Glug Digitisation 1.36· 5.4.2 f/2f Counter Chain 1.16?. . 5.4.3 Glug Latches 1.16- 5.4.4 Test Points ! Γ7 5.5 Floating I/O and Clock 1.17 5.5.1 Clock Oscillator 1.17 5.5.2 Clock Divider 1.17' 5.5.3 Floating I/O 1.19 5.5.4 Test Points 1.1$ 5.6 Power supply 1.2Ü- 5.6.1 Earthy Power supply 1.2®, 5.6.2 Test Points 1.2S- 6 PCB 15 (Analog Board) 1.21 6.1 Introduction 1.21 6.2 Input Switching, DC Volts Attenuator and Current 1.21 6.2.1 Input Switching 1.21 6,2.2 DC Volts Attenuator 1.21 6,2.3 DC Input 1.22 6.2.4 Current Input 1.22 6.2.5 Ohms 1.22 6.2,6 Reference Input 1,22 6.2.7 +10 Volt Reference 1.22 6.3 DC Input Amplifier 1.22 6.3.1 DC Input Amplifier Test Points 1.23 6.4 DC Ranging 1.23 6.5 Integrator 1.23 6.5.1 Test Points 1.27 6.6 Reference 1,27 6.6.1 Test Points 1.27 6.7 Ohms Current source 1.28 6.8 AC True RMS Convertor 1.28 6.9 Floating Logic 1.29 6.10 Floating Power Supply- 1.29 6.10.1 Test Points 1.29 2 MAINTENANCE 1 Introduction 2.5 2 General Maintenance 2.5 2.1 Cleaning Instructions 2.5 2.2 Inspection 2.5 2.3 Voltage Selection 2.6 2.4 Fuses 2.8 3 Performance Verification 2.9 3.1 Introduction 2.9 3.2 Self Test 2.9 3.3 Manual Performance Test 2.10 4 Calibration /7061 and(7062) 2.12 4.1 Introduction 2.12 4.2 Preparation 2.12 4.3 7061 Calibration 2.13 4.3.1 Zero Calibration 2.13 4.3.2 Resistance Calibration 2.13 4.3.3 DC Voltage Calibration 2.14 4.3.4 AC Voltage Calibration 2,15 4.3.5 AC + DC Voltage Calibration 2.16 4.3.6 DC Current Calibration 2.20 4.3.7 AC Current Calibration 2.20 4.3.8 AC + DC Current Calibration 2.21 4.3.9 Calibrate Refresh 2.22 4.3.10 Calibrate Date - 2.22 4.4 7062 Calibration 2.23 4.4.1 Zero Calibration 2.23 4.4.2 Resistance Calibration 2.24 4.4.3 DC Voltage Calibration 2.24 4.4.4 AC Voltage Calibration 2.25 4.4.5 AC + DC Voltage Calibration 2.27 4.4.6 DC Current Calibration 2.28 4.4.7 AC Current Calibration 2.28 4.4.8 AC + DC Current Calibration 2.29 4.4.9 Calibrate Refresh 2.30 4.4.10 Calibrate Date 2.30 5 Troubleshooting 2.31 5.1 Introduction 2.31 5.2 Troubleshooting Sequence 2.31 5.3 Glug Death 2.31 5.4 Integration Check 2.31 5.5 RAM Checksum 2.34 5.6 Input Amplifier and DC Ranging Check 2.35 6 Disassembly 2.36 6.1 Introduction 2.36 6.2 Top and Bottom Cover Removal 2.37 6.3 Front Panel Removal 2.37 6.4 PCB 1 (Display Board) Removal 2.37 6.5 Switch Assembly Removal 2.37 6.6 Beeper Removal 2.37 6.7 Front Panel Component Removal 2.38 6.8 Rear Panel and Rear Panel Component Removal 2.38 6.9 PCB 8 (Oscillator Board) Removal 2.45 6.10 PCB 13 (Digital Board) Removal 2.45 6.11 PCB 15 (Analogue Board) Removal 2.45 6.12 Mains Transformer Removal 2.46 6.13 Handle Removal 2.46 6.14 Battery Removal 2.46 6.15 Chassis and Moulding Replacement 2.48 7 Repair 2.50 7.1 General 2.50 7.2 Reference Diode Replacement 2.50 8 Reassembly 2.51 8.1 General 2.51 8.2 PCB 15 Replacement 2.51 8.3 PCB 13 Replacement 2.52 8.4 PCB 8 Replacement 2.53 8.5 PCB 1 Replacement 2.53 8.6 Front and Rear Panel Component Replacement 2.53 9 Test After Repair 2.56 9.1 General 2.56 CHAPTER 3 LIST OF REPLACEABLE PARTS 1 Introduction 3.3 2 Ordering Spare Parts 3.3 3 Exploded Views 3.3 4 PCB Parts Lists (Refer to Tables) 3.3 CHAPTER 4 GENERAL INFORMATION 1 Introduction 4.3 2 Tools for Service and Set-up 4.3 3 Storage 4.3 4 7061 7062/Test Specification 4.4 4.1 Initial Checks 4.4 4.2 PSU and Digital Checks 4.5 4.3 Analogue Cheeks 4.6 4.4 Performance Checks 4.7 4.5 60Hz Operation 4.9 3.34 PCB 5 Parts List, Floating Logic 3.61 3.35 PCB 5 Parts List, Floating Power supply 3.62 3.36 PCB 5 Parts List, Miscellaneous 3.63 1 Introduction 4.3 2 Tools for Service and Set-up 4.3 3 Storage 4.3 4 7061 7062/Test Specification 4.4 4.1 Initial Checks 4.4 4.2 PSU and Digital Checks 4.5 4.3 Analogue Checks 4.6 4.4 Performance Checks 4.7 4.5 60Hz Operation 4.9 CHAPTER 5 7061 OPTIONS 1 Introduction 5.3 2 70612A; Scanner Option 5.4 2.1 Installation 5.4 3 70613A; Memory Expansion Option 5.5 3.1 Installation 5.6 4 70615A; Mate (CIIL) Software Option 5.7 4.1 Installation 5.7 5 70616A; Self Test Option 5.8 5.1 Installation 5.8 6 70616B; Status Monitor Relay Option 5.9 6.1 Installation 5.10 7 70616C; Crystal Clock Option 7.1 Installation 5.12 CHAPTER 6 SCHEMATIC DIAGRAMS Is Missing!!!!!!

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