Datron Instruments 1062 Digitale multimeter
Fabrikant:
Model:
1062
Datum:
1985
Categorie:
Groep:
Omschrijving:
5½ digit AUTOCAL Multimeter

Informatie

The Datron 1061 1061A and 1071 AUTOCAL multi-function, microprocessor controlled digital voltmeters (DVM) are high precision measuring instruments featuring exceptionally high stability and systems capability. The basic instrument provides full DC measurement capability, computation facilities, self check routines and calibration memory. The 1061 instrument combines high accuracy with short measurement time to maximize auability. A 5½ digit display provides a resolution of one microvolt and an accuracy of 5ppm.

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Servicehandboek
Handleidingen type:
Servicehandboek
Pagina’s:
202
Grootte:
79.53 Mbytes (83392725 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
850045
Datum:
1984 01 01
Kwaliteit:
Gescand document alle leesbaar.
Upload datum:
2017 09 24
MD5:
505962e8482e0150e9e08e923f47b917
Downloads:
2504

Informatie

Calibration and Servicing Handbook GENERAL DESCRIPTION ... INSTALLATION ... I Refer to MEASUREMENT PROCEDURES ... i SPECIFICATION AND SPECIFICATION VERIFICATION ... I User's Handbook SYSTEMS APPLICATIONS ... ) Section Title Page 1 CALIBRATION ... 1 1.1 INTRODUCTION ... 1 1.1.1 General ... 1 1.1.2 Essentials for Good Calibration ... 1 1.1.3 The'AUTOCAL'Process ... 1 1.2 DC VOLTAGE CALIBRATION ... 2 1.3 OHMS CALIBRATION ... 4 1.4 AC VOLTAGE CALIBRATION - OPTION 10 ONLY ... 6 - OPTION 12 ONLY ... 7A 1.5 DC CURRENT CALIBRATION ... 8 1.6 AC CURRENT CALIBRATION ... 9 1.7 'AUTOCAL' USING 'KEYBOARD' ... 10 1.8 'AUTOCAL' OVER THE BUS ... 11 2 MECHANICAL DESCRIPTION ... 13 2.1 GENERAL ... 13 2.2 FRONT PANEL ... 13 2.3 REAR PANEL ... 13 2.4 EXTERNAL CONSTRUCTION ... 13 2.5 INTERNAL CONSTRUCTION ... 13 3 TECHNICAL DESCRIPTION ... 15 3.1 INTRODUCTION ... 15 3.2 ANALOG ASSEMBLY ... 15 3.2.1 Analog Interface ... 15 3.2.1.1 Introduction ... 15 3.2.1.2 Power-On ... 15 3.2.1.3 General Interface Update Sequence ... 17 3.2.1.4 Test ... 17 3.2.2 DC Isolator Section ... * ... 17 3.2.2.1 Preamplifier Scaling ... 17 3.2.2.2 Preamplifier ... 20 3.2.2.3 DC Bootstrap ... 20 3.2.2.4 Filtering ... 20 3.2.2.5 Input Current Compensation ... 21 3.2.2.6 Test ... 21 3.2.3 Analog to Digital Conversion (Analog Section) ... 21 3.2.3.1 General Principles ... 21 3.2.3.2 A-D Input Control ... 23 3.2.3.3 Reference Voltages and Control Logic Power Supply ... 23 3.2.3.4 High Speed Buffer ... 24 3.2.3.5 Integrator ... 24 3.2.3.6 1st Null Detector ... 25 3.2.3.7 2nd Null Detector ... 25 3.2.3.8 Reset Period ... 25 3.3 OPTION 10 AC ASSEMBLY ... 27 3.3.1 General Principles ... 27 3.3.2 Preamplifier and Scaling ... 27 3.3.3 RMS Converter ... 28 3.3.4 High Frequency Compensation ... 29 3.3.5 Frequency Detection ... 29 3.3.6 Test ... 29 A3.3 OPTION 12 AC ASSEMBLY ... A27 A3.3.1 General Principles ... A27 A3.3.2 Preamplifier and Scaling ... A27 A3.3.3 RMS Converter ... A28 A3.3.4 High Frequency Compensation ... A29 A3.3.5 Frequency Detection ... A29 A3.3.6 Test ... A29 3.4 OHMS ASSEMBLY ... 30 3.4.1 Low Drift Voltage Follower ... 30 3.4.2 Constant Current Source ... 30 3.4.3 Test ... 31 3.5 CURRENT ASSEMBLY ... 31 3.5.1 Current Measurements ... 32 3.5.2 Test ... 32 3.6 REAR INPUT/RATIO INPUT ... 32 3.6.1 General ... 32 3.6.2 Front Panel/Rear Panel Input ... 32 3.6.3 Ratio ... 32 3.6.4 Test ... 33 3.7 ANALOG OUTPUT ... 33 3.7.1 General ... 33 3.7.2 Description ... 33 3.8 DIGITAL ASSEMBLY ... 33 3.8.1 Processor and Memory ... 33 3.8.1.1 Software Overview ... 34 3.8.1.2 The Two-Phase Clock ... 35 3.8.1.3 RAM/ROM Circuit ... 36 3.8.2 CMOS Address Decode and Input/Output Circuits ... 36 3.8.3 Analog to Digital Conversion (Digital Section) ... 39 3.8.3.1 General Principle ... 39 3.8.3.2 Preset Procedure ... 39 3.8.3.3 A-D Measurement Sequence ... 41 3.8.3.4 Master Clock and Line Locking ... 41 3.9 FRONT PCB ASSEMBLY ... 42 3.9.1 Analog Input Signals ... 42 3.9.2 Display Signals ... 42 3.9.3 Keyboard Data Encode ... 42 3.9.4 Keyboard LED Data Decode ... 43 3.10 DISPLAY DRIVER ASSEMBLY ... 45 3.10.1 Write Mode ... 45 3.10.2 Read Mode ... 45 3.11 IEEE DIGITAL INTERFACE ... 46 3.11.1 ROM Circuit ... 46 3.11.2 Interface Circuit ... 46 3.12 BCD DIGITAL INTERFACE ... 47 3.12.1 RAM/ROM Circuit ... 47 3.12.2 Interface Circuit ... 47 3.13 REAR (POWER SUPPLY) PCB ASSEMBLY ... 48 3.13.1 General ... 48 3.13.2 180V Supply ... 48 3.13.3 5V Supply ... 48 3.13.4 ±15V Supply ... 48 3.14 SELF TEST SEQUENCE ... 48 4 INTERNAL ADJUSTMENT PROCEDURES ... 51 4.1 ALTERATION OF LINE VOLTAGE AND FREQUENCY ... 51 4.1.1 Changing Line Voltage ... 51 4.1.2 Changing Line Frequency ... 51 4.2 BATTERY REPLACEMENT ... 51 4.3 POST-REPAIR PROCEDURES ... 51 4.3.1 Basic DC Instrument ... 52 4.3.2 Ohms Assembly ... 53 4.3.3 AC Assembly (Option 10) ... 54 4.3.4 AC Assembly (Option 12) ... 55 APPENDIX 1 ANALOG DATA LINE 'F.E.T.' PATTERNS ... 57

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Servicehandboek
Handleidingen type:
Servicehandboek
Pagina’s:
54
Grootte:
2.24 Mbytes (2345970 Bytes)
Taal:
english
Herziening:
Issue 9
Handleidingen-ID:
850045
Datum:
1985 03 01
Kwaliteit:
Gescande document, lezen deels slecht, deels niet leesbaar.
Upload datum:
2016 12 29
MD5:
aad378d515bd35ed8ddbc3a9a0866b9e
Downloads:
1483

Informatie

CALIBRATION AND SERVICING HANDBOOK

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