Geräte Informationen:

Datron Instruments 1062 Digital Multimeter
Hersteller:
Datron Instruments
Modell: 1062
Datum: 1985
Kategorie: Messgeräte
Gruppe: Digital Multimeter
Beschreibung: 5½ digit AUTOCAL Multimeter
Informationen:
                                    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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Dokumenttyp: Serviceanleitung Datron-8190-Manual-Page-1-Picture
Seitenanzahl: 54
Dateigröße: 2.24 Mbytes (2345970 Bytes)
Sprache: Englisch
Revision: Issue 9
Dokument-ID/Nummer: 850045
Datum: 01 März 1985
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MD5: aad378d515bd35ed8ddbc3a9a0866b9e
Downloads: 177 seit dem 29 Dezember 2016
Informationen:
CALIBRATION AND SERVICING HANDBOOK

Datron-8190-Manual-Page-1-Picture


Dokumenttyp: Serviceanleitung Datron-9552-Manual-Page-1-Picture
Seitenanzahl: 202
Dateigröße: 79.53 Mbytes (83392725 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: 850045
Datum: 01 Januar 1984
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: 505962e8482e0150e9e08e923f47b917
Downloads: 127 seit dem 24 September 2017
Informationen:
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

Datron-9552-Manual-Page-1-Picture


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