Attrezzatura informazioni:

Keithley 177 Multimetro digitale
Produttore:
Keithley
Modello: 177
Data: 1978
Categoria: Strumenti di misura
Gruppo: Multimetro digitale
Descrizione: Microvolt DMM
Informazioni:
                                    INTRODUCTION

The Keithley Mode! 177 Microvolt DMM is a versatile, highly
sensitive digital multimeter which is used for measurement
of DC and AC voltages, DC and AC currents, as well as
resistance. For a complete summary of ranges for each of
these five functions, refer to the specifications at the
front of this manual. Ranges and functions are easily
selected with front panel pushbuttons, while connections for
ail functions are easily made with a single set of front
panel input terminals.

MODEL 177 FEATURES

1. 4 1/2 Digit LED Display—An easy to read 4 1/2 digit
display shows 20,000 counts of information with automatic
polarity indication.

2. 1µV/1mΩ Resolution—The Model 177 is capable of reading DC
voltages as low as 1µV and resistances down to 1mΩ.

3.	Front Panel Zero—The front panel zero control may be used
to compensate for thermal offsets or lead resistance when
making measurements.

4.	Analog Output—An analog output of 1V/10,000 counts is
available on the rear panel.

Questi manuali sono disponibili per l'attrezzatura di cui sopra:

Tipo manuale: Servizio e manuale utente Keithley-432-Manual-Page-1-Picture
Pagine: 54
Dimensioni: 2.68 Mbytes (2805020 Bytes)
Lingua: Inglese
Revisione:
Manual-ID/Number:
Data: 1978
Qualità: Documento scansionato, la lettura in parte male, non in parte leggibile.
Data di caricamento:
MD5: 7d861578956a524c2d516a297378939b
Download: 1829 dal 24 febbraio 2008
Informazioni:
Instruction Manual
Keithley-432-Manual-Page-1-Picture


Tipo manuale: Servizio e manuale utente Keithley-11205-Manual-Page-1-Picture
Pagine: 54
Dimensioni: 3.00 Mbytes (3144607 Bytes)
Lingua: Inglese
Revisione:
Manual-ID/Number: 29683
Data: 01 gennaio 1978
Qualità: Documento scansionato, tutto leggibile.
Data di caricamento:
MD5: e1193fa91e47378f40956bfa45200780
Download: 21 dal 21 agosto 2018
Informazioni:
SECTION 1 —GENERAL INFORMATION

1.1
Introduction....................................................................................................1-1

1.2	Model 177
Features..........................................................................................................................................................1-1

1.3	Warranty
Information..................................................................................................1-1

1.4	Manual Addenda
.......................................................................................................................................................1-1

1.5	Safety Symbols and
Terms..............................................................................................................................................1-1

1.6	Safety
Precautions.........................................................................................................1-1

1.7
Specifications......................................................................................................................................................1-1

1.8	Unpacking and Inspection
..............................................................................................................................................1-2

1.9	Scope of Model 177 Instruction
Manual........................................................................................................................1-2

1.10	Optional
Accessories.............................................................................................................................................1-2

1.10.1
PowerOptions..............................................................................................................................................................1-2

1.10.2	Cables and
Connectors...................................................................................................................1-2

1.10.3	Probes and
Shunts...............................................................................................................1-2

1.10.4	Carrying Case and Rack
Mount.....................................................................................................................1-2

1.10.5	Output
Options.......................................................................................................................................1-2

SECTION 2-OPERATION

2.1
Introduction......................................................................................................................................................................2-1

2.2	Safety Precautions for High Energy Circuits
........................................................................................2-1

2.3	Preparation for
Use.............................................................................................................2-1

2.4	Operation on Line
Power.................................................................................2-1

2.5	Operation on Battery Pack
Power.....................................................................................2-1

2.6	Battery
Charging..............................................................................................................................................................2-1

2.7	Operating
Instructions......................................................................................................................2-3

2.8	Zero
Adjustment..........................................................................................................................2-3

2.9	DC Voltage
Measurement............................................................................................................2-3

2.10	AC Voltage
Measurement........................................................................................................2-5

2.11	Resistance {S2)
Measurement..........................................................................................................................................2-6

2.12	DC Current
Measurement.......................................................................................................................2-7

2.13	AC Cu rre nt M easu
rement................................................................................................................................................2-7

2.14	TRMS Measurements {AC +
DC).......................................................................................................................2-8

2.15	Analog
Output..................................................................................................................................................................2-8

2.16	Tilt Bail
Adjustment....................................................................................................2-8

SECTION 3-PERFORMANCE VERIFICATION

3.1
Introduction................................................................................................................................................................3-1

3.2	Recommended Test
Equipment......................................................................................................................................3-1

3.3	Environmental
Conditions................................................................................................................................................3-1

3.4	Performance Verification
Procedure..............................................................................................................................3-1

3.4.1	Initial
Conditions..........................................................................................................................................................3-1

3.4.2	DC Voltage Accuracy Check (2V to 1200V Ranges)
................................................................................................3-1

3.4.3	DC Voltage Accuracy Check (20mV and 200mV
Ranges)............................................................3-2

3.4.4	AC Voltage Accuracy
Check..................................................................................3-2

3.4.5	Resistance (Q Accuracy
Check)................................................................................................................................3-2

3.4.6	DC Current Accuracy Check
......................................................................................................................................3-3

3.4.7
Analysis........................................................................................................................................................................3-3

SECTION 4-THEORY OF OPERATION

4.1
Introduction...........................................................................................................................................4-1

4.2	Overall
Operation..............................................................................................................................................................4-1

4.2.1	Signal
Conditioning......................................................................................................................................................4-1
4.2.2	A/ D
Converter..............................................................................................................................................................4-2

4.2.3	Range
Switching..........................................................................................................................................................4-2

4.3	AC
Converter........................................................................................................4-2

4.3.1
Scaling..........................................................................................................................................................................4-2

4.3.2	AC
Conversion..............................................................................................................................................................4-2

4.3.3	AC Current
Measurements...................................................................................................4-2

4.4	DC Signal
Conditioning....................................................................................................................................................4-2

4.4.1	Input Attenuation
........................................................................................................................................................4-3

4.4.2
Chopper............................................................................................................4-3

4.5	Ohms
Conversion................................................................................................................4-4

4.5.1	Floating Current
Source..............................................................................................................................................4-4

4.5.2
Chopper...........................................................................................................4-4

4.5.3	Adjustments and Input Overload
Protection.........................................................................................4-4

4.6	Analog
Output...................................................................................................4-4

4.7	Clock
..............................................................................................................................................................4-4

4.8	A/D
Converter............................................................................................................................4-4

4.8.1
Auto-Zero...............................................................................................................4-5

4.8.2
Signal-lnterface...................................................................................................................................................4-5

4.8.3	Reference-Integrate
......................................................................................................4-5

4.9
Display.............................................................................................................................................4-6

4.10	AC Power
Supply.......................................................................................................................................4-6

4.11	Model 1788 Battery Pack
............................................................................................................................................4-6

4.11.1	Battery Charging
Circuit..................................................................................................4-6

4.11.2	Battery Operation and Shutdown Circuit
..............................................................................................................4-6

SECTION 5-MAINTENANCE

5.1
introduction............................................................................................................................5-1

5.2	Recommended Test
Equipment..................................................................................................................5-1

5.3	Environmental
Conditions..................................................................................................................................5-1

5.4	Calibration
Procedure..........................................................................................................5-1

5.4.1	Calibration Shield
Installation......................................................................................................................................5-1

5.4.2
Warm-Up......................................................................................................................................................................5-1

5.4.3	Calibration Instructions
.........................................................................................................................5-1

5.5
Troubleshooting........................................................................................................5-2

5.6	Troubleshooting
Procedure............................................................................................................................................5-2

5.6.1	Calibration Shield/Battery Pack
Removal................................................................................5-2

5.6.2	Line
Power..............................................................................................................................................................5-4

5.6.3	Battery
Power............................................................................................................5-4

5.6.4	Display and A/D Converter
........................................................................................................................................5-4

5.6.5	AC
Converter.....................................................................................................5-4

5.6.6	Chopper Amplifier and Ohms
Source........................................................................................................................5-4

5.6.7	Current
Shunts............................................................................................................5-4

5.7	Front Panel ZERO Knob Removal and
Replacement..................................................................................................5-4

5.8	Fuse
Replacement...............................................................................................5-5

5.9	Model 1788 Battery Pack
Installation...................................................................................5-6

SECTION 6—REPLACEABLE PARTS

6.1
Introduction......................................................................................................................................................................6-1

6.2	Parts
List..........................................................................................................6-1

6.3	Ordering
Information............................................................................................................6-1

6.4	Factory
Service................................................................................................................................................................6-1

6.5	Component Location
Drawings......................................................................................................................................6-1

6.6	Schematic
Diagrams........................................................................................................................................................6-1

6.7	Maintenance Kit
...........................................................................................6-1
Keithley-11205-Manual-Page-1-Picture


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