Attrezzatura informazioni:

Fluke 8921A Multimetro digitale
Produttore:
Fluke
Modello: 8921A
Data: 1978
Categoria: Strumenti di misura
Gruppo: Multimetro digitale
Descrizione: True RMS Voltmeter
Informazioni:
                                    The Models 8920A and 8921A are digital true rms voltmeters,
capable of accurately measuring the true rms value of
nonsinusoidal signals containing AC or AC + DC components.
Both have a frequency range of 10 Hz to 20 MHz with a
full-scale crest factor of seven, and are capable of
displaying measurements in either volts or dB units.

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

Fluke -- 8921A -- Servizio e manuale utente
Nome file: Fluke-9275-Manual-Page-1-Picture
Tipo manuale: Servizio e manuale utente
Pagine: 129
Dimensioni: 9.42 Mbytes (9881820 Bytes)
Lingua: Inglese
Revisione:
Manual-ID/Number: P/N 487157
Data: 01 luglio 1988
Qualità: Documento scansionato, tutto leggibile.
Data di caricamento:
MD5: 10c1e16add724b1f56512860dbd9ad5c
Download: 173 dal 10 agosto 2017
Informazioni:
.............................. 1-1

1-1. INTRODUCTION
............................................. 1-1

1-9. SPECIFICATIONS
.............................................. 1-2

1-11.	Specifications, Options
........................................ 1-2

2	OPERATING INSTRUCTIONS
......................................... 2-1

2-1.	INTRODUCTION
............................................. 2-1

2-3. SHIPPING INFORMATION
................................... 2-1

2-6. INSTALLATION
.............................................. 2-1

2-8. INPUT POWER
............................................... 2-2

2-10. CONTROLS AND INDICATORS
............................... 2-2

2-12. OPERATING
NOTES.......................................... 2-4

2-14. Fuse Replacement
............................................ 2-4

2-16. Display Indications
........................................... 2-4

2-21. Measurement
Connections..................................... 2-4

2-37. Input Signal Considerations
................................... 2-6

2-43. Range Selection
.............................................. 2-6

2-50. Voltage Display Mode
........................................ 2-6

2-53. dB Display Mode
............................................ 2-6

2-56. dBm Measurements
.......................................... 2-7

2-68. Linear Analog Output
........................................ 2-8

2-70.	OPERATION
................................................. 2-8

3	THEORY OF OPERATION
............................................ 3-1

3-1.	INTRODUCTION
............................................. 3-1

3-3. OVERALL FUNCTIONAL DESCRIPTION ...................... 3-1

3-5.	Analog Circuitry
............................................. 3-1

3-10. Digital Circuitry
............................................. 3-2

3-13. DETAILED BLOCK DIAGRAM DESCRIPTION ................ 3-2

3-15. Signal Conditioner
........................................... 3-2

3-17. RMS
Converter.............................................. 3-2

3-20. A/D Converter
.............................................. 3-2

3-24. Controller
................................................... 3-5

3-42. Display and Annunciators
..................................... 3-10

3-45. Power Supply
............................................... 3-11
4	MAINTENANCE
...................................................... 4-1

4-1. INTRODUCTION
..........................................................................................4-1

4-4. GENERAL MAINTENANCE
......................................................................4-1

4-5.	Access Information
......................................................................................4-1

4-7. INPUT POWER SELECTION
....................................................................4-1

4-9.	Cleaning
........................................................................................................4-1

4-11. Fuse Replacement
........................................................................................4-3

4-13. PERFORMANCE CHECK
..........................................................................4-3

4-15. Low and Midband Performance Check (Volts Display Mode)
............4-3

4-17. dB Display Mode Check
............................................................................4-3

4-19. DC Low Level Check
..................................................................................4-5

4-21. AC Low Level Check
..................................................................................4-5

4-23. High Frequency Response Check
..............................................................4-5

4-25. CALIBRATION
..............................................................................................4-5

4-28. Power Supply Calibration
..........................................................................4-5

4-30. Low and Midband Accuracy Adjustments
..............................................4-10

4-32. Linear Analog Output (8920A only)
........................................................4-10

4-34. AC Low Level Calibration
........................................................................4-10

4-36. High Frequency Calibration
......................................................................4-13

4-38. RMS Protection Circuit Calibration
........................................................4-13

4-40.
TROUBLESHOOTING..................................................................................4-14

4-44. RMS Sensor
Replacement..........................................................................4-15

4-46. A/D Calibration Resistor Selection
..........................................................4-19

4-48.	DC Offset Resistor Selection
...................................4-19

5	LIST OF REPLACEABLE PARTS
...................................... 5-1

5-1.	INTRODUCTION
............................................. 5-2

5-4. HOW TO OBTAIN
PARTS..................................... 5-2

6	OPTION AND ACCESSORY INFORMATION
........................... 6-1

7	GENERAL INFORMATION
............................................ 7-1

7A-1	MANUAL CHANGE INFORMATION
................................... 7A-1

8	SCHEMATIC DIAGRAMS
............................................. 8-1
Fluke-9275-Manual-Page-1-Picture
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