Equipment information

Fluke 8921A Digital multimeter
Manufacturer
Fluke
Model 8921A
Date 1978
Category Measurement instruments
Group Digital multimeter
Description True RMS Voltmeter
Information
                                    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.

These manuals are available for the above equipment:

Manual Type Service and User Manual Fluke-9275-Manual-Page-1-Picture
Pages 129
Size 9.42 Mbytes (9881820 Bytes)
Language english
Revision
Manual-ID/Number P/N 487157
Date 01 July 1988
Quality Scanned document, all readable.
Upload date
MD5 10c1e16add724b1f56512860dbd9ad5c
Downloads 473 since 10 August 2017
Information
.............................. 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


Manual Type Service Manual Supplement Fluke-10117-Manual-Page-1-Picture
Pages 5
Size 45.04 Kbytes (46117 Bytes)
Language english
Revision 8
Manual-ID/Number
Date 01 June 1999
Quality Electronic document, no scan, very well readable.
Upload date
MD5 ff6b80a0b080e0bb159ae51074248787
Downloads 269 since 14 January 2018
Information
Manual Supplement
Fluke-10117-Manual-Page-1-Picture


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