Informations sur l'appareil:

Fluke 752A Autre
Fabricant:
Fluke
Modèle: 752A
Date: 1984
Catégorie: Mètres
Groupe: Autre
Description: Reference Divider
Information:
                                    The John Fluke Model 752A is a self-calibrating, precision
dc voltage divider with two ranges of division: 10:1 and
100:1. In addition to the two divider ranges, the 752A
incorporates switching modes used in the cardinal point
calibration of dc voltage calibrators. The points provided
on the 752A are 0.1V, IV, 10V, 100V, and 1000V. When the
752A is combined with a dc voltage calibrator, a 10V
reference standard, and a null detector, the 752A switches
the equipment to standardize the dc voltage calibrator
without having to physically change the leads.
1-3. The 752A is self-calibrated before each use. This
procedure requires a stable source and a null detector. The
752A is a ratio device only, and does not have to be
included in a calibration cycle that is traceable to an
external standard.
1 -4. The front panel MODE switch selects between self-
calibration and normal operation. In the Self-Calibration
mode, the voltage divider resistors are compared using an
external null detector to an internal, self-calibrating
bridge to precisely set their overall value, and hence, the
division ration of the 752A. The three push-to-tum CALIBRATE
controls adjust the 10:1 divider, 100:1 divider, and the
self-calibration bridge. The CALIBRATE switch selects the
divider to be calibrated and interchanges the two resistors
in the self-calibration bridge to check that they are of
equal value. If not, the BALANCE control adjusts one of
these resistors by a small amount to make both
selfcalibration bridge resistors equal in value.
1-5. In normal operation, the MODE switch settings
correspond to the cardinal calibration points of a dc
voltage calibration system. The MODE switch now
interconnects the external equipment in one of three ways
(refer to Figure 2-3):
1. The voltage divider of the 752A is connected between the
reference standard and the null detector as shown in Figures
2-3a and 2-3b.
2. The voltage divider is out of the circuit and the
reference standard is compared directly with the UUT (unit
under test) as shown in Figure 2-3c.
3. The voltage divider is connected between the UUT and the
null detector as shown in Figures 2-3d and 2-3 e.

Ces manuels sont disponibles pour les équipements ci-dessus :

Type de document: Service et Manuel de l'utilisateur Fluke-8773-Manual-Page-1-Picture
Nombre de pages: 65
Taille du fichier: 5.14 Mbytes (5385347 Bytes)
langue: Anglais
Révision:
Document ID/Numéro: 645069
Date: 01 avril 1984
qualité: Document scanné, tous les lisible.
Chargé sur:
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Information:
1 INTRODUCTION AND SPECIFICATIONS 1-1
1-1. INTRODUCTION
........................................................................................
1-1
1-7. SPECIFICATIONS AND
ACCESSORIES................................................ 1-1
2 OPERATION
...........................................................................................................2-1
2-1. INTRODUCTION
........................................................................................2-1
2-3. SHIPPING INFORMATION
.....................................................................2-1
2-5. INSTALLATION
........................................................................................2-1
2-7. INPUT LINE
POWER................................................................................2-1
2-9. FRONT AND REAR PANEL FEATURES
............................................2-1
2-11. OPERATING NOTES
................................................................................2-1
2-12. Introduction
.............................................................................................2-1
2-14. Guard/Ground
Terminals.........................................................................2-1
2-17. Self-Calibration Procedure
.......................................................................2-1
2-19. OPERATION
...............................................................................................2-4
2-20. Introduction
..............................................................................................2-4
2-22. Calibration System Operation
.................................................................2-4
2-24. Stand Alone Operation
............................................................................2-4
3 THEORY OF OPERATION ...............
.................................................................3-1
3-1 INTRODUCTION
........................................................................................3-1
3-3. OVERALL FUNCTIONAL DESCRIPTION
..........................................3-1
3-6. System Operation
......................................................................................3-1
3-8. Stand-Alone Operation
.............................................................................3-2
3-10. VOLTAGE DIVIDER CIRCUIT
...............................................................3-2
3-14. MODE
SWITCH..........................................................................................3-2
3-16. SELF-CALIBRATION CIRCUIT
.............................................................3-2
3-23. GUARD CIRCUITS
....................................................................................3-4
3-26. ERROR ANALYSIS
..................................................................................3Λ
4 MAINTENANCE
.......................................................................................................4-1
4-1.
INTRODUCTION........................................................................................4-1
4-5. SERVICE INFORMATION
.......................................................................4-1
4-9. GENERAL MAINTENANCE
...................................................................4-2
4-10. Introduction
..............................................................................................4-2
4-12.
Cleaning.....................................................................................................4-2
4-16. Internal Repair
..........................................................................................4-2
4-18. Access Procedure
......................................................................................4-2
4-30. PERFORMANCE CHECKS
.....................................................................4-7
4-32. INTERNAL CALIBRATION (Long-Term Drift
Corr.)..........................4-7
4-34. Self-Calibration Bridge Long-Term Drift Correction
Procedure ..........4-7
4-36. Self-Calibration Bridge Long-Term Drift Correction
Example ............4-7
4-39. 10:1 Divider Long-Term Drift Correction Procedure
...........................4-8
4-41. 10:1 Divider Drift Correction Example
..................................................4-9
4-44. 100:1 Divider Long-Term Drift Correction Procedure
.........................4-10
4-46. TROUBLESHOOTING
...............................................................................4-11
5 LIST OF REPLACEABLE PARTS
.........................................................................5-1
5-1.
INTRODUCTION........................................................................................5-1
5-4. HOW TO OBTAIN PARTS
.....................................................................5-2
6
ACCESSORIES.........................................................................................................6-1
INTRODUCTION........................................................................................6-1
6-3. DUAL MOUNTING FASTENERS (M00-800-5237)
............................... 6-1
6-5. HALF-WIDTH RACK MOUNT KIT (M07-203-601)
............................. 6-1
6-7. FULL-WIDTH RACK MOUNT KIT ( M07-200-603)
............................. 6-1
7 GENERAL INFORMATION
....................................................................................7-1
7A MANUAL BACKDATING INFORMATION
..........................................................7A-1
8 SCHEMATIC DIAGRAMS
......................................................................................8-1
INDEX
.........................................................................................................................8-12


NO SCHEMATICS!
Fluke-8773-Manual-Page-1-Picture


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