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Fluke 341A Calibrator
Manufacturer:
Model:
341A
Date:
1969
Class:
Type:
SubType:
DC Voltage Calibrators

Information

1-2. The Fluke Model 341Ä and Model 343A' DC Voltage Calibrators provide dc voltages of 0 to 1100 volts in three ranges. Voltages are selected by eleven-position decade switches, which provide in-line, digital readout of the instrument output voltage. The Model 341A employs six-dial readout» with 1 ppm resolution, and the Model 343A employs seven-dial readout, with 0.1 ppm resolution. 1-3. A controlled current limiter, a fixed current limiter, and an electronic crowbar circuit provide protection against instrument malfunction and operator error. Output current or voltage, depending on function desired, are continuously monitored by a front panel meter. 1-4. The instruments are designed for rack-mount installation, using the mounting brackets supplied, and are equipped with resilient feet and tilt-down bail for field or bench use.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
98
Size:
8.48 Mbytes (8891485 Bytes)
Language:
english
Revision:
Manual-ID:
293951
Date:
unknown
Quality:
Scanned document, all readable.
Upload date:
10 February 2016
MD5:
4dccc19ab7885f56439b8480d49f98d3
Downloads:
1502

Information

I INTRODUCTION AND SPECIFICATIONS ... 1-1 1-1. introduction ... 1-1 1-5. Electrical Specifications ... 1-1 1-6. Environmental Specifications ... 1-2 1-7. Mechanical Specifications ... 1-3 1-8. General Specifications ... 1-3 II OPERATING INSTRUCTIONS ... 2-1 2-1. Introduction ... 2-1 2-4. Operating Features. . ... 2-1 2-6. Controls, Terminals and Indicators ... 2-1 2-8. Input Power Requirements ... 2-1 2-10. Preliminary Operation ... 2-1 2-12, AC Line Connections ... 2-1 2-14. Sense Connections ... 2-1 2-18. Current Limit Operation ... 2-5 2-20. Overload Protection ... 2-5 2-23. Mechanical Zero Adjustment ... 2-5 2-25.. Operation as a Voltage Calibrator ... 2-5 2-27. Applications ... 2-6 2-29. Operation as a Differential Voltmeter ... 2-6 2-31. Operation as a 10 ppm Source ... 2-6 III THEORY OF OPERATION ... 3-1 3-1. Introduction ... 3-1 3-3. Block Diagram Analysis ... 3-1 3-12. Circuit Analysis ... 3-3 3-13. +15 Volt Reference and Auxiliary Supplies ... 3-3 3-16. Chopper-Stabilized Amplifier ... 3-3 3-20. Series Regulator ... 3-3 3-23. Controlled Current Limiter ... 3-4 3-27. Negative Voltage Limiter ... 3-4 3-29. Sink Supply and Crowbar ... 3-4 3-34. Control Circuit ... 3-5 3-38. High Voltage Power Supply ... 3-6 3-40. Meter Circuit ... 3-6 3-42. Beta String ... 3-6 IV MAINTENANCE ... 4-1 4-i. Introduction ... ... 4-i 4-3. Service information ... 4-1 4-6. Test Equipment. ... 4-1 4-8. General Maintenance ... 4-1 4-9, Maintenance Access ... . 4-1 4-13. Adjustment Locations ... 4-3 4-15. Cleaning ... 4-4 4“!S. 1 15/230 Volt Conversion ... 4-5 4-20. Fuse Replacement ... ... 4-5 4-22. Lamp Replacement. ... . 4-5 4-24. Performance Tests ... - 4-6 4-26. Line Regulation. ... 4-6 4-28. Load Regulation ... 4-6 4-30, Ripple ... 4-7 4-32. Output Voltage Accuracy ... 4-8 4-36. Troubleshooting ... 4-8 4-39. Test Point Resistance Check ... 4-8 4-41. Standby Test ... 4-8 4-43. Auxiliary Supply Voltages ... 4-9 4-45. Power-On Test ... 440 4-47. Chopper Amplifier ... 4-11 4-49. Series Regulator ... 4-11 4-51. Controlled Current Limiter ... 4-12 4-53. Crowbar ... 4-12 4-55. High Voltage Power supply. ... 4-12 4-57. Beta String ... . 4-13 4-59. Pane! Meter ... 4-13 4-61. Model 341A Calibration ... 4-14 4-63. Preliminary Operations ... 4-14 4-64. Reference Voltage Adjustment. ... 4-14 4-65. Zero Output Adjustments ... 4-14 4-66. Beta String Linearity Adjustments ... 4-14 4-67. Range Adjustments . ... 4-14 4-68. Calibration Verification ... 4-15 4-70. Model 343A Preliminary Calibration ... 4-15 4-72. Preliminary Operations ... '4-15 4-73. Reference Voltage Adjustment ... : 4-16 4-74. Zero Output Adjustments ... 4-16 4-75. Beta String Linearity Adjustments ... 4-16 4-76, Temperature Stabilization ... 4-17 4-77. Model 343A Final Calibration ... 4-17 4-79. Zero Output Adjustments ... 4-17 4-80. Beta String Linearity Adjustments ... 4-17 4-83. Range Adjustments ... 4-19 4-84, Calibration Verifications ... 4-20 V LIST OF REPLACEABLE PARTS ... 5-1 5-1. Introduction ... . 5-1 5-3. Column Description ... 5-1. 5-5. How To Obtain Parts ... 5-2 5-8. List of Abbreviations ... 5-2 5-9. Serial Number Effectivity ... 5-45 7 GENERAL INFORMATION ... · ?-l 8 SCHEMATIC DIAGRAMS ... 8-1

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