Hewlett Packard 411A Analog multimeter
Manufacturer:
Model:
411A
Date:
1962
Category:
Group:
Description:
RF Millivoltmeter

Information

GENERAL DESCRIPTION. 1-2. The Hewlett-Packard Model 411A RF Millivoltmeter is a sensitive ac voltmeter which will measure accurately from 0.01 volt rms to 10 volts rms full scale in the frequency range of 500 kc to 1000 me (1 gc). The 411A Probe when used without Accessories will respond to frequencies up to 4 gc and may be used as an indicator up to this frequency. The Model 411A is supplied with a BNC-type screw-on Probe tip providing easy and rapid measurement at low frequencies. Other Probe tips, which make possible convenient measurement at 1000 me, are available. The Model 411A has a recorder output with an adjustable level.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
38
Size:
9.90 Mbytes (10383666 Bytes)
Language:
english
Revision:
Manual ID:
01193-1
Date:
1962 02 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 30
MD5:
d8e63a0bae1bbf507e6a8d845a02a5a5
Downloads:
444

Information

I GENERAL INFORMATION ... 1-1 1-1. General Description ... 1-1 1-3. Probe Tips Available ... • 1-1 1-6. Instrument Identification ... 1-1 1-8. Power Cable ... 1-1 II PREPARATION FOR USE ... 2-1 2-1. Unpacking & Mechanical Inspection • 2-1 2-4. Operation Check ... 2-1 2-6. Installation ... 2-1 2-8. Power Requirements ... 2-1 2-10. Operation on 115 or 230 Volts • • • 2-1 2-13. Rack-Mount Model ... 2-1 2-15. Preparation for Storage and Shipment 2-1 2-18. Storage ... 2-1 III OPERATION ... 3-1 3-1. Preliminary Considerations ... 3-1 3-5. Probe Tips ... 3-1 3-17. Selection of Probe Tip ... 3-2 3-19. Installation of Probe Tips ... 3-2 3-22. Mechanical Meter-Zero ... 3-2 3-24. Zero Adjustment ... 3-2 3-27. Interpreting Reading ... 3-2 IV PRINCIPLES OF OPERATION ... 4-1 4-1. Introduction ... 4-1 4-7. Probe ... 4-2 4-10. Modulator ... 4-2 4-12. Chopper Amplifier ... 4-2 4-14. Demodulator ... 4-2 Section Page IV PRINCIPLES OF OPERATION (Cont’d) 4-16. Cathode Follower ... 4-2 4-20. Modulator and 100 kc Oscillator • • 4-2 4-22. Power Amplifier ... 4-2 4-25. Feedback ... 4-2 V MAINTENANCE ... 5-1 5-1. Introduction ... 5-1 5-6. Test Equipment ... 5-1 5-8. Removing the Cabinet ... 5-2 5-10. Cartridge and/or Cable Replacement 5-2 5-13. Tube Replacement ... 5-2 5-16. Troubleshooting ... 5-2 5-19. Measure Power supply Voltages . 5-2 5-21. Measure Ripple ... 5-3 5-24. Downscale Meter Circuit ... 5-3 5-26. Modulator/Amplifier Tuning. . . 5-3 5-30. Modulator/Amplifier Gain . . . 5-5 5-31. Upscale Meter Circuit ... 5-5 5-33. Output Circuit ... 5-5 5-34. Bias Adjustment ... 5-5 5-35. Hum Balance ... 5-5 5-36. Zero Control ... 5-5 5-37. Chopper Amplifier Gain ... 5-5 5-40. Maintenance Procedures ... 5-5 5-41. Transistor or Tube Replacement . 5-5 5-43. Calibration ... 5-5 5-45. Final Test . . .* ... 5-7 VI REPLACEABLE PARTS ... 6-1 6-1. Introduction ... 6-1 6-4. Ordering Information ... 6-1

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