HP 400F, Operating And Service Manual, Page: 7 / 54

Model 400F/FL Table of Contents
List of Tables
List of Illustrations
T .... LE OF CONTENTS
Section Page
I GENERAL INFORMATION . . . . . . .. 1-1
1-1. Description
. . . . . . .. 1-1
1-4. Option (400F only) .......... 1-1
1-6. Instrument and Manual Identification . 1-1
Section
Page
D INSTALLATION 2-1
2-1. Introduction
2-1
2-3. Initial Inspection 2-1
2-5. Power Requirements 2-1
2-7. Grounding Requirements 2-1
2-10. Installation . . . . . . . 2-1
2-12. Bench Mounting . . .
2-1
2-14. Rack Mounting 2-1
2-16. Combination Mounting
2-1
2-18. Repackaging for Shipment
2-1
SectiOn Page
m
OPERATING INSTRUCTIONS 3-1
3-1. Introduction . . . ... 3-1
3-3. Controls. Indicators and Connectors 3-1
3-5. Meter Mechanical Zero Adjustment
(400F Only) ... .... 3-1
3-7. Turn-On Procedures
3-1
3-8. AC Voltage Measurements
3-1
3-g.
DC Measurements . . .
3-2
3-10. Wide Band AC Amplifier
3-2
3-11. 400F with Option 01
3-2
Section
IV
THEORY OF OPERA TION
4-1. General ..... .
4-3. Block Diagram Description
4-5. Schematic Theory
4-7.
Input Attenuator
4-9.
Preamplifier .
4-13. Post Attenuator
4-15. 100
KHz Low
Pass Filter
4-17.
Meter Amplifier
4-22. Meter Bridge
4-27. Power Supply ..... .
Page
'-1
'-1
'-1
'-1
'-1
'-1
'-1
'-1
'-2
'-2
.-3
Section
Page
V
MAINTENANCE . .... ...
5-1
5-1. Introduction ... . ... 5-1
5-3. Test Equipment Required
5-1
5-5. Performance Checks
5-1
5-10. Top Cover Removal 5-1
5-12. Accuracy and Frequency Response
Checks
.... ... . . .. .. 5-1
5-14. Range Tracking Check .. .. . . 5-2
5-16. Input Impedance Check . . . . .. 5-3
5-19. Alignment and Calibration Procedures 5-3
5-21. Cover Removal and Replacement . 5-4
5-26. Meter Mechanical ZeroAdiustment 5-4
5-28. Meter Calibration
5-4
5-32. Attenuator Alignment . . 5-5
5-34. A2Ql Bias Adjustment . 5-5
5-36. Replacement of A2C37* 5-5
5-39. Troubleshooting Procedure
5- 5
5-44. Power Supply . . . . . .
5-6
5-46.
AmplUiers . ......
5-6
5-48. Meter Bridge . . . . . .
5-6
5-50. Etched Circuit Board Repair
5-6
Section
VI SCHEMA TIC
6-1. Introduction
Section
vn
REPLACEABLE PARTS
7-1. Introduction
7-4. Ordering Information
7-6. Non-Listed Parts
Appendix
A CODE LIST OF MANUFACTURERS
Appendix
B SALES AND SERVICE OFFICES
Page
6-1
. 6-1
Page
7-1
7-1
7-1
7-1
LIST Of TA_US
Number
1-1. Specifications
3-1. EHect of Distortion on Average Respond-
ing Meter ....... .
3-2. AC Amplifier Gain Factors
5-1. Test Equipment . . . . . .
5-2. Full Scale Calibration Tolerances (400F).
Page
1-0
3-1
3-2
5-0
5-2
Number Page
5-3. Full Scale Calibration Tolerances (400FL) . 5-2
5-4. Troubleshooting Guide .. 5-6
5-5. Power Supply Voltages . .
5-6
5-6. Preamplifier Voltages .. 5-6
5-7. Meter Amplifier Voltages 5-6
5-8. Meter Bridge Voltages
5-6
7-1. Replaceable Parts
7-2
LIST OF ILLUSTR"'TlONS
Number
1-1. Model 400F/FL AC Voltmeter
3-1. Location of Controls and Indicators
3-2. External Battery Connection .. .
3-3. Impedance Correction Graph ... .
4-1. Functional Circuit Diagram
4-2. Filter Attenuation Characteristics .
4-3. Simplified Diagram of Metering Circuit
5-1. Accuracy and Frequency Response Check
Setup .. ..... ... ....
, .
. .
01795-1
page
1-0
3-0
3-1
3-3
4-0
4-1
4-2
5-0
Number Page
5-2. Alternate Accuracy and Frequency Re-
sponse Check Setup . . . . . . . . .
5-3
5-3. Input Impedance Check Setup . . . . .
5-4
5-4. Location
01
Internal Adjustments
5-4
6-1. Model 400F/FL Range Switch and plo
Internal Wiring Data . ....... 6-2
6-2. Model 400F/FL Component Location . 6-3/6-4
6-3. Model 400F/FL Schematic Diagram . 6-3/6-4
7-1. Location of Important Mechanical Parts . 7-0
ill