HP 432A, Manual

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Model 432A List of Tables
List of Illustrations
iii
Number Title Page
1–1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1–2. Thermistor Mounts for the 432A . . . . . . . . . 1–2
5–1. Recommended Test Equipment . . . . . . . . . . 5–0
5–2. Meter Accuracy Test . . . . . . . . . . . . . . . . . . . 5–2
5–3. Calibration Factor Test . . . . . . . . . . . . . . . . 5–2
5–4. Performance Test Card. . . . . . . . . . . . . . . . . 5–5
5–5. Out-of-Circuit Transistor Resistance
Measurements . . . . . . . . . . . . . . . . . 5–11
5–6. Etched Circuit Soldering Equipment. . . . . 5–13
5–7. Safe Ohmmeter Range for Transistor
Resistance Measurements . . . . . . . . 5–14
6–1. Replaceable Parts . . . . . . . . . . . . . . . . . . . . . 6–2
6–2. Code List of Manufacturers . . . . . . . . . . . . . 6–6
7–1. Schematic Notes . . . . . . . . . . . . . . . . . . . . . . 7–2
Number Title Page
7–2. Overall Troubleshooting. . . . . . . . . . . . . . . . 7–5
7–3. RF Bridge Troubleshooting . . . . . . . . . . . . . 7–6
7–4. Compensation Bridge Troubleshooting . . . . 7–6
7–5. Auto-Zero Troubleshooting. . . . . . . . . . . . . . 7–7
7–6. Chopping and Summing Circuit
Troubleshooting . . . . . . . . . . . . . . . . . 7–7
7–7. 5 kHz Multivibrator Troubleshooting . . . . . 7–7
7–8. Range Amplifier Troubleshooting . . . . . . . . 7–7
7–9. Calibrator Factor Amplifier
Troubleshooting . . . . . . . . . . . . . . . . . 7–7
7–10. Pulse Width Modulator and Meter
Troubleshooting . . . . . . . . . . . . . . . . . 7–7
7–11. Battery Charger Troubleshooting . . . . . . . . 7–9
7–12. Power Supply Troubleshooting . . . . . . . . . . 7–9
LIST OF TABLES
LIST OF ILLUSTRATIONS
Number Title Page
1–1. HP Model 432A Power Meter. . . . . . . . . . . . 1–0
1–2. Instrument Identification. . . . . . . . . . . . . . . 1–1
2–1. Sub-module Installation in Rack Adapter
Frame . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
2–2. HP Model 1051A Combining Case
Instrument Installation. . . . . . . . . . . 2–2
3–1. Precision Power Measurements. . . . . . . . . . 3–3
3–2. Front Panel Controls, Connectors and
Indicators . . . . . . . . . . . . . . . . . . . . . . 3–4
3–3. Rear Panel Controls and Connectors. . . . . . 3–6
3–4. Turn On and Zeroing Procedure . . . . . . . . . 3–8
4–1. Model 432A Simplified Block Diagram . . . . 4–0
4–2. Model 432A Block Diagram . . . . . . . . . . . . . 4–3
4–3. Model 432A RF Bridge Talking
Schematic . . . . . . . . . . . . . . . . . . . . . . 4–4
4–4. Model 432A Meter Logic Talking
Schematic . . . . . . . . . . . . . . . . . . . . . . 4–6
4–5. Model 432A Power Supply Talking
Schematic . . . . . . . . . . . . . . . . . . . . . . 4–8
5–1. Check and Adjustment Test Setup . . . . . . . 5–1
5–2. Zero Carryover Test Setup . . . . . . . . . . . . . . 5–3
5–3. Bridge Amplifier Test . . . . . . . . . . . . . . . . . 5–10
5–4. Transistor Biasing and Operating
Characteristics . . . . . . . . . . . . . . . . . 5–12
Number Title Page
7–1. Servicing Block Diagram . . . . . . . . . . . . . . . 7–3
7–2. Model 432A Top Internal View . . . . . . . . . . 7–4
7–3. Model 432A Waveforms . . . . . . . . . . . . . . . . 7–4
7–4. Model 432A Test Point Locations . . . . . . . . 7–5
7–5. Model 432A Bottom View, Component
Locations . . . . . . . . . . . . . . . . . . . . . . 7–6
7–6. Model 432A Front Panel Interior. . . . . . . . . 7–6
7–7. A1 Bridge Assembly, Component
Locations . . . . . . . . . . . . . . . . . . . . . 7–10
7–8. Model 432A Rear Panel Interior . . . . . . . . 7–10
7–9. RF and Compensation Bridge
Schematic Diagram . . . . . . . . . . . . . 7–11
7–10. Model 432A Switches . . . . . . . . . . . . . . . . . 7–12
7–11. A2 Meter Logic Assembly, Component
Locations . . . . . . . . . . . . . . . . . . . . . 7–13
7–12. Meter Logic Schematic Diagram . . . . . . . . 7–13
7–13. A2 Meter Logic Assembly, Power Supply
Component Locations . . . . . . . . . . . 7–15
7–14. A7 Battery Charging Circuit (Option 01)
Component Locations . . . . . . . . . . . 7–15
7–15. Power Supply, Schematic Diagram . . . . . . 7–15
7–16. Thermistor Cable Wiring Diagram . . . . . . 7–16