HP 419A Manuals

Manuals and User Guides for HP 419A. We have 1 HP 419A manual available for free PDF download: Operating And Service Manual

HP 419A Operating And Service Manual

HP 419A Operating And Service Manual (51 pages)

DC NULL VOLTMETER

Brand: HP | Category: Measuring Instruments | Size: 3.17 MB

Table of Contents

Table of Contents
4
General Information
7
Installation
8
- Bench Mounting
  8
- Rack Mounting
  8
  - Combination Mounting
    8
- Repackaging for Shipment
  8
Front and Rear Panel Controls, Indi
9
- Operating Instructions
  10
- Introduction
  10
- Turn-On Procedure (Battery Operation)
  10
  - Turn-On Procedure (AC Line Operation)
    10
  - DC Current Measurements
    11
- Applications
  11
Leakage Measurement
12
Calibrating a DC Standard
12
Measuring Power Supply Drift
13
Theory of Operation
15
Bucking Supply (See Figure 6-3)
15
Model 419A Attenuation and Gain Characteristics
15
- Input Attenuator
  16
- Inputfilter
  16
- Modulator/Demodulator
  16
- AC Amplifier
  16
- DC Amplifier
  16
- Meter Circuit
  16
- Feedback Control
  16
- (Figure 6-4)
  17
- Test Equipment
  18
Voltmeter Accuracy Performance Test Setup
18
Section 3-2
19
- Voltmeter Accuracy Test
  19
- Bucking Voltage Test
  19
Accuracy Performance Test, Sup
19
- Ammeter Accuracy Test
  20
- Response Time Test
  20
- Superimposed AC Rejection Test
  20
- Noise Test
  20
Ammeter Accuracy Test Setup
20
- Input Resistance Test
  21
- Cover Removal
  21
- Servicing Printed Circuit Boards
  21
- Adjustment and Calibration
  22
- Mechanical Zero Adjustment
  22
- Chopper Adjustment
  22
- Electrical Zero Adjustment
  23
- Full Scale Calibration
  23
- Battery Test Calibration
  23
- Troubleshooting
  23
- No Response to Input
  23
- Positive or Negati~ Foldover
  24
- Excessive Noise
  24
- Troubleshooting the Input Attenuator
  24
- Replacement of Factory Selected Components
  24
- Circuit Diagrams
  25
- Schematic Diagrams
  25
- Component Location Diagrams
  25
- Amplifier and Amplifier Switching
  31
- Schematic and Component Location
  31
Power Supply and Neon Driver
34
- Schematic and Component Location
  34
Replaceab le Parts
35
- Ordering Information
  35
- Non-Listed Parts
  35
Replaceable Parts
36
Appendix 4-2 a
37
- Code List of Manufacturers
  41
Sales and Service Offices
43
Manual Backdating Changes
46
Model 419A, Component Location Diagram
47

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