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419A
HP 419A Manuals
Manuals and User Guides for HP 419A. We have
2
HP 419A manuals available for free PDF download: Operating And Service Manual
HP 419A Operating And Service Manual (51 pages)
DC NULL VOLTMETER
Brand:
HP
| Category:
Measuring Instruments
| Size: 3 MB
Table of Contents
Table of Contents
4
General Information
7
Specifications
7
Description and Purpose
7
Instrument/Manual Identification
7
Accessory Equipment Supplied
7
Accessory Equipment Available
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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HP 419A Operating And Service Manual (41 pages)
DC NULL VOLTMETER
Brand:
HP
| Category:
Measuring Instruments
| Size: 3 MB
Table of Contents
Warranty
2
Specifications
3
Instrument/Manual Identification
3
Accessory Equipment Supplied
3
Accessory Equipment Available
3
Section TI INSTALLATION
4
Introduction
4
Initial Inspection
4
Power Requirements
4
Grounding Requirements
4
Bench Mounting
4
Rack Mounting
4
Combination Mounting
4
Repackaging for Shipment
4
Section WI OPERATING INSTRUCTIONS
6
Introduction
6
Operating Instructions
6
Turn-On Procedure
6
Operation
6
DC Voltage Measurements . Oe
6
DC Current Measurements
7
Applications
7
Theory of Operation
11
Introduction
11
General Description
11
Detailed Description
11
BUCKING SUPPLY (See Figure 6-3)
11
Model 419A Attenuation and Gain Characteristics
11
Input Attenuator
12
Input Filter
12
Modulator/Demodulator
12
AC Amplifier
12
DC Amplifier
12
Meter Circuit
12
Feedback Control
12
Power Supply and Neon Driver (Figure 6-4)
13
Test Equipment Required
14
Maintenance
15
Test Equipment
15
Performance Tests
15
Voltmeter Accuracy Test
15
Bucking Voltage Test
15
Introduction
15
Response Time Test
16
Superimposed AC Rejection Test
16
Noise Test
16
Input Resistance Test
17
Repair Procedures
17
Cover Removal
17
Servicing Printed Circuit Boards
17
Adjustment and Calibration
18
Mechanical Zero Adjustment
18
Chopper Adjustment
18
Electrical Zero Adjustment
19
Full Scale Calibration
19
Battery Test Calibration
19
Troubleshooting
19
No Response to Input
19
Positive or Negative Foldover
20
Excessive Noise
20
Circuit Diagrams
21
Schematic Diagrams
21
Component Location Diagrams
21
Replaceable Parts
23
Ordering Information
23
Non-Listed Parts
23
United States and Canada
27
Section 4-1
28
Manual Backdating Changes
29
Manual Backdating
30
Model 419A Specifications
32
Table of Contents
33
Ee Ee
40
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