HP 412A Manuals

Manuals and User Guides for HP 412A. We have 2 HP 412A manuals available for free PDF download: Operating And Service Manual, Manual

HP 412A Operating And Service Manual

HP 412A Operating And Service Manual (40 pages)

DC VACUUM TUBE VOLTMETER, SERIALS PREFIXED: 301-, 3160, 424-, 649-

Brand: HP | Category: Measuring Instruments | Size: 11.94 MB

Table of Contents

Table of Contents
3
General Information
6
Introduction
6
Instrument and Manual Identification
6
Introduction
7
Initial Inspection
7
Power Requirements
7
Repackaging for Shipment
7
Introduction
8
Low-Level Electrical Phenomena
8
Voltage Measurement
8
Current Measurement
8
Resistance Measurement
9
Amplifier Operation
10
General
11
Range and Function Selection
11
Filters
11
Modulator. Amplifier. Demodulator
11
Power
12
Maintenance
13
- Required Test Equipment
  13
- Performance Checks
  13
  - Voltmeter Accuracy Check
    13
- Ohmmeter Accuracy Check
  14
Input Resistance Check
14
- Adjustment and Calibration Proccdure
  15
  - Cabinet Removal
    15
  - Mechanical Adjustment of Meter Zero
    15
Location of Adjustments
16
- Hum Balance Adjustment
  17
- Cathode Follower Bias Adjustrncnt
  17
- Meter Electrical Zero Adjustment
  17
  - Amplifier Gain Adjustment and Meter Calibration
    17
- Troubleshooting
  18
- Front Panel Indications
  18
- Power Supply and Amplifier Checks
  18
  - Modulator Clieck
    18
- Modulator Replacement
  19
- Demodulator Check
  19
- Demodulator Replacement
  20
- Switch Checks
  20
  - Components
    20
Demodulator Assembly
20
Cabinet Model
20
Rack Model
20
Simplified Schematic, Voltmeter
21
Simplified Schematic, Ammeter
22
- Meter Zero
  24
AC Rejection Check
25
Replaceableparts
26
- Non-Listed Parts
  26
Mechanical Parts
30
Location
31
Location of
34

HP 412A Manual (4 pages)

Vacuum Tube Voltmeter

Brand: HP | Category: Measuring Instruments | Size: 0.12 MB

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