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34401A
Service Manual
Agilent Technologies 34401A Service Manual Page 17
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Agilent 34401A
1
6 ½ Digit Multimeter
1
Safety Information
3
Additional Notices
5
DECLARATION OF CONFORMITY
6
Multimeter
7
The Front Panel at a Glance
8
Display Annunciators
10
The Rear Panel at a Glance
11
In This Book
12
Contents
13
Specifications
17
DC Characteristics
18
Measuring Characteristics
19
Chapter 1 Specifications
19
AC Characteristics
20
General Information
24
HOLD Sensitivity:
24
Product Dimensions
25
≤ 150 µV
26
≤ 15 µV
26
≤ 1.5 µV
26
Measurement Error
27
Sensitivity
28
Resolution
29
Accuracy
29
Transfer Accuracy
30
24-Hour Accuracy
30
90-Day and 1-Year Accuracy
30
Temperature Coefficients
30
Quick Start
33
ERROR annunciator turns on
35
To Adjust the Carrying Handle
38
To Measure Voltage
39
To Measure Resistance
39
To Measure Current
40
To Test Continuity
41
To Check Diodes
41
To Select a Range
42
To Set the Resolution
43
To Make dB Measurements
46
To Make dBm Measurements
47
To Trigger the Multimeter
48
Using an External Trigger
48
-H.DDD,DDD EFFF
50
-045.23 mVDC
50
Agilent System II
51
Menu Tutorial
53
Front-Panel Menu Reference
55
A Front-Panel Menu Tutorial
57
Chapter 3 Menu Tutorial
58
On/Off
59
MEAS MENU is your first
61
A: , B: , etc.)
61
Shift <
61
Auto/Man
63
Calibration
65
Procedures
65
Calibration Procedures
66
Agilent Calibration Services
67
Calibration Interval
67
Recommended Test Equipment
69
Application
69
Recommended Equipment
69
Accuracy Requirements
69
Test Considerations
70
Self-Test
71
ERROR annunciator
71
Quick Performance Check
72
Q in the
72
Zero Offset Verification
73
Input HI-LO and Sense HI-LO
73
Gain Verification
75
AC FILTER slow (MEAS MENU)
76
Calibration Security Code
79
Be careful
80
Calibration Count
81
Calibration Message
81
Zero Adjustment
83
Zero Adjustment Procedure
83
Gain Adjustment
85
Gain Adjustment Procedure
86
– 100 kHz
86
–10 Vdc Adjustment Procedure
88
500 Vdc Adjustment Procedure
89
RAM U505
90
MEAS MENU)
90
± 400 µA ac
90
Input Frequency
91
AC Filter Selected
91
Settling Time
91
Understanding Resolution
92
-045.23 mVDC
93
Error Messages
95
out of range
96
Calibration Error Messages
96
Theory of
97
Operation
97
Theory of Operation
98
Block Diagram
99
Front/Rear Selection
100
Function Switching
101
DC Amplifier
102
Input I and
103
Ohms Current Source
104
AC Circuit
105
A-to-D Converter
107
Floating Logic
109
Earth-Referenced Logic
111
Power Supplies
112
Front Panel
113
Service
115
Operating Checklist
117
Types of Service Available
118
Repackaging for Shipment
119
Surface Mount Repair
120
RS-232 connector
121
GPIB interface
121
Installation Procedure
122
Troubleshooting Hints
123
Unit is inoperative
123
Unit fails self-test
123
Current input is inoperative
124
Power supply problems
124
Readings indicate OVERLOAD
124
Power Supply Minimum Maximum
124
Readings are inaccurate
125
Readings show excessive noise
125
Self-Test Procedures
126
Power-On Self-Test
126
Self-Test Descriptions
126
Replaceable Parts
131
To Order Replaceable Parts
132
Backdating and Part Changes
132
Chapter 7 Replaceable Parts
133
Agilent 34401A Mainframe
140
Manufacturer’s List
141
Backdating
143
Chapter 8 Backdating
145
Agilent 34401A Multimeter
145
Schematics
148
Binder Edge (LH Page)
151
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