Agilent Technologies 34401A Service Manual download pdf (Page 41)

To Test Continuity

Test current source: 1 mA

Maximum resolution: 0.1 Ω (range is fixed at 1 kohm)

Beeper threshold: 1 Ω to 1000 Ω (beeps below adjustable threshold)

To Check Diodes

Test current source: 1 mA

Maximum resolution: 100 µV (range is fixed at 1 Vdc)

Beeper threshold: 0.3 volts ≤ V

measured

≤ 0.8 volts (not adjustable)

Chapter 2 Quick Start

To Test Continuity

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 162 163

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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Agilent Technologies 34401A Service Manual Page 41

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