Agilent Technologies 34450A Guia do Utilizador descarregar pdf (Página 101)

Measurement Tutorial 3

34450A User’s Guide 79

Figure 3-2 Noise caused by ground loops

The best way to eliminate ground loops is to isolate the

multimeter from earth by not grounding the input terminals.

If the multimeter must be earth- referenced, connect it and

the device-under-test to the same common ground point.

Also connect the multimeter and the device- under- test to

the same electrical outlet whenever possible.

Ideal

Meter

ground

test

>10GΩ

=LeadResistance

= Multimeter Isolation Resistance

ground

= Voltage Drop on Ground Bus

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 139 140

Keysight 34450A 5½ Digit 1
Multimeter 1
Safety Symbols 5
Regulatory Markings 6
General Safety Information 7
VI 34450A User’s Guide 8
Environmental Conditions 9
2002/96/EC 10
Additional Notices 11
In This Guide… 13
XII 34450A User’s Guide 14
Contents 15
XIV 34450A User’s Guide 16
34450A User’s Guide XV 17
XVI 34450A User’s Guide 18
34450A User’s Guide XVII 19
XVIII 34450A User’s Guide 20
Figures 20
34450A User’s Guide XIX 21
XX 34450A User’s Guide 22
Getting Started Tutorial 23
The Front Panel at a Glance 24
The display at a glance 25
Single display screen 25
Dual display screen 25
4 34450A User’s Guide 26
1 Getting Started Tutorial 26
Getting Started Tutorial 1 27
34450A User’s Guide 5 27
The Keypad at a Glance 28
34450A User’s Guide 7 29
Feature Upgrades 31
The Rear Panel at a Glance 32
Making Measurements 33
Digit masking 34
(HI terminal) 35
14 34450A User’s Guide 36
Measuring resistance 37
16 34450A User’s Guide 38
34450A User’s Guide 17 39
18 34450A User’s Guide 40
34450A User’s Guide 19 41
Testing continuity 42
Checking diodes 43
Measuring temperature 44
Measuring capacitance 45
Selecting a Range 46
Remote Operation 47
Serial interface 48
GPIB IEEE-488 (Optional) 49
Code compatibility mode 50
SCPI commands 50
30 34450A User’s Guide 52
Functions and Features 53
Math Operations 54
Null measurement 55
– Offset 56
Hold measurement 57
Limit measurement 58
Accessing math menu 59
Editing single statistics 60
Editing all statistics 61
Editing dB measurement 62
Editing dBm measurement 63
Math annunciators 64
Editing values 65
The Dual Display 66
Using the dual display 67
Using the Utility Menu 69
48 34450A User’s Guide 70
2 Functions and Features 70
Functions and Features 2 71
34450A User’s Guide 49 71
RS232 utility sub-menu 73
52 34450A User’s Guide 74
GPIB Utility Sub-Menu 75
Reading error messages 76
The beeper 77
Reset/Power-On State 80
34450A User’s Guide 59 81
Triggering the Multimeter 82
Software (Bus) Triggering 83
External Trigger 84
Trigger Out 84
Manual Trigger 85
Data Logging 87
34450A User’s Guide 67 89
Viewing the log info 91
Viewing the log list 92
Viewing the log histogram 93
Viewing the log statistics 94
Measurement Tutorial 97
DC Measurement Considerations 98
Noise Rejection 99
Noise Caused by Ground Loops 100
Offset Compensation 107
EMF) - VEMF = I*R 108
True RMS AC Measurements 109
AC Filter 112
Frequency measurement errors 113
DC current measurements 114
Capacitance measurements 115
Temperature measurements 117
Loading Errors (AC volts) 118
Measurements Below Full Scale 118
Low- Level Measurement Errors 119
Pulse Measurement Error 120
Specifications 121
Test Considerations 122
DC Specifications 123
102 34450A User’s Guide 124
4 Specifications 124
AC Specifications 125
104 34450A User’s Guide 126
Specifications 4 127
34450A User’s Guide 105 127
Operating Specifications 128
34450A User’s Guide 107 129
108 34450A User’s Guide 130
34450A User’s Guide 109 131
110 34450A User’s Guide 132
34450A User’s Guide 111 133
General Characteristics 134
34450A User’s Guide 113 135
Accuracy specifications 137
DC voltage measurements 138
Contact us 139
*34450-90000* 140

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