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2 Making Measurements

Measuring Resistance

40 U1231A/U1232A/U1233A User’s Guide

Figure 2-9 Measuring resistance

NOTE

• Because the multimeter’s test current flows through all possible paths

between the probe tips, the measured value of a resistor in a circuit is

often different from the resistor’s rated value.

• The resistance function can produce enough voltage to forward-bias

silicon diodes or transistor junctions, causing them to conduct. If this is

suspected, press to apply a lower current in the next higher range.

Resistor

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 132 133

Agilent U1231A, U1232A 1
Digital Multimeter 1
Safety Symbols 3
Safety Considerations 4
Environmental Conditions 6
Regulatory Markings 7
Table of Contents 11
3 Multimeter Features 12
4 Multimeter Setup Options 12
List of Figures 15
List of Tables 17
Introduction 19
About This Manual 20
Preparing Your Multimeter 21
Introduction 1 23
Turning on your multimeter 24
Automatic Power-Off (APO) 24
Enabling the backlight 25
Enabling the flashlight 25
HELP and dEMo modes 26
Selecting the range 27
Voltage alert 28
Hazardous voltage indication 28
Adjusting the tilt stand 29
Connecting the IR-USB cable 29
Power-on options 31
1 Introduction 32
Your Multimeter in Brief 33
Rear and side view 34
Overview 35
Rear panel 36
Rotary switch 37
Display screen 42
Measurement units 44
Analog bar graph 45
Input terminals 46
Cleaning Your Multimeter 48
Making Measurements 49
Measuring AC Voltage 50
Voltage source 51
Measuring DC Voltage 52
Using VZ 54
for Voltage Measurements 54
Adjacent unused wiring 55
Energized wiring 55
to test a battery’s health 56
Measuring Resistance 57
Resistor 58
Testing for Continuity 59
2 Making Measurements 62
Tes ting Diode s 63
Forward bias diode 65
Reverse bias diode 66
Measuring Capacitance 67
Capacitance 68
Measuring Temperature 69
Making Measurements 2 71
Measuring AC or DC Current 75
Measuring Frequency 80
Multimeter Features 83
> 1 s 85
3Multimeter Features 96
Multimeter Setup Options 97
Using the Setup Menu 98
Setup Menu Summary 100
Multimeter Setup Options 4 101
Setup Menu Items 102
030.d V 104
(disabled) 104
Changing the beep frequency 105
(enabled) 106
(15.E) minutes 106
(15.E) seconds 107
(15.d) seconds 109
Pr e s s 111
Resetting the Setup items 114
Changing the temperature unit 117
°C °C, °C°F, °F, or °F°C °C 118
Agilent Technologies 119
Product Characteristics 120
Specification Assumptions 122
Measurement Category 123
Electrical Specifications 124
AC specifications 127
Capacitance specifications 128
Temperature specifications 129
Frequency specifications 130
Scale transfer (mV) 131

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Agilent Technologies U1231A Guía de usuario Pagina 58

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