Agilent Technologies 34411A Guia do Utilizador Página 118
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118 34410A/11A/L4411A User’s Guide
4 Measurement Tutorial
For ac voltage, additional settling time may be required when the dc level
varies from sample to sample. The default sample delays allow for a dc level
change of 3% of range for all filters. If the dc level change exceeds these levels,
additional settling time is required. The multimeter's dc blocking circuitry has
a settling time constant of 0.2 seconds. This settling time only affects
measurement accuracy when dc offset levels vary from sample to sample. If
maximum measurement speed is desired in a scanning system, you may want
to add an external dc blocking circuit to those channels with significant dc
voltages present. This circuit can be as simple as a resistor and a capacitor.
For ac current, additional settling time is not required when the dc level varies
sample to sample.
Making High–Speed dc and Resistance Measurements
The multimeter incorporates an automatic zero measurement procedure
(autozero) to eliminate internal thermal EMF and bias current errors. Each
measurement actually consists of a measurement of the input terminals
followed by a measurement of the internal offset voltage. The internal offset
voltage error is subtracted from the input for improved accuracy. This
compensates for offset voltage changes due to temperature. For maximum
reading speed, turn autozero off. This will more than double your reading
speeds for dc voltage, resistance, and dc current functions. Autozero does not
apply to other measurement functions.
UG_ED5.book Page 118 Thursday, March 1, 2012 11:28 AM
- Agilent 34410A/11A 1
- 6 ½ Digit Multimeter 1
- Safety Information 3
- Ω 4W"). The Protec 4
- Additional Notices 5
- Standard Limit 6
- (true-rms) 7
- (34410A/11A) 9
- Functions” 10
- In This Guide… 11
- Quick Start 13
- Basic Multimeter Operations 14
- Front-Panel Keys 15
- To Measure DC Voltage 18
- To M ea s u re A C Vo ltag e 18
- To Measure DC Current 19
- To Measure AC Current 19
- Connect test leads as shown: 20
- Resistance 20
- To Measure Frequency 21
- To M ea s u re Pe riod 21
- To M ea s u re C apacita nce 22
- Thermistor or RTD 23
- To Test C ontinu ity 24
- To Ch ec k D iode s 24
- ~ voltage 24
- ~ 0.8V (not adjustable) 24
- Other Basics of Operation 25
- 1Quick Start 26
- To Adjust the Carrying Handle 27
- Contents 29
- Features and Functions 35
- Triggering the Multimeter 67 36
- Data Logging 78 36
- System-Related Operations 82 36
- Power-On and Reset State 85 36
- SCPI Commands 37
- Front Panel Display 38
- Annunciators 40
- <feed> 41
- ManRng annunciator 42
- Continuity and Diode Tests 47
- Multimeter State Storage 48
- Accessing Reading Memory 49
- Multimeter Reset 50
- DC Measurements 51
- DC Input Impedance 53
- AC Measurements 54
- Gate Time 55
- Auto Zero 56
- <function> 56
- Null Measurements 59
- Radix Character (34410A/11A) 60
- Beeper (34410A/11A) 61
- Math Functions 62
- Using Statistics 65
- Limit Testing 66
- Triggering the Multimeter 67
- Auto Triggering (34410A/11A) 68
- Reading Hold (34410A/11A) 69
- Immediate Triggering 69
- <level> 70
- Number of Samples per Trigger 71
- Trigger Delay 72
- Automatic Trigger Delay 73
- External Triggering 75
- Trigger Slope 77
- Data Logging 78
- System-Related Operations 82
- Error Conditions 83
- Reading the Error Queue 84
- NISPOM Memory Sanitization 84
- Calibration 84
- Power-On and Reset State 85
- Stored States ● No change 86
- Enabled 86
- Remote annunciator turns 88
- Configuring the USB Interface 90
- Configuring the LAN Interface 91
- Configuring LAN Parameters 92
- IP Address 93
- Subnet Mask 93
- Default Gateway 94
- Host Name 94
- DNS Server 95
- Web Password 95
- Measurement Tutorial 99
- High-Speed Measurements 117 100
- DC Measurement Considerations 101
- Noise Rejection 102
- Noise Caused by Ground Loops 103
- 4–Wire Ohms Measurements 104
- True RMS AC Measurements 106
- Measurement Tutorial 4 109
- 10, provided there 111
- DC Current Measurements 112
- Capacitance Measurements 113
- Temperature Measurements 115
- Auto Zero On/Off 116
- Integration 116
- Offset Compensation 116
- NULL Reading: 116
- High-Speed Measurements 117
- Settling Time Effects 119
- Loading Errors (ac volts) 119
- Measurements Below Full Scale 120
- Low–Level Measurement Errors 120
- Common Mode Errors 122
- Leakage Current Errors 122
- Specifications 123
- DC Characteristics 125
- 5 Specifications 126
- Trans fe r Accuracy (Typical) 126
- AC Characteristics 128
- Specifications 5 131
- Frequency and Period 131
- Measurement Considerations 131
- Settling Considerations 131
- Capacitance Characteristics 132
- Temperature Characteristics 132
- Measurement and System Speeds 134
- System Speeds 135
- Data From Memory 136
- Triggering and Memory 137
- Dimensions 138
- \0.003% of 5 VDC 140
- \30 ppm of 5 VDC 140
- Trans fe r A c cur ac y 141
- 24–Hour Accuracy 141
- 90–Day and 1–Year Accuracy 141
- Temperature Coefficients 141
- for dc voltage measurements 142
- Agilent Technologies 143
- √ Documents & Downloads 144
- √ Instrument Drivers 147
- Directive, 5 152
- Web Browser, 98 152
- Web Password, 91, 95 152
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