Agilent 34401A六半位数万用表维修手册：电气原理与服务指南

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Contents

DC Characteristics

Accuracy Specifications ± ( % of reading + % of range ) [ 1 ]

Function

Range [ 3 ]

Test Current or

Burden Voltage

90 Day

23°C

± 5°C

1 Year

23°C ± 5°C

Temperature

Coefficient /°C

0°C – 18°C

28°C – 55°C

DC Voltage 100.0000 mV

1.000000 V

10.00000 V

100.0000 V

1000.000 V

0.0030 + 0.0030

0.0020 + 0.0006

0.0015 + 0.0004

0.0020 + 0.0006

0.0040 + 0.0035

0.0030 + 0.0007

0.0020 + 0.0005

0.0035 + 0.0006

0.0035 + 0.0010

0.0050 + 0.0035

0.0040 + 0.0007

0.0035 + 0.0005

0.0045 + 0.0006

0.0045 + 0.0010

0.0005 + 0.0005

0.0005 + 0.0001

Resistance

[ 4 ]

100.0000

Ω

1.000000 kΩ

10.00000 kΩ

100.0000 kΩ

1.000000 MΩ

10.00000 MΩ

100.0000 MΩ

1 mA

100

µA

500 nA

500 nA || 10 M

Ω

0.0030 + 0.0030

0.0020 + 0.0005

0.002 + 0.001

0.015 + 0.001

0.300 + 0.010

0.008 + 0.004

0.008 + 0.001

0.020 + 0.001

0.800 + 0.010

0.010 + 0.004

0.010 + 0.001

0.040 + 0.001

0.800 + 0.010

0.0006 + 0.0005

0.0006 + 0.0001

0.0010 + 0.0002

0.0030 + 0.0004

0.1500 + 0.0002

DC Current 10.00000 mA

100.0000 mA

1.000000 A

3.000000 A

< 0.1 V

< 0.6 V

< 1 V

< 2 V

0.005 + 0.010

0.01 + 0.004

0.05 + 0.006

0.10 + 0.020

0.030 + 0.020

0.030 + 0.005

0.080 + 0.010

0.120 + 0.020

0.050 + 0.020

0.050 + 0.005

0.100 + 0.010

0.120 + 0.020

0.002 + 0.0020

0.002 + 0.0005

0.005 + 0.0010

0.005 + 0.0020

Continuity 1000.0

Ω 1 mA 0.002 + 0.030 0.008 + 0.030 0.010 + 0.030 0.001 + 0.002

Diode Test

[12]

1.0000 V 1 mA 0.002 + 0.010 0.008 + 0.020 0.010 + 0.020 0.001 + 0.002

DC:DC Ratio 100 mV

1000 V

( Input Accuracy ) + ( Reference Accuracy )

Input Accuracy = accuracy specification for the HI-LO input signal.

Reference Accuracy = accuracy specification for the HI-LO reference input signal.

Transfer Accuracy ( typical )

( 24 hour %

of range error )

Conditions:

 Within 10 minutes and ± 0.5°C.

 Within

±10% of initial value.

 Following a 2-hour warm-up.

 Fixed range between 10% and 100% of full scale.

 Using 6

⁄

digit slow resolution ( 100 PLC ).

 Measurements are made using accepted metrology practices.

24 Hour [ 2 ]

23°C

± 1°C

Chapter 1 Specifications

DC Characteristics

Function

DCV, DCI, and

Resistance

Digits

⁄

Readings/s

0.6 (0.5)

6 (5)

60 (50)

300

1000

Additional

Noise Error

0% of range

0.001% of range

0.01% of range

System Speeds

[ 9 ]

Function Change

Range Change

Autorange Time

ASCII readings to RS-232

ASCII readings to GPIB

Max. Internal Trigger Rate

Max. External Trigger Rate to Memory

Max. External Trigger Rate to GPIB

26/sec

50/sec

<30 ms

55/sec

1000/sec

900/sec

Operating Characteristics [ 8 ]

[10]

Measurement Noise Rejection

60 Hz ( 50 Hz ) [ 5 ]

DC CMRR

Integration Time

100 PLC / 1.67s (2s)

10 PLC / 167 ms (200 ms)

1 PLC / 16.7 ms (20 ms)

0.2 PLC / 3 ms (3 ms)

0.02 PLC / 400

µs (400 µs)

140 dB

Normal Mode Rejection

[ 6 ]

60 dB [ 7 ]

0 dB

[12] Accuracy specifications are for the voltage measured at

the input terminals only. 1mA test current is typical. Variation

in the current source will create some variation in the voltage

drop across a diode junction.

DC Voltage

Measurement Method:

A/D Linearity:

Input Resistance:

0.1 V, 1 V, 10 V ranges

100 V, 1000 V ranges

Input Bias Current:

Input Terminals:

Input Protection:

Resistance

Measurement Method:

Max. Lead Resistance:

(4-wire ohms)

Input Protection:

DC Current

Shunt Resistor:

Input Protection:

Continuity / Diode Test

Response Time:

Continuity Threshold:

DC:DC Ratio

Measurement Method:

Input HI-LO

Reference HI-Input LO

Input to Reference

Continuously integrating, multi-slope III

A/D converter.

0.0002% of reading + 0.0001% of range

Selectable 10 M

Ω or >10 GΩ [11]

10 MΩ ±1%

< 30 pA at 25°C

Copper alloy

1000 V on all ranges

Selectable 4-wire or 2-wire ohms.

Current source referenced to LO input.

10% of range per lead for 100

Ω, 1 kΩ

ranges. 1 k

Ω per lead on all other ranges.

1000 V on all ranges

0.1

Ω for 1A, 3A. 5Ω for 10 mA, 100 mA

Externally accessible 3A, 250 V fuse

Internal 7A, 250 V fuse

300 samples/sec with audible tone

Adjustable from 1

Ω to 1000 Ω

Input HI-LO / Reference HI-LO

100 mV to 1000 V ranges

100 mV to 10 V ranges (autoranged)

Reference LO to Input LO voltage < 2 V

Reference HI to Input LO voltage < 12V

Measuring Characteristics

Teflon is a registered trademark of E.I. duPont deNemours and Co.

Autozero OFF Operation

Following instrument warm-up at calibration temperature ±1°C

and <10 minutes, add 0.0002% range additional error + 5 µV.

Settling Considerations

Reading settling times are affected by source impedance,

cable dielectric characteristics, and input signal changes.

Measurement Considerations

Agilent recommends the use of Teflon

or other high-impedance,

low-dielectric absorption wire insulation for these measurements.

[ 1 ] Specifications are for 1-hour warm-up at 6

⁄

digits.

[ 2 ] Relative to calibration standards.

[ 3 ] 20% overrange on all ranges, except 1000 Vdc, 3 A range.

[ 4 ] Specifications are for 4-wire ohms function, or 2-wire

ohms using Math Null. Without Math Null, add 0.2

Ω

additional error in 2-wire ohms function.

[ 5 ] For 1 kΩ unbalance in LO lead.

[ 6 ] For power-line frequency ± 0.1%.

[ 7 ] For power-line frequency ± 1%, subtract 20 dB.

For

± 3%, subtract 30 dB.

[ 8 ] Readings speeds for 60 Hz and ( 50 Hz ) operation,

Autozero Off.

[ 9 ] Speeds are for 4

⁄

digits, Delay 0, Autozero OFF,

and Display OFF. Includes measurement and data

transfer over GPIB.

[ 10 ] Add 20 µV for dc volts, 4 µA for dc current, or

20 m

Ω for resistance.

[ 11 ] For these ranges, inputs beyond ±17V are

clamped through 100 k

Ω (typical).

Chapter 1 Specifications

AC Characteristics

Accuracy Specifications ± ( % of reading + % of range ) [ 1 ]

Function Range [ 3 ] Frequency

24 Hour [ 2 ]

23°C

± 1°C

1 Year

23°C ± 5°C

Temperature

Coefficient/°C

0°C – 18°C

28°C – 55°C

True RMS

AC Voltage

[ 4 ]

100.0000 mV

1.000000 V

750.000 V

3 Hz – 5 Hz

5 Hz – 10 Hz

10 Hz – 20 kHz

20 kHz – 50 kHz

50 kHz – 100 kHz

100 kHz – 300 kHz

[6]

3 Hz – 5 Hz

5 Hz – 10 Hz

10 Hz – 20 kHz

20 kHz – 50 kHz

50 kHz – 100 kHz

[5]

100 kHz – 300 kHz [6]

1.00 + 0.03

0.35 + 0.03

0.04 + 0.03

0.10 + 0.05

0.55 + 0.08

4.00 + 0.50

1.00 + 0.02

0.35 + 0.02

0.04 + 0.02

0.10 + 0.04

0.55 + 0.08

4.00 + 0.50

1.00 + 0.04

0.35 + 0.04

0.05 + 0.04

0.11 + 0.05

0.60 + 0.08

4.00 + 0.50

1.00 + 0.03

0.35 + 0.03

0.05 + 0.03

0.11 + 0.05

0.60 + 0.08

4.00 + 0.50

1.00 + 0.04

0.35 + 0.04

0.06 + 0.04

0.12 + 0.05

0.60 + 0.08

4.00 + 0.50

1.00 + 0.03

0.35 + 0.03

0.06 + 0.03

0.12 + 0.05

0.60 + 0.08

4.00 + 0.50

0.100 + 0.004

0.035 + 0.004

0.005 + 0.004

0.011 + 0.005

0.060 + 0.008

0.20 + 0.02

0.100 + 0.003

0.035 + 0.003

0.005 + 0.003

0.011 + 0.005

0.060 + 0.008

0.20 + 0.02

True RMS

AC Current

[ 4 ]

1.000000 A

3.00000 A

3 Hz – 5 Hz

5 Hz – 10 Hz

10 Hz – 5 kHz

3 Hz – 5 Hz

5 Hz – 10 Hz

10 Hz – 5 kHz

1.00 + 0.04

0.30 + 0.04

0.10 + 0.04

1.10 + 0.06

0.35 + 0.06

0.15 + 0.06

1.00 + 0.04

0.30 + 0.04

0.10 + 0.04

1.10 + 0.06

0.35 + 0.06

0.15 + 0.06

1.00 + 0.04

0.30 + 0.04

0.10 + 0.04

1.10 + 0.06

0.35 + 0.06

0.15 + 0.06

0.100 + 0.006

0.035 + 0.006

0.015 + 0.006

0.100 + 0.006

0.035 + 0.006

0.015 + 0.006

Additional Low Frequency Errors ( % of reading )

Frequency

AC Filter

Slow Medium Fast

0 0.74 ––

0 0.22 ––

0 0.06 0.73

0 0.01 0.22

0 0 0.18

0 0 0

10 Hz – 20 Hz

20 Hz – 40 Hz

40 Hz – 100 Hz

100 Hz – 200 Hz

200 Hz – 1 kHz

> 1 kHz

Sinewave Transfer Accuracy ( typical )

Frequency

10 Hz – 50 kHz

50 kHz – 300 kHz

Error ( % of range )

0.002%

0.005%

Conditions:

 Sinewave input.

 Within 10 minutes and ± 0.5°C.

 Within ±10% of initial voltage and ±1% of initial frequency.

 Following a 2-hour warm-up.

 Fixed range between 10% and 100% of full scale ( and <120 V ).

 Using 6

⁄

digit resolution.

 Measurements are made using accepted metrology practices.

90 Day

23°C

± 5°C

Additional Crest Factor Errors ( non-sinewave ) [ 7 ]

Crest Factor

1 – 2

2 – 3

3 – 4

4 – 5

Error ( % of reading )

0.05%

0.15%

0.30%

0.40%

Chapter 1 Specifications

剩余162页未读，继续阅读

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