HP 34401a schematic

Agilent 34401A Multimeter

Uncompromising Performance
for Benchtop and System Testing

Product Overview

• Measure up to 1000 volts with
6

1

⁄2digits resolution

• 0.0015% basic dcV accuracy
(24 hour)

• 0.06% basic acV accuracy
(1 year)

• 3Hz to 300kHz ac bandwidth

• 1000 readings/sec. direct to GPIB

Superior performance

The Agilent Technologies 34401A
multimeter gives you the performance
you need for fast, accurate bench and
system testing. The 34401A provides
a combination of resolution, accuracy
and speed that rivals DMMs costing
many times more. 6

1

⁄2-digits of resolu­tion, 0.0015% basic 24-hr dcV accu­racy and 1,000 readings/sec direct to
GPIB assure you of results that are
accurate, fast, and repeatable.

Use it on your benchtop

The 34401A was designed with your
bench needs in mind. Functions com­monly associated with bench opera­tion, like continuity and diode test,
are built in. A Null feature allows you
to remove lead resistance and other
fixed offsets in your measurements.

Other capabilities like min/max/avg
readouts and direct dB and dBm
measurements make checkout with
the 34401A faster and easier.

The 34401A gives you the ability to
store up to 512 readings in internal
memory. For trouble-shooting, a
reading hold feature lets you
concentrate on placing your test
leads without having to constantly
glance at the display.

Use it for systems testing

For systems use, the 34401A gives
you faster bus throughput than any
other DMM in its class. The 34401A
can send up to 1,000 readings/sec
directly across GPIB in user-friendly
ASCII format.

You also get both GPIB and RS-232
interfaces as standard features.
Voltmeter Complete and External
Trigger signals are provided so you
can synchronize to other instruments
in your test system. In addition, a
TTL output indicates Pass/Fail
results when limit testing is used.

To ensure both forward and back­ward compatibility, the 34401A
includes three command languages
(SCPI, Agilent 3478A and Fluke
8840A /42A), so you don’t have to
rewrite your existing test software. An
optional rack mount kit is available.

Easy to use

Commonly accessed attributes, such
as functions, ranges, and resolution
are selected with a single button press.

Advanced features are available using
menu functions that let you optimize
the 34401A for your applications.

The included Agilent IntuiLink
software allows you to put your
captured data to work easily, using
PC applications such as Microsoft
Excel® or Word® to analyze, interpret,
display, print, and document the
data you get from the 34401A. You
can specify the meter setup and take
a single reading or log data to the
Excel spreadsheet in specified time
intervals. Programmers can use
ActiveX components to control the
DMM using SCPI commands. To find
out more about IntuiLink, visit

www.agilent.com/find/intuilink

1-year Warranty

With your 34401A, you get full
documentation, a high-quality test
lead set, calibration certificate with
test data, and a 1-year warranty,
all for one low price.

2

Accuracy Specifications ± (% of reading + % of range)

[1]

Temperature
Coefficient

Frequency, 24 Hour

[2]

90 Day 1 Year 0°C – 18°C

Function Range

[3]

etc. 23°C ± 1°C 23°C ± 5°C 23°C ± 5°C 28°C – 55°C

dc Voltage 100.0000 mV 0.0030 + 0.0030 0.0040 + 0.0035 0.0050 + 0.0035 0.0005 + 0.0005

1.000000 V 0.0020 + 0.0006 0.0030 + 0.0007 0.0040 + 0.0007 0.0005 + 0.0001

10.00000 V 0.0015 + 0.0004 0.0020 + 0.0005 0.0035 + 0.0005 0.0005 + 0.0001

100.0000 V 0.0020 + 0.0006 0.0035 + 0.0006 0.0045 + 0.0006 0.0005 + 0.0001

1000.000 V 0.0020 + 0.0006 0.0035 + 0.0010 0.0045 + 0.0010 0.0005 + 0.0001

True rms 100.0000 mV 3 Hz - 5 Hz 1.00 + 0.03 1.00 + 0.04 1.00 + 0.04 0.100 + 0.004
ac Voltage

[4]

5 Hz - 10 Hz 0.35 + 0.03 0.35 + 0.04 0.35 + 0.04 0.035 + 0.004
10 Hz - 20 kHz 0.04 + 0.03 0.05 + 0.04 0.06 + 0.04 0.005 + 0.004
20 kHz - 50 kHz 0.10 + 0.05 0.11 + 0.05 0.12 + 0.04 0.011 + 0.005
50 kHz - 100 kHz 0.55 + 0.08 0.60 + 0.08 0.60 + 0.08 0.060 + 0.008
100 kHz - 300 kHz

[6]

4.00 + 0.50 4.00 + 0.50 4.00 + 0.50 0.20 + 0.02

1.000000 V 3 Hz - 5 Hz 1.00 + 0.02 1.00 + 0.03 1.00 + 0.03 0.100 + 0.003
to 5 Hz - 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003

750.000 V 10 Hz - 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 kHz - 50 kHz 0.10 + 0.04 0.11 + 0.05 0.12 + 0.04 0.011 + 0.005
50 kHz - 100 kHz

[5]

0.55 + 0.08 0.60 + 0.08 0.60 + 0.08 0.060 + 0.008

100 kHz - 300 kHz

[6]

4.00 + 0.50 4.00 + 0.50 4.00 + 0.50 0.20 + 0.02

Resistance

[7]

100.0000 Ω 1 mA Current Source 0.0030 + 0.0030 0.008 + 0.004 0.010 + 0.004 0.0006 + 0.0005

1.000000 kΩ 1 mA 0.0020 + 0.0005 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001

10.00000 kΩ 100 µA 0.0020 + 0.0005 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001

100.0000 kΩ 10 µA 0.0020 + 0.0005 0.008 + 0.001 0.010 + 0.001 0.0006 + 0.0001

1.000000 MΩ 5.0 µA 0.002 + 0.001 0.008 + 0.001 0.010 + 0.001 0.0010 + 0.0002

10.00000 MΩ 500 nA 0.015 + 0.001 0.020 + 0.001 0.040 + 0.001 0.0030 + 0.0004

100.0000 MΩ 500 nA || 10MΩ 0.300 + 0.010 0.800 + 0.010 0.800 + 0.010 0.1500 + 0.0002

dc Current 10.00000 mA <0.1 V Burden Voltage 0.005 + 0.010 0.030 + 0.020 0.050 + 0.020 0.002 + 0.0020

100.0000 mA <0.6 V 0.010 + 0.004 0.030 + 0.005 0.050 + 0.005 0.002 + 0.0005

1.000000 A <1 V 0.050 + 0.006 0.080 + 0.010 0.100 + 0.010 0.005 + 0.0010

3.00000 A <2 V 0.100 + 0.020 0.120 + 0.020 0.120 + 0.020 0.005 + 0.0020

True rms 1.000000 A 3 Hz - 5 Hz 1.00 + 0.04 1.00 + 0.04 1.00 + 0.04 0.100 + 0.006
ac Current

[4]

5 Hz - 10 Hz 0.30 + 0.04 0.30 + 0.04 0.30 + 0.04 0.035 + 0.006

10 Hz - 5 kHz 0.10 + 0.04 0.10 + 0.04 0.10 + 0.04 0.015 + 0.006

3.00000 A 3 Hz - 5 Hz 1.10 + 0.06 1.10 + 0.06 1.10 + 0.06 0.100 + 0.006
5 Hz - 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.035 + 0.006
10 Hz - 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006

Frequency 100 mV 3 Hz - 5 Hz 0.10 0.10 0.10 0.005
or Period

[8]

to 5 Hz - 10 Hz 0.05 0.05 0.05 0.005

750 V 10 Hz - 40 Hz 0.03 0.03 0.03 0.001

40 Hz - 300 kHz 0.006 0.01 0.01 0.001

Continuity 1000.0Ω 1mA Test Current 0.002 + 0.010 0.008 + 0.020 0.010 + 0.020 0.001 + 0.002

Diode Test

[9]

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

[1] Specifications are for 1hr warm-up and 61⁄2digits, Slow ac filter.
[2] Relative to calibration standards.
[3] 20% over range on all ranges except 100 0 Vdc and 750 Vac ranges.
[4] For sinewave input > 5% of range. For inputs from 1% to 5% of range

and < 50 kHz, add 0.1% of range additional error.
[5] 750 V range limited to 100 kHz or 8 x107 Volt-Hz.
[6] Typically 30% of reading error at 1 MHz.
[7] 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.
[8] Input >100 mV. For 10 mV to 100 mV inputs multiply % of reading error x10.
[9] 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.

254.4 mm

212.6 mm

103.6 mm

374.0 mm

88.5 mm

348.3 mm