Keysight
34401 A Multimeter
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
What it is
How it works
The 34401A measures direct current and alternating current voltage, direct current and alternating current current, two-wire resistance, four-wire resistance, diode voltage, continuity, frequency, and period.[1]
The 34401A uses a continuously integrating multi-slope analog-to-digital converter for direct voltage measurements.[1]
The 34401A supports GPIB and RS-232 interfaces as standard features and includes SCPI, Keysight 3478A, and Fluke8840A/42A command languages.[1]
Where it fits in the process flow
The 34401A is used for system testing with external trigger and voltmeter complete signals for synchronization to other instruments.[1]
Applications
What do the numbers mean?
Power & electrical3
- Measurement functions
- DC/AC voltage, DC/AC current, 2- and 4-wire resistance, diode, continuity, frequency, period[1]
Optics & imaging1
Performance2
Control & software1
Dimensions & facilities1
Configuration & options9
Vintage & configurations
- 2016-12-01End of life[1]
The 34401A DMM and all associated options were discontinued on December 1, 2016.
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What measurement functions does the 34401A provide?
The 34401A provides ten measurement functions: direct current voltage, alternating current voltage, direct current current, alternating current current, two-wire resistance, four-wire resistance, diode, continuity, frequency, and period.[1]
What is the maximum input rating of the 34401A?
The 34401A has a maximum voltage input of 1000 volts and a maximum current input of 3 amperes.[1]
What are the resolution and basic accuracy figures for the 34401A?
The 34401A has 6½ digit resolution, 0.0035 percent basic direct current accuracy, and 0.06 percent basic alternating current accuracy.[1]
What interface options are standard on the 34401A?
The 34401A includes GPIB and RS-232 interfaces as standard features.[1]
How much reading memory does the 34401A have?
The 34401A has 512 readings of internal memory.[1]
Not publicly documented
The following facts about the 34401 A Multimeter are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented variants, configuration options, or revision breakpoints of the 34401 A Multimeter are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the 34401 A Multimeter are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 34401 A Multimeter are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 34401 A Multimeter is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 34401 A Multimeter are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (4)Every fact above is drawn from these public sources
- [1]keysight.com — keysight.comkeysight.com
- [2]Equipment inventory listing
- [3]https://www.testequipmenthq.com/datasheets/Keysight-34401A-Datasheet.pdf — testequipmenthq.comtestequipmenthq.com
- [4]Equipment inventory listing
Last updated Oct 6, 2026.
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