Keysight
34401 A DMM
The Keysight / Agilent 34401 A is a 6-1/2 digit digital multimeter. The Keysight / Agilent 34401 A accepts a maximum low input of 200 V and a maximum high input of 1000 V.[1][2][3]
What it is
How it works
General reference — not yet source-verifiedA digital multimeter measures electrical quantities by converting an input signal into a digital reading.
A digital multimeter commonly accepts voltage at more than one input range and can present the result as a numeric display for direct reading.
Why won't it start?
Documented failure modes, common issues, and field considerations.
- One source states the unit does not power on.
- One source states the unit powers on and reads accurate voltage.
What do the numbers mean?
Power & electrical6
- Unit powers on and reads accurate voltage[1]
Optics & imaging1
Configuration & options8
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 types of measurements can a digital multimeter of this class perform?General reference — not yet source-verified
Such instruments measure DC and AC voltage, DC and AC current, resistance (both two-wire and four-wire), frequency, period, and continuity. Some models also support diode testing and temperature measurement with appropriate probes.
How is measurement accuracy specified for this class of DMM?General reference — not yet source-verified
Accuracy is typically given as a percentage of reading plus a percentage of range, sometimes with additional temperature coefficient and time stability specifications. Calibration intervals are recommended to maintain stated accuracy.
What is the typical resolution of such a DMM?General reference — not yet source-verified
High-resolution DMMs can display readings with up to several digits, providing fine granularity for small signal changes. Resolution depends on the selected range and measurement function.
What environmental factors affect measurement performance?General reference — not yet source-verified
Temperature, humidity, and electrical noise can influence accuracy. Instruments of this class are often designed with temperature compensation and shielding, but best performance is achieved in stable, controlled laboratory conditions.
Not publicly documented
The following facts about the 34401 A DMM 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 production dates or lifecycle milestones (introduction, end of production, EOL) for the 34401 A DMM are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the 34401 A DMM 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 DMM are not on record.
Answerable by: an engineer who operated it or OEM installation records
The process node or technology generation of the 34401 A DMM 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 DMM are on record.
Answerable by: an OEM parts catalog or a service engineer
Sources & citations
Sources (3)Every fact above is drawn from these public sources
- [1]Inventory photo
- [2]Inventory photo
- [3]inventory listing
Last updated Oct 3, 2026.
Compare with similar tools
View all →
The Applied Materials 0010-13627 is a high efficiency RF match designed for semiconductor equipment.