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Digital Multimeters
ni.comContents
PXI Digital Multimeters
Digital Multimeter Devices
Key Features
SoftwareSupporting Documentation
Configure a Custom NI System
What is PXI?
PXI Instrumentation
Hardware Services

ni.comPXI Digital Multimeters
PXI-4065, PXIe-4080, PXIe-4081, and PXIe-4082

FIGURE 1
PXI-4065, PXIe-4081, and PXIe-4082 Digital Multimeters

Software: Includes interactive soft front panel inInstrumentStudioᵀᴹ software, API support for LabVIEW andtext-based languages, shipping examples, and detailed help
files

Resistance measurements up to 5 GΩUp to ±500 VDC/VRMS common-mode isolation
Up to 1.8 MS/s isolated, 1,000 V waveform acquisition

Voltage measurements up to 1,000 VDC (700 VAC)
Current measurements up to 3 A

Built for Automated Test and Measurement
PXI Digital Multimeters (DMMs) range from low-cost 6½-digit devices to high-performance 7½-digit models. Some models include
specialized features such as extended measurement ranges, an isolated digitizer mode with sample rates up to 1.8 MS/s, extended calibration
cycles, and basic inductance and capacitance measurements. Combined in a single instrument, these features provide a solution to themeasurement challenges inherent in traditional precision instruments: limited measurement throughput and flexibility. These DMMs deliver asmarter way to tackle difficult applications in industries ranging from consumer electronics to aerospace and defense.
NI’s DMM portfolio is highlighted by the PXIe-4081, the high-performance 7½-digit DMM. It provides 26 bits of resolution and high-stability,
metrology-class voltage measurements that range from 10 nV to 1,000 V, current measurements that range from 1 pA to 3 A, and resistancemeasurements that range from 10 µΩ to 5 GΩ.

ni.comDigital Multimeters01

Table 1. NI offers PXI DMMs ranging from low-cost 6½-digit options to the high-performance
7½-digit DMM.
PXI-4065

PXIe-4080

PXIe-4081

PXIe-4082

Basic
6½-Digit DMM

High-Performance 6½-Digit
DMM

High-Performance 7½Digit DMM

High-Performance 6½Digit DMM

Maximum Voltage (V)

300

300

1,000

300

Maximum Current (A)

3

1

3

1

Maximum Sample Rate

3 kS/s

1.8 MS/s

1.8 MS/s

1.8 MS/s

Basic Accuracy (10 VDC, 2Year)90 ppm¹

25 ppm12 ppm25 ppmMaximum Calibration Cycle

1-year2-year2-year2-yearDC and AC Voltage

●

●

●

●

DC and AC Current

●

●

●

●

2-Wire and 4-Wire Resistance

●

●

●

●

Frequency/Period

-

●

●

●

Basic Inductance/Capacitance

-

-

-

●

Description¹One-year calibration specifications are shown for the PXI-4065 because it does not include a two-year calibration option.

Detailed View Of PXIe-4081 7½ Digit DMM

Industry-standard connectivity

Timing and synchronization
Data streaming through PCI
Express

PXI ejector handle
FIGURE 2
The PXIe-4081 has the functionality of a box DMM with all the feature benefits of PXI.

ni.comDigital Multimeters

02Digital Multimeter Devices
USB-4065, PCI-4065, and PCIe-4065

FIGURE 3
USB-4065 and PCIe-4065 Digital Multimeter Devices

Software: Includes interactive soft front panel inInstrumentStudioᵀᴹ, API support for LabVIEW and textbased languages, shipping examples, and detailed help files

2-wire and 4-wire resistance measurements up to 100 MΩ

Voltage measurements up to 300 V

Up to 1.8 MS/s isolated, 300 V waveform acquisition

Up to ±300 VDC/VRMS common-mode isolation

Current measurements up to 3 A

Built for Automated Test and Measurement
NI’s PC-based DMMs perform AC/DC voltage, AC/DC current, and 2- or 4-wire resistance measurements, as well as diode tests. Somemodels include specialized features such as extended calibration cycles and an isolated, high-voltage digitizer mode with sample rates up to
1.8 MS/s. Combined in a single instrument, these features provide a solution to the measurement challenges inherent in traditional precision
instruments: limited measurement throughput and flexibility. These DMMs deliver a smarter way to tackle difficult applications in industries
ranging from consumer electronics to aerospace and defense.

ni.comDigital Multimeters

03Table 2. NI offers DMMs ranging from low-cost USB-powered devices to high-performance PCIbased devices.
USB-4065

Description

PCI-4065

Basic 6½-Digit DMM

Maximum Voltage (V)300

Maximum Current (A)3Maximum Sample Rate (kS/s)

3

Voltage Accuracy (10 VDC, 2-Year)
Maximum Calibration Cycle

PCIe-4065

90 + 12 ppm
1-yearDC and AC Voltage●

DC and AC Current●

2-Wire and 4-Wire Resistance●Frequency/Period-

Detailed View of USB-4065 6½-Digit DMM
Compact size (7.0 in x 4.1 in x 1.3 in)
Bus-powered for
portability
Industry-standard connectivity
Lightweight (10 oz)

FIGURE 4
The USB-4065 DMM has the functionality of a traditional box DMM in a lightweight form factor with USB connectivity.

Key Features
High-Precision Measurements
The analog-to-digital converter (ADC) is the backbone of high-performance PXIe-408x DMMs. A unique combination of off-the-shelf highspeed ADC technology and a custom-designed sigma-delta converter provides the noise, linearity, and speed performance required toachieve high-speed and high-precision measurements.

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04

FIGURE 5
Over a 12-hour noise and drift test of 0 VDC with each DMM set to 100 mV input range with 10 power line cycle (PLC) aperture time, the PXIe-4081 (blue) outperforms boththe leading 6½-digit (light grey) and 7½-digit (dark grey) benchtop DMMs.

The PXIe-4081 uses stable onboard voltage references to provide steady performance across temperature and time. No other DMM in thisprice range offers this reference source and its accompanying stability, which is why the PXIe-4081 includes a two-year guaranteed accuracyof 12 ppm to further reduce the cost of test by minimizing downtime for instrument calibration. This beats the one-year accuracy
specifications of most traditional benchtop DMMs, providing you with more accurate measurements with lower cost of ownership and lessdowntime. The PXIe-4081 also uses advanced DMM measurement techniques such as offset compensated ohms, high-order DC noise
rejection, and self-calibration to ensure accurate measurements.

Flexible Measurement Rate with an Isolated Digitizer
Traditional DMMs are designed to provide high resolution and precision, with little regard to acquisition speed. The unique architecture of the
PXIe-408x DMMs offers a continuously variable reading rate that ranges from 7 S/s to 10 kS/s, so you can choose the sample rate andresolution you need for your application.

FIGURE 6
The unique combination of off-the-shelf high-speed ADC technology and a custom-designed sigma-delta converter optimizes linearity and noise for up to 7½-digit
precision and stability while offering digitizer sample rates up to 1.8 MS/s.

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05

FIGURE 7
PXIe-408x DMMs can acquire 36X faster than traditional benchtop DMMs, which gives you increased insight into your device under test.

Synchronization and Integration
NI PXI DMMs use the inherent timing and synchronization capabilities of the PXI platform to communicate with switches and other
instruments within the PXI chassis. You can use switches with a DMM to expand the instrument’s measurement capability to hundreds or
thousands of test points. NI DMMs “handshake” with NI switches by sending and receiving hardware-timed triggers over the PXI backplaneand scanning through a list of switch connections stored in memory on board the switch module. This method of scanning removes thesoftware overhead associated with traditional scan lists and can create a deterministic scan list for faster test execution with more
repeatable timing.

FIGURE 8
Depiction of the Scanning Process from the NI-SWITCH API to the DMM

Self-Calibration and Two-Year Guaranteed Specifications
NI DMMs offer self-calibration, which is traditionally found in only the highest resolution DMMs. Self-calibration corrects for all DC gain andoffset drifts within the DMM using a precision, high-stability internal voltage reference that has an outstanding temperature coefficient andtime drift that account for all resistance and current source drifts. Using the self-calibration feature makes NI DMMs highly accurate andstable at any operating temperature—well outside the traditional 18 °C to 28 °C range.

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06

FIGURE 9
Calibration Timeline

This operation takes less than a minute to complete and requires no external calibrator, which minimizes the maintenance burden of
deployed systems. PXIe-408x DMMs have a two-year external calibration cycle thanks to the self-calibration precision circuitry thatminimizes the maintenance burden of deployed systems. Visit ni.com to learn more about NI’s calibration services.

SoftwareSynchronization and Integration
In addition to the soft front panel in InstrumentStudio, the NI-DMM driver includes a best-in-class API that works with a variety ofdevelopment options such as LabVIEW, C, C#, and others. To ensure long-term interoperability of DMMs, the NI-DMM driver API is the same
API used for all past and current NI DMMs. The driver also provides access to help files, documentation, and dozens of ready-to-run shipping
examples you can use as a starting point for your application.

FIGURE 10LabVIEW VI Built with the NI-DMM API

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07

NI Software-The Right Tool for the Job
NI has a variety of software for engineers working on research, validation, and production test applications. Learn about our software thathelps engineers perform quick ad-hoc tests, build an automated test system, automate data analysis and reporting, develop test sequences,and more.

LabVIEW

DIAdemTestStand

Graphical programming environment thatengineers use to develop automatedresearch, validation, and production test
systems.

Data analytics software for measurement
data search, inspection, analysis, andautomated reporting.

Test executive software that accelerates
system development for engineers invalidation and production.

Acquire data from NI and third-party
hardware and communicate using
industry protocols
Use configurable, interactive display
elements
Take advantage of available analysis
functions

Display data in multiple 2D-axis
systems
Perform calculations with a simple
point-and-click interface
Automate your measurement data
analysis workflow, from import toanalysisCall and execute tests in LabVIEW,
Python, C/C++, or .NET
Conduct complex tasks, such asparallel testing
Create customer operator interfaces
and robust tools for deployment anddebugging

G Web

FlexLogger™

InstrumentStudio™

Development software that helps
engineers create web-based userinterfaces wihtout the need for traditional
web development skills.

No-code data acquisition software
engineers use to build validation andverification test applications.

Application software that simplifies setup
and configuration of NI PXI hardware

Data transfer APIs for connecting tosystems written in LabVIEW, Python,or C#
Pre-built objects for data display anduser input
Included hosting on SystemLink™
Cloud

ni.comInteractive visualization tools formonitoring tests with drag-and-drop
charts, graphs, and controls
Ability to set alarms that monitor
single channels or groups forunexpected behavior

Customizable layouts for monitoring
multiple instruments at once
Interactively debug in tandem with
code
TDMS file export containing
instrument settings, measurements,
and raw data

Digital Multimeters08Supporting Documentation
Table 3. NI Digital Multimeter Documentation
Document TypeModel

Getting Started Guide

NI Digital Multimeters

Specifications

PXI-4065, PXIe-4080, PXIe-4081, PXIe-4082
USB-4065, PCI-4065, PCIe-4065

Configure a Custom NI System
NI’s online system advisors help you create a custom system based on your specific requirements. Use the advisor to choose compatible
hardware, software, accessories, and services and then save your selections as configurations for easy quoting and purchasing later. Visitni.com/advisor to learn more.

ni.comDigital Multimeters09

What Is PXI?
A Platform Approach to Test and Measurement
Powered by software, PXI is a rugged PC-based platform for measurement and automation systems. PXI combines PCI electrical-bus
features with the modular, Eurocard packaging of CompactPCI and then adds specialized synchronization buses and key software features.
PXI is both a high-performance and low-cost deployment platform for applications such as manufacturing test, military and aerospace,machine monitoring, automotive, and industrial test. Developed in 1997 and launched in 1998, PXI is an open industry standard governed by
the PXI Systems Alliance (PXISA), a group of more than 70 companies chartered to promote the PXI standard, ensure interoperability, andmaintain the PXI specification.

Software

Timing and Synchronization

Test Management and Code Development
Code sequencing, database reporting, user
management, operator interface, parallel
execution, signal processing. LabVIEW,
C/C++, .NET, Python

PXI Chassis
PCI Express Gen 3 throughput up to 24 GB/s
sub-nanosecond latency, P2P streaming,
integrated triggering

Computer

InstrumentationPXI Embedded Controller
Windows and Real-Time OS options, Intel
Xeon processing, peripheral ports, display
output, integrated hard drive

PXI Modules
DC to mmWave, oscilloscope, programmablepower supply, switch/MUX, DMM, VSA, VSG,
VST, AWG, SMU, DAQ

Integrated with the Latest Commercial Technology
By leveraging the latest commercial technology for our products, we can continually deliver high performance and high-quality products toour users at a competitive price. The latest PCI Express Gen 3 switches deliver higher data throughput, the latest Intel multicore processors
facilitate faster and more efficient parallel (multisite) testing, the latest FPGAs from Xilinx help to push signal processing algorithms to theedge to accelerate measurements, and the latest data converters from TI and ADI continually increase the measurement range andperformance of our instrumentation.

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PXI Instrumentation
NI offers more than 600 different PXI modules ranging from DC to mmWave. Because PXI is an open industry standard, nearly 1,500
products are available from more than 70 different instrument vendors. With standard processing and control functions designated to acontroller, PXI instruments need to contain only the actual instrumentation circuitry, which provides effective performance in a small
footprint. Combined with a chassis and controller, PXI systems feature high-throughput data movement using PCI Express bus interfaces andsub-nanosecond synchronization with integrated timing and triggering.

ni.comOscilloscopes
Sample at speeds up to 12.5 GS/s with 5 GHz of
analog bandwidth, featuring numerous triggeringmodes and deep onboard memory

Digital Multimeters
Perform voltage (up to 1000 V), current (up to3A), resistance, inductance, capacitance, andfrequency/period measurements, as well as
diode tests

Digital Instruments
Perform characterization and production test of
semiconductor devices with timing sets and perchannel pin parametric measurement unit
(PPMU)

Waveform Generators
Generate standard functions including sine,
square, triangle, and ramp as well as userdefined, arbitrary waveforms

Frequency Counters
Perform counter timer tasks such as event
counting and encoder position, period, pulse,
and frequency measurements

Source Measure Units
Combine high-precision source and measurecapability with high channel density,
deterministic hardware sequencing, andSourceAdapt transient optimization

Power Supplies & Loads
Supply programmable DC power, with somemodules including isolated channels, output
disconnect functionality, and remote sense

FlexRIO Custom Instruments & Processing
Provide high-performance I/O and powerful
FPGAs for applications that require more thanstandard instruments can offer

Switches (Matrix & MUX)
Feature a variety of relay types and row/column
configurations to simplify wiring in automatedtest systems

Vector Signal Transceivers
Combine a vector signal generator and vector
signal analyzer with FPGA-based, real-time
signal processing and control

GPIB, Serial, & Ethernet
Integrate non-PXI instruments into a PXI systemthrough various instrument control interfaces

Data Acquisition Modules
Provide a mix of analog I/O, digital I/O,
counter/timer, and trigger functionality formeasuring electrical or physical phenomena

Digital Multimeters

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NI Hardware Services
All NI hardware includes a one-year warranty for basic repair coverage and calibration in adherence
to NI specifications prior to shipment. PXI systems also include basic assembly and a functional test.
NI offers additional entitlements to improve uptime and lower maintenance costs with service
programs for hardware. Learn more at ni.com/services/hardware.
HardwareStandard

Premium

Description

Duration at Point of Sale

1 year;included

3 years;
optional

3 years;
optional

NI enhances warranty coverage with additional service
benefits provided with a hardware service program.

Maximum Duration withRenewal< 3 years
with service
program< 3 years< 3 years

NI maintains the high performance and availability of yourhardware for up to three years with a hardware service
program.

•••

NI restores your device’s functionality and includes
firmware updates and factory calibration; < 10 working
days⁴ + standard shipping.

••NI technicians assemble, install software in, and test yoursystem per your custom configuration prior to shipment.

Advanced Replacement ²•

NI stocks replacement hardware that can be shipped
immediately if a repair is needed.

System Return Material
Authorization (RMA)¹•

NI accepts the delivery of fully assembled systems when
performing repair services.

•

NI provides access to support resources for your hardware.

Expedited³

NI performs the requested level of calibration at the
specified calibration interval for the duration of the service
program.

Extended Repair
Coverage
System Configuration,
Assembly, and Test¹

Technical Support•

Calibration Plan
(Optional)•

Standard

1 This option is only available for PXI, CompactRIO, and CompactDAQ systems.
2 This option is not available for all products in all countries. Contact your local NI sales engineer to confirm availability.
3 Expedited calibration is only available for the Traceable calibration level.
4 This applies to non-RF products only. Standard extended repair coverage for RF products is <15 working days + standard shipping.

PremiumPlus Service Program
NI can customize the offerings listed above or offer additional entitlements such as on-site calibration, custom sparing, and lifecycle services
through a PremiumPlus Service Program. Contact your NI sales representative to learn more.

Technical Support
NI hardware service programs and warranty include access to technical support provided by NI support agents during local business hours.
Service requests can be managed online. Additionally, take advantage of NI’s award-winning online resources and communities.

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