Agilent
U2741A USB Modular 5.5 Digits Digital Multimeter
Data Sheet
2
Features
Makes fast measurements •
with up to 100 readings per
second
Measures up to 300 VDC with •
5.5 digits resolution
Frequency and temperature •
measurement capability
Wide voltage measurement •
range
- DC: 1 μVDC to 300 VDC
- AC: 1 μVrms to 250 Vrms
Wide current measurement •
range
- DC: 1 μADC to 2 ADC
- AC: 1 μArms to 2 Arms
Compatibility with Hi-Speed •
USB 2.0, USBTMC 488.2
standards
Dual-play — standalone and •
modular capability
Bundled software — Agilent •
Measurement Manager
(AMM)
Wide range of compatible •
Agilent Development
Environments (ADEs)
Introduction
The Agilent U2741A is a 5.5 digits digital multimeter (DMM), which is the latest
addition to the Agilent’s USB modular family. It can operate as standalone or as
a modular unit when used with the U2781A USB modular instrument chassis. It
comes with various features and functions to meet your needs today.
U2741A use as standalone device U2741A use as modular device
Figure 1. The U2741A DMM showing dual-play capability
Various U2741A features to meet your demands
Affordable and measures up to ten different measurements•
Quick and easy Hi-Speed USB 2.0 connectivity•
Dual-play capability allowing fl exible confi guration in simple or •
sophisticated test environment
Easy-to-use bundled software to get you started with the DMM without •
programming
Compatible with a wide range of ADEs to choose •
Portable, accurate, and reliable•
Value for money and feature-
rich DMM
The U2741A DMM gives you an
accurate 5.5 digits resolution. It
offers a wide range of measurement
functions and features despite its
value price. The U2741A is capable of
performing DC voltage, AC voltage, DC
current, AC current, 2-wire resistance,
4-wire resistance, continuity,
diode, frequency, and temperature
measurement to meet the industrial
needs.
Quick and easy connectivity
The U2741A allows quick connection
to the PC with Hi-Speed USB 2.0.
The USB interface is also compliant
with USBTMC 488.2 standards. You
can easily connect the device using
USB cable which makes the setup
easy and hassle-free. This simple
and easy-to-use device is ideal for
design validation and educational
teaching labs. Its robust design is
also appropriate for manufacturing
fi eld, use in consumer electronics and
semiconductor.
3
Dual-play capability
The U2741A has a breakthrough
design which gives the users great
fl exibility to use the device as a
standalone or as a modular unit
used in the U2781A USB modular
instrument chassis. You can use this
DMM as standalone for simple test
confi gurations or slot the DMM into
the chassis for more sophisticated
applications systems that requires
connection and triggering of other
modular devices.
Supports IVI-COM, SCPI, and
compatible with wide range of
ADEs
All U2741A purchases are shipped
with the IVI-COM drivers. With the
offered IVI-COM drivers, you are able
to program the U2741A with any
popular ADE that is available in the
market. The U2741A is compatible
with a wide range of ADEs that
allows you to set up your devices in
different programming environment
with minimal effort as they are ready
to be programmed directly using SCPI
commands.
The popular development environment
that is compatible with U2741A is
listed below:
Agilent VEE •
Microsoft® Visual Studio .NET•
C/C++ and Visual Basic®•
LabVIEW•
Easy-to-use bundled software
The Agilent measurement manager (AMM) bundled application software is
simple and easy to use. This software offers a standard user-friendly graphical
user interface (GUI) that allows you to confi gure and control your U2741A
remotely without performing any programming task.
Data logger function with AMM
The AMM software comes with data logger function that allows you to
customize your data logging needs. Data can be stored for analysis when this
option is enabled. The data capture interval range can be set from 0 s to 100 s.
With this feature, you can start the U2741A to take measurement over duration
and check your results when the test is completed. Data can be stored to a CSV
(comma separated value) fi le format.
Figure 2. Example of U2741A AMM GUI
4
Product Outlook and Dimensions
System Requirements
Processor 1.6 GHz Pentium® IV or higher
Operating system Windows® XP Professional or Home Edition (Service
Pack 1 or later) or Windows® 2000 Professional
(Service Pack 4 or later)
Browser Microsoft® Internet Explorer 5.01 or higher
Available RAM 512 MB or higher recommended
Hard-disk space 1 GB
Video Super VGA 800×600
Prerequisites Agilent IO Libraries Suite 14.2 or higher (version 15.0[1]
recommended),
Agilent T&M Toolkit Runtime version 2.1[2],
Agilent T&M Toolkit Redistributable Package 2.1
patch[2],
Microsoft® .NET Framework version 1.1 and 2.0[2]
[1] Available on Agilent Automation-Ready CD.
[2] Bundled with Agilent Measurement Manager application software installer.
Standard Shipped
Accessory
12 V, 2 A AC/DC adapter•
Power cord•
Standard test lead•
USB Standard-A to Mini-B •
interface cable
L-Mount kit (used with the •
modular instrument chassis)
Agilent Automation-Ready CD •
(contains the Agilent IO Libraries
Suite)
Agilent USB Modular Products •
Quick Start Guide
Agilent USB Modular Products •
Reference CD-ROM
Agilent Measurement Manager •
Quick Reference Card
Certifi cate of Calibration
•
Optional Accessory
E2308A thermistor temperature probe
Front View Rear View
Top View
41.00 mm
180.00 mm
117.00 mm
8.60 mm
5
General Characteristics
Remote interface Hi-Spe• ed USB 2.0
USBTM• C 488.2 Class device
Power consumption +12 VDC, 2 A maximum•
Isolated ELV power source•
Operating environment One year specifi cations full accuracy from 18 °C to 28 °C at 50% RH•
Altitude up to 2000 meters•
Pollution degree 2•
For indoor use only•
Storage compliance –• 20 °C to +70 °C
Relative hum• idity at 5% to 90% RH (non-condensing)
Safety compliance Certifi ed with:
IEC 61010-1:2001/EN61010-1:2001 (2nd Edition)•
Canada: CAN/CSA-C22.2 No. 61010-1-04•
USA: ANSI/UL 610• 10-1:2004
Measurement compliance CAT II 300 V Over-voltage Protection
EMC compliance IEC 61326-2002/EN61326:1997+A1:1998+A2:2001+A3:2003•
Canada: ICES-001:2004•
Australia/New Zealand: AS/NZS CISPR11:2004•
Common mode rejection DC CMRR >120 dB with 1k unbalanced load•
AC CMRR >70 dB at 50/60 Hz ±0.1% with 1k unbalanced load•
Normal mode rejection
ratio (NMRR)
>60 dB • at 50/60 Hz ±0.1%[1]
>0 dB at • 50/60 Hz ±0.1%[2]
Shock and vibration Tested to IEC/EN 60068-2
I/O connector Four banana socket terminals
Dimensions (W × D × H) 105.0• 0 mm x 175.00 mm x 11.50 mm (without bumpers)
117.00• mm x 180.00 mm x 41.00 mm (with bumpers)
Weight 451 g (without bumpers)•
509 g (with bumpers)•
Warranty One year
Calibration Calibration interval of one year is highly recommended
[1] Applicable for NPLC >1.
[2] Applicable for NPLC 0.2 and 0.02.
6
Product Specifi cations
DC specifi cations[1]
Function Range Input impedance
Test current /
Burden voltage,
shunt resistance
Accuracy
±(% of reading +
% of range)
Temperature
Coeffi cient
0 °C to 18 ºC
28 °C to 55 °C
Voltage[2] 100.000 mV 10 MΩ– 0.015 + 0.008 0.002 + 0.0008
1.00000 V 10 MΩ– 0.015 + 0.005 0.001 + 0.0005
10.0000 V 10 MΩ– 0.018 + 0.005 0.002 + 0.0005
100.000 V 10 MΩ– 0.018 + 0.005 0.002 + 0.0005
300.000 V 10 MΩ– 0.018 + 0.005 0.002 + 0.0005
Current[3] 10.0000 mA – <0.2 V, 10 Ω0.06 + 0.015 0.005 + 0.0025
100.000 mA – <0.2 V, 1 Ω0.06 + 0.005 0.008 + 0.002
1.0000 A – <0.3 V, 0.1 Ω0.15 + 0.007 0.005 + 0.002
2.0000 A – <0.8 V, 0.1 Ω0.15 + 0.007 0.005 + 0.002
Resistance[4] 100.000 Ω– 1.0 mA 0.03 + 0.008 0.006 + 0.0008
1.00000 kΩ– 1.0 mA 0.03 + 0.005 0.006 + 0.0005
10.0000 kΩ– 100 μA 0.03 + 0.005 0.006 + 0.0005
100.000 kΩ– 10.0 μA 0.03 + 0.005 0.006 + 0.0005
1.00000 MΩ– 1 μA 0.06 + 0.005 0.01 + 0.0005
10.0000 MΩ– 225 nA 0.25 + 0.005 0.025 +0.0005
100.000 MΩ– 225 nA // 10MΩ2.0 + 0.005 0.3 + 0.0005
Diode test[5] 1.0000 V – 1.00 mA 0.015 + 0.03 0.005 + 0.0005
Continuity Test[6] 1.0000 kΩ– 1.00 mA 0.05 + 0.03 0.005 + 0.0005
[1] Specifi cations are based on 30 minutes warm-up time, NPLC 20 resolution, and calibration temperature within 18 °C
to 28 °C. For NPLC 0 and 0.025, add 0.01% of range.
[2] 120% over range on all ranges except 300 VDC. Input protection up to 300 VDC.
[3] Input protected with externally accessible 2 A, 250 V fast blown fuse.
[4] Specifi cations are for 4-wire ohm or 2-wire ohms using null function in AMM software. If without null function in
AMM software, add 0.2 Ω additional error. Input protection up to 300 Vdc. Specifi cations apply for NPLC ≥1.
[5] Specifi cations are for the voltage measured at the input terminals only.
[6] Continuity threshold is fi xed at less than 10 Ω.
DC current settling considerations
Switching current from >1 A to lower current measurement may cause an additional error approximately 0.3% of reading
due to self- heating, and will generally dissipate within a minute.
7
AC specifi cations[1]
AC accuracy for voltage
Function Range
Accuracy input ±(% of reading + % of range)
Frequency (Hz)
20 ~ 45 45 ~ 10k 10k ~ 30k 30k ~ 100k[3]
Voltage[2] 100.000 mVrms 1 + 0.1 0.2 + 0.1 1.5 + 0.3 5.0 + 0.3
1.00000 V 1 + 0.1 0.2 + 0.1 1.0 + 0.1 3.0 + 0.2
10.0000 V 1 + 0.1 0.3 + 0.1 1.0 + 0.1 3.0 + 0.2
100.000 V 1 + 0.1 0.3 + 0.1 1.0 + 0.1 3.0 + 0.2
250.000 V[4] 1 + 0.1 0.3 + 0.1 1.0 + 0.1 3.0 + 0.2
[1] Specifi cations are based on 30 minutes warm-up time and calibration temperature within 18 °C to 28 °C. In manual
range, the settling time is 2.6 seconds while in autorange, the fi rst measurement accuracy is <1% .
[2] Specifi cations are for sine wave inputs more than 5% of range. 120% over range on all ranges except 250 VAC.
Maximum crest factor of 5 at full scale. Input impedance is 1 MΩ in parallel with capacitance less than 120 pF, AC
couple with up to 300 VDC.
[3] Additional error to be added as frequency more than 30 kHz and signal input less than 10% of range. 30 kHz to
100 kHz: add 0.003% of range per kHz.
[4] Input signal has to be more than 50 Vrms.
Temperature coeffi cient for voltage (0 ºC to 18 ºC, 28 ºC to 55 ºC)
Range
Frequency (Hz)
(% of reading + % of range)
20 ~ 45 45 ~ 10k 10k ~ 30k 30k ~ 100k
Temperature
coeffi cient 100.000 mVrms,
1.00000 V,
10.0000 V,
100.000 V,
250.000 V
0.02 + 0.02 0.02 + 0.02 0.05 + 0.02 0.1 + 0.02
AC accuracy for current[1]
Function Range Burden voltage /
Current shunt
Accuracy input (% of reading + % of range)
Frequency (Hz)
20 ~ 45 45 ~ 1k 1k ~ 10k
Current[2] 10.0000 mA <0.2 V, 10 Ω1.5 + 0.1 0.5 + 0.1 2 + 0.2
100.000 mA <0.2 V, 1 Ω1.5 + 0.1 0.5 + 0.1 2 + 0.2
1.00000 A <0.3 V, 0.1 Ω1.5 + 0.1 0.5 + 0.1 2 + 0.2
2.0000 A <0.8 V, 0.1 Ω1.5 + 0.1 0.5 + 0.1 2 + 0.2
[1] In manual range, the settling time is 2.6 seconds while in autorange, the fi rst measurement accuracy is <1%.
[2] Input protected with externally accessible 2 A, 250 V fast blown fuse.
8
Temperature coeffi cient for current (0 ºC to 18 ºC, 28 ºC to 55 ºC)
Range
Frequency (Hz)
(% of reading + % of range)
20 ~ 45 45 ~ 10k 10k ~ 30k
Temperature
coeffi cient 10.0000 mA,
100.000 mA,
1.00000 A,
2.0000 A
0.02 + 0.02 0.02 + 0.02 0.02 + 0.02
Frequency specifi cations[1]
Frequency accuracy
Function Range
Accuracy
(% of reading + % of
range)
Minimum input
frequency
Temperature coeffi cient
(% of range)
Frequency 20 to 300 kHz 0.0200 + 0.003 1 Hz 0.005
Frequency sensitivity for AC voltage
Function Input range
Minimum sensitivity (RMS sine wave)
Frequency (Hz)
20 ~ 100 k 100 ~ 300 k
AC voltage 100 mV[2] 20 mV 20 mV
1 V 100 mV 120 mV
10 V 1 V 1.2 V
100 V 10 V 20 V
250 V 100 V 120 V
[1] Frequency measurement can only be done in auto range mode. Specifi cations are for 30 minutes warm-up time, using
one second aperture. Measuring method is using reciprocal counting technique with AC coupled input at AC voltage
function. Gate time of 0.1 second or 1 second.
[2] Only applicable for square wave measurement.
Temperature specifi cations
Temperature accuracy
Function Thermistor type Range Accuracy Temperature coeffi cient
Temperature 5 kΩ thermistor –80.0 °C to 150 °C
–112 °F to 302 °F Probe accuracy + 0.2 °C 0.002 °C
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Revised: July 17, 2008
Product specifi cations and descriptions
in this document subject to change
without notice.
© Agilent Technologies, Inc. 2008
Printed in USA, Aug 18, 2008
5989-9361EN
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