6-Wire Guard and Current Amplifier
NI PXI-4022
NEW!
• High-speed, high-precision guard and
current amplifier
• Applications
• 6-wire guarded measurements
• Low-current measurements
• Used as an accessory to NI PXI-407x
digital multimeters and M Series
data acquisition devices
• ±200 µV guard accuracy, typical
• 1 ±0.0005% DC gain
Operating Systems
• Windows 2000/NT/XP
• Linux
Recommended Software
• LabVIEW
Driver Software (included)
• NI-DMM
Overview
The National Instruments PXI-4022 guard and current amplifier is a PXI
accessory module consisting of a high-speed, high-precision amplifier
that conditions signals for measurement devices. With the guarding
functionality, you can make 6-wire resistance measurements for resistors
connected in a network, on complex printed circuit board layouts, or
cable test applications. For low-current measurements, the NI PXI-4022
amplifier and high-precision resistors create a feedback current
amplifier. This implementation minimizes burden voltages and converts
current to voltage, so you can measure pA signals with fA noise.
Guard Output
LO
Guard Input+
LO
Guard Inputñ
Blue
Black
+
Red
Black
Red
-
PXI-4022 Guard Mode
Amplifier Output
LO
Bias Voltage
Current
Blue
Black
+
Red
Black
Red
-
100 M
Add Functionality to DMMs
and Data Acquisition Devices
You can use the PXI-4022 with NI PXI-407x digital multimeters (DMMs)
for 6-wire resistance/capacitance measurements or ultralow-current
measurements in a wide variety of applications. You also can use it with
an M Series data acquisition device to form a low-cost, high-resolution
acquisition module for basic in-circuit test needs.
Current
1M
10 k
PXI-4022 Current Amplifier Mode
Software
The PXI-4022 is shipped with NI-DMM driver software, an IVI-compliant
driver that provides numerous example programs and access to the
complete functionality of the PXI-4022 through an easy-to-use
application programming interface (API).
Ordering Information
NI PXI-4022............................................................................779614-01
Includes NI-DMM software.
Low-leakage, low thermal cable set ....................................779410-01
Low-leakage, low thermal connectivity set..........................779499-01
BUY NOW!
For complete product specifications, pricing, and accessory
information, call (800) 813 3693 (U.S.) or go to
ni.com/multimeters.
6-Wire Guard and Current Amplifier
Specifications
Guard Amplifier
Input-output offset.................................................................
Gain .......................................................................................
Slew rate................................................................................
Bandwidth..............................................................................
±200 µV typical; ±500 µV max
1 ±0.0005% at DC
40 V/µS minimum
1 MHz typical minimum
Current Amplifier
Gain Setting V/A
(Range)
10
8
(100 nA)
10
6
(10 µA)
10
4
(1 mA)
1
Recommended
Accuracy
1
23 °C ± 5 °C
0.7% ± 5 pA
0.5% ± 0.5 nA
0.5% ± 50 nA
Usable Sensitivity
2
0.5 pA
50 pA
5 nA
Settling Time
3
100 ms
33 ms
1 ms
Burden Voltage (max)
20 µV
2 mV
200 mV
Tempco/°C
(0 to 55 °C)
0.01% + 0.2 pA
0.005% + 2 pA
0.005% + 200 pA
for laboratory enviornments, 0 to 35 °C up to 60% relative humidity.
2
10 Hz bandwidth
3
10 to 90%, 3 dB bandwidth = 0.5/settling time
Input Characteristics
Input impedance .................................................................... >10
10
Ω
Input bias current................................................................... <5 pA at 23 °C, typical
Output Characteristics
Voltage output range ............................................................. ±12 V max
Output drive current............................................................... ±15 mA max
Overvoltage Protection
Guard Out, Guard In+, Guard In-............................................ 120 VAC, continuous; 100 VDC, continuous; 300 VDC (5 s); 250 VAC (10 s)
Physical
Dimensions ............................................................................ 10 by 16 cm (3.9 by 6.3 in.); single PXI slot, 3U
Environment
Operating temperature ..........................................................
Storage temperature..............................................................
Relative humidity ...................................................................
Pollution degree.....................................................................
Approved at altitudes up to 2000 m
0 to 55 °C
-20 to 70 °C
5 to 85% noncondensing
2
Safety
This product is designed to meet the requirements of the following standards of safety for electrical equipment
for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1
• CAN/CSA C22.2 No. 61010-1
Electromagnetic Compatibility
CE, C-Tick, and FCC Part 15 (Class A) Compliant
Emissions ............................................................................... EN 55011 Class A at 10 m FCC Part 15A above 1 GHz
Immunity ................................................................................ EN 61326:1997 +A2:2001, Table 1
CE Compliance
This product meets the essential requirements of applicable European Directives, as amended for CE Marking, as follows:
Low-Voltage Directive (safety) .............................................. 73/23/EEC
Electromagnetic Compatibility Directive (EMC) .................... 89/336/EEC
BUY ONLINE
at
ni.com
or
CALL (800) 813 3693 (U.S.)
2
NI Services and Support
NI has the services and support to meet
your needs around the globe and through
the application life cycle – from planning
and development through deployment
and ongoing maintenance. We offer
services and service levels to meet
customer requirements in research,
design, validation, and manufacturing.
Visit
ni.com/services.
Local Sales and Technical Support
In offices worldwide, our staff is local to the country, giving you access
to engineers who speak your language. NI delivers industry-leading
technical support through online knowledge bases, our applications
engineers, and access to 14,000 measurement and automation
professionals within NI Developer Exchange forums. Find immediate
answers to your questions at
ni.com/support.
We also offer service programs that provide automatic upgrades to
your application development environment and higher levels of technical
support. Visit
ni.com/ssp.
SERVICE
NEEDS
Training and Certification
NI training is the fastest, most certain route to productivity with our
products. NI training can shorten your learning curve, save development
time, and reduce maintenance costs over the application life cycle. We
schedule instructor-led courses in cities worldwide, or we can hold a
course at your facility. We also offer a professional certification program
that identifies individuals who have high levels of skill and knowledge on
using NI products. Visit
ni.com/training.
Hardware Services
NI Factory Installation Services
NI Factory Installation Services (FIS) is the fastest and easiest way to
use your PXI or PXI/SCXI combination systems right out of the box.
Trained NI technicians install the software and hardware and configure
the system to your specifications. NI extends the standard warranty by
one year on hardware components (controllers, chassis, modules)
purchased with FIS. To use FIS, simply configure your system online with
ni.com/pxiadvisor.
Professional Services
Our Professional Services Team is comprised of NI applications engineers,
NI Consulting Services, and a worldwide National Instruments Alliance
Partner program of more than 600 independent consultants and
integrators. Services range from
start-up assistance to turnkey
system integration.
Visit
ni.com/alliance.
Calibration Services
NI recognizes the need to maintain properly calibrated devices for
high-accuracy measurements. We provide manual calibration
procedures, services to recalibrate your products, and automated
calibration software specifically designed for use by metrology
laboratories. Visit
ni.com/calibration.
OEM Support
We offer design-in consulting and product integration assistance if you
want to use our products for OEM applications. For information about
special pricing and services for OEM customers, visit
ni.com/oem.
Repair and Extended Warranty
NI provides complete repair services for our products. Express repair
and advance replacement services are also available. We offer
extended warranties to help you meet project life-cycle requirements.
Visit
ni.com/services.
ni.com
• (800) 813 3693
National Instruments • info@ni.com
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