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.
NI [ NATIONAL INSTRUMENTS CORPORATION ]
