National Instruments NI USB-9219 User manual

USER GUIDE AND SPECIFICATIONS
NI USB-9219
4-Channel, 24-Bit, Universal Analog Input Module
This user guide describes how to use the National Instruments USB-9219
and lists the device specifications.
Introduction
The NI USB-9219 provides a USB interface for four channels of universal
analog input with integrated signal conditioning. The NI USB-9219
consists of two components: an NI 9219 module, and an NI USB-9162
carrier, as shown in Figure 1.
Figure 1. NI USB-9219 Components
NI 9219
NI USB-9162
NI USB-9219
Hi-SPeed USB Carrier
NI USB-9162
Hi-Speed USB Carrier
NI USB-9162

NI USB-9219 User Guide and Specifications 2 ni.com
Dimensions
Figure 2 shows the NI USB-9219 device dimensions.
Figure 2. NI USB-9219 Device in Millimeters (Inches)
Safety Guidelines
Operate the NI USB-9219 only as described in these operating instructions.
Hot Surface This icon denotes that the component may be hot. Touching this component
may result in bodily injury.
Safety Guidelines for Hazardous Voltages
If hazardous voltages are connected to the module, take the following
precautions. A hazardous voltage is a voltage greater than 42.4 Vpk or
60 VDC to earth ground.
Caution Ensure that hazardous voltage wiring is performed only by qualified personnel
adhering to local electrical standards.
Caution Do not mix hazardous voltage circuits and human-accessible circuits on the same
module.
Caution Make sure that devices and circuits connected to the module are properly
insulated from human contact.
Hi-Speed USB Carrier
NI USB-9162
120.68 mm
(4.751 in.)
118.26 mm
(4.656 in.)
88.12 mm
(3.469 in.)
25.34 mm
(0.998 in.)

©National Instruments Corporation 3 NI USB-9219 User Guide and Specifications
Caution When module terminals are hazardous voltage LIVE (>42.4 Vpk/60 VDC), you
must ensure that devices and circuits connected to the module are properly insulated from
human contact. You must use the NI 9972 connector backshell kit, as illustrated in Figure 3
to ensure that the terminals are not accessible.
Figure 3. NI 9972 Connector Backshell
Related Documentation
Each application software package and driver includes information about
writing applications for taking measurements and controlling measurement
devices. The following references to documents assume you have
NI-DAQmx 8.7 or later, and where applicable, version 7.1 or later of the
NI application software.
NI-DAQmx for Windows
The DAQ Getting Started Guide describes how to install your NI-DAQmx
for Windows software, your NI-DAQmx-supported DAQ device, and
how to confirm that your device is operating properly. Select Start»
All Programs»National Instruments»NI-DAQ»DAQ Getting Started
Guide.
The NI-DAQ Readme lists which devices are supported by this version of
NI-DAQ. Select Start»All Programs»National Instruments»NI-DAQ»
NI-DAQ Readme.
The NI-DAQmx Help contains general information about measurement
concepts, key NI-DAQmx concepts, and common applications that
are applicable to all programming environments. Select Start»
All Programs»National Instruments»NI-DAQ»NI-DAQmx Help.

NI USB-9219 User Guide and Specifications 4 ni.com
LabVIEW
If you are a new user, use the Getting Started with LabVIEW manual to
familiarize yourself with the LabVIEW graphical programming
environment and the basic LabVIEW features you use to build data
acquisition and instrument control applications. Open the Getting Started
with LabVIEW manual by selecting Start»All Programs»National
Instruments»LabVIEW»LabVIEW Manuals or by navigating to the
labview\manuals directory and opening LV_Getting_Started.pdf.
Use the LabVIEW Help, available by selecting Help»Search the
LabVIEW Help in LabVIEW, to access information about LabVIEW
programming concepts, step-by-step instructions for using LabVIEW, and
reference information about LabVIEW VIs, functions, palettes, menus, and
tools. Refer to the following locations on the Contents tab of the LabVIEW
Help for information about NI-DAQmx:
•Getting Started»Getting Started with DAQ—Includes overview
information and a tutorial to learn how to take an NI-DAQmx
measurement in LabVIEW using the DAQ Assistant.
•VI and Function Reference»Measurement I/O VIs and
Functions—Describes the LabVIEW NI-DAQmx VIs and properties.
•Taking Measurements—Contains the conceptual and how-to
information you need to acquire and analyze measurement data
in LabVIEW, including common measurements, measurement
fundamentals, NI-DAQmx key concepts, and device considerations.
LabWindows/CVI
The Data Acquisition book of the LabWindows/CVI Help contains
measurement concepts for NI-DAQmx. This book also contains Taking an
NI-DAQmx Measurement in LabWindows/CVI, which includes
step-by-step instructions about creating a measurement task using the DAQ
Assistant. In LabWindows™/CVI™, select Help»Contents, then select
Using LabWindows/CVI»Data Acquisition.
The NI-DAQmx Library book of the LabWindows/CVI Help contains
API overviews and function reference for NI-DAQmx. Select Library
Reference»NI-DAQmx Library in the LabWindows/CVI Help.
Measurement Studio
If you program your NI-DAQmx-supported device in Measurement Studio
using Visual C++, Visual C#, or Visual Basic .NET, you can interactively
create channels and tasks by launching the DAQ Assistant from MAX or
from within Visual Studio .NET. You can generate the configuration code
based on your task or channel in Measurement Studio. Refer to the DAQ
Assistant Help for additional information about generating code. You also

©National Instruments Corporation 5 NI USB-9219 User Guide and Specifications
can create channels and tasks, and write your own applications in your
ADE using the NI-DAQmx API.
For help with NI-DAQmx methods and properties, refer to the NI-DAQmx
.NET Class Library or the NI-DAQmx Visual C++ Class Library included
in the NI Measurement Studio Help. For general help with programming in
Measurement Studio, refer to the NI Measurement Studio Help, which is
fully integrated with the Microsoft Visual Studio .NET help. To view
this help file in Visual Studio. NET, select Measurement Studio»
NI Measurement Studio Help.
To create an application in Visual C++, Visual C#, or Visual Basic .NET,
follow these general steps:
1. In Visual Studio .NET, select File»New»Project to launch the New
Project dialog box.
2. Find the Measurement Studio folder for the language you want to
create a program in.
3. Choose a project type. You add DAQ tasks as a part of this step.
ANSI C without NI Application Software
The NI-DAQmx Help contains API overviews and general information
about measurement concepts. Select Start»All Programs»National
Instruments»NI-DAQ»NI-DAQmx Help.
The NI-DAQmx C Reference Help describes the NI-DAQmx Library
functions, which you can use with National Instruments data acquisition
devices to develop instrumentation, acquisition, and control applications.
Select Start»All Programs»National Instruments»NI-DAQ»
NI-DAQmx C Reference Help.
.NET Languages without NI Application Software
With the Microsoft .NET Framework version 1.1 or later, you can use
NI-DAQmx to create applications using Visual C# and Visual Basic .NET
without Measurement Studio. You need Microsoft Visual Studio .NET
2003 or Microsoft Visual Studio 2005 for the API documentation to be
installed.
The installed documentation contains the NI-DAQmx API overview,
measurement tasks and concepts, and function reference. This help is fully
integrated into the Visual Studio .NET documentation. To view the
NI-DAQmx .NET documentation, go to Start»Programs»National
Instruments»NI-DAQ»NI-DAQmx .NET Reference Help. Expand
NI Measurement Studio Help»NI Measurement Studio .NET Class
Library»Reference to view the function reference. Expand
NI Measurement Studio Help»NI Measurement Studio .NET Class

NI USB-9219 User Guide and Specifications 6 ni.com
Library»Using the Measurement Studio .NET Class Libraries to view
conceptual topics for using NI-DAQmx with Visual C# and Visual
Basic .NET.
To get to the same help topics from within Visual Studio, go to Help»
Contents. Select Measurement Studio from the Filtered By drop-down
list and follow the previous instructions.
Device Documentation and Specifications
NI-DAQmx includes the Device Document Browser, which contains
online documentation for supported DAQ, SCXI, and switch devices, such
as help files describing device pinouts, features, and operation, and PDF
files of the printed device documents. You can find, view, and/or print the
documents for each device using the Device Document Browser at any
time by inserting the CD. After installing the Device Document Browser,
device documents are accessible from Start»All Programs»National
Instruments»NI-DAQ»Browse Device Documentation.
Note You can also download these documents at ni.com/manuals.
Training Courses
If you need more help getting started developing an application with
NI products, NI offers training courses. To enroll in a course or obtain
a detailed course outline, refer to ni.com/training.
Technical Support on the Web
For additional support, refer to ni.com/support or zone.ni.com.
Installing the Software
Software support for the NI USB-9219 for Vista/XP/2000 is provided by
NI-DAQmx. The DAQ Getting Started Guide, which you can download at
ni.com/manuals, offers NI-DAQmx users step-by-step instructions for
installing software and hardware, configuring channels and tasks, and
getting started developing an application.
Installing Other Software
If you are using other software, refer to the installation instructions that
accompany your software.

©National Instruments Corporation 7 NI USB-9219 User Guide and Specifications
Example Programs
The NI-DAQmx CD contains example programs that you can use to get
started programming with the NI USB-9219. Refer to the NI-DAQmx for
USB Devices Getting Started Guide that shipped with your device, and
is also accessible from Start»All Programs»National Instruments»
NI-DAQ, for more information.
Installing the NI USB-9219 Device
Before installing the device, you must install the software you plan to use
with the device. Refer to the Installing the Software section of this guide
and the documentation included with the software for more information.
Installing the NI USB-9219 Device into the NI USB-9162 Carrier
The NI USB-9219 module and NI USB-9162 carrier are packaged
separately. Refer to Figure 4, while completing the following assembly
steps:
1. Make sure that no signals are connected to the NI USB-9219 module
and the USB cable is not connected to the device.
2. Remove the protective cover from the 15-pin D-SUB connector.
3. Align the I/O module with the carrier, as shown in Figure 4.
Figure 4. Module Installation
4. Squeeze the latches and insert the NI USB-9219 module into the
NI USB-9162 carrier.

NI USB-9219 User Guide and Specifications 8 ni.com
5. Press firmly on the connector side of the NI USB-9219 module until
the latches lock the module into place, as shown in Figure 5.
Figure 5. Locking Module into Place
6. Connect the USB cable to the assembled NI USB-9219.
Mounting the NI USB-9219 to a Panel
Threaded inserts are located in the NI USB-9219 for mounting it to a panel.
Refer to Figure 6 for dimensions.
Figure 6. Module Dimensions In Millimeters (Inches)
72.2 mm
(2.84 in.)
85.7 mm
(3.37 in.)
76.1 mm
(3.00 in.)
Threaded Insert
M3 x 0.5
8.5 mm (0.34 in.) Max Depth

©National Instruments Corporation 9 NI USB-9219 User Guide and Specifications
Connecting the NI USB-9219 to a Computer
Plug one end of the USB cable into the NI USB-9219 and the other end into
an available USB port on the computer. Refer to the NI-DAQmx for USB
Devices Getting Started Guide that shipped with your device, and is also
accessible from Start»All Programs»National Instruments»NI-DAQ,
for more information.
LED Indicator
The NI USB-9219 device has a green LED next to the USB connector. The
LED indicator indicates device status, as listed in Table 1. When the device
is connected to a USB port, the LED blinks steadily to indicate that the
device is initialized and is receiving power from the connection.
If the LED is not blinking, it may mean that the device is not initialized or
the computer is in standby mode. In order for the device to be recognized,
the device must be connected to a computer that has NI-DAQmx installed
on it. If your device is not blinking, make sure your computer has the latest
version of NI-DAQmx installed on it, and the computer is not in standby
mode.
Table 1. LED State/Device Status
LED State Device Status
Not lit Device not connected or in suspend.
On, not blinking Device connected, but no module installed.
Single-blink Operating normally.
Double-blink Operating normally.
Quadruple-blink Device error. Refer to ni.com/support.

NI USB-9219 User Guide and Specifications 10 ni.com
Wiring the NI USB-9219 Device
Caution A high voltage screw terminal backshell must be installed when using hazardous
voltages (>42.4 Vpk, 60 VDC).
Note Table 2 illustrates the accessories available from ni.com for use with the
NI USB-9219.
The NI USB-9219 has four 6-terminal connectors that provide connections
for four analog input channels. Connect the positive signal of the signal
source to the positive input signal terminal (HI) and the negative signal of
the signal source to the negative input signal terminal (LO). Use the
excitation terminals if your sensor requires a separate excitation
connection. Refer to Table 3 for the signal names and Table 4 for the
terminal assignments for each mode. Refer to the NI USB-9219 Circuitry
section for information about connections in each mode.
Table 2. Accessories
Accessory Accessory Description
NI 9972 Strain relief for 6-position spring terminal
NI 9973 6-position connectors
Table 3. Signal Names
Module Terminal Signal Name Signal Description
1T+ TEDS Data
2T– TEDS COM
3EX+/HI*Positive excitation or input
signal
4HI Positive input signal
5EX–/LO*Negative excitation or input
signal
6LO Negative input signal
*Depending on the mode, terminals 3 and 5 are either the excitation signals or the input signals.
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Ch 0
Ch 1
Ch 2
Ch 3

©National Instruments Corporation 11 NI USB-9219 User Guide and Specifications
Connecting Wires to the NI USB-9219 Connectors
Use a flathead screwdriver with a blade smaller than 2.3 × 1.0 mm (0.09 ×
0.04 in.) to connect wires to the detachable spring-terminal connectors.
Insert the screwdriver into a spring clamp activation slot and press a wire
into the corresponding connector terminal, then remove the screwdriver to
clamp the wire into the terminal. Refer to the Specifications section for
more information about spring-terminal wiring. Refer to Figure 7 for an
illustration of connecting wires to the NI USB-9219.
Figure 7. Connecting Wires to the NI USB-9219 Connectors
Table 4. Terminal Assignments
Mode
Terminal
123456
Vo l t a g e T+ T–—HI LO —
Current T+ T–HI —LO —
4-Wire Resistance T+ T–EX+ HI EX–LO
2-Wire Resistance T+ T–HI —LO —
Thermocouple T+ T–—HI LO —
4-Wire RTD T+ T–EX+ HI EX–LO
3-Wire RTD T+ T–EX+ —EX–LO
Quarter-Bridge T+ T–HI —LO —
Half-Bridge T+ T–EX+ HI EX–—
Full-Bridge T+ T–EX+ HI EX–LO
Digital In T+ T–—HI LO —
Open Contact T+ T–HI —LO —

NI USB-9219 User Guide and Specifications 12 ni.com
Wiring TEDS Channels
The NI USB-9219 supports only Class II TEDS sensors. Connect the two
TEDS lines to
TEDS Data (T+) and TEDS COM (T–) and ensure that
neither T+ nor T– is tied in common to any of the signal inputs (terminals
3 through 6) on the NI USB-9219. Visit ni.com/info and enter the info
code rdteds for information about TEDS sensors.
Grounding and Shielding Considerations
You can connect ground-referenced or floating signal sources to the
NI USB-9219. If you make a floating connection between the signal source
and the NI USB-9219, make sure the voltages on the positive and negative
connections are within the channel-to-earth working voltage range to
ensure proper operation of the NI USB-9219. Refer to the Specifications
section for more information about operating voltages and overvoltage
protection.
Note For best signal quality, National Instruments recommends using shielded cables and
twisted-pair wiring whenever possible.
Figures 8 and 9 illustrate connecting grounded and floating signal sources
to the NI USB-9219 in Voltage mode.
Figure 8. Connecting a Grounded Signal Source to the NI USB-9219
Figure 9. Connecting a Floating Signal Source to the NI USB-9219
+
–
Twisted-Pair
Wiring
V
SIG
Signal Source Shielding
HI
LO
NI USB-9219
+
–
Twisted-Pair
Wiring
VSIG
VSIG Ground
Reference
Signal Source Shielding
HI
LO NI USB- 9219

©National Instruments Corporation 13 NI USB-9219 User Guide and Specifications
NI USB-9219 Timing Options
The NI USB-9219 supports four different timing options that are optimized
for different types of applications by using different ADC conversion
times. High Speed is optimized for high speed at the expense of noise
rejection, Best 60 Hz Rejection is optimized for rejection of 60 Hz noise,
Best 50 Hz Rejection is optimized for rejection of 50 Hz noise, and High
Resolution is optimized for maximum overall noise rejection and provides
good rejection of 50 Hz and 60 Hz noise. Refer to the Specifications section
for more information.
NI USB-9219 Circuitry
The NI USB-9219 is channel-to-channel isolated. Four 24-bit
analog-to-digital converters (ADCs) simultaneously sample all four analog
input channels. An excitation circuit is enabled for all input modes that
require excitation. The ADC and excitation circuits are reconfigured in
each mode to accommodate each type of sensor. Refer to Figure 10 for an
illustration of the input circuitry for one channel of the NI USB-9219.
Figure 10. Input Circuitry for One Channel
Voltage and Current Modes
In Voltage and Current modes, connect the signal source to the
NI USB-9219 across the HI and LO terminals. The current is computed
from the voltage that the ADC measures across an internal shunt resistor.
Refer to Figure 11 for an illustration of the connections.
Figure 11. Connections in Voltage, Current, and Digital In Modes
Isolated
ADC
TEDS
1
2
+
–
CHx 3
6
NI USB-9219
FilterMUX
Current Mode
HI
LO
ADC
IR
SH
NI USB-9219
Voltage/Digital In Modes
HI
LO
ADC
V+
–
NI USB-9219

NI USB-9219 User Guide and Specifications 14 ni.com
4-Wire Resistance and 4-Wire RTD Modes
4-Wire Resistance and 4-Wire RTD modes source a current, which varies
based on the resistance of the load, between the EX+ and EX– terminals.
The measured resistance is computed from the resulting voltage reading.
These modes are not affected by lead wire resistance because a negligible
amount of current flows across the HI and LO terminals due to the high
input impedance of the ADC. Refer to Figure 12 for an illustration of the
connections.
Figure 12. Connections in 4-Wire Resistance and 4-Wire RTD Modes
3-Wire RTD Mode
3-Wire RTD mode sources a current, which varies based on the resistance
of the load, between the EX+ and EX– terminals. This mode compensates
for lead wire resistance in hardware if all the lead wires have the same
resistance. A gain of 2x is applied to the voltage across the negative lead
wire and the ADC uses this voltage as the negative reference to cancel the
resistance error across the positive lead wire. Refer to Figure 13 for an
illustration of the connections.
Figure 13. Connections in 3-Wire RTD Mode
LO
HI
EX–
RTD/
Resistor
Wire
Wire
Wire
I
ADC
I
EX+
Wire
NI USB-9219
LO
EX+
EX–
RTD
Wire
Wire
Wire
I
x2
ADC
I
I
NI USB-9219

©National Instruments Corporation 15 NI USB-9219 User Guide and Specifications
2-Wire Resistance and Quarter-Bridge Modes
In 2-Wire Resistance and Quarter-Bridge modes, connect the two ends of
the resistor or gauge to the NI USB-9219 across the HI and LO terminals.
These modes source a current, which varies based on the resistance of the
load, between the HI and LO terminals. The resulting resistance is
computed from the voltage measurement. 2-Wire Resistance and
Quarter-Bridge modes do not compensate for lead wire resistance. Refer to
Figure 14 for an illustration of the connections.
Figure 14. Connections in 2-Wire Resistance and Quarter-Bridge Modes
Half-Bridge and Full-Bridge Modes
Half-Bridge and Full-Bridge modes use the internal voltage excitation to
set the input range of the ADC and return voltage readings that are
proportional to the excitation level. The internal excitation voltage is
nominally 2.5 V but it varies based on the resistance of the sensor. Refer to
the Specifications section for more information about excitation levels.
In Half-Bridge mode, the HI input is referenced to EX–. In Full-Bridge
mode, the ADC reads the HI and LO inputs differentially. Refer to
Figure 15 for an illustration of the connections.
Figure 15. Connections in Half-Bridge and Full-Bridge Modes
1 The dotted line representsthe portion of the circuit that isconnected only in
Full-Bridge mode.
LO
R
Wire
Wire I
ADC
I
HI
NI USB-9219
HI
LO
EX+
EX– NI USB-9219
R1
R2R3
R4
ADC
Wire
Wire
1

NI USB-9219 User Guide and Specifications 16 ni.com
Thermocouple Mode
In Thermocouple mode, connect the positive end of the thermocouple to
HI and the negative end of the thermocouple to LO. This mode uses the
±125 mV range of the ADC to return a voltage reading. Use shielded
cables and twisted-pair wiring and ground the shielded cables. Each
channel has a built-in thermistor for cold-junction compensation (CJC)
calculations. For improved CJC sensor accuracy, operate the NI USB-9219
in a stable temperature environment and avoid placing heat sources near the
module or its connectors. Refer to the Specifications section for more
information about accuracy. The NI USB-9219 does not support open
thermocouple detection. Refer to Figure 16 for an illustration of the
connections.
Figure 16. Connections in Thermocouple Mode
Excitation Protection
The NI USB-9219 excitation circuit is protected from overcurrent and
overvoltage fault conditions. The circuit is automatically disabled in the
event of a fault condition. Whenever possible, channels automatically
recover after the fault is removed. Refer to the software documentation for
information on how an excitation fault is displayed and handled.
HI
LO
TC ADC
NI USB-9219
+
–

©National Instruments Corporation 17 NI USB-9219 User Guide and Specifications
Specifications
The following specifications are typical for the range 0 to 60 °C unless
otherwise noted.
Input Characteristics
Number of channels ............................... 4 analog input channels
ADC resolution ...................................... 24 bits
Type of ADC.......................................... Delta-sigma (with analog
prefiltering)
Sampling mode ...................................... Simultaneous
Type of TEDS supported ....................... IEEE 1451.4 TEDS Class II
(Interface)
Mode input ranges
Conversion time, no channels in TC mode
High Speed...................................... 10 ms for all channels
Best 60 Hz Rejection ...................... 110 ms for all channels
Best 50 Hz Rejection ...................... 130 ms for all channels
High Resolution .............................. 500 ms for all channels
Conversion time, one or more channels in TC mode
High Speed...................................... 20 ms for all channels
Best 60 Hz Rejection ...................... 120 ms for all channels
Best 50 Hz Rejection ...................... 140 ms for all channels
High Resolution .............................. 510 ms for all channels
Mode Nominal Range(s) Actual Range(s)
Vo l t a g e ±60 V, ±15 V, ±4 V, ±1 V,
±125 mV
± 6 0 V, ± 1 5 V, ± 4 V, ± 1 V,
±125 mV
Current ±25 mA ±25 mA
4-Wire and 2-Wire Resistance 10 kΩ, 1 kΩ10.5 kΩ, 1.05 kΩ
Thermocouple ±125 mV ±125 mV
4-Wire and 3-Wire RTD Pt 1,000, Pt 100 5.05 kΩ, 505 Ω
Quarter-Bridge 350 Ω, 120 Ω390 Ω, 150 Ω
Half-Bridge ±500 mV/V ±500 mV/V
Full-Bridge ±62.5 mV/V, ±7.8 mV/V ±62.5 mV/V, ±7.8125 mV/V

NI USB-9219 User Guide and Specifications 18 ni.com
Overvoltage protection
Terminals 1 and 2 ............................±30 V
Terminals 3 through 6,
across any combination ...................±60 V
Input impedance
Voltage and Digital In modes
(±60 V, ±15 V, ±4 V) ......................1 MΩ
Current mode ...................................< 40 Ω
All other modes ...............................>1 GΩ
Accuracy
Cold-junction compensation
sensor accuracy.......................................±1°C typ
Mode, Range
Gain Error
(% of Reading)†
Offset Error
(ppm of Range)†
Voltage, ±60 V ±0.3, ±0.4 ±20, ±50
Voltage, ±15 V ±0.3, ±0.4 ±60, ±180
Voltage, ±4 V ±0.3, ±0.4 ±240, ±720
Voltage, ±1 V ±0.1, ±0.18 ±15, ±45
Voltage/Thermocouple, ±125 mV ±0.1, ±0.18 ±120, ±360
Current, ±25 mA ±0.1, ±0.6 ±30, ±100
4-Wire and 2-Wire*Resistance, 10 kΩ±0.1, ±0.5 ±120, ±320
4-Wire and 2-Wire*Resistance, 1 kΩ±0.1, ±0.5 ±1,200, ±3,200
4-Wire and 3-Wire RTD, Pt 1,000 ±0.1, ±0.5 ±240, ±640
4-Wire and 3-Wire RTD, Pt 100 ±0.1, ±0.5 ±2,400, ±6,400
Quarter-Bridge, 350 Ω±0.1, ±0.5 ±2,400, ±6,400
Quarter-Bridge, 120 Ω±0.1, ±0.5 ±2,400, ±6,400
Half-Bridge, ±500 mV/V ±0.03, ±0.07 ±300, ±450
Full-Bridge, ±62.5 mV/V ±0.03, ±0.08 ±300, ±1,000
Full-Bridge, ±7.8 mV/V ±0.03, ±0.08 ±2,200, ±8,000
* 2-Wire Resistance mode accuracy depends on the lead wire resistance. This table assumes 0 Ωof lead wire resistance.
† Typ (25 °C, ±5 °C), Max (–40 to 70 °C)

©National Instruments Corporation 19 NI USB-9219 User Guide and Specifications
Stability
Mode, Range
Gain Drift
(ppm of
Reading/°C)
Offset Drift
(ppm of
Range/°C)
Voltage, ±60 V ±20 ±0.2
Voltage, ±15 V ±20 ±0.8
Voltage, ±4 V ±20 ±3.2
Voltage, ±1 V ±10 ±0.2
Voltage/Thermocouple, ±125 mV ±10 ±1.6
Current, ±25 mA ±15 ±0.4
4-Wire and 2-Wire Resistance, 10 kΩ±15 ±3
4-Wire and 2-Wire Resistance, 1 kΩ±15 ±30
4-Wire and 3-Wire RTD, Pt 1,000 ±15 ±6
4-Wire and 3-Wire RTD, Pt 100 ±15 ±60
Quarter-Bridge, 350 Ω±15 ±120
Quarter-Bridge, 120 Ω±15 ±240
Half-Bridge, ±500 mV/V ±3 ±20
Full-Bridge, ±62.5 mV/V ±3 ±20
Full-Bridge, ±7.8 mV/V ±3 ±20

NI USB-9219 User Guide and Specifications 20 ni.com
Input noise in ppm of Rangerms
Input bias current ....................................<1 nA
INL..........................................................±15 ppm
CMRR (fin =60 Hz)................................>100 dB
NMRR
Best 60 Hz Rejection .......................90 dB at 60 Hz
Best 50 Hz Rejection .......................80 dB at 50 Hz
High Resolution...............................65 dB at 50 Hz and 60 Hz
Mode, Range
Conversion Time
High
Speed
Best
60 Hz
Rejection
Best
50 Hz
Rejection
High
Resolution
Voltage, ±60 V 7.6 1.3 1.3 0.5
Voltage, ±15 V 10.8 1.9 1.9 0.7
Voltage, ±4 V 10.8 2.7 2.7 1.3
Voltage, ±1 V 7.6 1.3 1.3 0.5
Voltage/Thermocouple, 125 mV 10.8 1.9 1.9 1.0
Current, ±25 mA 10.8 1.9 1.9 1.0
4-Wire and 2-Wire Resistance, 10 kΩ4.1 1.3 0.8 0.3
4-Wire and 2-Wire Resistance, 1 kΩ7.1 1.8 1.2 0.7
4-Wire and 3-Wire RTD, Pt 1,000 7.6 1.7 1.1 0.4
4-Wire and 3-Wire RTD, Pt 100 10.8 1.9 1.9 0.9
Quarter-Bridge, 350 Ω5.4 1.0 1.0 0.7
Quarter-Bridge, 120 Ω5.4 1.0 1.0 0.7
Half-Bridge, ±500 mV/V 3.8 0.5 0.5 0.2
Full-Bridge, ±62.5 mV/V 5.4 1.0 1.0 0.8
Full-Bridge, ±7.8 mV/V 30 4.7 4.7 2.3