DT9829

USB Multi-Sensor Measurement Module
Software-Selectable Precision Measurement for Any Sensor

Overview
The DT9829 is a portable data acquisition multi‑sensor
measurement module for USB. Use the DT9829 software
to select from many sensor types and their parameters:
voltage inputs, current, thermocouples, RTDs, thermistors,resistance, bridge-based sensors, and strain gages.

Key Features• Direct connection of many types of sensors –The low-cost DT9828 thermocouple measurement module,
combined with the included QuickDAQ ready-to-measureapplication software, is a powerful temperature data logger.
Accuracy to 0.09° C, low noise, and sampling to 600 S/s allow
high-quality measurement far beyond other products.

software-selectable per channel
oo Thermocouples: B, E, J, K, N, R, S, and T types
oo RTD: Pt100, Pt500, Pt1000 – 2-, 3-, and 4-wireoo Thermistors: 2-, 3-, and 4-wireoo Bridge-based sensors: internal 3.0 VDC
excitation, ±200 mV input range
oo Voltage: ±10 V,±2 V,±200 mV input range
oo Current: ±25 mA
oo Resistance: 0 kΩ to 200 kΩ, 2-, 3, and 4-wireoo 3-wire configurations provide lead wirecompensation• Software-selectable sensor type and parameters toconfigure, record and analyze each channel in 3 easysteps (see page 2)• Each input channel independent – no interactions
between sensors on any channel• Sample rates to 960 S/s• 24-bit sigma-delta ADC eliminates aliasing for
extremely accurate measurements• Thermocouple CJC and open circuit detection• 4 isolated digital inputs and digital outputs• ±500 V galvanic isolation to PC and ground• USB 2.0 powered – no extra power supply needed• Terminal block connections

Precision Measurement for Any Sensor
Any sensor type can be connected to any of 8 screw
terminal inputs and the QuickDAQ application software
allows selection of the sensor. The software andhardware act seamlessly to make all measurements of thesensor without ANY other user interaction.
The result is the ability to measure any sensor on any of 8channels via software selection. All the messy details aretaken care of by the software and the hardware inside
the module. There is no interaction between channels,regardless of the sensor type for any channel.
Accuracies have been meticulously designed to preserve
the integrity of the sensor measurement. For example,
thermocouples have built-in cold junction compensation
circuitry that is positioned right at the connector toprevent air flow or error sources in the connection. An
additional example is the ability to perform 2, 3, or 4 wire
resistor, thermistor or RTD measurements on any channel.
Further, the design includes automatic compensation for
the errors normally incurred from lead wire resistance inthe commonly used 3-wire configuration.

Supported Operating Systems• Windows® 10/8/7/Vista® 32/64-bit
Parameter

Temperature

SensorFeatureAccuracy

Thermocouple

CJC included±0.10 ⁰C (J)RTD (Pt100, 500, 1000)*• 425 µA excitation• 2-, 3-, and 4-wire connections• Callendar Van-Dusen transfer function• Pt100: ±0.11⁰ C (typ• Pt500: ±0.08⁰ C (typ)• Pt1000: ±0.06⁰ C (typ)Thermistor (NTC)
Strain, Weight, Torque, Pressure Load cell, strain gage, generalpurpose bridge

Electrical±0.005⁰ C• Quarter-bridge, Half-bridge, Full-bridge• 120 Ω minimum bridge resistance±0.05% of reading

Voltage±10 V,±2 V, ±200 mV±0.05% of reading

Current±25 mA±0.1% of reading

Resistance• 0 to 4 kΩ or 4 kΩ to 200 kΩ• 2-, 3-, and 4-wire connections±0.01% of reading

Any sensor above can be connected to any input of the DT9829 for precise measurement of its value. All necessary elements
for the sensor are enabled through software selection.
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Configure, Record, and Analyze in 3 Easy Steps
Step 1: Select Device & Configuration

Step 2: Select Sensor Parameter per Channel
Temperature

StrainVoltage

Step 3: Record and Analyze(508) 946-5100

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Block diagram of the DT9829 shows that up to 8 sensors of any type can be connected for precision measurement.
Applications in industry, lab, or field can take advantage of the portable operation running off USB power.

Exploded view – the DT9829 case packages the DT9829 in a CE-compliant enclosure(508) 946-5100

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Every design factor is presented to show the uncompromised, high-integrity performance built into the DT9829.

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Analog Input Channels

The module measures the voltage produced across aconnected resistor when the appropriate current source
is applied to determine resistance. Two-wire, three-wire(with lead wire compensation), and four-wire connection
schemes are supported using the screw terminals on themodule

The DT9829 supports 8 differential analog input channels
that are multiplexed to a single 24-bit Delta-Sigma
A/D converter on the module, providing outstanding
accuracy. Each analog input channel can accept any
one of the following sensor types: voltage, current,thermocouple, RTD, resistance, thermistor, bridge-based
sensors, or strain gage. Channel configuration is done
completely through software, making set-up simple.

Thermistor Measurement
The DT9829 supports Negative Temperature Coefficient(NTC) thermistors with a resistor value of 2252 Ω to100 kΩ at 25 °C. The resistance of NTC thermistors
increases with decreasing temperature. The typical usable
measurement range is -100 °C to 325 °C. The DT9829
module can read a maximum resistance of 200 kΩ.

Voltage Input Support
The DT9829 is versatile enough to support three effective
input ranges for measuring voltage signals: ±10 V, ±2 V,and ±200 mV. Using software, the user specifies a gain of
1, 5, or 50 to achieve a range of ±10 V, ±2 V, or ±200 mV,respectively.

Two-wire, three-wire (with lead wire compensation), andfour-wire connection schemes are supported using thescrew terminals on the module.

Floating and grounded signal sources can be wired toscrew terminals to preserve signal integrity.

Bridge and Strain Gage Measurement

Current Measurement

The DT9829 supports a full range of bridge-based sensors
and strain gages, and provides 3.0 V of bridge excitation
for powering the bridge or strain gage.

Measurement of current output devices up to a rangeof ±25 mA are supported by the DT9829. The hardware
switches in a precision resistor across the terminals of thechannel to measure the current source.

For bridge-based sensors, the DT9829 supports
transducers, such as load cells, as well as generalpurpose quarter-bridge, half-bridge, and full-bridge
configurations.

Thermocouple Measurement

The DT9829 also supports the following strain gageconfigurations:

The DT9829 supports J, K, T, B, E, N, R, and S
thermocouple types. All eight input channels are tied toa single CJC to provide highly-accurate and consistenttemperature measurements.

• Quarter-Bridge, Quarter-Bridge Temp Comp• Half-Bridge Poisson, Half-Bridge Bending• Full-Bridge Bending, Full-Bridge Bending Poisson,

RTD Measurement

Full-Bridge Axial Poisson

The DT9829 module supports Platinum 100 Ω, 500 Ω,and 1000 Ω RTDs. The resistance of the RTD circuit
increases gradually and repeatedly with temperature
in a nonlinear fashion. Measured resistance is thenconverted to temperature using the Callendar Van Dusentransfer function. Using software, the user specifies thecoefficients that are used by this transfer function.

Powerful software included with the module allows
the user to specify the bridge configuration, including
the gage factor, lead wire resistance, Poisson ratio, andnominal gage resistance.

Clocks and Triggers
The DT9829 uses an internal A/D sample clock to paceanalog input operations and a software trigger tostart acquisition. This allows for ultimate flexibility indesigning your system. The module provides a maximum
throughput rate of 960 samples/second.

The module provides 425 µA of excitation for RTD inputs.
Two-wire, three-wire (with lead-wire compensation), andfour-wire connection schemes are supported using screw
terminals on the module.

Resistance Measurement

Isolated Digital I/O

For resistance measurements, the DT9829 module
supports measurement ranges of 0 to 4 kΩ or 4 kΩ to200 kΩ. The module provides a 425 µA current source forthe 0 kΩ to 4 kΩ range and a 10 µA current source for the4 kΩ to 200 kΩ range.

(508) 946-5100

The DT9829 features four, isolated, TTL, 12 V and 24 V
compatible digital input lines and four, isolated, opencollector digital output lines. The DT9829 can readthe value of the digital input port in the analog input
data stream, perfect for synchronizing analog input
measurements with digital events.

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Lead Wire Compensation for 3-Wire
Configurations

The 3-wire configuration also has the potential formeasurement errors due to lead wire resistance.
However, the DT9829 module is designed to compensate
for these errors, making this configuration as accurate asa 4-wire configuration if the connection leads are of thesame length and gauge.

The DT9829 module supports 2-, 3-, and 4-wireconfigurations for RTDs, resistance, and thermistor
measurements. The 4-wire configuration is the mostaccurate because it eliminates potential errors due tolead wire resistance. The 2-wire configuration is typicallythe least accurate because the lead wire resistance may
contribute significant measurement errors, particularly if
the lead connections are long.

The following diagram shows a 3-wire connection for an RTD. The sensed voltage includes the voltage across thesensor as well as the voltage across the top lead wire. Internally, the DT9829 module senses the voltage acrossthe return lead, multiplies the voltage by 2, and subtracts the result from the voltage sensed at CH+ to produce a
corrected measurement for the sensor.

Input connections are easily made via screw terminals for all sensor inputs.

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Combining Analog and Digital Input Data In One Stream
The following diagram shows the timing for a channel gain list consisting of 5 analog input channels and thedigital input port. Note that the digital input port may be read as a single-value operation or as part of the analog
input stream, as it is in this example. With the module set to the maximum aggregate sample rate of 960 samples/
second, the resulting per channel sample rate is 160 samples/second.
Aggregate Sample Rate = 960 S/s
Aggregate Sample Rate
# of Channels=960 S/s= 160 S/s

6=tsample =11Aggregate Sample Ratetchannel

1== 960 S/s = 1.04 ms
1Sample Rate per Channel = 160 S/s = 6.25 ms• FFT Analysis Option (License Required)

QuickDAQ

oo Includes all the features of the QuickDAQ Base

QuickDAQ allows you to acquire and display from all
Data Translation USB and Ethernet data acquisition
devices that support analog input streaming. Combine
QuickDAQ with Data Translation hardware to acquiredata, record data to disk, display the results in both aplot and digital display, and read a recorded data file.
Be productive right out of the box with this powerfuldata logging software. Data can be exported to otherapplications like Microsoft Excel® and The Mathworks
MATLAB® for more advanced analysis. Two additional
options can be purchased to add FFT analysis capabilities
to the base package.

Packageoo Perform single-channel FFT operations including:◊ Auto Spectrum◊ Spectrum◊ Power Spectral Density
oo Configure and view dynamic performancestatistics
oo Supports Hanning, Hamming, Bartlett, Blackman,Blackman Harris, and Flat Top response windows• Advanced FFT Analysis Option (License Required)oo Includes all the features of the QuickDAQ BasePackage and FFT Analysis Package
oo Perform 2-channel FFT operations including:◊ FRF◊ Cross-Spectrum◊ Cross Power Spectral Density◊ Coherence◊ Coherent Output Poweroo Supports real, imaginary, and Nyquist display

Key Features• QuickDAQ Base Package (Free)
oo Ready-to-measure application software
oo Configure, acquire, log, display, and analyze yourdata
oo Customize many aspects of the acquisition,

display, and recording functions to suit yourneeds

functionsoo Additional FFT analysis functions supported:

Exponential, Force, Cosiner Taperoo Save data to .uff file format(508) 946-5100

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Ordering Summary
HARDWARE• DT9829 — 8-channel USB module, withenclosure
ACCESSORIES• DIN RAIL Kit
FREE SOFTWARE• QuickDAQ• DAQ Adaptor for MATLAB — Access theanalysis and visualization tools of MATLAB®.
• LV-Link — Access the power of Data
Translation boards through LabVIEW™.

QuickDAQ ships free-of-charge and allows you to get up and running quickly.

OPTIONAL SOFTWARE• QuickDAQ FFT Analysis Option (LicenseRequired)• QuickDAQ Advanced FFT Analysis Option(License Required)

Other Software Options
There are many software choices available for application development,from ready-to-measure applications to programming environments.
The following software is available for use with the DT9824 module and isprovided on the Data Acquisition Omni CD:• DT9829 Device Driver –The device driver allows you to use a DT9824
module with any of the supported software packages or utilities.

• DT9829 Calibration Utility – This utility allows you to calibrate featuresof a DT9829 module.

• Quick DataAcq application – The Quick DataAcq application provides
a quick way to get up and running. Using this application, verify key
features of the module, display data on the screen, and save data todisk.
• DT-Open Layers® for .NET Class Library – Use this class library if you
want to use Visual C#® or Visual Basic® for .NET to develop application
software using Visual Studio® 2003-2012; the class library complies
with the DT-Open Layers standard.
• DataAcq SDK – Use the DataAcq SDK to use Visual Studio 6.0 andMicrosoft® C or C++ to develop application software using Windows
10/8/7/Vista/XP 32/64-bit; the DataAcq SDK complies with the DTOpen Layers standard.
• DAQ Adaptor for MATLAB – Data Translation’s DAQ Adaptor provides
an interface between the MATLAB® Data Acquisition (DAQ) toolbox
from The MathWorks™ and Data Translation’s DT-Open Layers
architecture.
• LV-Link – Data Translation’s LV-Link is a library of VIs that enable
LabVIEW™ programmers to access the data acquisition features of DTOpen Layers compliant USB and PCI devices.

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DT9829-Datasheet		

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mccdaq.comJune 2017. Rev 5© Measurement Computing Corporation