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Data Translation DT9824 User Manual

Ultra-high resolution precision instrumentation input usb data acquisition module
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UM-23782-G
DT9824
User's Manual

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Summary of Contents for Data Translation DT9824

  • Page 1 Title Page UM-23782-G DT9824 User’s Manual...
  • Page 2 Information furnished by Data Translation, Inc. is believed to be accurate and reliable; however, no responsibility is assumed by Data Translation, Inc. for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
  • Page 3 Changes or modifications to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules.
  • Page 5 Table of Contents Table of Contents About this Manual ............9 Intended Audience.
  • Page 6 Contents Chapter 5: Principles of Operation ........47 Analog Input Features .
  • Page 7 Contents Chapter 7: Calibration ..........69 Overview .
  • Page 8 Contents...

  • Page 9: About This Manual

    About this Manual This manual describes how to install and set up your DT9824 module and device driver, and verify that your module is working properly. This manual also describes the features of the DT9824 module, the capabilities of the device driver, and how to program the DT9824 module using the DT-Open Layers for .NET Class...

  • Page 10: Conventions Used In This Manual

    Refer to the following documents for more information on using the DT9824 module: • Benefits of the Universal Serial Bus for Data Acquisition. This white paper describes why USB is an attractive alternative for data acquisition. It is available on the Data Translation web site (www.datatranslation.com).

  • Page 11: Where To Get Help

    About this Manual Where To Get Help Should you run into problems installing or using a DT9824 module, the Data Translation Technical Support Department is available to provide technical assistance. Refer to Chapter 8 starting on page 75 for more information. If you are outside the United States or Canada, call your local distributor, whose number is listed on Data Translation’s web site...
  • Page 12 About this Manual...

  • Page 13: Chapter 1: Overview

    Overview Features ..............Supported Software .

  • Page 14: Features

    The DT9824 module resides outside of the PC and install with a single cable to ease installation. Modules can be “hot swapped,” or plugged and unplugged while the PC is on, making them useful for many data acquisition applications.
  • Page 15 Overview • 8 opto-isolated digital input lines • 8 opto-isolated digital output lines; the outputs are solid-state relays that operate from ±30 V at currents up to 400 mA (peak) AC or DC • Digital I/O galvanically isolated to 250 V when using all digital input lines •...

  • Page 16: Supported Software

    • DT9824 Device Driver – This software is provided on the Data Acquisition OMNI CD that is shipped with the module. The device driver allows you to use a DT9824 module with any of the supported software packages or utilities.

  • Page 17: Accessories

    Overview Accessories Table 1 lists the optional accessories are available for the DT9824. Table 1: Optional Accessories Available for the DT9824 Accessory Description STP37 The STP37 permits easy screw terminal connections for accessing the digital I/O signals on a DT9824 module.

  • Page 18: Getting Started Procedure

    Figure 2 illustrates the steps needed to get started using the DT9824 module. This diagram is repeated in each getting started chapter; the shaded area in the diagram shows you where you are in the getting started procedure. Install the Module...

  • Page 19: Part 1: Getting Started

    Part 1: Getting Started...

  • Page 21: Chapter 2: Installing The Module

    Installing the Module Unpacking ..............Attaching Modules to the Computer.
  • Page 22 Chapter 2 Install the Module and Configure the Device Driver (this chapter) Wire Signals (see Chapter 3 starting on page Verify the Operation of the Module (see Chapter 4 starting on page...

  • Page 23: Unpacking

    • EP365 USB cable • Data Acquisition OMNI CD-ROM If an item is missing or damaged, contact Data Translation. If you are in the United States, call the Customer Service Department at (508) 481-3700, ext. 1323. An application engineer will guide you through the appropriate steps for replacing missing or damaged items.

  • Page 24: Attaching Modules To The Computer

    To connect a DT9824 module directly to a USB port of the computer, do the following: 1. Attach one end of the EP365 cable, which is shipped with the DT9824 module, to the USB port on the module. 2. Attach the other end of the EP365 cable to one of the USB ports on the host computer, as...

  • Page 25: Connecting To A Self-Powered Usb Hub

    1.1 port. To connect a DT9824 module to a self-powered USB hub, do the following: 1. Attach one end of the EP365 cable to the DT9824 module and the other end of the EP365 cable to a self-powered USB hub.
  • Page 26 DT9824 Module EP365 Cables Figure 4: Attaching DT9824 Modules to the Host Computer Using Self-Powered USB Hubs Note: You can unplug a module, and then plug it in again, if you wish, without causing damage. This process is called hot-swapping.

  • Page 27: Configuring The Driver

    Windows 7 and Vista (64-bit) C:\Windows\SysWOW64\Dtolcpl.cpl To configure the DT9824 device driver, do the following: 1. If you have not already done so, power up the host computer and all peripherals. 2. From the Control Panel, double-click the Open Layers Data Acquisition Control Panel icon.
  • Page 28 Chapter 2...

  • Page 29: Chapter 3: Wiring Signals

    Wiring Signals Preparing to Wire Signals ............Connecting Analog Input Signals .
  • Page 30 Chapter 3 Install the Module (see Chapter 2 starting on page Wire Signals (this page) Verify the Operation of the Module (see Chapter 4 starting on page...

  • Page 31: Preparing To Wire Signals

    6, has a 37-pin digital I/O connector for attaching 8 opto-isolated digital input signals and 8 opto-isolated digital output signals. Analog Input Channels Figure 5: Analog Input Connectors of the DT9824 (Front Panel) Digital I/O Connector Figure 6: Digital I/O Connector of the DT9824 (Rear Panel)
  • Page 32 • Separate power and signal lines by using physically different wiring paths or conduits. • To avoid noise, do not locate the DT9824 module and cabling next to sources that produce high electromagnetic fields, such as large electric motors, power lines, solenoids, and electric arcs, unless the signals are enclosed in a mumetal shield.

  • Page 33: Connecting Analog Input Signals

    Wiring Signals Connecting Analog Input Signals You can connect analog input signals to the DT9824 module in the differential configuration only. Figure 7 shows the numbering of the screw terminal blocks for analog input connections. – Connect Figure 7: Screw Terminal Block Numbering for Analog Input Connections Figure 8 shows how to connect voltage inputs to the DT9824.

  • Page 34: Connecting Digital I/O Signals

    Connecting Digital I/O Signals To make digital I/O connections easier, you can use the optional STP37 screw terminal panel and EP333 cable with your DT9824 module. Connect the STP37 to the digital I/O connector of the module as shown in...

  • Page 35: Connecting Digital Input Signals

    Figure 10: STP37 Screw Terminal Panel Connecting Digital Input Signals Figure 11 shows how to connect digital input signals (lines 0 and 1, in this case) to the digital I/O connector on the DT9824 module. +5 V* DT9824 Digital I/O Connector 1 kΩ*...

  • Page 36: Connecting Digital Output Signals

    Chapter 3 Connecting Digital Output Signals The digital output lines on a DT9824 module act as solid-state relays. The customer-supplied signal can be ±30 V at up to 400 mA (peak) AC or DC. You can use the digital output lines of the module to control solid-state or mechanical relays or high-current electric motors.
  • Page 37 Verifying the Operation of the Module Running the Quick DataAcq Application......... Testing Single-Value Analog Input .
  • Page 38 Verify the Operation of the Module (this chapter) You can verify the operation of a DT9824 module using the Quick DataAcq application. The Quick DataAcq application allows you to do the following: • Acquire data from a single analog input channel or digital input port •...

  • Page 39: Chapter 4: Verifying The Operation Of The Module

    For information on each of the features provided, use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu. If the system has trouble finding the help file, navigate to C:\Program Files\Data Translation\Win32\ dtdataacq.hlp, where C: is the letter of your hard disk drive.

  • Page 40: Testing Single-Value Analog Input

    2. In the Quick DataAcq application, choose Single Analog Input from the Acquisition menu. 3. Select the appropriate DT9824 module from the Board list box. Note: Once you select the module, the LED on the module turns green. 4. In the Channel list box, select an index of 0 to select analog input channel 1.

  • Page 41: Testing Continuous Analog Input

    To verify that the module can perform a continuous analog input operation, do the following: 1. Connect known voltage sources, such as the outputs of a function generator, to analog input channels 1 and 2 on the DT9824 module (using the differential configuration). Refer page 33 for more information on connecting analog input signals.

  • Page 42: Testing Single-Value Digital Input

    Testing Single-Value Digital Input To verify that the module can read a single digital input value, do the following: 1. Connect a digital input to digital input line 0 of port A on the DT9824 module. Refer to page 35 for more information on connecting digital inputs.

  • Page 43: Testing Single-Value Digital Output

    To verify that the module can output a single digital output value, perform the following steps: 1. Connect a digital output to digital output line 0 of port B on the DT9824 module. Refer to page 36 for more information on connecting digital outputs.
  • Page 44 Chapter 4...

  • Page 45: Part 2: Using Your Module

    Part 2: Using Your Module...
  • Page 46 Chapter...

  • Page 47: Chapter 5: Principles Of Operation

    Principles of Operation Analog Input Features ............Digital I/O Features.
  • Page 48 Chapter 5 Figure 13 shows a block diagram of the DT9824 module. Figure 13: Block Diagram of the DT9824 Module...

  • Page 49: Analog Input Features

    The DT9824 module can acquire data from a single analog input channel or from a group of analog input channels. In hardware analog input channels are numbered 1 to 4; in software, the index of a channel is zero-based.

  • Page 50: Specifying The Digital Input Port In The Analog Input Channel List

    Specifying the Digital Input Port in the Analog Input Channel List Using the DT9824 module, you can also read the digital input port (all 8 digital input lines) in the analog input stream by specifying a channel index of 4 the channel-gain list. This feature is particularly useful when you want to correlate the timing of analog and digital events.

  • Page 51: Triggers

    A/D sample clock. DT9824 modules use an 8 kSample input FIFO for storing data from each of up to 5 enabled input channels (analog input indices 0 to 3, and the digital input port, index 4).

  • Page 52: Data Format

    Figure 14: Continuous Wrap Mode Data Format The DT9824 module uses offset binary data encoding for the ±10 V bipolar range. Note: When the DT9824 is above range, the value FFFFFFh (plus full-scale) is returned. When the DT9824 module is below range, the value 000000h (minus full-scale) is returned.

  • Page 53: Data Transfer

    The data is gap-free. Error Conditions The DT9824 module can report an A/D overrun error if the A/D sample clock rate is too fast. The error occurs if a new A/D sample clock pulse occurs while the ADC is busy performing a conversion from the previous A/D sample clock pulse.

  • Page 54: Digital I/O Features

    Chapter 5 Digital I/O Features The DT9824 module provides 8 digital input lines and 8 digital output lines that you can use to control external equipment, including solid-state or mechanical relays. This section describes the following digital I/O features of the DT9824 modules: •...

  • Page 55: Operation Modes

    (one channel can be +250 V while the adjacent channel can be –250 V). Resolution The DT9824 module provides a resolution of eight bits for the digital input port to accommodate the eight isolated digital input lines and a resolution of eight bits for the digital output port to accommodate the eight isolated digital output lines.
  • Page 56 Chapter 5...

  • Page 57: Chapter 6: Supported Device Driver Capabilities

    Supported Device Driver Capabilities Data Flow and Operation Options..........Buffering .
  • Page 58 The tables in this chapter summarize the features available for use with the DT-Open Layers for .NET Class Library and the DT9824 module. The DT-Open Layers for .NET Class Library provides properties that return support information for specified subsystem capabilities.

  • Page 59: Data Flow And Operation Options

    Supported Device Driver Capabilities Data Flow and Operation Options Table 4: Data Flow and Operation Options DT9824 DOUT TACH QUAD Single-Value Operation Support SupportsSingleValue Simultaneous Single-Value Output Operations SupportsSetSingleValues Continuous Operation Support SupportsContinuous Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before & after Trigger...

  • Page 60: Buffering

    MaxRetriggerFreq Minimum Retrigger Frequency MinRetriggerFreq Data Encoding Table 7: Data Encoding Options DT9824 DOUT TACH QUAD Binary Encoding Support SupportsBinaryEncoding Twos Complement Support SupportsTwosCompEncoding Returns Floating-Point Values ReturnsFloats a. The DT9824 uses offset binary encoding for the ±10 V range.

  • Page 61: Channels

    Supported Device Driver Capabilities Channels Table 8: Channel Options DT9824 DOUT TACH QUAD Number of Channels NumberOfChannels SE Support SupportsSingleEnded SE Channels MaxSingleEndedChannels DI Support SupportsDifferential DI Channels MaxDifferentialChannels Maximum Channel-Gain List Depth CGLDepth Simultaneous Sample-and-Hold Support SupportsSimultaneousSampleHold Channel-List Inhibit SupportsChannelListInhibit a.

  • Page 62: Ranges

    Table 10: Range Options DT9824 DOUT TACH QUAD Number of Voltage Ranges NumberOfRanges Available Ranges SupportedVoltageRanges ±10 V Current Output Support SupportsCurrentOutput Resolution Table 11: DT9824 Resolution Options DT9824 DOUT TACH QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions Available Resolutions SupportedResolutions...

  • Page 63: Thermocouple And Rtd Support

    Supported Device Driver Capabilities Thermocouple and RTD Support Table 12: Thermocouple and RTD Support Options DT9824 DOUT TACH QUAD Thermocouple Support SupportsThermocouple RTD Support SupportsRTD Resistance Support ReturnsOhms Voltage Converted to Temperature in Hardware SupportsTemperatureDataInStream Supported Thermocouple Types ThermocoupleType Supported RTD Types...

  • Page 64: Strain Gage Support

    Chapter 6 Strain Gage Support Table 14: Strain Gage Support Options DT9824 DOUT TACH QUAD Strain Gage Support SupportsStrainGage External Excitation Voltage SupportsExternalExcitationVoltage Internal Excitation Voltage SupportsInternalExcitationVoltage Shunt Calibration SupportsShuntCalibration Voltage Excitation Per Channel SupportedPerChannelVoltageExcitation Minimum Excitation Voltage MinExcitationVoltage Maximum Excitation Voltage...

  • Page 65: Reference Triggers

    Supported Device Driver Capabilities Reference Triggers Table 16: Reference Trigger Options DT9824 DOUT TACH QUAD External Positive TTL Trigger Support SupportsPosExternalTTLTrigger External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Negative Threshold Trigger Support SupportsNegThresholdTrigger Digital Event Trigger Support...

  • Page 66: Counter/Timers

    Chapter 6 Counter/Timers Table 18: Counter/Timer Options DT9824 DOUT TACH QUAD Cascading Support SupportsCascading Event Count Mode Support SupportsCount Generate Rate Mode Support SupportsRateGenerate One-Shot Mode Support SupportsOneShot Repetitive One-Shot Mode Support SupportsOneShotRepeat Up/Down Counting Mode Support SupportsUpDown Edge-to-Edge Measurement Mode Support...

  • Page 67: Tachometers

    Supported Device Driver Capabilities Tachometers Table 19: Tachometer Options DT9824 DOUT TACH QUAD Tachometer Falling Edges SupportsFallingEdge Tachometer Rising Edges SupportsRisingEdge Tachometer Stale Data Flag SupportsStaleDataFlag...
  • Page 68 Chapter 6...

  • Page 69: Chapter 7: Calibration

    Calibration Overview ..............Using the Auto-Calibration Procedure .

  • Page 70: Overview

    Chapter 7 Overview DT9824 modules are calibrated at the factory and should not require calibration for initial use. We recommend that you check and, if necessary, readjust the calibration of the analog input circuitry on the DT9824 modules every six months using the DT9824 Calibration Utility, described in this chapter.

  • Page 71: Using The Auto-Calibration Procedure

    Calibration Using the Auto-Calibration Procedure Note: Ensure that you let the DT9824 module warm-up for a minimum of 1 hour before calibrating it. Auto-calibration is the easiest to use and is the recommended calibration method. To auto-calibrate the analog input subsystem, do the following: 1.

  • Page 72: Using The Manual Calibration Procedure

    Chapter 7 Using the Manual Calibration Procedure Note: Ensure that you let the DT9824 module warm-up for a minimum of 1 hour before calibrating it. If you want to manually calibrate the analog input circuitry instead of auto-calibrating it, perform the following steps: 1.
  • Page 73 Calibration d. Once the Running Average value has settled, adjust the gain by entering values in the Gain edit box, or by clicking the up/down buttons until the Running Average value matches the value you applied. e. Repeat steps 4a to 4d, selecting the next gain in the list, until the gain values are calibrated for each gain setting.
  • Page 74 Chapter 7...

  • Page 75: Troubleshooting

    Troubleshooting General Checklist ............. Technical Support .

  • Page 76: General Checklist

    5. Check that you have installed and configured the device driver properly using the instructions in Chapter 6. Search the DT Knowledgebase in the Support section of the Data Translation web site (at www.datatranslation.com) for an answer to your problem. If you still experience problems, try using the information in...
  • Page 77 Microsoft bus driver or a problem with the bus driver exists. The DT9824 module was Ensure that your DT9824 module is properly removed while an operation connected. was being performed. Data appears to be An open connection exists.

  • Page 78: Technical Support

    Chapter 8 Technical Support If you have difficulty using the DT9824 module, Data Translation’s Technical Support Department is available to provide technical assistance. To request technical support, to go our web site at http://www.datatranslation.com and click on the Support link.

  • Page 79: If Your Module Needs Factory Service

    Troubleshooting If Your Module Needs Factory Service If your module must be returned to Data Translation, do the following: 1. Record the module’s serial number, and then contact the Customer Service Department at (508) 481-3700, ext. 1323 (if you are in the USA) and obtain a Return Material Authorization (RMA).
  • Page 80 Chapter 8...

  • Page 81: Specifications

    Specifications Analog Input Specifications ........... . Digital I/O Specifications .

  • Page 82: Analog Input Specifications

    Appendix A Analog Input Specifications Table 22 lists the specifications for the A/D subsystem on the DT9824 module. Table 22: A/D Subsystem Specifications Feature DT9824 Specifications Number of analog inputs 4 Differential Number of gains 4 (1, 8, 16, 32)
  • Page 83 Specifications Table 22: A/D Subsystem Specifications (cont.) Feature DT9824 Specifications Offset drift versus temperature ≤ 600Hz: 50 nV/°C > 600Hz: 150 nV/°C Offset drift versus time 25 nV/1000 hours typical Gain drift versus temperature ±10 ppm/°C Gain drift versus time...

  • Page 84: Noise

    Figure 17: Maximum Noise Measurement During Typical Usage at 10 Hz with a Gain of 1 Figure 23 shows the typical RMS noise, in microvolts, of the DT9824 at sampling rates of 10 Samples/s, 100 Samples/s, 960 Samples/s, and 4800 Samples/s and gains of 1, 8, 16, and...

  • Page 85: Frequency Response And Input Bandwidth

    Figure 18: System Noise Specification Frequency Response and Input Bandwidth Each channel of the DT9824 includes a dedicated 24-bit Sigma-Delta A/D converter. The ultra-low noise and accuracy of these converters is achieved using an oversampling Sigma-Delta modulator followed by a multi-order Sinc filter and a digital low-pass filter/decimator.
  • Page 86 Figure 19: Frequency Response of the DT9824 When Using a Sampling Rate of 4800 Samples/s As you can see, the frequency response of the DT9824 gently rolls off from DC due to the filtering of the Sigma-Delta A/D converter. You can use software to apply a correction factor to the acquired data to compensate for the filter response of the A/D converter.
  • Page 87 Specifications Table 25: Gain Correction Factors Sampling Rate of the DT9824 Frequency of the Input 1600 4800 Signal (Hz) Samples/s Samples/s Samples/s Samples/s Samples/s Samples/s Samples/s Samples/s 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.257 1.035 1.006 1.002 1.000 1.000...

  • Page 88: Digital I/O Specifications

    Appendix A Digital I/O Specifications Table 26 lists the specifications for the digital input (DIN) and digital output (DOUT) subsystems on the DT9824 module. Table 26: Digital I/O Specifications Feature DT9824 Specifications Number of digital I/O lines 16 (8 Isolated Inputs,...

  • Page 89: Power, Physical, And Environmental Specifications

    Specifications Power, Physical, and Environmental Specifications Table 27 lists the power, physical, and environmental specifications for the DT9824 module. Table 27: Power, Physical, and Environmental Specifications Feature DT9824 Specifications Power μ +5 V Standby: A maximum +5 V Enumeration: 100 mA maximum (75 mA typical)

  • Page 90: Regulatory Specifications

    Appendix A Regulatory Specifications The DT9824 module is CE-compliant. Table 28 lists the regulatory specifications for the DT9824 module. Table 28: Regulatory Specifications Feature Specifications Emissions (EMI) FCC Part 15, Class A EN55011:2007 (Based on CISPR-11, 2003/A2, 2006) Immunity EN61326-1:2006...

  • Page 91: Connector Specifications

    Specifications Connector Specifications Table 29 lists the cable and connector specifications for the DT9824 module. Table 29: DT9824 Cable and Connector Specifications Feature DT9824 Specifications USB cable 2-meter, Type A-B, USB cable Data Translation part#17394 or AMP part# 974327-1 4-position Screw terminal block...
  • Page 92 Appendix A...
  • Page 93 Connector Pin Assignments and LED Status Indicators Analog Input Screw Terminals ..........Digital I/O Connector .

  • Page 94: Analog Input Screw Terminals

    Appendix B Analog Input Screw Terminals Figure 20 shows the terminal blocks for each analog input channel on the DT9824 module. Figure 20: Screw Terminals of the Analog Input Channels Table 30 summarizes the screw terminal assignments. Table 30: Screw Terminal Assignments for the Analog Input Channels...

  • Page 95: Digital I/O Connector

    Connector Pin Assignments and LED Status Indicators Digital I/O Connector Figure 21 shows the pin locations of the digital I/O connector on the DT9824 module. Figure 21: Digital I/O Connector Table 31 lists the pin assignments of the digital I/O connector.

  • Page 96: Usb Connector

    Appendix B USB Connector Figure 22 shows the pin locations of the USB connector on the DT9824 module. Figure 22: USB Connector Table 32 lists the pin assignments of the digital I/O connector. Table 32: USB Connector Pin Assignments Signal Description...

  • Page 97: Led Status Indicators

    Connector Pin Assignments and LED Status Indicators LED Status Indicators Each DT9824 module has a single bi-color LED that indicates the status of the module, as described in Table Table 33: LED Status Indicators on the DT9824 Module Color of the LED...
  • Page 98 Appendix B...

  • Page 99: Index

    Index Index calibration CGLDepth A/D sample clock channel list A/D subsystem, specifications for analog input channels A/D trigger for digital input port accessories channel type administrator privileges differential analog input features single-ended A/D sample clock channel-gain list depth adding a digital input port to the channel list channels channel list analog input...
  • Page 100 DT9824 Calibration Utility input configuration DT9824 Device Driver input FIFO DT-Open Layers for .NET Class Library FIFO, input DTx-EZ input ranges internal clock...
  • Page 101 Index module specifications resolution multiple channels, analog input analog input available number of retrigger clock frequency no wrap mode returning modules to the factory number of differential channels running the Quick DataAcq application gains I/O channels resolutions scans per trigger scan single-ended channels screw terminal assignments...
  • Page 102 Index SupportsSimultaneousStart Visual C# SupportsSingleEnded Visual C++ SupportsSingleValue SupportsSoftwareTrigger technical support throughput maximum minimum transferring data triggered scan number of scans per trigger retrigger frequency triggers external external negative digital external positive digital software troubleshooting procedure service and support procedure troubleshooting table TTL trigger unpacking...

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