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Principles of Operation

61

The channels are read in order from the first entry to the last entry in the channel list. Refer to

for more information on the supported conversion modes.

Cold Junction Compensation

One cold-junction compensation (CJC) circuit is provided for all thermocouple input channels.
The software reads the value of the CJC input and applies it to the value of the thermocouple
input to correct for errors based on the specified thermocouple type.

The conversion time for the CJC circuitry is 240 ms, typical. The software takes care of
correlating the CJC measurements with the analog input measurements.

Note:

When using the DT-Open Layers for .NET Class Library, the software provides the

option of returning CJC values in the data stream. This option is seldom used, but is provided
if you want to implement your own temperature conversion algorithms in software when
using continuous operations. Refer to

for more information on this feature.

Open Thermocouple Detection

A 10 M

Ω

pull-up resistor is provided on the high side input of each differential thermocouple

channel for open thermocouple detection. When an open thermocouple is detected, a positive,
full-scale input voltage is returned.

The software returns the value SENSOR_IS_OPEN (99999 decimal) for any channel that was
configured for a thermocouple input and has either an open thermocouple or no
thermocouple connected to it.

Input Ranges and Gains

The DT9828 module supports an input range of ±156 mV. In software, specify a gain of 1.

If a voltage is measured on the input that is outside of the range for the selected thermocouple
type, the channel may be configured for the wrong type of thermocouple or something other
than a thermocouple may be connected to the channel.

In addition, if the input voltage is less than the legal voltage range for the selected
thermocouple type, the software returns the value TEMP_OUT_OF_RANGE_LOW (–88888
decimal). If the input voltage is greater than the legal voltage range for the selected
thermocouple type, the software returns the value TEMP_OUT_OF_RANGE_HIGH (88888
decimal).

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Содержание DT9828

Страница 1: ...DT9828 User s Manual UM 24984 A Title Page ...

Страница 2: ... rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive ...

Страница 3: ...ions to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing...

Страница 4: ......

Страница 5: ...pter 3 Wiring Signals 31 General Wiring Recommendations 33 Connecting Thermocouple Inputs 34 Connecting Voltage Input Signals 36 Connecting Current Loop Inputs 37 Connecting Digital Input Signals 38 Connecting Digital Output Signals 40 Chapter 4 Verifying the Operation of a Module 41 Selecting the Device 43 Thermocouple Measurement Example 45 Configure the Channels 45 Configure the Parameters of t...

Страница 6: ...63 Single Value Operations 63 Continuous Scan Mode 64 Filtering 65 Data Format 65 Error Conditions 66 Digital I O Features 67 Digital Input Lines 67 Digital Output Lines 67 Resolution 68 Operation Modes 68 Chapter 6 Supported Device Driver Capabilities 69 Data Flow and Operation Options 71 Buffering 72 Triggered Scan Mode 72 Data Encoding 72 Channels 73 Gain 73 Ranges 74 Resolution 74 Thermocouple...

Страница 7: ...s 95 System Temperature Error 95 Temperature Measurement Noise 97 Thermocouple Noise Calculation Example 98 Voltage Measurement Specifications 99 Input Signal Bandwidth 100 Digital I O Specifications 101 Isolation and Protection Specifications 102 Power Physical and Environmental Specifications 103 Terminal Block Specifications 104 Regulatory Specifications 105 Appendix B Pin Assignments and LED S...

Страница 8: ...Contents 8 ...

Страница 9: ...ion operations in the Microsoft Windows XP or Windows Vista Windows 7 or Windows 8 operating system It is assumed that you have some familiarity with data acquisition principles and that you understand your application How this Manual is Organized The manual is organized as follows Chapter 1 Overview describes the major features of the DT9828 module as well as the supported software and accessorie...

Страница 10: ...rom a DT9282 module DT Open Layers for NET User s Manual UM 22161 For programmers who are developing their own application programs using Visual C or Visual Basic NET this manual describes how to use the DT Open Layers for NET Class Library to access the capabilities of Data Translation data acquisition devices DataAcq SDK User s Manual UM 18326 For programmers who are developing their own applica...

Страница 11: ... a DT9828 module the Data Translation Technical Support Department is available to provide technical assistance Refer to Chapter 8 for more information If you are outside the United States or Canada call your local distributor whose number is listed on our web site www datatranslation com ...

Страница 12: ...About this Manual 12 ...

Страница 13: ...13 1 Overview Features 14 Supported Software 16 Accessories 18 Getting Started Procedure 19 ...

Страница 14: ...ntial analog inputs for thermocouple or voltage input measurements Support for B E J K N R S and T thermocouple types One cold junction compensation CJC circuit for all thermocouple inputs Open thermocouple detection Input resolution of 24 bits Analog throughput of up to 600 Samples s Input voltage range of 156 mV Four isolated TTL digital inputs you can read the status of the digital input port i...

Страница 15: ...Overview 15 500 V galvanic isolation to the computer Powered by USB bus no external power supply required A software calibration utility is provided for calibrating the analog input subsystem ...

Страница 16: ...isplay using the Channel Display window or as a waveform using the Channel Plot window Display statistics about the acquired data in the Statistics window Open recorded data in Excel for further analysis Customize many aspects of the acquisition display and recording functions to suit your needs including the clock frequency and the trigger settings You can use QuickDAQ in one of two modes Acquisi...

Страница 17: ...stem from The MathWorks and Data Translation s DT Open Layers architecture LV Link LV Link allows you to access the capabilities of the DT9828 module from the LabVIEW graphical programming language Refer to the Data Translation web site www datatranslation com for information about selecting the right software package for your needs ...

Страница 18: ...h each DT9828 module The EP365 is a 1 83 meter USB cable that connects the USB connector of the DT9828 module to the USB connector on the host computer If you want to buy additional USB cables EP365 is available as an accessory product for the DT9828 module ...

Страница 19: ...ule This diagram is repeated in each Getting Started chapter the shaded area in the diagram shows you where you are in the procedure Figure 2 Getting Started Flow Diagram Install the Module see Chapter 2 starting on page 23 Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 41 ...

Страница 20: ...Chapter 1 20 ...

Страница 21: ...Part 1 Getting Started ...

Страница 22: ......

Страница 23: ...23 2 Installing a Module Unpacking 25 Attaching Modules to the Computer 26 Configuring the Device Driver 29 ...

Страница 24: ...Chapter 2 24 Install the Module this chapter Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 41 ...

Страница 25: ...sing 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 If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com ...

Страница 26: ... using less than 500 mA therefore it does not require an external power supply Connecting Directly to the USB Ports To connect a DT9828 module directly to a USB port on your computer do the following 1 Attach one end of the EP365 USB cable which is shipped with the DT9828 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 ...

Страница 27: ... few seconds to recognize a module once it is plugged back in Connecting to an Expansion Hub Expansion hubs are powered by their own external power supply The practical number of DT9828 modules that you can connect to a single USB port depends on the throughput you want to achieve Note The bandwidth of the USB Ver 1 1 bus is 12 Mbits second Each DT9828 module running at full speed 600 kHz multiple...

Страница 28: ... 7 and Windows 8 find the device automatically 5 Repeat these steps until you have attached the number of hubs and modules that you desire Refer to Figure 4 The operating system automatically detects the USB devices as they are installed Figure 4 Attaching Multiple Modules Using Expansion Hubs Note You can unplug a module and then plug it in again if you wish without causing damage This process is...

Страница 29: ...By default this file is installed in the following location Windows 7 Windows 8 and Vista 32 bit C Windows System32 Dtolcpl cpl Windows 7 Windows 8 and Vista 64 bit C Windows SysWOW64 Dtolcpl cpl To configure the DT9828 Device Driver do the following 1 If you have not already done so power up the host computer and all peripherals 2 From the Windows Control Panel double click the Open Layers Contro...

Страница 30: ...Chapter 2 30 ...

Страница 31: ...gnals General Wiring Recommendations 33 Connecting Thermocouple Inputs 34 Connecting Voltage Input Signals 36 Connecting Current Loop Inputs 37 Connecting Digital Input Signals 38 Connecting Digital Output Signals 40 ...

Страница 32: ...mend that you run the DT9828 Series Calibration Utility prior to using the module Refer to Chapter 8 starting on page 87 for instructions Install the Module see Chapter 2 starting on page 23 Wire Signals this chapter Verify the Operation of the Module see Chapter 4 starting on page 41 ...

Страница 33: ... power lines solenoids and electric arcs unless the signals are enclosed in a mumetal shield Locate the DT9828 module as far away as possible from sources of high or low temperatures or strong air currents such as fans Prevent electrostatic discharge to the I O while the instrument is operational When wiring thermocouples use a wire insulation strip length of 0 197 inches 5 mm Use 16 AWG to 26 AWG...

Страница 34: ...ial thermocouple channels You connect thermocouple signals to the Analog Input screw terminal block TB1 of the DT9828 module shown in Figure 5 Figure 5 Analog Input Screw Terminal Block TB1 Side View Analog Input Screw Terminal Block TB1 Insert wires through the side and screw from the top ...

Страница 35: ...junction compensation CJC circuit is provided for all thermocouple input channels The software reads the value of the CJC input and applies it to the value of the thermocouple input to correct for errors based on the specified thermocouple type The output of the channel goes to positive full scale if an open circuit is detected at the input 2 DT9828 Analog Input Terminal Block TB1 High Low ...

Страница 36: ...ignal source is a voltage source that has no connection with earth ground Figure 7 Connecting Differential Voltage Inputs Shown for Analog Input Channel 0 Figure 8 illustrates how to connect a grounded nonfloating signal source to a DT9828 module Figure 8 Connecting Differential Voltage Inputs from a Grounded Signal Source Shown for Analog Input Channel 0 Floating Signal Source 1 2 CH 0 CH 0 Es DT...

Страница 37: ... Channel 0 1 2 CH 0 CH 0 4 to 20 mA User installed resistor The user installed resistor connects the high side of the channel to the low side of the corresponding channel thereby acting as a shunt If for example you add a 1 Ω resistor and then connect a 4 to 20 mA current loop input to channel 0 the input range is converted to 4 mV to 20 mV Be sure to choose a resistor such that the voltage develo...

Страница 38: ...r digital input lines You connect digital input signals to the Digital I O screw terminal TB2 of the DT9828 module shown in Figure 10 Figure 10 Digital I O Screw Terminal Block TB2 Side View Digital I O Screw Terminal Block TB2 Insert wires through the side and screw from the top ...

Страница 39: ...t digital input signals lines 0 and 1 in this case to a DT9828 module Figure 11 Connecting Digital Inputs Shown for Digital Input Lines 0 and 1 1 2 5 Digital Input 0 Digital Input 1 Digital In Return TTL Inputs DT9828 Digital I O Terminal Block TB2 ...

Страница 40: ... supply return Each open collector output has a weak pull up resistor of 100 kΩ to the External Supply terminal of the screw terminal block TB2 Connecting a 3 3 V to 5 V supply provides outputs that are capable of driving TTL level logic Figure 12 shows an example of connecting an open collector digital output on the DT9828 module to an external supply and logic gate Figure 12 An Example of Connec...

Страница 41: ...41 4 Verifying the Operation of a Module Selecting the Device 43 Thermocouple Measurement Example 45 ...

Страница 42: ...Ethernet devices except the DT9841 Series DT9817 DT9835 and DT9853 54 This chapter describes how to verify the operation of a DT9828 module using QuickDAQ Install the Module see Chapter 2 starting on page 23 Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module this chapter ...

Страница 43: ...vice Family selection select OpenLayersDevices By default the application discovers all devices that are available for the specified device family and displays the module name for the USB devices in the drop down list If you want to refresh this list to determine if other devices are available click Refresh 4 Select the module name for the module that you want to use from the list of Available Dev...

Страница 44: ...s click the Row Selector button for the device and then click Remove 6 Once you have added all the devices that you want to use with the application click OK The latest state is saved and used when the application is next run and the interface of the QuickDAQ application is displayed ...

Страница 45: ...hannel 1 of a DT9828 module Configure the Channels Configure the channels as follows 1 Configure each analog input channel by clicking the Configuration menu and clicking Input Channel Configuration or by clicking the Input Channel Configuration toolbar button 2 Enable analog input channels 0 and 1 by clicking the checkbox under the Enable column 3 Under the Channel Name column enter a meaningful ...

Страница 46: ...fig Acquisition tab In this example Deg C is used 6 If you know the offset for your calibrated thermocouple enter it under the EU Offset column For this example leave 0 as the EU offset for the thermocouple 7 Leave the test point values for each channel unchanged 8 Click Close to close the Channel Configuration dialog box Configure the Parameters of the Acquisition Config Window For this example s...

Страница 47: ...Acquisition Info area is updated based on the acquisition duration that is selected 5 For X Axis Span leave 10 seconds as the span for the x axis 6 Click the Acquisition tab 7 For this example ensure that the following default settings are used Per Channel Sampling Frequency 300 Hz Trigger Source Software Temperature Unit Celsius Filter type Moving Average 8 If desired hide the Acquisition Config ...

Страница 48: ... c Under Plot Column use the default plot column setting of 1 for both enabled channels d Under the Signal Group column select A for both thermocouple channels e Under the Color column assign a unique color to each trace 2 In the display area click the tab for the Channel Plot window 3 Click the Show Legend control on the toolbar 4 Change the text for the label on the x axis by doing the following...

Страница 49: ...Verifying the Operation of a Module 49 ...

Страница 50: ...of the Channel Display window as follows 1 Ensure that the Visible Display column in the Plot and Data Config window is checked for both enabled channels 2 Click the Channel Display Control tab and select the Hide Unused Channels checkbox so that only analog input channels 0 and 1 are displayed ...

Страница 51: ...ics column in the Plot and Data Config window is checked for both channels 2 If desired hide the Plot and Data Config window by clicking the Auto Hide pin in the top right corner of the window Position the Windows If you want see the data that is displayed in the Channel Display Channel Plot and Statistics windows at once you need to move the windows to different locations in the display area In t...

Страница 52: ...the mouse over the guide on the bottom of the guide diamond and then release the mouse button The Statistics window is now placed at the bottom of the display area 2 Click the tab for the Channel Plot window drag the window toward the middle of the display area move the mouse over the guide on the bottom of the guide diamond and then release the mouse button The Channel Plot window is now placed i...

Страница 53: ...ured the channels and the display area start acquisition and log data to disk by clicking the Record toolbar button Results similar to the following are displayed in the display area If desired you can view the data in Excel by clicking the Open Current Data in Excel toolbar button ...

Страница 54: ...Chapter 4 54 ...

Страница 55: ...Part 2 Using Your Module ...

Страница 56: ......

Страница 57: ...57 5 Principles of Operation Analog Input Features 59 Digital I O Features 67 ...

Страница 58: ... MUX Controls Bus Interface and Control Registers USB High Speed Interface EEPROM FPGA Digital In Opto Coupled x 4 12 Pos Term Block 16 Pos Term Block Status LED DC DC CJ Sensor FPGA 5 V DC USB Isolated Power 8 Thermocouple or Differential Voltage Inputs 4 Digital Outputs 4 Digital Inputs 500 V Isolation Barrier Break Detection on each channel Digital Output Supply Digital Output Return USB 2 0 ...

Страница 59: ... described on page 63 Filtering described on page 65 Data format described on page 65 Error conditions described on page 66 Analog Input Channels The DT9828 module supports eight differential analog input channels You can use the analog input channels for thermocouple or voltage measurements You wire these inputs to the screw terminals on the module Refer to Chapter 3 starting on page 31 for wirin...

Страница 60: ...put channels using an analog input channel list You can group the channels in the list sequentially starting either with 0 or with any other analog input channel or randomly You can also specify a single channel or the same channel more than once in the list Using software specify the analog input channels in the order you want to sample them You can enter up to 1024 entries in the channel list Fo...

Страница 61: ...ormation on this feature Open Thermocouple Detection A 10 MΩ pull up resistor is provided on the high side input of each differential thermocouple channel for open thermocouple detection When an open thermocouple is detected a positive full scale input voltage is returned The software returns the value SENSOR_IS_OPEN 99999 decimal for any channel that was configured for a thermocouple input and ha...

Страница 62: ...puted as follows Data Rate per Channel Throughput Rate Number of Channels For example to sample all eight channels at the maximum rate the data rate per channel is 600 8 or 75 Samples s Using software specify the channels that you want to sample in the channel list and then set the desired sampling frequency The software sets the sampling frequency to the closest possible value You can use softwar...

Страница 63: ... 7 The module acquires the data from the specified channel and returns the data immediately For single value operations you cannot specify a clock frequency trigger source scan mode or buffer Single value operations stop automatically when finished you cannot stop a single value operation Table 2 Example of Per Channel Sampling Frequency Number of Input Channels Total Throughput Hz 600 300 200 120...

Страница 64: ... stop the module finishes acquiring the current buffer stops all subsequent acquisition and transfers the acquired data to host memory any subsequent triggers are ignored In an abrupt stop the module stops acquiring samples immediately the current buffer is not completely filled it is returned to the application only partially filled and any subsequent triggers are ignored The conversion rate is d...

Страница 65: ...and divides by 16 None No filter raw data Use this option when you want to acquire fast thermocouple response times The response time is determined by the ADC data rate Higher throughput rates data rates yield faster response times but the increased bandwidth also results in higher noise Data Format If you specify a thermocouple type of None for a thermocouple input channel a voltage measurement i...

Страница 66: ...orted to the host 99999 0 SENSOR_IS_OPEN described on page 61 88888 0 TEMP_OUT_OF_RANGE_HIGH described on page 61 88888 0 TEMP_OUT_OF_RANGE_LOW described on page 61 An additional error will be reported if a ESD spike causes an analog input channel to stop working If the instrument is scanning when this occurs scanning will stop and an error will be reported To resume scanning you must restart the ...

Страница 67: ...0 Digital Output Lines The DT9828 module features four isolated open collector digital output lines The digital outputs have a common return that is isolated from the USB ground analog input ground and digital input ground Each digital output has a 100 kΩ pull up resistor to the External Supply terminal on the digital I O terminal block You can connect an external supply in the 3 3 VDC to 30 VDC r...

Страница 68: ...urce Single value operations stop automatically when finished you cannot stop a single value operation Continuous digital input takes full advantage of the capabilities of the DT9828 module You can specify a sampling frequency conversion mode trigger source and buffer for the operation For the DT9828 enter the digital input port as channel 8 in the analog input channel list Refer to page 60 for mo...

Страница 69: ...ion Options 71 Buffering 72 Triggered Scan Mode 72 Data Encoding 72 Channels 73 Gain 73 Ranges 74 Resolution 74 Thermocouple and RTD Support 75 IEPE Support 75 Strain Gage Support 76 Start Triggers 76 Reference Triggers 77 Clocks 77 Counter Timers 78 Tachometer 79 ...

Страница 70: ...em types The first column in each table lists all possible subsystem capabilities A description of each capability is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note The following tables include the capabilities that can be queried However some capabilities may not be supported by your device Blank fields represent unsupported options For ...

Страница 71: ...tal input lines using the analog input channel list Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Supports Programmable Synchronization Modes SupportsSynchronization Synchronization Modes ...

Страница 72: ...tions DT9828 A D D A DIN DOUT C T TACH QUAD Triggered Scan Support SupportsTriggeredScan Maximum Number of CGL Scans per Trigger MaxMultiScanCount 1 0 0 0 0 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 0 0 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 0 0 0 0 0 0 Table 7 Data Encoding Options DT9828 A D D A DIN DOUT C T TACH QUAD Binary Encoding Support SupportsBinaryEncoding Yes Ye...

Страница 73: ...8a 0 1 1 0 0 0 Maximum Channel Gain List Depth CGLDepth 1024a a For the DT9828 channels 0 to 7 correspond to the analog input channels and channel 8 corresponds to the digital input port digital lines 0 to 3 0 0 0 0 0 0 Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibit SupportsChannelListInhibit Table 9 Gain Options DT9828 A D D A DIN DOUT C T TACH QUAD Progr...

Страница 74: ...s 1 0 0 0 0 0 Available Ranges SupportedVoltageRanges 156 mV 0 Current Output Support SupportsCurrentOutput Table 11 Resolution Options DT9828 A D D A DIN DOUT C T TACH QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1 1 1 Available Resolutions SupportedResolutions 24 4 4 ...

Страница 75: ...ceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Yes Supports Data Filters SupportsTemperatureFilters Yes Temperature Filter Types TemperatureFilterType Yesa a Supports both Moving Average and Raw none filter types Table 13 IEPE Support Options DT9828 A D D A DIN DOUT C T TACH QUAD Software Programmable AC Couplin...

Страница 76: ...Voltage MaxExcitationVoltage Table 15 Start Trigger Options DT9828 A D D A DIN DOUT C T TACH QUAD Software Trigger Support SupportsSoftwareTrigger Yes External Positive TTL Trigger Support SupportsPosExternalTTLTrigger External Negative TTL Trigger Support SupportsNegExternalTTLTrigger External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negati...

Страница 77: ...igger Sync Bus Support SupportsSyncBusTrigger Analog Input Channels Supported for the Threshold Trigger SupportedThresholdTriggerChannels Post Trigger Scan Count Support SupportsPostTriggerScanCount Table 17 Clock Options DT9828 A D D A DIN DOUT C T TACH QUAD Internal Clock Support SupportsInternalClock Yes External Clock Support SupportsExternalClock Simultaneous Input Output on a Single Clock Si...

Страница 78: ...sure High to Low Output Pulse Support SupportsHighToLowPulse Low to High Output Pulse Support SupportsLowToHighPulse Variable Pulse Width Support SupportsVariablePulseWidth None internal Gate Type Support SupportsGateNone High Level Gate Type Support SupportsGateHighLevel Low Level Gate Type Support SupportsGateLowLevel High Edge Gate Type Support SupportsGateHighEdge Low Edge Gate Type Support Su...

Страница 79: ...pabilities 79 Tachometer Table 19 Tachometer Options DT9828 A D D A DIN DOUT C T TACH QUAD Tachometer Falling Edges SupportsFallingEdge Tachometer Rising Edges SupportsRisingEdge Tachometer Stale Data Flag SupportsStaleDataFlag ...

Страница 80: ...Chapter 6 80 ...

Страница 81: ...81 7 Calibration About Calibration 82 Running the Calibration Utility 83 Calibrating the Voltage Offset and Gain 84 Calibrating the CJC 85 ...

Страница 82: ...ctory calibration provides accurate temperature measurements however for utmost accuracy it is recommended that you use the DT9828 Series Calibration Utility to recalibrate the module with the thermocouples you wish you to use Thereafter we recommend that you check and if necessary recalibrate the module every six months Note Ensure that you installed the DT9828 Device Driver prior to using the DT...

Страница 83: ...fter the module has been warmed up for 10 minutes To run the DT9828 Series Calibration Utility do the following 1 Click Start from the Task Bar 2 Browse to Programs Data Translation Inc Calibration DT9828 Series Calibration Utility The main menu appears 3 Select the module to calibrate and then click OK ...

Страница 84: ... Wire a shorting plug to analog input channel 0 2 From the Voltage Calibration section of the dialog box click Run 3 Ensure that 0 V is applied to analog input channel 0 and then click OK The voltage offset value is calibrated automatically 4 Apply 140 mV to analog input channel 0 and then click OK The voltage gain value is calibrated automatically Note If you are not satisfied with the analog inp...

Страница 85: ... the dialog box enter the following values Temp Target The exact temperature of the calibration bath Thermocouple Type The type of thermocouple that is connected to the analog input channel Type B Type E Type J Type K Type N Type R Type S or Type T Channel The analog input channel 0 to 7 to which the thermocouple is connected Unit The temperature unit of the CJC measurement C F or K 4 Click Run 5 ...

Страница 86: ...Chapter 7 86 ...

Страница 87: ...87 8 Troubleshooting General Checklist 88 Technical Support 90 If Your Module Needs Factory Service 91 ...

Страница 88: ...till experience problems try using the information in Table 20 to isolate and solve the problem If you cannot identify the problem refer to page 90 Table 20 Troubleshooting Problems Symptom Possible Cause Possible Solution Module is not recognized You plugged the module into your computer before installing the device driver From the Control Panel System Hardware Device Manager uninstall any unknow...

Страница 89: ...pter 3 Your module may need recalibration The module is calibrated at the factory Thereafter yearly calibration is recommended Use the DT9828 Calibration Utility described on Chapter 7 or return your module to Data Translation for recalibration For information on factory recalibration contact Data Translation at 508 481 3700 ext 1323 if you are in the USA of call your local distributor if you are ...

Страница 90: ...lation com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and te...

Страница 91: ...slation com for the name and telephone number of you nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the module in an electrically conductive plastic material Handle with ground protection A static discharge can destroy component...

Страница 92: ...Chapter 8 92 ...

Страница 93: ...rmocouple Specifications 95 Voltage Measurement Specifications 99 Digital I O Specifications 101 Isolation and Protection Specifications 102 Power Physical and Environmental Specifications 103 Terminal Block Specifications 104 Regulatory Specifications 105 ...

Страница 94: ...e Specifications Feature Specifications Number of analog input channels 8 Differential 0 to 7 Number of digital input lines 4 Number of digital output lines 4 Input functions Thermocouples or voltage inputs A D converter type High stability 24 bit Delta Sigma Data coding Analog input Digital I O 32 bit Floating point Binary ...

Страница 95: ...ations Feature Specifications Number of thermocouple channels Up to 8 differential thermocouples Thermocouple types software selectable J K T B E N R S A D converter resolution 24 bits Full scale input range 156 mV Aggregate sample rate throughput 600 Samples s maximum Sampling mode Multiplexed Accuracy for Type K thermocouples 0 09 C typical thermocouple at 25 C see Table 23 and Table 24 for comp...

Страница 96: ...0 C 0 19 C 0 20 C 0 17 C 0 40 C 0 37 C 0 65 C 0 20 C 700 C 0 24 C 0 24 C 0 23 C 0 43 C 0 40 C 0 52 C 0 25 C 900 C 0 25 C 0 34 C 0 29 C 0 46 C 0 42 C 0 47 C 0 30 C 1100 C 0 33 C 0 38 C 0 48 C 0 44 C 0 45 C 0 36 C 1400 C 0 54 C 0 50 C 0 46 C Table 24 Maximum Thermocouple Measurement Accuracy of the DT9828 at 0 C to 50 C Thermocouple Temperature Thermocouple Typea a Conditions for accuracy measuremen...

Страница 97: ... noise voltage by the sensitivity of the thermocouple type being used at the particular measurement temperature Thermocouple sensitivities can be derived from commonly available NIST National Institute of Standards and Technology Thermocouple Reference Tables The voltage noise from the analog input circuitry is a function of the programmed throughput rates and the software filter setting Table 25 ...

Страница 98: ...nput voltage noise at the stated throughput rate and filter setting From Table 25 the voltage noise is 3 μV pk pk for a throughput rate of 600 Samples s and the moving average filter 3 Determine the sensitivity of the specified thermocouple type at the measurement temperature From the NIST Thermocouple Reference Tables the sensitivity of a Type K thermocouple at 100 C is 41 5 μV C 4 Calculate the ...

Страница 99: ...lution 24 bits Full scale input range 156 mV Aggregate sample rate 600 Samples s maximum Sampling mode Multiplexed DC differential input impedance 10 MΩ Input bias current 250 nA Input common mode voltage 500 V Differential input voltage 10 V maximum protection Common mode rejection 60 Hz and 50 Hz 120 dB Noise 3 μV pk pk at maximum throughput see Table 25 on page 97 for more information Input sig...

Страница 100: ... total throughput x 2 As an example if four channels are enabled at a per channel sampling frequency of 10 Hz the input signal bandwidth is 80 Hz 40 Hz x 2 For proper reconstruction of acquired signals ensure that the per channel sampling frequency is set in accordance with the Nyquist criteria That is set the per channel sampling frequency to a minimum of twice the frequency of the signal to be a...

Страница 101: ...ype Input high voltage Input low voltage Input voltage limits Level sensitive Optocoupler 2 2 kΩ in series with LED 2 0 V minimum 0 8 V maximum 5 V to 30 V relative to Digital Input Return Digital Outputs Output characteristics Current sink capability Output voltage range Vext range Off state leakage Open collector 100 kΩ pull up to Vext input 2 mA minimum VCE sat 0 35 V maximum 30 V maximum 30 V ...

Страница 102: ...ecifications for the analog input subsystem on the DT9828 module Table 28 Isolation and Protection Specifications Feature Specifications ESD protection per standard EN6100 4 2 2009 see page 105 for more Arc Contact 8 kV 4 kV Isolation voltage from analog input and digital I O to the host computer 500 V ...

Страница 103: ...wer Physical and Environmental Specifications Feature Specifications Power 5 V 5 from USB host 200 mA maximum Physical Dimensions Height 1 472 inches 37 39 mm Width 4 175 inches 106 05 mm Length 6 030 inches 153 16 mm Weight 6 95 oz 197 g Environmental Operating temperature range Storage temperature range Relative humidity 0 C to 55 C 25 C to 85 C To 95 noncondensing ...

Страница 104: ...ifies a wire insulation strip length of 0 197 inches 5 mm and a wire size of 26 AWG minimum and 16 AWG maximum Table 30 Terminal Block Specifications Feature Specifications Analog Input Screw Terminal Block TB1 16 Position Header Phoenix Contact 1984756 Digital I O Screw Terminal Block TB2 12 Position Header Phoenix Contact 3 5 mm vertical 1984714 ...

Страница 105: ...surement Control and Laboratory Use EMC Requirements EN61000 4 2 2009 Electrostatic Discharge ESD 4 kV contact discharge 8 kV air discharge 4 kV horizontal and vertical coupling planes EN61000 4 3 2006 Radiated electromagnetic fields 3 V m 80 to 1000 MHz 3 V m 1 4 GHz to 2 GHz 1 V m 2 GHz to 2 7 GHz EN61000 4 4 2004 Electrical Fast Transient Burst EFT 1 kV on data cables EN61000 4 6 2009 Conducted...

Страница 106: ...Appendix A 106 ...

Страница 107: ...107 B Pin Assignments and LED Status Indicators Analog Input Screw Terminal Block TB1 108 Digital I O Screw Terminal Block TB2 109 USB Connector 110 LED Status Indicators 111 ...

Страница 108: ...able 32 Analog Input Screw Terminal Block TB1 on the DT9828 Module Screw Terminal Signal Description 1 Analog Input 0 2 Analog Input 0 3 Analog Input 1 4 Analog Input 1 5 Analog Input 2 6 Analog Input 2 7 Analog Input 3 8 Analog Input 3 9 Analog Input 4 10 Analog Input 4 11 Analog Input 5 12 Analog Input 5 13 Analog Input 6 14 Analog Input 6 15 Analog Input 7 16 Analog Input 7 ...

Страница 109: ...ble 33 Digital I O Screw Terminal Block TB2 on the DT9828 Module Screw Terminal Signal Description 1 Digital Input 0 2 Digital Input 1 3 Digital Input 2 4 Digital Input 3 5 Digital Input Return 6 Digital Output 0 7 Digital Output 1 8 Digital Output 2 9 Digital Output 3 10 Digital Output Return 11 Digital Output Supplya a Supplies ranging from 3 VDC to 30 VDC are supported 12 Digital Output Supply ...

Страница 110: ...n of the pins used by the USB connector on the DT9828 module Figure 15 External USB Connector Table 34 lists the pin assignments of the USB connector Table 34 J8 USB Connector Pin Assignments Pin Description 1 USB 5 V 2 USB Data 3 USB Data 4 USB Ground 1 2 3 4 ...

Страница 111: ...tors The DT9828 module has a single bi color LED that indicates the status of the module as described in Table 35 Table 35 LED Status Indicators on the DT9828 Module Color of the LED Status Description Green Module is powered Blinking amber Module is acquiring data ...

Страница 112: ...Appendix B 112 ...

Страница 113: ...cq 16 QuickDAQ 2013 16 attaching the module to the computer 26 B base clock frequency 77 BaseClockFrequency 77 binary encoding 72 buffers 72 inprocess flush 72 C C C programs 16 cables EP365 18 26 calibration calibrating the CJC 85 calibrating voltage offset and gain 84 running the utility 83 CGL see channel gain list 73 CGLDepth 73 channel type differential 73 channel gain list 60 depth 73 channe...

Страница 114: ...pecifications 103 104 EP365 18 26 errors analog input 66 examples thermocouple measurement 45 external clock divider maximum 77 minimum 77 external USB connector 110 F factory service 91 features 14 FIFO size 71 FIFOSize 71 filters 65 75 floating point numbers 72 formatting data analog input 65 frequency base clock 77 internal A D sample clock 62 77 G gain actual available 73 number of 73 H hot sw...

Страница 115: ...TB2 Digital I O 109 SDK 16 SENSOR_IS_OPEN 61 service and support procedure 90 single value operations 71 analog input 63 digital I O 68 size module 103 software supported 16 software trigger 63 76 specifications 93 basic instrument 94 digital I O 101 environmental 103 104 isolation and protection 102 physical 103 104 power 103 104 regulatory 105 system temperature error 95 thermocouple 95 voltage ...

Страница 116: ... troubleshooting procedure 88 service and support procedure 90 troubleshooting table 88 U unpacking 25 USB cable 18 26 USB LED 26 V Visual Basic for NET programs 16 Visual C programs 16 voltage converted to temperature in hardware 75 voltage measurement specifications 99 voltage ranges 74 number of 74 W warm up time 33 wiring signals current loop analog inputs 37 digital inputs 38 digital outputs ...

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