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Principles of Operation

51

As a guideline, the sampling frequency of the DT9824 should be a least 2.5 times the highest 
input signal frequency that you are trying to measure. For example, to accurately sample a 
400 Hz signal, it is recommended that you specify a sampling frequency of at least 1000 Hz.

The actual frequency that the module can achieve may be slightly different than the frequency 
you specified due to the accuracy of the clock. You can determine the actual clock frequency 
using software.

Triggers

A trigger is an event that occurs based on a specified set of conditions. The DT9824 module 
supports the following trigger sources:

•

Software trigger

 – A software trigger event occurs when you start the analog input 

operation (the computer issues a write to the module to begin conversions). Using 
software, specify the trigger source as a software trigger.

•

External trigger

 – An external digital trigger occurs when the DT9824 module detects 

either a falling-edge or rising-edge on the External trigger line. The edge-type is 
software-programmable. 

The external trigger connection is a differential input, allowing for TTL-level or switch 
connections. The positive side is pulled up to +5 V. If you are using the external trigger to 
detect a contact closure, ensure that you configure the polarity of the external trigger for a 
falling-edge (high-to-low) transition.

Analog Input Conversion Modes 

The DT9824 module supports the following conversion modes: 

•

Single-value operations

 are the simplest to use but offer the least flexibility and 

efficiency. Using software, you can specify the range, gain, and index of the analog input 
channel, and acquire the data from that channel. The data is returned immediately. For a 
single-value operation, you cannot specify a clock source, trigger source, or buffer. 

Single-value operations stop automatically when finished; you cannot stop a single-value 
operation.

•

Continuous mode

 takes full advantage of the capabilities of the DT9824 module. You can 

specify a trigger source and buffer using software. (Refer to 

page 53

 for more information 

on buffers.)

You can stop a continuous operation by performing either an orderly stop or an abrupt 
stop using software. In an orderly stop, the module finishes acquiring the data, stops all 
subsequent acquisition, and transfers the acquired data to host memory; all subsequent 
triggers are ignored. In an abrupt stop, the module stops acquiring samples immediately; 
the acquired data is not transferred to host memory, and all subsequent triggers or 
retriggers are ignored. 

The conversion rate is determined by the frequency of the A/D sample clock; refer to 

page 

50

 for more information on the 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). 

Содержание DT9824

Страница 1: ...DT9824 UM 23782 G User s Manual Title Page ...

Страница 2: ...nt 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 Driv...

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: ...ting Directly to the Host Computer 24 Connecting to a Self Powered USB Hub 25 Configuring the Driver 27 Chapter 3 Wiring Signals 29 Preparing to Wire Signals 31 Connecting Analog Input Signals 33 Connecting Digital I O Signals 34 Connecting Digital Input Signals 35 Connecting Digital Output Signals 36 Chapter 4 Verifying the Operation of the Module 37 Running the Quick DataAcq Application 39 Testi...

Страница 6: ...g Input Conversion Modes 51 Data Format 52 Data Transfer 53 Error Conditions 53 Digital I O Features 54 Digital Input Lines 54 Digital Output Lines 54 Channel to Channel Isolation 55 Resolution 55 Operation Modes 55 Chapter 6 Supported Device Driver Capabilities 57 Data Flow and Operation Options 59 Buffering 60 Triggered Scan Mode 60 Data Encoding 60 Channels 61 Gain 61 Ranges 62 Resolution 62 Th...

Страница 7: ...ervice 79 Appendix A Specifications 81 Analog Input Specifications 82 Noise 84 Frequency Response and Input Bandwidth 85 Digital I O Specifications 88 Power Physical and Environmental Specifications 89 Regulatory Specifications 90 Connector Specifications 91 Appendix B Connector Pin Assignments and LED Status Indicators 93 Analog Input Screw Terminals 94 Digital I O Connector 95 USB Connector 96 L...

Страница 8: ...Contents 8 ...

Страница 9: ...cquisition operations in the Microsoft Windows Windows XP Windows Vista or Windows 7 operating systems It is assumed that you have some familiarity with data acquisition principles and that you understand your application How this Manual is Organized This manual is organized as follows Chapter 1 Overview describes the major features of the DT9824 module as well as the supported software and access...

Страница 10: ...ial 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 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 ...

Страница 11: ...he 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 www datatranslation com ...

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

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

Страница 14: ...e 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 The DT9824 module provides the following major features USB compatibility ISO Channel protection eliminates noise and ground loops 500 V galvanic isolation channel to channel for all analog input signals and to the host computer to protect si...

Страница 15: ...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 You can read the digital input port through the analog input data stream for correlating analog and digital measurements ...

Страница 16: ... acquisition analyze it and or save it to disk for later analysis 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 your own application software for a DT9824 module using Visual Studio 2003 or Visual Studio 2005 the class library complies with the DT Open Layers standard DataAcq SDK Use the Data Acq SDK if you want to use Vi...

Страница 17: ...l connections for accessing the digital I O signals on a DT9824 module EP333 The EP333 is a 2 meter shielded cable with two 37 pin connectors that connects the STP37 screw terminal panel to the digital I O connector of the module EP380 Single rack mount kit for mounting one DT8824 instrument module into a 1U rack EP379 Dual Rack mount kit for mounting two DT8824 instrument modules side by side int...

Страница 18: ... diagram is repeated in each getting started chapter the shaded area in the diagram shows you where you are in the getting started procedure Figure 2 Getting Started Flow Diagram Install the Module see Chapter 2 starting on page 21 Wire Signals see Chapter 3 starting on page 29 Verify the Operation of the Module see Chapter 4 starting on page 37 ...

Страница 19: ...Part 1 Getting Started ...

Страница 20: ......

Страница 21: ...21 2 Installing the Module Unpacking 23 Attaching Modules to the Computer 24 Configuring the Driver 27 ...

Страница 22: ...Chapter 2 22 Install the Module and Configure the Device Driver this chapter Wire Signals see Chapter 3 starting on page 29 Verify the Operation of the Module see Chapter 4 starting on page 37 ...

Страница 23: ...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 If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com ...

Страница 24: ...ectly to the Host Computer Generally host computers have two or more USB ports These ports are completely independent 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 sho...

Страница 25: ...of the USB Ver 1 1 bus is 12 Mbits second For each DT9824 module the maximum sample rate is 4800 Samples s x 4 bytes per samples x 5 channels 4 analog input channels and the digital input port Therefore if you want to achieve full throughput on each module you should connect no more than four DT9824 modules to a single USB Ver 1 1 port To connect a DT9824 module to a self powered USB hub do the fo...

Страница 26: ...o Figure 4 The operating system automatically detects the USB devices as they are installed 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 Your application may take a few seconds to recognize a module once it is plugged back in EP365 Cabl...

Страница 27: ...lick the DTOLCPL CPL file and select Run as administrator By default this file is installed in the following location Windows 7 and Vista 32 bit C Windows System32 Dtolcpl cpl 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 doubl...

Страница 28: ...Chapter 2 28 ...

Страница 29: ...29 3 Wiring Signals Preparing to Wire Signals 31 Connecting Analog Input Signals 33 Connecting Digital I O Signals 34 ...

Страница 30: ...Chapter 3 30 Install the Module see Chapter 2 starting on page 21 Wire Signals this page Verify the Operation of the Module see Chapter 4 starting on page 37 ...

Страница 31: ...onnecting analog input signals The rear panel of the DT9824 module shown in Figure 6 has a 37 pin digital I O connector for attaching 8 opto isolated digital input signals and 8 opto isolated digital output signals Figure 5 Analog Input Connectors of the DT9824 Front Panel Figure 6 Digital I O Connector of the DT9824 Rear Panel Analog Input Channels Digital I O Connector ...

Страница 32: ...noids and electric arcs unless the signals are enclosed in a mumetal shield Prevent electrostatic discharge to the I O while the DT9824 module is operational Connect all unused analog input channels to analog ground When first installing the module try wiring the signals as follows Wire a function generator or a known voltage source to analog input channel 1 using the differential configuration Wi...

Страница 33: ... input connections Figure 7 Screw Terminal Block Numbering for Analog Input Connections Figure 8 shows how to connect voltage inputs to the DT9824 Figure 8 Connecting Voltage Inputs Note For best accuracy when connecting voltage inputs use twisted pair wires with a dead ended shield connected to pin 4 of the screw terminal block 1 3 2 No Connect 4 GND Vin Vin Analog Input Channel 1 2 4 3 Shield Pi...

Страница 34: ...24 module Connect the STP37 to the digital I O connector of the module as shown in Figure 9 Figure 9 Connecting the STP37 to the DT9824 Module Figure 10 shows the layout of the STP37 screw terminal panel and lists the assignments of each screw terminal EP333 Cable Assembly STP37 Connect the EP333 Cable to the Digital I O Connector of DT9824 Module and to the STP37 ...

Страница 35: ...ital Input 3 Digital Input 3 Digital Input 4 Digital Input 4 Digital Input 5 Digital Input 5 Digital Input 6 Digital Input 6 Digital Input 7 Digital Input 7 Not Connected Not Connected Digital Output 7 Digital Output 6 Digital Output 6 Digital Output 5 Digital Output 5 Digital Output 4 Digital Output 4 Digital Output 3 Digital Output 3 Digital Output 2 Digital Output 2 Digital Output 1 Digital Out...

Страница 36: ...s of the module to control solid state or mechanical relays or high current electric motors Figure 12 shows how to connect digital output signals to line 0 of the module to control a motor relay Figure 12 Switching up to 30 V at 400 mA Digital Out 0 Digital Out 0 pin 10 120 V AC or 240 V AC Relay Motor 10 A Fuse Neutral Hot 30V DC 400 mA pin 29 DT9824 Digital I O Connector Output can switch AC or ...

Страница 37: ...he Module Running the Quick DataAcq Application 39 Testing Single Value Analog Input 40 Testing Continuous Analog Input 41 Testing Continuous Analog Input 41 Testing Single Value Digital Input 42 Testing Single Value Digital Output 43 ...

Страница 38: ...inuously from one or more analog input channels using an oscilloscope strip chart or Fast Fourier Transform FFT view Output data from a single digital output port Save the input data to disk This chapter describes how to install and run the Quick DataAcq application Install the Module and Configure the Device Driver see Chapter 2 starting on page 21 Wire Signals see Chapter 3 starting on page 29 V...

Страница 39: ...e to Programs Data Translation Inc DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features 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 th...

Страница 40: ...ck 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 5 In the Range list box select the range for the channel The default is 10 V 6 Select Differential 7 Click Get to a...

Страница 41: ...lbar 6 From the Config menu select ChannelType and then select Differential 7 From the Config menu select Range and then select Bipolar The default is Bipolar 8 From the Scope view double click the input range of the channel to change the input range of the module 10 V 1 25 V 0 625 V or 0 3125 V The display changes to reflect the selected range for all the analog input channels on the module 9 In ...

Страница 42: ...ore information on connecting digital inputs 2 In the Quick DataAcq application choose Digital 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 Select digital input port A by clicking Port A 5 Click Get The application displays the value of each digital input line in port A on the scre...

Страница 43: ...T9824 module from the Board list box Note Once you select the module the LED on the module turns green 4 Select digital output port B by clicking Port B 5 Click the appropriate bits to select the type of signal to write from the digital output lines If the bit is selected a high level signal is output from the digital output line if the bit is not selected a low level signal is output from the dig...

Страница 44: ...Chapter 4 44 ...

Страница 45: ...45 Part 2 Using Your Module ...

Страница 46: ...Chapter 46 ...

Страница 47: ...47 5 Principles of Operation Analog Input Features 49 Digital I O Features 54 ...

Страница 48: ...Chapter 5 48 Figure 13 shows a block diagram of the DT9824 module Figure 13 Block Diagram of the DT9824 Module ...

Страница 49: ...alog input channels are numbered 1 to 4 in software the index of a channel is zero based Therefore to access channel 1 specify an index of 0 in software Similarly to access channel 4 specify an index of 3 in software Specifying a Single Analog Input Channel The simplest way to acquire data from a single analog input channel is to use a single value analog input operation using software refer to pa...

Страница 50: ...u can choose from up to 4 gains 1 8 16 or 32 Table 2 lists the supported gains and effective input range of each input range on the DT9824 module Choose the gain that has the smallest effective range that includes the signal you want to measure For example if the range of your analog input signal is 1 05 V specify a range of 10 V for the A D subsystem and use a gain of 8 for the channel the effect...

Страница 51: ...er for a falling edge high to low transition Analog Input Conversion Modes The DT9824 module supports the following conversion modes Single value operations are the simplest to use but offer the least flexibility and efficiency Using software you can specify the range gain and index of the analog input channel and acquire the data from that channel The data is returned immediately For a single val...

Страница 52: ...illustrates continuous wrap mode using a channel list with five entries analog input channel indices 0 1 2 3 and the digital input data index 4 In this example data is acquired simultaneously on all channels on each clock pulse of the input sample clock Data is acquired continuously until all the queued buffers have been filled or you stop the operation Figure 14 Continuous Wrap Mode Data Format T...

Страница 53: ...777216 Vin 2010 0 00000119 10 0 Vin 9 998 V Data Transfer The DT9824 module transfers data to a user buffer that you allocate in the host computer Keep the following recommendations in mind when allocating user buffers for continuous analog input operations on the DT9824 module Allocate a minimum of two user buffers Specify the width of the buffer as 4 bytes Data is written to the allocated buffer...

Страница 54: ...put Lines The DT9824 module features eight isolated digital input lines Digital inputs operate from 3 to 28 V DC with a switching time of 2 ms maximum Figure 15 shows the digital input circuitry a 2 2 kΩ resistor is used in series with the LED in the opto isolator input Figure 15 Digital Input Circuitry A digital line is high switch is closed if its value is 1 a digital line is low switch is open ...

Страница 55: ...ated digital input lines and a resolution of eight bits for the digital output port to accommodate the eight isolated digital output lines These lines are organized as isolated dedicated ports You cannot configure port resolution through software Operation Modes The following digital I O operation modes are supported for the DT9824 module Single value operations are the simplest to use but offer t...

Страница 56: ...Chapter 5 56 ...

Страница 57: ... and Operation Options 59 Buffering 60 Triggered Scan Mode 60 Gain 61 Channels 61 Ranges 62 Resolution 62 Thermocouple and RTD Support 63 IEPE Support 63 Strain Gage Support 64 Triggers 64 Reference Triggers 65 Clocks 65 Counter Timers 66 Tachometers 67 ...

Страница 58: ...le lists the subsystem 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 unsu...

Страница 59: ...es Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Supports Programmable Synchronization Modes SupportsSynchronization Synchronization Modes SynchronizationMode Interrupt Support Sup...

Страница 60: ... A DIN DOUT C T TACH QUAD Triggered Scan Support SupportsTriggeredScan Maximum Number of CGL Scans per Trigger MaxMultiScanCount 1 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 0 0 Table 7 Data Encoding Options DT9824 A D D A DIN DOUT C T TACH QUAD Binary Encoding Support SupportsBinaryEncoding Yesa a The DT9824 uses offset binary encoding fo...

Страница 61: ...nded Yes Yes SE Channels MaxSingleEndedChannels 0 1 1 DI Support SupportsDifferential Yes DI Channels MaxDifferentialChannels 5 0 0 Maximum Channel Gain List Depth CGLDepth 5 0 0 Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibit SupportsChannelListInhibit Table 9 Gain Options DT9824 A D D A DIN DOUT C T TACH QUAD Programmable Gain Support SupportsProgrammable...

Страница 62: ...0 0 0 0 0 Available Ranges SupportedVoltageRanges 10 V Current Output Support SupportsCurrentOutput Table 11 DT9824 Resolution Options DT9824 A D D A DIN DOUT C T TACH QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1 0 1 1 0 0 Available Resolutions SupportedResolutions 24 8 8 ...

Страница 63: ...hannel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType Table 13 IEPE Support Options DT9824 A D D A DIN DOUT C T TACH QUAD Software Programmable AC Coupling SupportsACCoupling Software Programma...

Страница 64: ...MaxExcitationVoltage Table 15 Trigger Options DT9824 A D D A DIN DOUT C T TACH QUAD Software Trigger Support SupportsSoftwareTrigger Yes Yes Yes External Positive TTL Trigger Support SupportsPosExternalTTLTrigger Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Nega...

Страница 65: ...Bus Support SupportsSyncBusTrigger Analog Input Channels Supported for the Threshold Trigger SupportedThresholdTriggerChannels Post Trigger Scan Count Support SupportsPostTriggerScanCount Table 17 Clock Options DT9824 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 Signal Suppor...

Страница 66: ...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 67: ...pabilities 67 Tachometers Table 19 Tachometer Options DT9824 A D D A DIN DOUT C T TACH QUAD Tachometer Falling Edges SupportsFallingEdge Tachometer Rising Edges SupportsRisingEdge Tachometer Stale Data Flag SupportsStaleDataFlag ...

Страница 68: ...Chapter 6 68 ...

Страница 69: ...69 7 Calibration Overview 70 Using the Auto Calibration Procedure 71 Using the Manual Calibration Procedure 72 ...

Страница 70: ... 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 To calibrate the 24 bit A D offset and A D gain circuits on your module you must use a precision voltage standard such as the Krohn Hite Model 523 or equivalent ...

Страница 71: ...e the offset at different gain settings and at different frequencies When calibrating 0 V it is preferred that you connect a dead short wire to the channel rather than supplying 0 V through the voltage source 3 Ensure that you supply the correct voltage to the selected channel and then click OK The utility prompts you to connect various voltages to the channel to calibrate the gain at different ga...

Страница 72: ...ected channel The actual voltage is continuously returned in the AD Voltage text box Since this number is constantly changing a Running Average value is also displayed c If desired click the Reset button under the Running Average edit box to reset the running average d Once the Running Average value has settled adjust the offset by entering values in the Offset edit box or by clicking the up down ...

Страница 73: ...t until the gain values are calibrated for each gain setting 5 Repeat steps 2 to 4 for the remaining frequency until the offset and gain values are calibrated for each frequency for the selected channel 6 Repeat steps 1 to 5 for the remaining A D channels that you want to calibrate Note At any time you can click Restore Factory Settings to reset the A D calibration values to their original factory...

Страница 74: ...Chapter 7 74 ...

Страница 75: ...75 8 Troubleshooting General Checklist 76 Technical Support 78 If Your Module Needs Factory Service 79 ...

Страница 76: ... the problem If you cannot identify the problem refer to page 76 Table 21 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 unknown devices showing a yellow question mark Then run the setup program on your OMNI CD...

Страница 77: ...onnected to the channel being read Check the transducer connections The module is set up for differential inputs while the transducers are wired as single ended inputs or vice versa Check your wiring and ensure that what you specify in software matches your hardware configuration the A D configuration should be differential Computer does not boot The power supply of the computer is too small to ha...

Страница 78: ...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 79: ...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 80: ...Chapter 8 80 ...

Страница 81: ...81 A Specifications Analog Input Specifications 82 Digital I O Specifications 88 Power Physical and Environmental Specifications 89 Regulatory Specifications 90 Connector Specifications 91 ...

Страница 82: ...ccuracy 10 Hz full scale 10 V Gain 1 Gain 8 Gain 16 Gain 32 0 001 0 002 0 003 0 005 System accuracy 100 Hz full scale 10 V Gain 1 Gain 8 Gain 16 Gain 32 0 001 0 002 0 003 0 006 System accuracy 1200 Hz full scale 10 V Gain 1 Gain 8 Gain 16 Gain 32 0 001 0 002 0 004 0 007 System accuracy 4800 Hz full scale 10 V Gain 1 Gain 8 Gain 16 Gain 32 0 001 0 003 0 005 0 010 Nonlinearity integral Gain 1 Gain 1...

Страница 83: ...offset 10 μV Effective number of bits ENOB 10 Hz with a 1 Hz 9 9 V sine wave input 21 bits typical Channel crosstalk 150 dB 1 kHz Input coupling DC Isolation voltage 500 V to computer ground Channel to channel isolation 500 V ESD protection Arc Contact 8 kV 4 kV Internal reference 1 25 V 0 001 V 3 dB point low pass a Sample rate less than or equal to 600 Samples s Sample greater than 600 Samples s...

Страница 84: ...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 32 Figure 18 shows this data in graphical form Table 23 DT9824 System Noise Gain 10 Samples s 100 Samples s 960 Samples s 4800 Samples s 1 3 6 μVrms 12 0 μVrms 25 0 μVrms 63 0 μVrms 8 0 7 μVrms 2 0 μVrms 4 2 μVrms 11 0 μVrms 16 0 6 μVrms 1 8 μVrms 2 8 μVrms 7 5 μVrms 32 0 4 μVrms ...

Страница 85: ...ulti order Sinc filter and a digital low pass filter decimator The filter response has a gentle rolloff from DC with a 3 dB signal bandwidth that is determined by the user selected sampling rate shown in Table 24 Table 24 3 dB Bandwidth Sampling Frequency 3 dB Bandwidth Point Less than or equal to 600 Samples s 0 24 x sample rate Greater than 600 Samples s 0 23 x sample rate 0 0 10 0 20 0 30 0 40 ...

Страница 86: ...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 The correction factor depends on the input frequency of the signal you are trying to measure and the sampling rate of the DT9824 Table 25 shows the gain correction factors for typical input frequenc...

Страница 87: ...es s 600 Samples s 960 Samples s 1600 Samples s 4800 Samples s DC 1 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 2 1 257 1 035 1 006 1 002 1 000 1 000 1 000 1 000 10 3 456 1 168 1 056 1 001 1 001 1 000 1 000 50 1 038 1 017 1 006 1 001 60 1 055 1 024 1 008 1 001 100 1 167 1 068 1 023 1 003 200 2 087 1 304 1 095 1 011 500 6 040 1 791 1 073 1000 1 325 2000 3 158 ...

Страница 88: ...put voltage High input current Low input current Termination DC 3 to 28 V 1 5 V 2 2 kΩ resistor to 1 2 V 2 2 kΩ resistor to 1 2 V Series 2 2 kΩ Outputs Output type Output driver High output Low output Breakdown voltage Contact impedance Solid state relay CMOS 30 V 0 4 V 400 mA 60 V 1 Ω Isolation voltage To computer ground Channel to channel 500 V 250 Va a Determined by the pin spacing in the 37 pi...

Страница 89: ...cifications Power 5 V Standby 5 V Enumeration 5 V Power ON Power Consumption 500 μA maximum 100 mA maximum 75 mA typical 500 mA maximum 420 mA typical 425 mA current draw Physical Dimensions Width Length Height Weight 8 380 inches 212 85 mm 9 319 inches 236 7 mm 1 720 inches 43 69 mm 31 ounces 880 g Environmental Operating temperature range Storage temperature range Relative humidity 0 C to 55 C 2...

Страница 90: ...rement 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 i...

Страница 91: ...nnector 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 Header Phoenix Contact 1803293 Plug Phoenix Contact 1803594 37 pin Digital I O connector Connector on module Mating connector 37 pin D AMP part 5747847 4 AMP Tyco part 5 747916 2 ...

Страница 92: ...Appendix A 92 ...

Страница 93: ...93 B Connector Pin Assignments and LED Status Indicators Analog Input Screw Terminals 94 Digital I O Connector 95 USB Connector 96 LED Status Indicators 97 ...

Страница 94: ...hannel 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 Screw Terminals Signal Description 1 Analog Input 2 Not Connected 3 Analog Input 4 Analog Ground 4 3 2 1 ...

Страница 95: ...gital Input 1 21 Digital Input 1 3 Digital Input 2 22 Digital Input 2 4 Digital Input 3 23 Digital Input 3 5 Digital Input 4 24 Digital Input 4 6 Digital Input 5 25 Digital Input 5 7 Digital Input 6 26 Digital Input 6 8 Digital Input 7 27 Digital Input 7 9 Not Connected 28 Not Connected 10 Digital Output 0 29 Digital Output 0 11 Digital Output 1 30 Digital Output 1 12 Digital Output 2 31 Digital O...

Страница 96: ... 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 Pin Signal Description Pin Signal Description 1 USB 5 V 3 USB Data 2 USB Data 4 USB Ground 1 2 3 4 ...

Страница 97: ...dicators Each DT9824 module has a single bi color LED that indicates the status of the module as described in Table 33 Table 33 LED Status Indicators on the DT9824 Module Color of the LED Status Description Green Module is powered Blinking amber Module is acquiring data ...

Страница 98: ...Appendix B 98 ...

Страница 99: ...rograms 16 cables EP333 34 EP365 24 25 calibration 70 CGLDepth 61 channel list for analog input channels 49 for digital input port 50 channel type differential 61 single ended 61 channel gain list depth 61 channels analog input 49 digital I O 54 number of 61 clocks base frequency 65 internal 65 maximum external clock divider 65 maximum throughput 65 minimum external clock divider 65 minimum throug...

Страница 100: ...7 errors analog input 53 external clock divider maximum 65 minimum 65 external digital trigger 51 negative 64 positive 64 F factory service 79 features 14 FIFO input 51 formatting data 52 frequency base clock 65 internal A D clock 65 internal A D sample clock 65 internal C T clock 65 internal retrigger clock 60 G gain actual available 61 analog input 50 number of 61 programmable 61 H help 75 help ...

Страница 101: ...r clock frequency 60 returning modules to the factory 79 RMA 79 running the Quick DataAcq application 39 S scan 52 screw terminal assignments 33 screw terminal panel 17 34 SDK 16 service and support procedure 78 simultaneous start list 59 single channel analog input 49 single ended channels 61 single value operations 59 analog input 51 digital I O 55 size module 89 software supported 16 software t...

Страница 102: ... negative digital 64 external positive digital 64 software 51 64 troubleshooting procedure 76 service and support procedure 78 troubleshooting table 76 TTL trigger 51 U unpacking 23 USB cable 24 25 V Visual Basic for NET programs 16 Visual Basic programs 16 Visual C programs 16 Visual C programs 16 voltage ranges 50 62 number of 62 W wiring signals digital inputs 35 digital outputs 36 voltage inpu...

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