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DT9812, DT9813, and User`s Manual DT9814

1. Screw Screw Terminal Signal Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Analog Input CH23 16 Counter 0 Gate 36 Analog Input CH22 15 Ground 35 Analog Input CH21 14 DAC 1 34 Analog Input CH20 13 DAC 1 Return 33 Analog Input CH19 12 DAC 0 32 Analog Input CH18 11 DAC 0 Return 31 Analog Input CH17 10 2 5 V Reference 30 Analog Input CH16 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 Analog Input CH12 4 Analog Input CH3 24 Analog Input CH11 3 Analog Input CH2 23 Analog Input CH10 2 Analog Input CH1 22 Analog Input CH9 1 Analog Input CHO 21 Analog Input CH8 A A D subsystem specifications 124 aliasing 72 analog input calibrating 120 channel list 70 channels 69 conversion modes 73 data format 76 data transfer 75 error conditions 77 gain 71 ranges 71 resolution 69 sample clock sources 72 single ended operations 73 triggers 75 wiring 43 analog input features testing 56 58 analog output calibrating 122 channel list 79 channels 78 clock sources 80 conversion modes 80 81 data format 83 data transfer 82 error conditions 84 gain 79 ranges 79 resolution 78 Index single value operations 81 subsystem specifications 127 trigger 80 wiring 44 analog output fea
2. Data acquired continuously Figure 16 Continuous Scan Mode Principles of Operation Input Triggers A trigger is an event that occurs based on a specified set of conditions Acquisition starts when the module detects the initial trigger event and stops when the buffers on the queue have been filled or when you stop the operation Note that when you stop the operation the module completes the reading of the channel list The DT9812 DT9813 and DT9814 modules support the following trigger sources e 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 digital TTL trigger An external digital TTL trigger event occurs when the module detects a high to low negative transition on the Ext Trigger In signal connected to the module Using software specify an external negative digital TLL trigger Data Transfer 6 Before you begin acquiring data you must allocate buffers to hold the data A buffer done event is returned whenever a buffer is filled This allows you to move and or process the data as needed We recommend that you allocate a minimum of two buffers for a continuous analog input operation Data is written to multiple allocated input buffers continuously when no more empty buffers are available the operatio
3. Number of digital I O lines 16 8 in 8 out DT9812 8 4 in 4 out DT9813 Number of ports 2 8 bit DT9812 2 4 bit DT9813 Input termination No Logic family TTL Logic sense Positive true Inputs Input type Level sensitive Input logic load 1 TTL Load High input voltage 2 4 V min Low input voltage 0 8 V max Low input current 0 4 mA max Outputs High output 2 8 V min Low output 0 6 V max High output current source 2 mA Low output current sink 10 mA Software I O selectable No ESD protection per spec Arc 8 kV Contact 4kV 129 Appendix A Table 6 lists the specifications for the C T subsystem on the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 6 C T Subsystem Specifications 130 Feature Specifications Number of counter timers 1 Counter timer modes Event counting frequency measurement edge to edge measurement rate generation Resolution 32 bit Minimum pulse width 200 ns minimum amount of time it takes a C T to recognize an input pulse Logic family TTL Inputs Level sensitive Input logic load 1 TTL Load High input voltage 2 4 V min Low input voltage 0 8 V max Low input current 0 4 mA max Outputs High output 2 8 V min Low output 0 6 V max High output current source 2 mA Low output current sink 12 mA ESD protection per spec Arc 8kV Contact 4 kV
4. Specifications Table 6 C T Subsystem Specifications cont Feature Specifications Internal clock frequency 15 Hz to 12 MHz External clock divider 2 to 65536 a The resolution is 16 bits for rate generation operations Table 7 lists the specifications for the external A D trigger on the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 7 External Trigger Specifications Feature Specifications Input type Low level or falling edge sensitive Logic family TTL Inputs Level sensitive Input logic load 1 TTL Load High input voltage 2 4 V min Low input voltage 0 8 V max Low input current 0 4 mA max Minimum pulse width High 200 ns Low 200 ns Triggering modes Single scan Yes Continuous scan Yes 131 Appendix A 132 Table 8 lists the specifications for the external A D clock on the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 8 External Clock Specifications Input logic load Input termination High input voltage Low input voltage Low input current Feature Specifications Input type Rising edge sensitive Logic family TTL Inputs Level sensitive 1 TTL Load 2 4 V min 0 8 V max 0 4 mA max Oscillator frequency 40 kHz maximum Minimum pulse width High Low 200 ns 200 ns Specifications Table 9 lists the power physical and environm
5. Set the voltage supply on AD Cho to 0 V Click Start Auto Calibration A message appears notifying you to verify that 0 V is applied to AD Cho Check that the supplied voltage to AD Ch0 is OV and then click OK The offset value is calibrated When the offset calibration is complete a message appears notifying you to set the input voltage of AD Ch 0 to 9 375 V Check that the supplied voltage to AD Ch0 is 9 375V and then click OK The gain value is calibrated Click OK to finalize the analog input calibration process Calibration Note At any time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings Using the Manual Calibration Procedure If you want to manually calibrate the analog input circuitry instead of auto calibrating it do the following 1 Adjust the offset as follows a Verify that OV is applied to AD Ch0 and that A D Channel Select is set to Channel 0 The current voltage reading for this channel is displayed in the A D Value window b Adjust the offset by entering values between 0 and 63 in the Offset edit box or by clicking the up down buttons until the A D Value is 0 V 2 Adjustthe gain as follows a Verify that 9 375V is applied to AD Ch0 and that A D Channel Select is set to Channel 0 The current voltage reading for this channel is displayed in the A D Va
6. Testing Single Value Digital Output To verify that the module can output a single digital output value do the following 1 Connect a digital output to digital output line 0 of port B on the DT9812 or DT9813 module Refer to page 45 for an example of how to connect a digital output 2 Inthe Quick DataAcq application select Digital Output from the Control menu 3 Select the appropriateDT9812 or DT9813 module from the Board list box 4 Select digital output port B by clicking Port B 5 Clickthe 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 digital output line Optionally you can enter an output value in the Hex text box 6 ClickSend The application outputs and displays the value of each digital output line of digital port B on the screen in both text and graphical form 60 Verifying the Operation of a Module Testing Frequency Measurement To verify that the module can perform a frequency measurement operation do the following 1 Wire an external clock source to counter timer 0 on the DT9812 DT9813 or DT9814 module Refer to page 47 for an example of how to connect signals to a counter timer for a frequency measurement operation Note The Quick DataAcq application works only with counter timer 0 2 Inthe Q
7. L LabVIEW 18 LEDs 32 33 low edge gate type 107 LV Link 18 M MaxDifferentialChannels 99 MaxExtClockDivider 105 MaxFrequency 105 MaxMultiScanCount 98 MaxRetriggerFreq 98 MaxSingleEndedChannels 99 Index measuring frequency 91 measuring pulses 91 MinExtClockDivider 105 MinFrequency 105 MinRetriggerFreq 98 multiple channels analog input 70 analog output 79 N number of differential channels 99 gains 100 I O channels 99 resolutions 101 scans per trigger 98 single ended channels 99 voltage ranges 101 NumberOfChannels 99 NumberOfRanges 101 NumberOfResolutions 101 NumberOfSupportedGains 100 Nyquist Theorem 72 O online help 55 Open Layers Control Panel applet 25 113 operation modes continuous scan 73 single value analog input 73 single value analog output 81 single value digital I O 86 output channel list 79 clock sources 80 pulses 106 ranges 79 output pulses 52 62 outputting pulses 92 P period 92 period measurement 51 physical specifications 133 post trigger acquisition mode 97 power specifications 133 preparing to wire signals 39 pulse output 52 rate generation 92 testing 62 types 89 pulse width 51 89 92 Q Quick Data Acq 17 installing in Windows 2000 55 installing in Windows XP 55 running in Windows 2000 55 running in Windows XP 55 quickDAQ 17 R ranges analog input 71 analog output 79 number of 101 143 Index 144 rate generation 92 106 rec
8. described in Chapter 3 Standby mode is For some PCs you may need to disable enabled on your PC standby mode on your system for proper USB 2 0 operation Consult Microsoft for more information 113 Chapter 8 Technical Support If you have difficulty using a module Data Translation s Technical Support Department is available to provide technical assistance To request technical support go to our web site at http www datatranslation 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 telephone number of your nearest distributor 114 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 If you are located outside the USA call your local distributor for authorization and shipping instructions The name and telephone number of your nearest distributor are listed on our web
9. DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules and software and verify that your modules are working properly The second part of this manual describes the features of the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules the capabilities of the device driver and how to program the modules using the DT Open Layers for NET Class Library software Troubleshooting information is also provided Note For more information on the class library refer to the DT Open Layers for NET Class Library User s Manual If you are using the DataAcq SDK or a software application to program your device refer to the documentation for that software for more information If the information in this manual applies to both versions of the DT9812 module this manual uses the product name DT9812 module If the information applies to a specific module this manual uses the specific product name Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming the modules for data acquisition operations in the Microsoft Windows 2000 or Windows XP operating system It is assumed that you have some familiarity with data acquisition principles and that you understand your application 11 About this Manual 12 How this Manual is Organized This manual is organized as follows Chapter 1 Overview describes the major features of the DT981
10. Input Sample Clock Sources 22 222reeeeeen 72 Analog Input Conversion Modes 73 Single Value Operations 0000000 73 Continuous Scan Mode 73 Input rig gers 42 eech eed Eee C ie Re aei 75 Data Transfer 2213152 eo RR Re en 75 Data Format iie e Re ee 76 Converting a Binary Code to a Voltage 76 Converting a Twos Complement Code to a Voltage 77 Error Conditions ad 0 0 0 ce tin ri eee eee 77 Analog Output Features 78 Output Resolution 78 Analog Output Channel 78 Specifying a Single Analog Output Channel 78 Specifying Analog Output Channels 79 Output Ranges and Game n Output tp geri ci eese dem ehe at 80 Output Clock e RR eR DR RR ug 80 Output Conversion Modes sssssssssssss 80 Single Value Operation 81 Continuous Output Mode ssssss 81 Data Transfer soos do rn hee ade cele ee 82 Data Format nasse au ine 83 Converting a Voltage into a Binary Code 83 Converting a Voltage to a Twos Complement Code 84 Contents Error Conditions na aaa 84 Digital 1 O Features 85 Digital 1 0 Lines een e Rr RR RR 85 Resol tiOh eon er ae er iech 85 Operation Modes 86 Counter Timer Features 87 C T Channels u nn 87 C T Clock Sources 88 Gately pes unsre re degit ed 88 Pulse Duty Cycles 89 Counter Timer Operation Modes 90 Event Counting xe roe rte isn oi tants
11. or the amount of time between a rising edge and a falling edge or between a falling edge and a rising edge You can calculate the pulse width as follows Pulse width Number of counts 24 MHz Period The time between two occurrences of the same edge rising edge to rising edge or falling edge to falling edge You can calculate the period as follows Period 1 Frequency Period Number of counts 24 MHz Frequency The number of periods per second You can calculate the frequency as follows Frequency 24 MHz Number of Counts 51 Chapter 4 Rate Generation Figure 12 shows how to connect counter timer signals to the screw terminals of a module to perform a rate generation continuous pulse output operation in this example an external gate is used DT9812 DT9813 or Ground DT9814 Module Heater GES Controller o gt I U Counter 0 Out 4 ave a gt D 16 External Counter 0 Gating Gate Switch Ground Figure 12 Connecting Counter Timer Signals for a Rate Generation Operation Using an External Gate 52 Verifying the Operation of a Module Installing the Quick DataAcq Application 55 Running the Quick DataAcq Application 55 Testing Single Value Analog Input 56 Testing Single Value Analog Output 2 57 Testing Continuous Analog Input 58 Testin
12. 90 Frequency Measurement 00 eee eee 91 Edge to Edge Measurement 91 Rate Generation 00 0 c eee eee ee eee eee 92 Chapter 7 Supported Device Driver Capabilities 95 Data Flow and Operation Options 6 6 0 0 rs 97 Buffeting 2 ced oe ua na 98 Triggered Scan Mode 98 Data Encoding 666 6 99 Channels osses serari miat dd e dE SEN 99 Gail EE As 100 Ranges nee nee ee 101 Resolution a 4er usa nen en 101 Thermocouple Support 2 2eeeeeeeeeeeeeennnn 102 IEPE Support nissen eek 103 eer 104 Clock tren bie Seege tee 105 Counter Timers 0 0 0 0 n 106 Contents Chapter 8 Troubleshooting esses 109 General Checker 110 Technical Support i eser ete bats 114 If Your Module Needs Factory Service 115 Chapter 9 Caltbration cece eee eee 117 Using the DT9812 Series Calibration Utility 119 Calibrating the Analog Input Subsystem 120 Connecting a Precision Voltage Source 120 Using the Auto Calibration Procedure 120 Using the Manual Calibration Procedure 121 Calibrating the Analog Output Subsystem 122 Appendix A Specifications 0 20000 123 Appendix B Screw Terminal Assignments 135 ye qe 139 Contents 10 About this Manual The first part of this manual describes how to install and set up your
13. Analog Input CH6 27 Digital Input 6 6 Analog Input CH5 26 Digital Input 5 5 Analog Input CH4 25 Digital Input 4 4 Analog Input CH3 24 Digital Input 3 3 Analog Input CH2 23 Digital Input 2 2 Analog Input CH1 22 Digital Input 1 1 Analog Input CHO 21 Digital Input 0 a For the DT9812 2 5V module this reference is 2 44 V Screw Terminal Assignments Table 11 lists the screw terminals for the DT9813 10V module Table 11 DT9813 10V Screw Terminal Assignments Screw Screw Terminal Signal Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Input 3 16 Counter 0 Gate 36 Digital Input 2 15 Ground 35 Digital Input 1 14 DAC 1 34 Digital Input 0 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Reference 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 Analog Input CH12 4 Analog Input CH3 24 Analog Input CH11 3 Analog Input CH2 23 Analog Input CH10 2 Analog Input CH1 22 Analog Input CH9 1 Analog Input CHO 21 Analog Input CH8 137 Appendix B 138 Table 12 lists the screw terminals for the DT9814 10V module Table 12 DT9814 10V Screw Terminal Assignments
14. Connecting Analog Output Signals 2 2 44 Connecting Digital I O Signals srece ae aa a 45 Connecting Counter Timer Signals 22 47 37 Chapter 4 38 C Prepare to Use a Module see Chapter 2 starting on page 23 Newt Set Up and Install the Module see Chapter 3 starting on page 29 Wire Signals to the Module this chapter 1 Verify the Operation of the Module see Chapter 5 starting on page 53 Wiring Signals to the Module Preparing to Wire Signals CAUTION To avoid electrostatic sensitivity unplug your DT9812 DT9813 or DT9814 module from the computer before wiring signals This section provides information about wiring signals to a DT9812 2 5V DT9812 10V DT9813 10V or DT9814 10V module Wiring Recommendations Keep the following recommendations in mind when wiring signals to an ECONseries module e Use individually shielded twisted pair wire size 16 to 26 AWG in highly noisy electrical environments Separate power and signal lines by using physically different wiring paths or conduits To avoid noise do not locate the box 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 Prevent electrostatic discharge to the I O while the box is operational Connect all unused
15. Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Internal Clock Support SupportsinternalClock Yes Yes Yes External Clock Support SupportsExternalClock Yes Yes Simultaneous Input Output on a Single Clock Signal SupportsSimultaneousClocking Yes Base Clock Frequency BaseClockFrequency 24 MHz 24 MHz 0 0 24 MHz 0 Maximum Clock Divider MaxExtClockDivider 1 1 1 1 65536 JO Minimum Clock Divider MinExtClockDivider 1 1 1 1 2 0 Maximum Frequency MaxFrequency 50kHz 50kHz 0 0 12 MHz 0 Minimum Frequency MinFrequency 30Hz 30Hz 0 0 15Hz 0 105 Chapter 7 106 Counter Timers Table 22 DT9812 DT9813 and DT9814 Series Counter Timer Options DT9812 DT9813 and DT9814 Series Cascading Support SupportsCascading A D D A DIN DOUT C T QUAD Event Count Mode Support SupportsCount Yes Generate Rate Mode Support SupportsRateGenerate One Shot Mode Support SupportsOneShot Yes Repetitive One Shot Mode Support SupportsOneShotRepeat Up Down Counting Mode Support SupportsUpDown Edge to Edge Measurement Mode Support SupportsMeasure Yes Continuous Edge to Edge Measurement Mode Support SupportsContinuousMeasure High to Low Output Pulse Support SupportsHighToLowPulse Yes Low to High Output Pulse Support SupportsLowToHighPulse Variable Pulse Width Support SupportsVa
16. Support SupportsWrapSingle Yes Inprocess Buffer Flush Support Yes SupportsinProcessFlush Table 12 DT9812 DT9813 and DT9814 Series Triggered Scan Mode Options DT9812 DT9813 and DT9814 Series Triggered Scan Support SupportsTriggeredScan A D D A DIN DOUT C T QUAD Maximum Number of CGL Scans per Trigger MaxMultiScanCount Maximum Retrigger Frequency MaxRetriggerFreq Minimum Retrigger Frequency MinRetriggerFreq 98 Supported Device Driver Capabilities Data Encoding Table 13 DT9812 DT9813 and DT9814 Series Data Encoding Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Binary Encoding Support SupportsBinaryEncoding Yes Yes Yes Yes Yes Twos Complement Support SupportsTwosCompEncoding Yes Yes a The DT9812 10V DT9813 10V and DT9814 10V modules use twos complement encoding the DT9812 2 5V module uses binary encoding Channels Table 14 DT9812 DT9813 and DT9814 Series Channel Options Series Number of Channels NumberOfChannels DT9812 DT9813 and DT9814 A D D A DIN DOUT C T QUAD SE Support SupportsSingleEnded Yes Yes SE Channels MaxSingleEndedChannels DI Support SupportsDifferential Yes Yes Yes DI Channels MaxDifferentialChannels Maximum Channel Gain List Depth CGLDepth 99 Cha
17. generate a continuous pulse output signal from Counter 0 Out this mode is sometimes referred to as continuous pulse output or pulse train output 92 Principles of Operation The pulse output operation is enabled whenever the Counter 0 Gate signal is active high level low level or software gate While the pulse output operation is enabled the counter outputs a high to low going pulse with a pulse width of 50 continuously As soon as the operation is disabled rate generation stops The frequency of the output is determined by the C T clock source either internal or external and the clock divider used You can generate an output signal from Counter 0 Out with a frequency of 15 Hz to 12 MHz To specify rate generation mode use software to specify the counter timer mode as rate the C T clock source as either internal or external the clock divider 2 to 65536 and the active gate type high level or software gate Refer to page 88 for more information about gate types Make sure that the signals are wired appropriately Refer to Chapter 4 for an example of connecting a rate generation application 93 Chapter 6 94 Supported Device Driver Capabilities Data Flow and Operation Option 97 Oc noD ee ECT 98 Triggered Sen Mede ennee nern 98 U cepe repe ei Sie ee eters ele eee ayes 100 Gn ME 99 Baer PEE 101 c ro E 101 Thermocouple Support s eaer irae ree ber eee eth 102 TIEPE SD ORE M k
18. in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment tems that you select or type are shown in bold Related Information Refer to the following documents for more information on using the DT9812 DT9813 and DT9814 modules 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 DT Measure Foundry Getting Started Manual UM 19298 and online help These documents describe how to use DT Measure Foundry to build drag and drop test and measurement applications for Data Translation 9 data acquisition devices without programming e 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 13 About this Manual DataAcq SDK User s Manual UM 18326 For programmers who are developing their own application programs using the Microsoft C compiler this manual describes how to use the DT Open La
19. information about specifying the active gate type You can count a maximum of 4 294 967 296 events before the counter rolls over to 0 and starts counting again For event counting operations use software to specify the counter timer mode as count the C T clock source as external and the active gate type as software or high level Make sure that the signals are wired appropriately Refer to Chapter 4 for an example of connecting an event counting application 90 Principles of Operation Frequency Measurement Connect a pulse of a known duration to the Counter 0 Gate signal Specify the active gate in software high level or low level When the operation starts read the number of counts that occurred when the gate was active You can determine the frequency of the clock input signal using the following equation Frequency Measurement _Number of Events Measurement Period Make sure that the signals are wired appropriately Refer to Chapter 4 for an example of connecting a frequency measurement application Edge to Edge Measurement Use edge to edge measurement mode if you want to measure the time interval between a specified start edge and a specified stop edge The start edge can occur on the rising edge or the falling edge of the Counter 0 Gate signal and the stop edge can occur on the rising edge or the falling edge of the Counter 0 Gate signal When the start edge is detected the counter timer starts incre
20. 12 MHz External clock An external clock is useful when you want to pace counter timer operations at rates not available with the internal clock or if you want to pace at uneven intervals Connect an external clock with a maximum recommended frequency of 6 MHz to the Counter 0 In signal on the module Using software specify the C T clock source as external and specify a clock divider between 2 and 65536 to determine the actual frequency at which to pace the counter timer operation For example if you connect a 6 MHz external C T clock and use a clock divider of 2 the resulting C T output frequency is 3 MHz Counter timer operations start on the falling edge of the Counter 0 In signal Gate Types The edge or level of the Counter 0 Gate signal determines when a counter timer operation is enabled Using software you can specify one of the following gate types e None A software command enables any counter timer operation immediately after execution e Logic high level external gate input Enables a counter timer operation when Counter 0 Gate is high and disables a counter timer operation when Counter 0 Gate is low Note that this gate type is used for event counting and rate generation modes refer to page 90 for more information about these modes 88 Principles of Operation e Falling edge external gate input Enables a counter timer operation when a high to low transition is detected on the Counter 0 Gate sig
21. 2 4 Analog Input CH3 24 Analog Input CH11 3 Analog Input CH2 23 Analog Input CH10 2 Analog Input CH1 22 Analog Input CH9 1 Analog Input CHO 21 Analog Input CH8 Wiring Signals to the Module Connecting Analog Input Signals The DT9812 2 5V and DT9812 10V modules support 8 single ended analog input channels The DT9813 10V module supports 16 single ended analog input channels the DT9814 10V supports 24 Figure 4 shows how to connect single ended voltage input signals channels 0 and 1 in this case to the screw terminals of the module Analog Ground 9 Vsource 1 Analog In 1 Q2 D1 7 Analog In 0 DT9812 DT9813 or Vsource 0 DT9814 Module Signal Source Figure 4 Connecting Single Ended Inputs 43 Chapter 4 Connecting Analog Output Signals The DT9812 DT9813 and DT9814 modules support two analog output channels DACO and DAC1 Figure 5 shows how to connect an analog output voltage signal DACO in this case to one of these modules Load DACO DACO Return 12 Q 11 DT9812 DT9813 or DT9814 Module Figure 5 Connecting Analog Outputs to a Screw Terminal Panel Wiring Signals to the Module Connecting Digital I O Signals The DT9812 2 5V and DT9812 10V modules support eight fixed digital input lines and eight fixed digital output lines The DT9813 10V module supports four fixed digital input lines
22. 2 2 5V DT9812 10V DT9813 10V and DT9814 10V modules as well as the supported software and accessories for the modules Chapter 2 Preparing to Use a Module describes how to unpack the module check the system requirements and install the software Chapter 3 Setting Up and Installing the Module describes how to install the module and how to configure the device driver Chapter 4 Wiring Signals to the Module describes how to wire signals to the module Chapter 5 Verifying the Operation of a Module describes how to verify the operation of the module with the Quick DataAcq application Chapter 6 Principles of Operation describes all of the features of the modules and how to use them in your application Chapter 7 Supported Device Driver Capabilities lists the data acquisition subsystems and the associated features accessible using the device driver Chapter 8 Troubleshooting provides information that you can use to resolve problems with a module and device driver should they occur Chapter 9 Calibration describes how to calibrate the analog I O circuitry of the 10V modules Appendix A Specifications lists the specifications of the modules Appendix B Screw Terminal Assignments shows the screw terminal assignments of the modules About this Manual Anindex completes this manual Conventions Used in this Manual The following conventions are used
23. 3 or DT9814 module from the Board list box In the Channel list box select analog output channel 0 In the Range list box select the output range of DACO 0 to 2 44 V for the DT9812 2 5V and 10 V for the DT9812 10V DT9813 and DT9814 Enter an output value or use the slider to select a value to output from DACO Click Send to output a single value from DACO The application displays the output value on the screen in both text and graphical form 57 Chapter 5 Testing Continuous Analog Input 58 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 0 and 1 on the DT9812 DT9813 or DT9814 module using the single ended configuration Refer to page 43 for an example of how to connect a single ended analog input 2 Inthe Quick DataAcq application choose Scope from the Acquisition menu 3 Select the appropriate DT9812 DT9813 or DT9814 module from the Board list box 4 Inthe Sec Div list box select the number of seconds per division 1 to 00001 for the display 5 Inthe Channel list box select analog input channel 1 and then click Add to add the channel to the channel list Note that by default channel 0 is included in the channel list 6 Click Config from the Toolbar 7 Inthe Config dialog select ChannelType and then select Single Ende
24. 812 DT9813 or DT9814 module Using this application you can verify key features of the modules display data on the screen and save data to disk Refer to Chapter 5 for more information on using the Quick DataAcq application e The quickDAQ application An evaluation version of this NET application is included on the Data Acquisition OMNI CD quickDAQ lets you acquire analog data from all devices supported by DT Open Layers for NET software at high speed plot it during acquisition analyze it and or save it to disk for later analysis 17 Chapter 1 18 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 DT9812 DT9813 or DT9814 Series 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 Visual Studio 6 0 and Microsoft C or C to develop your own application software for a DT9812 DT9813 or DT9814 Series module using Windows 2000 or Windows XP the DataAcq SDK complies with the DT Open Layers standard DTx EZ Use this optional software package if you want to use ActiveX controls to access the capabilities of your modules using Microsoft Visual Basic or Visual C DTx EZ complies with the DT Open Layers standard DAQ Adaptor for MATLAB Data Translation s DAQ Adaptor provides an interfac
25. 812 2 5V 1 0 to 2 44 V 2 0 to 1 22 V _ 4 0 to 0 610 V 8 0 to 0 305 V 16 0 to 0 1525 V DT9812 10V 1 10 V DT9813 10V 2 u 5 V DT9814 10V 4 _ 2 5V 8 1 25 V 71 Chapter 6 72 For each channel on the module choose the gain that has the smallest effective range that includes the signal you want to measure For example if you are using a DT9812 2 5V module and the range of your analog input signal is 0 to 1 05 V specify a range of 0 to 2 44 V for the module and use a gain of 2 for the channel the effective input range for this channel is then 0 to 1 22 V which provides the best sampling accuracy for that channel You can specify the gain in a single value operation or specify the gain for each entry in the channel list Input Sample Clock Sources You can use one of the following clock sources to pace an analog input operation Internal clock Using software specify the clock source as internal and the clock frequency at which to pace the operation The minimum frequency of the internal clock is 30 Hz the maximum frequency of the internal clock is 50 kHz According to sampling theory Nyquist Theorem specify a frequency that is at least twice as fast as the input s highest frequency component For example to accurately sample a 2 kHz signal specify a sampling frequency of at least 4 kHz Doing so avoids an error condition called aliasing in which high frequency input c
26. CJC Channel SupportsCJCSourceChannel Available CJC Channels SupportedCJCChannels 102 Supported Device Driver Capabilities IEPE Support Table 19 DT9812 DT9813 and DT9814 Series IEPE Support Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Software Programmable AC Coupling SupportsACCoupling Software Programmable DC Coupling SupportsDCCoupling Software Programmable External Excitation Current Source SupportsExternalExcitationCurrent Src Software Programmable Internal Excitation Current Source SupportsinternalExcitationCurrentSrc Available Excitation Current Source Values SupportedExcitationCurrentValues 103 Chapter 7 Triggers Table 20 DT9812 DT9813 and DT9814 Series Trigger Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Software Trigger Support SupportsSoftwareTrigger Yes Yes Yes External Positive TTL Trigger Support SupportsPosExternalTTLTrigger Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes Positive Threshold Trigger Support SupportsPosThresholdTrigger Negative Threshold Trigger Support SupportsNegThresholdTrigger Digital Event Trigger Support SupportsDigitalEventTrigger 104 Supported Device Driver Capabilities Clocks Table 21 DT9812 DT9813 and DT9814 Series Clock
27. Computer DT9812 DT9813 or DT9814 Module USB Cable Power Supply for Hub DT9812 DT9813 or DT9814 Module DT9812 DT9813 or DT9814 Module USB Cables pem LL D TT USB Cable L A d Expansion Hubs i Power Supply for Hub DT9812 DT9813 or DT9814 Module USB Cables Figure 3 Attaching Multiple DT9812 DT9813 and or DT9814 Modules Using Expansion Hubs 34 Setting Up and Installing the Module Changing the Name of a Module Optional To change the name of a module configure the device driver as follows 1 From the Windows Start menu select Settings Control Panel 2 From the Control Panel double click Open Layers Control Panel The Data Acquisition Control Panel dialog box appears 3 Click the DT9812 DT9813 or DT9814 module that you want to rename and then click Edit Name 4 Enter anew name for the module and then click OK The name is used to identify the module in all subsequent applications 5 When you are finished configuring the module click Close 6 Repeatsteps3 to 5 for the other modules that you want to configure 7 Close the Data Acquisition Control Panel dialog box Continue with the instructions on wiring in Chapter 4 starting on page 37 35 Chapter 3 36 Wiring Signals to the Module Preparing to Wire Signal une ea 39 Connecting Analog Input ena 43
28. DATA TRANSLATION UM 20769 G DT9812 DT9813 and DT9814 User s Manual Seventh Edition October 2006 Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 508 481 3700 www datatranslation com Fax 508 481 8620 E mail info datx com Copyright 2006 by Data Translation Inc All rights reserved 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 No license is granted by implication or otherwise under any patent 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 Marlboro MA 01752 Data Translation is a registered trademark of Data Translation Inc DT Open Layers DT Open Layers for NET Class Library DataAcq SDK OMNI CD LV Link and DTx EZ are trademarks of Data Translation Inc All other brand and product names are trademarks or registered trademarks of their respective companies Radio and Tel
29. Specifying a Single Analog Output Channel The simplest way to output data from a single analog output channel is to use single value analog output mode specifying the analog output channel that you want to update refer to page 81 for more information about single value operations Principles of Operation You can also specify a single analog output channel using the output channel list described in the next section Specifying Analog Output Channels You can output data continuously from one or both analog output channels using the output channel list If you want to output data from one analog output channel continuously specify either 0 DACO or 1 DAC1 in the channel output list If you want to output data to both analog output channels continuously specify the output channel list in the following order 0 1 Then use software to specify the data flow mode as Continuous for the D A subsystem refer to page 80 for more information on continuous analog output operations Output Ranges and Gains For the DT9812 2 5V module a fixed output range of 0 to 2 44 V is provided For the DT9812 10V DT9813 10V and DT9814 10V a fixed output range of 10 V is provided Through software specify the range for the entire analog output oy subsystem 0 to 2 44 V for the DT9812 2 5 V module or 10 V for the DT9812 10V DT9813 10V and DT9814 10V modules and specify a gain of 1 for each channel 79 Chapter 6 80 Output T
30. T Open Layers for NET Class Library Note Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or DT Open Layers for NET Class Library User s Manual Supported Device Driver Capabilities Data Flow and Operation Options Table 10 DT9812 DT9813 and DT9814 Series Data Flow and Operation Options DT9812 DT9813 and DT9814 Series Single Value Operation Support SupportsSingleValue A D Yes D A Yes DIN Yes DOUT Yes C T Yes QUAD Continuous Operation Support SupportsContinuous Yes Yes Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before amp after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Yes Interrupt Support SupportsinterruptOnChange Output FIFO Size FifoSize 2k a A 2K FIFO is used by the D A subsystem a 1K FIFO is used by the A D subsystem 97 Chapter 7 Buffering Table 11 DT9812 DT9813 and DT9814 Series Buffering Options DT9812 DT9813 and DT9814 Triggered Scan Mode Series A D D A DIN DOUT C T QUAD Buffer Support SupportsBuffering Yes Yes Single Buffer Wrap Mode
31. V and DT9814 10V modules use twos complement encoding In software you need to supply a code that corresponds to the analog output value you want the module to output Converting a Voltage into a Binary Code To convert a voltage into a binary code on the DT9812 2 5V module use the following formula Code Voltage 2 44 40 ne 6 e 2 44 is the full scale range of the module 0 to 2 44V e 4096 is the resolution 12 bits Voltage is the analog output voltage e Code is the raw count used by the software to represent the voltage in binary notation For example if you want to output a voltage of 2 0 V determine the code value as follows Code 2 0 2 44 4096 3357 83 Chapter 6 Converting a Voltage to a Twos Complement Code To convert a voltage into a twos complement code on the DT9812 10V DT9813 10V or DT9814 10V module use the following formula Code Voltage 20 40 where e 20 is the full scale range of the module 10V to 10V e 4096 is the resolution 12 bits e Voltage is the analog output voltage Code is the raw count used by the software to represent the voltage in binary notation For example if you want to output a voltage of 5 V determine the code as follows Code 5 20 4096 1024 Error Conditions The modules can report an underrun error if the data for the analog output channels is not sent fast enough from the host computer It is up to the host applic
32. alline Oe BON WATE ee ed ERE Ee REIR Eres 26 23 Chapter 2 Prepare to Use the Module this chapter Set Up and Install the Module see Chapter 3 starting on page 29 Wire Signals to the Module see Chapter 4 starting on page 37 Verify the Operation of the Module see Chapter 5 starting on page 53 Unpacking 24 Open the shipping box and verify that the following items are present e DT9812 2 5V DT9812 10V DT9813 10V or DT9814 10V module e OMNI CD USB cable 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 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 Once you have unpacked your module check the system requirements as described in the next section Preparing to Use a Module Checking the System Requirements For reliable operation your DT9812 DT9813 and DT9814 modules require the following Windows 2000 or Windows XP Professional Edition operating system For USB Ver 2 0 support make sure that you install Service Pack 2 for Windows XP or Service Pack 4 for Windows 2000 In addition for some systems you may have to disable standby mode If you are not sure whet
33. analog input channels to analog ground Wiring Locations You wire signals to each module using the screw terminals on the module Table 5 lists the screw terminal assignments for the DT9812 modules Table 6 the DT9813 module Table 7 the DT9814 module 39 Chapter 4 40 Table 5 DT9812 2 5V and DT9812 10V Screw Terminal Assignments Screw Screw Terminal Signal Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Output 7 16 Counter 0 Gate 36 Digital Output 6 15 Ground 35 Digital Output 5 14 DAC 1 34 Digital Output 4 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Reference 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Digital Input 7 7 Analog Input CH6 27 Digital Input 6 6 Analog Input CH5 26 Digital Input 5 5 Analog Input CH4 25 Digital Input 4 4 Analog Input CH3 24 Digital Input 3 3 Analog Input CH2 23 Digital Input 2 2 Analog Input CH1 22 Digital Input 1 1 Analog Input CHO 21 Digital Input 0 a For the DT9812 10V module this reference is 2 5 V For the DT9812 2 5V module this reference is 2 44 V Wiring Signals to the Module Table 6 DT9813 10V Screw Terminal Assignments Screw Screw Terminal Signal Termi
34. and four fixed digital output lines Figure 6 shows how to connect digital input signals lines 0 and 1 in this case to the screw terminals of a DT9812 2 5V or DT9812 10V module Ground 29 D 22 Digital Input 1 ZC 21 p Digital Input 0 TTL Inputs DT9812 2 5V or DT9812 10V Module Figure 6 Connecting Digital Inputs For a DT9813 10V module connect digital input lines 0 and 1 to screw terminals 34 and 35 respectively 45 Chapter 4 Figure 7 shows how to connect digital output signals line 0 in this case to the screw terminals of a DT9812 2 5V DT9812 10V or DT9813 10V module 38 Ground Out LED On 30 Q bes Digital Output 0 500 Q IK DT9812 Series or DT9813 Module Figure 7 Connecting Digital Outputs Note The DT9813 10V module has only four digital output lines at screw terminals 30 through 33 46 Wiring Signals to the Module Connecting Counter Timer Signals The DT9812 DT9813 and DT9814 modules provide one counter timer that you can use for the following operations Event counting Frequency measurement Edge to edge measurement Continuous pulse output rate generation This section describes how to connect counter timer signals for these operation modes Refer to Chapter 6 for more information about using the counter timers Event Counting Figure 8 shows how to connect counter timer signals to the screw t
35. ation to handle this error either by ignoring it or by stopping the output operation To avoid this error try slowing down the clock rate increasing the output buffer size or allocating more output buffers Note If no new data is available to be output by the analog output channels the last value that was written to the analog output channels continues to be output 84 Principles of Operation Digital O Features This section describes the following features of digital I O operations Digital I O lines Resolution Operation modes Digital I O Lines The DT9812 2 5V and DT9812 10V modules provide 8 dedicated digital input lines and 8 dedicated digital output lines The DT9813 10V module provides 4 dedicated digital input lines and 4 dedicated digital output lines Using DT Open Layers you can specify the digital line that you want to read or write in a single value digital I O operation Refer to page 86 for more information about single value operations A digital line is high if its value is 1 a digital line is low if its value is 0 On power up or reset a low value 0 is output from each of the digital output lines Resolution The resolution of the digital ports on the DT9812 2 5V and DT9812 10V modules is fixed at 8 bits The resolution of the digital ports on the DT9813 10V module is fixed at 4 bits 85 Chapter 6 Operation Modes The DT9812 and DT9813 modules support single value di
36. channels described below Input ranges and gains described on page 71 Input sample clock sources described on page 72 Analog input conversion modes described on page 73 Input triggers described on page 75 Data format and transfer described on page 76 Error conditions described on page 77 Input Resolution The DT9812 DT9813 and DT9814 modules provide a resolution of 12 bits Note that the resolution is fixed you cannot program it in Analog Input Channels The DT9812 2 5V and DT9812 10V modules provide eight single ended analog input channels The DT9813 10V modules provides 16 single ended analog inputs and the DT9814 10V modules provide 24 single ended analog input channels The modules can acquire data from a single analog input channel or from a group of analog input channels The following subsections describe how to specify the channels 69 Chapter 6 Specifying a Single Analog Input Channel The simplest way to acquire data from a single analog input channel is to specify the channel for a single value analog input operation using software refer to page 73 for more information about single value operations You can also specify a single channel using the analog input channel list described in the next section Specifying One or More Analog Input Channels You can read data from one or more analog input channels using an analog input channel list You can group the channels in the list sequen
37. ching Modules to the Computer This section describes how to attach a module to the host computer Note Most computers have several USB ports that allow direct connection to USB devices If your application requires more modules than you have USB ports for you can expand the number of USB devices attached to a single USB port by using expansion hubs For more information refer to page 33 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 You must install the device driver before connecting your module to the host computer See Installing the Software on page 26 Connecting Directly to the USB Ports To connect DT9812 DT9813 or DT9814 modules directly to the USB ports of your computer do the following 1 Attach one end of the USB cable to the USB port on the module 2 Attach the other end of the USB cable to one of the USB ports on the host computer as shown in Figure 2 The operating system automatically detects the USB module and starts the Found New Hardware wizard 31 Chapter 3 DT9812 2 5V DT9812 10V DT9813 10V or DT9814 10V Modules USB Ports Host Computer d USB Cable Figure 2 Attaching the Module to the Host Computer 3 Click Next and or Finish as require
38. d 8 Inthe Config dialog select Range and then select Unipolar for the DT9812 2 5V or Bipolar for the DT9812 10V DT9813 and DT9814 9 Fromthe Scope view double click the input range of the channel to change the input range of the module The display changes to reflect the selected range for all the analog input channels on the module 10 In the Trigger box select Auto to acquire data continuously from the specified channels or Manual to acquire a burst of data from the specified channels Verifying the Operation of a Module 11 Click Start from the Toolbar to start the continuous analog input operation The application displays the values acquired from each channel in a unique color on the oscilloscope view 12 Click Stop from the Toolbar to stop the operation 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 DT9812 or DT9813 module Refer to page 45 for an example of how to connect a digital input 2 In the Quick DataAcq application choose Digital Input from the Acquisition menu 3 Select the appropriate DT9812 or DT9813 module from the Board list box 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 screen in both text and graphical form 59 Chapter 5
39. d in the wizard If the module is attached correctly the LED on the module turns green 4 Repeat the steps to attach another module to the host computer if desired 32 Setting Up and Installing the Module Connecting to an Expansion Hub Expansion hubs are powered by their own external power supply Theoretically you can connect up to five expansion hubs to a USB port on the host computer However the practical number of DT9812 DT9813 and or DT9814 modules that you can connect to a single USB port depends on the throughput you want to achieve Each of the hubs supports up to four modules To connect multiple modules to an expansion hub do the following 1 Attach one end of the USB cable to the module and the other end of the USB cable to an expansion hub 2 Connect the power supply for the expansion hub to an external power supply 3 Connect the expansion hub to the USB port on the host computer using another USB cable The operating system automatically detects the USB device and starts the Found New Hardware wizard 4 Click Next and or Finish as required in the wizard If the module is attached correctly the LED on the module turns green 5 Repeat these steps until you have attached the number of expansion hubs up to five and modules up to four per hub that you require Refer to Figure 3 The operating system automatically detects the USB devices as they are installed 33 Chapter 3 Host
40. e between the MATLAB Data Acquisition DAQ subsystem from The MathWorks and Data Translation s DT Open Layers architecture DT Measure Foundry An evaluation version of this software is included or provided via a link on the OMNI CD DT Measure Foundry is drag and drop test and measurement application builder designed to give you top performance with ease of use development Order the full development version of this software package to develop your own application using real hardware LV Link An evaluation version of LV Link is included on the OMNI CD Use this software package if you want to use the LabVIEW graphical programming language to access the capabilities of your modules Overview Getting Started Procedure The flow diagram shown in Figure 1 illustrates the steps needed to get started using the modules This diagram is repeated in each chapter the shaded area in the diagram shows you where you are in the getting started procedure E Prepare to Use the Module see Chapter 2 starting on page 23 Set Up and Install the Module see Chapter 3 starting on page 29 Wire Signals to the Module see Chapter 4 starting on page 37 Verify the Operation of the Module see Chapter 5 starting on page 53 Figure 1 Getting Started Flow Diagram 19 Chapter 1 20 Part 1 Getting Started Preparing to Use a Module SO TRE EE 24 Checking the System Requirements sese een 25 Inst
41. ed any Read This First information to your manual and that you have used this information Check the OMNI CD for any README files and ensure that you have used the latest installation and configuration information available Check that your system meets the requirements stated in Chapter 2 Check that you have installed your hardware properly using the instructions in Chapter 3 Check that you have installed and configured the device driver properly using the instructions in Chapter 3 Check that you have wired your signals properly using the instructions in Chapter 4 Search the DT Knowledgebase in the Support section of the Data Translation web site at www datatranslation com for an answer to your problem Visit the product s page on the Data Translation web site for the latest tips white papers product documentation and software fixes If you still experience problems try using the information in Table 23 to isolate and solve the problem If you cannot identify the problem refer to page 111 Troubleshooting Table 23 Troubleshooting Problems Symptom Possible Cause Possible Solution Module is not You plugged the From the Control Panel gt System gt recognized module into your Hardware gt Device Manager uninstall computer before installing the device driver any unknown devices showing a yellow question mark Then run the setup program on your OMNI CD to install the USB device driv
42. els in a channel list When it receives a software trigger the module cycles through the channel list acquiring and converting the data for each entry in the list this process is defined as the scan The module then wraps to the start of the channel list and repeats the process continuously until either the allocated buffers are filled or until you stop the operation Refer to page 75 for more information about buffers 73 Chapter 6 74 The conversion rate is determined by the frequency of the internal sample clock refer to page 72 for more information about the internal sample clock The sample rate which is the rate at which a single entry in the channel list is sampled is determined by the frequency of the input sample clock divided by the number of entries in the channel list To select continuous scan mode use software to specify the data flow as Continuous Figure 16 illustrates continuous scan mode using a channel list with three entries channel 0 channel 1 and channel 2 In this example analog input data is acquired on each clock pulse of the input sample clock When it reaches the end of the channel list the module wraps to the beginning of the channel list and repeats this process Data is acquired continuously Input Sample Clock Initial trigger event occurs ChanO Chan2 ChanO Chan2 ChanO Chan2 ChanO Chan2 Chan 1 Chan 1 Chan 1 Chan 1 u
43. ental specifications for the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 9 Power Physical and Environmental Specifications DT9812 10V DT9813 10V Feature DT9812 2 5V DT9814 10V USB 5 V out pin 20 100 mA maximum Power 5 V Enumeration lt 100 mA lt 100 mA Operation lt 100 mA lt 175 mA Physical Dimensions board 100 mm L x 100 mm W x 15 5 mm H Dimensions box with screw terminals and feet 107 7 mm L x 100 mm W x 33 5 mm H Weight board 65 3 g Weight box with screw terminals and feet 138 4 9 Environmental Operating temperature range 0 to 55 C Storage temperature range 40 to 85 C Relative humidity to 95 non condensing 133 Appendix A 134 Screw Terminal Assignments 135 Appendix B 136 Table 10 lists the screw terminals for the DT9812 modules Table 10 DT9812 Screw Terminal Assignments Screw Screw Terminal Signal Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Output 7 16 Counter 0 Gate 36 Digital Output 6 15 Ground 35 Digital Output 5 14 DAC 1 34 Digital Output 4 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Reference 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Digital Input 7 7
44. epartment of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le Reglement sur le brouillage radio lectrique dict par le Minist re des Communications du Canada Table of Contents About this Manual sese 11 Intended Audience 0 c eect eens 11 How this Manual is Organized 0 000000048 12 Conventions Used in this Manual 22 222220 13 Related Intormaton 0c cece eee eens 13 Where To Get Help 14 Chapter 1 Overview lesen 15 Key Hardware Features 16 Channel Gain List ds Counter Timer Channel 17 Supported Software san cece eee 17 Getting Started Procedure 222222ennnennnnnen 19 Part 1 Getting Started 21 Chapter 2 Preparing to Use a Module 23 Unpacking sso ee eR ee Ree e eere RereR RE PV 24 Checking the System Requirements sssuuees 25 Installing the Software 26 Chapter 3 Setting Up and Installing the Module 29 Attaching Modules to the Computer 2 220 31 Connecting Directly to the USB Ports 31 Connecting to an Expansion Hub 33 Changing the Name of a Module Optional 35 Contents Chapter 4 Wiring Signals to the Module 37 Preparing to Wi
45. erminals on the module to perform an event counting operation using an external gate In this example the counter counts the number of rising edges that occur on the Counter 0 In signal when the Counter 0 Gate signal is in the active state as specified by software Refer to Counter Timer Features on page 87 for more information 47 Chapter 4 Ground Signal 19 Source num Counter 0 In Q 18 16 x Counter D External z 0 Gate Gating Switch x DT9812 DT9813 or OR ees DT9814 Module Ground Figure 8 Connecting Counter Timer Signals for an Event Counting Operation Using an External Gate Figure 9 shows how to connect counter timer signals to the screw terminals on the module to perform an event counting operation without using a gate also called a software gate The counter counts the number of rising edges that occur on the Counter 0 In signal Signal Source Ground Counter 0 In DT9812 DT9813 or DT9814 Module D 19 LL OD 18 Figure 9 Connecting Counter Timer Signals for an Event Counting 48 Operation Without Using a Gate Wiring Signals to the Module Frequency Measurement One way to measure frequency is to connect a pulse of a known duration to the Counter 0 Gate signal as shown in Figure 10 In this case the frequency of the Counter 0 In signal is the number of counts divided by the period of the si
46. ers and reconnect your USB module to the computer Module does not respond The module configuration is incorrect Check the configuration of your device driver see the instructions in Chapter 3 The module is damaged Contact Data Translation for technical support refer to page 114 Intermittent operation Loose connections or vibrations exist Check your wiring and tighten any loose connections or cushion vibration sources see the instructions in Chapter 4 The module is overheating Check environmental and ambient temperature consult the module s specifications on page 133 of this manual and the documentation provided by your computer manufacturer for more information Electrical noise exists Check your wiring and either provide better shielding or reroute unshielded wiring see the instructions in Chapter 4 111 Chapter 8 Table 23 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Device failure error reported The module cannot communicate with the Microsoft bus driver or a problem with the bus driver exists Check your cabling and wiring and tighten any loose connections see the instructions in Chapter 4 The module was removed while an operation was being performed Ensure that your module is properly connected see the instructions in Chapter 3 Data appears to be invalid An o
47. evision Interference This equipment has been tested and found to comply with CISPR EN55022 Class A and EN50082 1 CE requirements and also with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense 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 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 interference to radio television and other electronic devices Canadian Department of Communications Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian D
48. fective input ranges The DT9812 10V DT9813 10V and DT9814 10V modules have a full scale input range of 10 V and support gains of 1 2 4 and 8 to provide many effective input ranges Refer to page 71 for more information Resolution Table 17 DT9812 DT9813 and DT9814 Series Resolution Options Series Software Programmable Resolution SupportsSoftwareResolution DT9812 DT9813 and DT9814 A D D A DIN DOUT C T QUAD Number of Resolutions NumberOfResolutions 1a 4a 4b 19 1 0 Available Resolutions SupportedResolutions 12 12 8 or 4 Bor Af 32 a All modules support a fixed A D and D A resolution of 12 bits b The resolution of the digital input port port A is fixed at 8 bits or eight digital input lines for the DT9812 modules 4 bits for the DT9813 The resolution of the digital output port port A is fixed at 8 bits or eight digital output lines for the DT9812 modules 4 bits for the DT9813 101 Chapter 7 Thermocouple Support Table 18 DT9812 DT9813 and DT9814 Series Thermocouple Support Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Thermocouple Support SupportsThernocouple Voltage Converted to Temperature in Hardware SupportsTemperatureDatalnStream Supported Thermocouple Types ThermocoupleType Supports CJC Source Internally in Hardware SupportsCJCSourcelnternal Supports
49. g Single Value Digital Input 59 Testing Single Value Digital Output 22 60 Testing Frequency Measurement sd dear eee eee 61 Testing Pulse Outils nn anne ke en 62 53 Chapter 5 54 Prepare to Use a Module see Chapter 2 starting on page 23 Set Up and Ins tall the Module see Chapter 3 starting on page 29 Wire Signals to the Module see Chapter 4 starting on page 37 Verify the Operation of the Module this chapter Verifying the Operation of a Module Installing the Quick DataAcq Application The Quick DataAcq application is installed automatically when you install the driver software See Installing the Software on page 26 for more information Running the Quick DataAcq Application To run the Quick DataAcq application do the following 1 Ifyou have not already done so power up your computer and any attached peripherals 2 Click Start from the Task Bar 3 Browse 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 the system has trouble finding the help file navi
50. gate to C Program Files Data Translation Win32 dtdataacq hlp where C is the letter of your hard disk drive 55 Chapter 5 56 Testing Single Value Analog Input To verify that the module can read a single analog input value do the following 1 Connect a voltage source such as a function generator to analog input channel 0 single ended mode on the DT9812 DT9813 or DT9814 module Refer to page 43 for an example of how to connect a single ended analog input In the Quick DataAcq application choose Single Analog Input from the Acquisition menu Select the appropriate DT9812 DT9813 or DT9814 module from the Board list box In the Channel list box select analog input channel 0 In the Range list box select the range for the channel 0 to 2 44 V for the DT9812 2 5V and 10 V for the DT9812 10V DT9813 and DT9814 Select Single Ended Click Get to acquire a single value from analog input channel 0 The application displays the value on the screen in both text and graphical form Verifying the Operation of a Module Testing Single Value Analog Output To verify that the module can output a single analog output value do the following 1 Connect an oscilloscope or voltmeter to DACO on the module Refer to page 44 for an example of how to connect analog output signals In the Quick DataAcq application select Single Analog Output from the Control menu Select the appropriate DT9812 DT981
51. gital I O operations only For a single value operation use software to specify the digital I O port the gain is ignored Data is then read from or written to the digital lines associated with that port Single value operations stop automatically when finished you cannot stop a single value operation 86 Principles of Operation Counter Timer Features This section describes the following features of counter timer C T operations e C T channels described below e C T clock sources described on page 88 Gate types described on page 88 Pulse types and duty cycles described on page 89 e C T operation modes described on page 90 C T Channels The modules provide one 32 bit counter timer 16 bits in rate generation mode The counter accepts a C T clock input signal pulse input signal and gate input signal and outputs a pulse signal clock output signal as shown in Figure 17 C T Clock Input Signal i internal or external 39 Counter M Pulse Output Signal L Gate Input Signal software or external input Figure 17 Counter Timer Channel 87 Chapter 6 C T Clock Sources The following clock sources are available for the counter timers Internal clock Through software specify the clock source as internal and specify the frequency at which to pace the counter timer operation The frequency of the internal C T clock can range from 15 Hz to
52. gnal connected to the Counter 0 Gate input DT9812 DT9813 or DT9814 Module Ground Signal gt 19 Source Counter 0 In S Number of pulses counted during gate period gt 18 C gt D 16 Counter 0 Gate Known Signal Determines period Source for count Figure 10 Connecting Counter Timer Signals for a Frequency Measurement Operation Using an External Pulse 49 Chapter 4 Edge to Edge Measurement Figure 11 shows how to connect counter timer signals to the module to perform an edge to edge measurement operation on one signal source The counter measures the number of counts between the start edge in this case a rising edge on the Counter 0 Gate signal and the stop edge in this case another rising edge on the Counter 0 Gate signal You specify the start edge and the stop edge in software Refer to page 91 for more information DT9812 DT9813 or DT9814 Module Ground D 19 Signal Source Counter 0 Gate D 16 t 4 In this example the software returns the number of counts between the two rising edges Figure 11 Connecting Counter Timer Signals for an Edge to Edge Measurement Operation 50 Wiring Signals to the Module You can use edge to edge measurement to measure the following characteristics of a signal Pulse width The amount of time that a signal pulse is in a high or a low state
53. her you are using USB Ver 1 1 or Ver 2 0 run the Open Layers Control Panel applet described on page 31 One or more USB ports Ver 2 0 or Ver 1 1 USB Ver 2 0 is recommended for optimal performance One CD ROM drive Once you have verified that your system meets the system requirements install the software as described in the next section 25 Chapter 2 26 Installing the Software Note Even if you already have a previous DT9812 Series module and associated drivers installed you must install the latest driver software to support any DT9812 Series module you add to your system To install the software perform the following steps 1 Insert the Data Acquisition OMNI CD into your CD ROM or DVD drive The installation program should automatically start and the InstallShield Wizard should appear If the installation program does not automatically start double click Setup exe from the CD The InstallShield Wizard appears Click Install Drivers The installation screen appears Click Install now The InstallShield Wizard appears If your system already has the Microsoft NET Framework 1 1 software installed proceed to step 6 Otherwise the Framework installation begins and you must do the following a Click the radio button next to I agree to accept the license agreement and then click Install b After the components have been installed click OK to configure them c Without rem
54. imultaneousClocking 105 SupportsSimultaneousStart 97 Index SupportsSingleEnded 99 SupportsSingleValue 97 SupportsSoftwareTrigger 104 SupportsTwosCompEncoding 99 SupportsWrapSingle 98 system requirements 25 T technical support 114 throughput maximum 105 minimum 105 transferring data analog input 75 analog output 82 triggered scan number of scans per trigger 98 retrigger frequency 98 triggers analog input 75 external 75 external negative digital 104 external positive digital 104 software 75 80 104 specifications 131 troubleshooting procedure 110 service and support procedure 114 troubleshooting table 111 TTL trigger 75 twos complement data encoding 99 analog input 77 analog output 84 U units counter timer 87 unpacking 24 USB cable 31 33 V Visual Basic for NET programs 18 Visual Basic programs 18 Visual Cf programs 18 Visual C programs 18 voltage ranges 71 101 number of 101 W wiring signals analog inputs 43 analog outputs 44 digital inputs and outputs 45 edge to edge measurement 50 event counting 47 frequency measurement 49 methods 39 preparing 39 pulse output 52 recommendations 39 writing programs in C C 18 Visual Basic 18 Visual Basic NET 18 Visual Cf 18 Visual C 18 145 Index 146
55. linearity monotonic monotonic Input impedance Off channel 10 MQ 10 pf 10 MQ 10 pf On channel 10 MQ 100 pf 10 MQ 100 pf Input bias current 10 nA 10 nA Maximum input voltage without damage Power on 35 V 35 V Power off 20 V 20 V A D conversion time 8 us 8 us Channel acquisition time V2 LSB 20 us 20 us Sample and hold Aperture uncertainty 2ns 2ns Aperture delay 200 ns 200 ns Throughput 50 kHz 50 kHz ESD protection per spec Arc 8 kV 8 kV Contact 4 kV 4 kV Reference 2 44 V 2 5V Monotonicity Yes Yes 125 Appendix A 126 Table 3 A D Subsystem Specifications cont DT9812 10V DT9813 10V Feature DT9812 2 5V DT9814 10V Sample Clock Internal Yes Yes External Yes Yes Trigger Source Internal Yes Yes External Yes Yes A D Converter Noise 0 6 LSB rms 0 6 LSB rms Channel to Channel Offset 0 1 mV 0 1 mV Effective Number of Bits at 50 kHz with a 1 kHz sine wave 10 5 bits 10 5 bits Total Harmonic Distortion 70 db 1 kHz 70 db 1 kHz Channel Crosstalk 74 db 9 1 kHz 74 db 1 kHz Maximum A D Pacer Clock Single Analog Input Throughput 50 kHz 50 kHz Multiple Analog Input Throughput 50 kHz 50 kHz a Very high input impedance minimizes any source error Specifications Table 4 lists the specifications for the D A subsystem on the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 4 D A Subsystem S
56. lue window b Adjust the gain by entering values between 0 and 63 in the Gain edit box or by clicking the up down buttons until the A D Value is 9 3750 Note Atany time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings ER 121 Chapter 9 Calibrating the Analog Output Subsystem This section describes how to use the DT9812 Series Calibration Utility to calibrate the analog output subsystem of a 10V module To calibrate the analog output circuitry you need to connect an external precision voltmeter to analog output channels 0 and 1 of the module Do the following to calibrate the analog output circuitry 1 Select the D A Configuration tab of the DT9812 Series Calibration Utility Connect an external precision voltmeter to Analog Output 0 DAC Ch0 of the module Adjust the offset by entering values between 0 and 63 in the DAC 0 Offset edit box or by clicking the up down buttons until the voltmeter reads 0 V Connect an external precision voltmeter to Analog Output 1 DAC Ch1 of the module Adjust the offset by entering values between 0 and 63 in the DAC 1 Offset edit box or by clicking the up down buttons until the voltmeter reads 0 V Note Atany time you can click Restore Factory Settings to reset the D A calibration values to their original factory settings This process
57. menting and continues incrementing until the stop edge is detected The C T then stops incrementing until it is enabled to start another measurement When the operation is complete you can read the value of the counter You can count a maximum of 4 294 967 296 events before the counter rolls over to 0 and starts counting again 91 Chapter 6 You can use edge to edge measurement to measure the following characteristics of a signal Pulse width The amount of time that a signal pulse is in a high or a low state or the amount of time between a rising edge and a falling edge or between a falling edge and a rising edge You can calculate the pulse width as follows Pulse width Number of counts 24 MHz Period The time between two occurrences of the same edge rising edge to rising edge or falling edge to falling edge You can calculate the period as follows Period 1 Frequency Period Number of counts 24 MHz Frequency The number of periods per second You can calculate the frequency as follows Frequency 24 MHz Number of Counts Using software specify the counter timer mode as measure the C T clock source as internal the start edge as rising or falling gate and the stop edge as rising or falling gate Make sure that the signals are wired appropriately Refer to Chapter 4 for an example of connecting an edge to edge measurement application Rate Generation Use rate generation mode to
58. n stops The data is gap free 75 Chapter 6 Data Format The DT9812 2 5V module uses binary data encoding to represent unipolar input ranges while the DT9812 10V DT9813 10V and DT9814 10V modules use twos complement encoding to represent bipolar input ranges In software the analog input value is returned as a code To convert the code to voltage use the information in the following subsections Converting a Binary Code to a Voltage To convert a binary code into a voltage on the DT9812 2 5V module use the following formula Voltage 2 44 Code 4096 where e 2 44 is the full scale range of the module 0 to 2 44V e Code is the raw count used by the software to represent the voltage in binary notation 4096 is the input resolution 12 bits e Voltage is the analog voltage For example if the software returns a code of 3072 for the analog input operation determine the analog input voltage as follows Voltage 2 44 3072 4096 1 83 V 76 Principles of Operation Converting a Twos Complement Code to a Voltage To convert a twos complement code into a voltage on the DT9812 10V DT9813 10V or DT9814 10V module use the following formula Voltage 20 Code 4096 where e 20 is the full scale range of the module 10V to 10V e Code is the raw count used by the software to represent the voltage e 4096 is the input resolution 12 bits e Voltage is the analog voltage For e
59. nal In software this is called a low edge gate type Note that this gate type is used for edge to edge measurement mode refer to page 91 for more information about these modes Rising edge external gate input Enables a counter timer operation when a low to high transition is detected on the Counter 0 Gate signal In software this is called a high edge gate type Note that this gate type is used for edge to edge measurement operations refer to page 91 for more information about these modes Pulse Duty Cycles Counter timer output signals from the modules are high to low going signals The duty cycle or pulse width indicates the percentage of the total pulse output period that is active In rate generation mode the duty cycle is fixed at 5076 for the DT9812 DT9813 and DT9814 modules Figure 18 illustrates a high to low going output pulse with a duty cycle of 50 Total Pulse Period high pulse low pulse Active Pulse Width Figure 18 Example of a Pulse Output Signal with a 50 Duty Cycle High to Low Going 89 Chapter 6 Counter Timer Operation Modes The modules support the following counter timer operation modes e Event counting Frequency measurement Edge to edge measurement e Rate generation Event Counting Use event counting mode if you want to count the number of falling edges that occur on Counter 0 In when the gate is active high level gate or software gate Refer to page 88 for
60. nal trigger Set the clock frequency between 30 Hz and 50 kHz To stop a continuously paced analog output operation you can stop sending data to the module letting the module stop when it runs out of data or you can perform either an orderly stop or an abrupt stop using software In an orderly stop the module finishes outputting the data in the buffer then stops all subsequent triggers are ignored In an abrupt stop the module stops outputting samples immediately all subsequent triggers are ignored Data Transfer If you are using continuous output mode you specify whether to allocate and fill a single buffer WrapSingleBuffer is True or multiple buffers WrapSingleBuffer is False If you are using multiple buffers data is written from multiple output buffers continuously when no more buffers of data are available the continuous output operation stops This mode guarantees gap free data If you use a single buffer data is output continuously from the single buffer until you stop the operation A buffer done event is generated whenever the last value in a buffer is output This allows you to fill the buffer or provide a new buffer as needed 82 Principles of Operation Note An underrun error can result if your buffer size is too small if you do not allocate enough buffers or if your clock rate is too fast Data Format The DT9812 2 5V module uses binary data encoding while the DT9812 10V DT9813 10
61. nal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Digital Input 3 16 Counter 0 Gate 36 Digital Input 2 15 Ground 35 Digital Input 1 14 DAC 1 34 Digital Input 0 13 DAC 1 Return 33 Digital Output 3 12 DAC 0 32 Digital Output 2 11 DAC 0 Return 31 Digital Output 1 10 2 5 V Reference 30 Digital Output 0 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 Analog Input CH12 4 Analog Input CH3 24 Analog Input CH11 3 Analog Input CH2 23 Analog Input CH10 2 Analog Input CH1 22 Analog Input CH9 1 Analog Input CHO 21 Analog Input CH8 41 Chapter 4 42 Table 7 DT9814 10V Screw Terminal Assignments Screw Screw Terminal Signal Terminal Signal 20 USB 5 V Out 40 Ext Trigger 19 Ground 39 Ext Clock 18 Counter 0 In 38 Ground 17 Counter 0 Out 37 Analog Input CH23 16 Counter 0 Gate 36 Analog Input CH22 15 Ground 35 Analog Input CH21 14 DAC 1 34 Analog Input CH20 13 DAC 1 Return 33 Analog Input CH19 12 DAC 0 32 Analog Input CH18 11 DAC 0 Return 31 Analog Input CH17 10 2 5 V Reference 30 Analog Input CH16 9 Analog Ground 29 Ground 8 Analog Input CH7 28 Analog Input CH15 7 Analog Input CH6 27 Analog Input CH14 6 Analog Input CH5 26 Analog Input CH13 5 Analog Input CH4 25 Analog Input CH1
62. ommendations for wiring 39 requirements 25 resolution analog input 69 analog output 78 available 101 digital I O 85 number of 101 retrigger clock frequency 98 returning boards to the factory 115 RMA 115 running the Quick Data Acq application in Windows 2000 55 in Windows XP 55 S sample clock sources 72 sample rate 74 SDK 18 service and support procedure 114 simultaneous clocking 105 simultaneous start list 97 single buffer wrap mode 98 single channel analog input 70 analog output 78 single ended channels 99 number of 99 single value operations 97 analog input 73 analog output 81 digital I O 86 software trigger 75 80 104 specifications 123 analog input 124 analog output 127 clocks 132 counter timer 130 digital I O 129 environmental 133 physical 133 power 133 triggers 131 stopping an operation 82 SupportedGains 100 SupportedResolutions 101 SupportedVoltageRanges 101 SupportsBinaryEncoding 99 SupportsBuffering 98 SupportsContinuous 97 SupportsCount 106 SupportsDifferential 99 SupportsExternalClock 105 SupportsGateFalling 107 SupportsGateHighEdge 107 SupportsGateHighLevel 106 SupportsGateLowEdge 107 SupportsGateNone 106 SupportsGateRising 107 SupportsHighToLowPulse 106 SupportsInProcessFlush 98 SupportsInternalClock 105 SupportsInterrupt 107 SupportsMeasure 106 SupportsNegExternalTTLTrigger 104 SupportsPosExternalTTLTrigger 104 SupportsProgrammableGain 100 SupportsRateGenerate 106 SupportsS
63. omponents erroneously appear as lower frequencies after sampling External clock An external clock is useful when you want to pace acquisitions at rates not available with the internal clock or when you want to pace at uneven intervals The minimum frequency of the external clock can be less than 30 Hz the maximum frequency of the external clock is 40 kHz Connect an external clock to the Ext Clock In signal on the module Conversions start on the rising edge of the external clock input signal Principles of Operation Using software specify the clock source as external The clock frequency is always equal to the frequency of the external sample clock input signal that you connect to the module Analog Input Conversion Modes The DT9812 DT9813 and DT9814 modules support the following conversion modes Single value operations Continuous scan operations Single Value Operations Single value operations are the simplest to use Using software you specify the range gain and analog input channel The module acquires the data from the specified channel and returns the data immediately For a single value operation you cannot specify a clock source trigger source scan mode or buffer Single value operations stop automatically when finished you cannot stop a single value operation oy Continuous Scan Mode Use continuous scan mode if you want to accurately control the period between conversions of individual chann
64. operation Continuous Output Mode Use continuously paced analog output mode if you want to accurately control the period between D A conversions or write a waveform to one or more analog output channels Use software to configure the output channel list as described on page 78 Then allocate a buffer that contains the values to write to the analog output channels that are specified in the output channel list For example if your output channel list contains DACO and DAC1 specify your buffer as follows first value for DACO first value for DAC1 second value for DACO second value for DAC1 and so on When it receives the software trigger the module starts writing output values to the analog output channels specified in the output channel list The operation repeats continuously until no more buffers are on the subsystem queue or you stop the operation Refer to page 83 for more information about buffer modes Note Make sure that the host computer transfers data to the analog output channels fast enough so that they do not empty completely otherwise an underrun error results 81 Chapter 6 To select continuously paced analog output mode use software to specify the following parameters e Set the dataflow as Continuous Set WrapSingleBuffer to False to use multiple buffers a minimum of two buffers is recommended in this mode or to True to use a single buffer Set the trigger source as a software inter
65. oundry 18 26 DT LV Link 26 DT Open Layers for NET Class Library 18 DTx EZ 18 26 duty cycle 89 E edge type gate falling 107 gate rising 107 edge to edge measurement mode 91 106 wiring 50 environmental specifications 133 errors analog input 77 analog output 84 event counting 90 106 wiring 47 external clock 88 105 external clock divider maximum 105 minimum 105 external digital trigger 75 negative 104 positive 104 F factory service 115 141 Index 142 features 16 FifoSize 97 formatting data analog input 76 analog output 83 frequency base clock 105 external A D clock 73 internal A D clock 72 105 internal A D sample clock 105 internal C T clock 88 105 internal DAC clock 80 internal retrigger clock 98 output pulse 92 frequency measurement 49 51 61 91 G gain actual available 100 analog input 71 analog output 79 number of 100 programmable 100 gate type 88 high edge 107 high level 106 internal 106 low edge 107 gate falling edge type 107 gate rising edge type 107 generating pulses 92 H hardware features 16 help online 55 high edge gate type 107 high level gate type 106 hot swapping 31 I inprocess buffers 98 input channels 69 ranges 71 sample clock sources 72 installing the Quick Data Acq application in Windows 2000 55 in Windows XP 55 installing the software 26 internal clock 88 105 gate type 106 interrupt driven operations 107 interrupts 97
66. oving your Data Acquisition OMNI CD click Restart to restart your system When the system restarts the Windows Installer dialog box appears followed by the DT Open Layers InstallShield Wizard Preparing to Use a Module 6 Click Next The license agreement appears 7 Read the license agreement click the radio button next to I accept the terms in the license agreement and then click Next The Destination Folder dialog box appears 8 Change the default destination folder path if you wish by clicking Change and then click Next 9 Click Install The files are copied to the specified destination folder 10 Click Finish to complete the installation process 27 Chapter 2 28 3 Setting Up and Installing the Module Attaching Modules to the Computer Changing the Name of a Module Optional 29 Chapter 3 Prepare to Use the Module see Chapter 2 starting on page 23 Set Up and Install the Module this chapter Wire Signals to the Module see Chapter 4 starting on page 37 Verify the Operation of the Module see Chapter 5 starting on page 53 Note The DT9812 DT9813 and DT9814 modules are factory calibrated The DT9812 2 5V module requires no further adjustment If you want to recalibrate the DT9812 10V DT9813 10V or DT9814 10V module refer to instructions on page 117 30 Setting Up and Installing the Module Atta
67. pecifications DT9812 10V DT9813 10V Feature DT9812 2 5V DT9814 10V Number of waveform analog output channels 2 2 Resolution 12 bit 12 bit Data encoding Binary Twos Complement Nonlinearity 0 05 0 05 Differential nonlinearity LSB 1 LSB Inherent quantizing error 1 LSB 1 LSB Output range 0 to 2 44 V 10 V Error Zero 1 mV 4 mV Gain 0 1 0 2 Drift Zero bipolar 20 UV PC 100 uV C Gain 100 ppm 100 ppm Throughput Continuously paced analog output mode 50 kHz 50 kHz Current output 2 mA 2 mA Output impedance lt 200 Q lt 0 2 Q Capacitive driver capability 1000 pF minimum 1000 pF minimum 127 Appendix A 128 Table 4 D A Subsystem Specifications cont DT9812 10V DT9813 10V Feature DT9812 2 5V DT9814 10V Protection Short to ground Short to ground Power on voltage 0V 5 mV 0 V 10 mV Settling time to 0 01 of FSR 20 us 20 us Slew rate 2V us 2 V us Glitch energy 1 uV sec 1 uV sec ESD protection per spec Arc 8 kV 8 kV Contact 4 kV 4 kV Monotonicity Yes Yes Output Clock Internal Yes Yes External No No Trigger Source Internal Yes Yes External No No Specifications Table 5 lists the specifications for the DIN DOUT subsystems on the DT9812 2 5V DT9812 10V and DT9813 10V modules Table 5 DIN DOUT Subsystem Specifications Feature DT9812 2 5V DT9812 10V and DT9813 10V
68. pen connection exists Check your wiring and fix any open connections see the instructions in Chapter 4 A transducer is not connected to the channel being read Check the transducer connections see the instructions in Chapter 4 The transducer is set up for differential inputs while the module is wired for single ended inputs Check your wiring and ensure that your transducer connects to the single ended inputs of your module see the instructions in Chapter 4 The module is out of calibration The modules are calibrated at the factory The DT9812 2 5V does not require additional calibration If you want to readjust the calibration of a 10V module refer to the instructions starting on page 117 112 Troubleshooting Table 23 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Computer does The power supply of Check the power requirements of your not boot the computer is too system resources and if needed get a small to handle allthe larger power supply consult the module s system resources specifications on page 133 USB 2 0 is not Your operating Ensure that you load the appropriate recognized system does not have Windows Service Pack version 2 for the appropriate Windows XP or version 4 for Windows Service Pack 2000 If you are unsure of whether you installed are using USB 2 0 or USB 1 1 run the Open Layers Control Panel applet
69. ple Digital Module Inputs Outputs Range Rate UO DT9812 2 5V 8SE 2 0 to 50 kS s 8 in 8 out 2 44 V DT9812 10V 8SE 2 HOV 50kS s 8 in 8 out DT9813 10V 16 SE 2 HOV 50kS s 4 in 4 out DT9814 10V 24 SE 2 HOV 50kS s All modules provide the following features e 2 location output channel list You can update both DACs simultaneously at up to 50 kSamples s e 12 bit resolution e One 32 bit counter timer channel e Internal and external A D clock sources Internal and external A D trigger sources e No external power supply required 16 Overview Channel Gain List All modules support a 32 location channel gain list You can cycle Gs through the channel gain list using continuous scan mode or triggered scan mode Counter Timer Channel All modules support one 32 bit counter timer C T channel that performs event counting frequency measurement edge to edge measurement and rate generation continuous pulse output operations Supported Software The following software is available for use with the DT9812 DT9813 and DT9814 modules and is provided on the OMNI CD e Device Driver The DT9812 DT9813 or DT9814 Device Driver allows you to use these modules with any of the supported software packages or utilities Refer to Chapter 2 for more information on loading the device driver Quick DataAcq application The Quick DataAcq application provides a quick way to get up and running using a DT9
70. post trigger 97 scan operations 73 continuous analog output 81 97 continuous counter timer 97 continuous digital 1 0 97 Control Panel applet 25 113 conversion modes continuous scan mode 73 digital I O 86 single value analog input 73 single value analog output 81 conversion rate 74 counter timer channels 87 99 clock sources 88 105 connecting edge to edge signals 50 connecting event counting signals 47 connecting frequency measurement signals 49 connecting pulse output signals 52 edge to edge measurement mode 106 event counting 106 gate types 88 gate falling edge type 107 gate rising edge type 107 high edge gate type 107 high level gate type 106 Index high to low output pulse 106 internal gate type 106 interrupt driven operations 107 low edge gate type 107 rate generation mode 106 subsystem specifications 130 counting events 90 customer service 115 D D A see analog output 127 data encoding 76 99 binary 76 83 twos complement 77 84 data flow modes continuous C T 97 continuous digital input 97 continuous post trigger 97 single value 97 data format analog input 76 analog output 83 data transfer analog input 75 analog output 82 DataAcq SDK 18 device driver 17 configuring 35 installing 26 differential channels 99 digital I O lines 85 operation modes 86 resolution 85 subsystem specifications 129 wiring inputs 45 wiring outputs 45 digital I O features testing 59 60 digital trigger 75 DT Measure F
71. pter 7 100 Table 14 DT9812 DT9813 and DT9814 Series Channel Options cont DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Channel List Inhibit SupportsChannelListlnhibit Gain Table 15 DT9812 DT9813 and DT9814 Series Gain Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Programmable Gain Support SupportsProgrammableGain Yes Number of Gains NumberOfSupportedGains 4or5 1 1 0 Gains Available 1 2 4 SupportedGains 8 162 1 1 1 a The DT9812 2 5V module has a full scale input range of 0 to 2 44 V and supports gains of 1 2 4 8 and 16 to provide many effective input ranges The DT9812 10V DT9813 10V and DT9814 10V modules have a full scale input range of 10 V and support gains of 1 2 4 and 8 to provide many effective input ranges Refer to page 71 for more information Supported Device Driver Capabilities Ranges Table 16 DT9812 DT9813 and DT9814 Series Range Options DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD Number of Voltage Ranges NumberOfRanges 12 1 0 0 0 0 Available Ranges Oto 2 44 V 0 to 2 44 V SupportedVoltageRanges or 10 V Jor 10 V8 a The DT9812 2 5V module has a full scale input range of 0 to 2 44 V and supports gains of 1 2 4 8 and 16 to provide many ef
72. r er 103 joo ER 104 dio EE 105 Counter THINS o 2 2 20 LUDERE S ee EE 106 95 Chapter 7 96 The DT9812 DT9813 and DT9814 Series Device Driver provides support for the analog input A D analog output D A digital input DIN digital output DOUT and counter timer C T subsystems For information on how to configure the device driver refer to Chapter 3 Table 9 DT9812 DT9813 and DT9814 Series Subsystems DT9812 DT9813 and DT9814 Total Subsystems on Module 1 1 18 1b 1 Series A D D A DIN DOUT C T QUAD a The DIN subsystem contains eight digital input lines 0 to 7 on the DT9812 and four digital input lines 0 to 3 on the DT9813 There is no DIN subsystem on the DT9814 b The DOUT subsystem contains eight digital output lines 0 to 7 on the DT9812 and four digital output lines 0 to 3 on the DT9813 There is no DOUT subsystem on the DT9814 The tables in this chapter summarize the features available for use with the DT Open Layers for NET Class Library and the DT9812 DT9813 and DT9814 Series modules The DT Open Layers for NET Class Library provides properties that return support information for specified subsystem capabilities The first row in each table 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 D
73. r to Chapter 2 for more information on installing the device driver This chapter describes how to calibrate the analog input and output subsystems of the DT9812 10V DT9813 10V or DT9814 10V module using the DT9812 Series Calibration Utility Calibration Using the DT9812 Series Calibration Utility Start the DT9812 Series Calibration Utility as follows 1 From Windows Task Bar select Start Programs Data Translation Inc ECONseries Calibration DT9812 Series Calibration Utility The main menu appears 2 Select the module to calibrate and then click OK Once the DT9812 Series Calibration Utility is running you can calibrate the analog input circuitry either automatically or manually described on page 120 or the analog output circuitry of the module described on page 122 119 Chapter 9 120 Calibrating the Analog Input Subsystem This section describes how to use the DT9812 Series Calibration Utility to calibrate the analog input subsystem of a 10V module Connecting a Precision Voltage Source To calibrate the analog input circuitry you need to connect an external precision voltage source to Analog In 0 AD Ch0 of the module Using the Auto Calibration Procedure Auto calibration is the easiest to use and is the recommended calibration method To auto calibrate the analog input subsystem do the following 1 Select the A D Configuration tab of the DT9812 Series Calibration Utility
74. re Signals 2ceeeeeeeeeeen 39 Wiring Recommendations 0 00000008 39 Wiring Locations 39 Connecting Analog Input Signals 222222200 43 Connecting Analog Output Signals a n aaassasara raea 44 Connecting Digital I O Signals 000000048 45 Connecting Counter Timer Signals 2 47 Event C unting ses eret guerre RR eere ees 47 Frequency Measurement 0000 eect e eee eee 49 Edge to Edge Measurement 000000 00008 50 Rate Generation 002 cece eee cee ee eens 52 Chapter 5 Verifying the Operation of a Module 53 Installing the Quick DataAcq Application 55 Running the Quick DataAcq Application 55 Testing Single Value Analog Input 56 Testing Single Value Analog Output 2 2222 57 Testing Continuous Analog Input 005 58 Testing Single Value Digital Input 59 Testing Single Value Digital Output 60 Testing Frequency Measurement 61 Testing Pulse Output 62 Part 2 Using Your Module 63 Chapter 6 Principles of Operation 65 Analog Input Features 69 Input Resolution 222 0 0 en 69 Analog Input Channels 69 Specifying a Single Analog Input Channel 70 Contents Specifying One or More Analog Input Channels 70 Input Ranges and Gains 6 66 e cece eee eee 71
75. rence C T Out 0 From USB 32 Bit 16 Channel Multiplexer r Port Counter Timer T C T Gate 0 A D Ch15 lt t C TInO H A D Ch14 A D Clock jq External Clock W A D Chi3 External Trigger e 12 Bit A D je SE e Converter e me le p gt DOUTO B gt A D Ch2 Digital VO gt A D Chi 441 DIN3 gt A D Cho H ESD Protected to 4000 V 4 DINO Vv ESD Protected to 4000 V DAC 1 12 Bit D A DAC 0 Converter Input FIFO USB 2 0 Port Figure 14 Block Diagram of the DT9813 10V Module 67 Chapter 6 Figure 15 shows a block diagram of the DT9814 10V module Power gt 5V Supply R 4 2 5 V Reference C T Out 0 From USB 32 Bit 24 Channel Multiplexer p Port Counter Timer eee Te A D Ch23 4 C TInO gt A D Ch22 A D Clock jq External Clock A D Ch21 External Trigger gt 12 Bit A D e Converter gt e 3 gt A D Ch2 A D Chi gt A D Cho ESD Protected to 4000 V DAC 0 Converter Input FIFO USB 2 0 Port Figure 15 Block Diagram of the DT9814 10V Module 68 Principles of Operation Analog Input Features This section describes the following features of analog input A D operations on the DT9812 DT9813 and DT9814 modules Input resolution described below Analog input
76. riablePulseWidth No None internal Gate Type Support SupportsGateNone Yes High Level Gate Type Support SupportsGateHighLevel Yes Low Level Gate Type Support SupportsGateLowLevel Supported Device Driver Capabilities Table 22 DT9812 DT9813 and DT9814 Series Counter Timer Options cont DT9812 DT9813 and DT9814 Series A D D A DIN DOUT C T QUAD High Edge Gate Type Support SupportsGateHighEdge Yes Low Edge Gate Type Support SupportsGateLowEdge Yes Level Change Gate Type Support SupportsGateLevel Clock Falling Edge Type SupportsClockFalling Clock Rising Edge Type SupportsClockRising Gate Falling Edge Type SupportsGateFalling Yes Gate Rising Edge Type SupportsGateRising Yes Interrupt Driven Operations Supportsinterrupt Yes a The pulse width duty cycle if fixed at 50 when rate generation mode is used b Edge to edge measurement is supported on the gate signal only both rising and falling edges 107 Chapter 7 108 Troubleshooting entalten es 110 Technical Support nenne ee an 114 If Your Module Needs Factory Service sss 115 109 Chapter 8 110 General Checklist Should you experience problems using a DT9812 2 5V DT9812 10V DT9813 10V or DT9814 10V module do the following 1 Read all the documentation provided for your product Make sure that you have add
77. rigger A trigger is an event that occurs based on a specified set of conditions The modules support a software trigger for starting analog output operations Using a software trigger the module starts outputting data when it receives a software command Using software specify the trigger source for the D A subsystem as a software trigger Output Clock When in continuous output mode described on page 81 you can update both analog output channels simultaneously using the internal clock on the module Using software specify the clock source for the D A subsystem as internal and specify the frequency at which to update the analog output channels between 30 Hz to 50 kHz Note The output clock frequency that you specify is frequency at which both analog output channels are simultaneously updated Output Conversion Modes The DT9812 DT9813 and DT9814 modules support the following output conversion modes Single value output operations Continuous output operations Principles of Operation Single Value Operations Single value operations are the simplest to use but offer the least flexibility and efficiency Use software to specify the analog output channel and the value to output from the analog output channel Since a single value operation is not clocked you cannot specify a clock source trigger source or buffer Single value operations stop automatically when finished you cannot stop a single value
78. site www datatranslation com All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 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 components on the module Place ina secure shipping container Return the module to the following address making sure the RMA number is visible on the outside of the box Customer Service Dept Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 115 Chapter 8 116 Calibration Using the DT9812 Series Calibration Utility 119 Calibrating the Analog Input Subsystem 120 Calibrating the Analog Output Subsystem 122 117 Chapter 9 118 The DT9812 10V DT9813 10V and DT9814 10V 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 and analog output circuitry on the 10V modules every six months using the DT9812 Series Calibration Utility Notes The DT9812 2 5V module is calibrated at the factory and does not require further calibration Ensure that you installed the DT9812 DT9813 or DT9814 Device Driver prior to using the DT9812 Series Calibration Utility Refe
79. tially 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 channels in the order you want to sample them You can enter up to 32 entries in the channel list The channels are read in order from the first entry in the list to the last entry in the list Refer to page 73 for more information about the supported conversion modes The maximum rate at which the module can read the analog input channels is 50 kSamples s Therefore if you specify two analog input channels in the channel list the maximum sampling rate is 25 kSamples s for each channel Likewise if you specify 16 analog input channels in the channel list the maximum sampling rate is 3 125 kSamples s for each channel 70 Principles of Operation Input Ranges and Gains The DT9812 2 5V features an input range of 0 to 2 44 V while the DT9812 10V DT9813 10V and DT9814 10V modules feature an input range of 10 V Use software to specify the input range Note that this is the range for the entire analog input subsystem not the range per channel The modules support programmable gains to allow many more effective input ranges Table 8 lists the supported gains and effective input ranges for each module Table 8 Effective Input Range Unipolar Bipolar Module Gain Input Range Input Range DT9
80. tures testing 57 applet Open Layers Control Panel 25 113 application wiring analog inputs 43 analog outputs 44 digital inputs and outputs 45 edge to edge measurement 50 event counting 47 frequency measurement 49 pulse output 52 B base clock frequency 105 BaseClockFrequency 105 binary data encoding 99 analog input 76 analog output 83 buffers 98 inprocess flush 98 single wrap mode 98 C C C programs 18 C T see counter timer 130 cables USB 31 33 139 Index 140 calibrating the module analog input subsystem 120 analog output subsystem 122 running the calibration utility 119 CGLDepth 99 changing the name of a module 35 channel list for analog input channels 70 for analog output channels 79 channel type differential 99 single ended 99 channel gain list depth 99 channels analog input 69 analog output 78 counter timer 87 digital I O 85 number of 99 clock sources analog input 72 analog output 80 counter timer 88 clocks base frequency 105 external 105 internal 105 maximum external clock divider 105 maximum throughput 105 minimum external clock divider 105 minimum throughput 105 simultaneous 105 specifications 132 configuring the device driver 35 connecting a module 31 using an expansion hub 33 connecting signals analog inputs 43 analog outputs 44 digital inputs and outputs 45 edge to edge measurement 50 event counting 47 frequency measurement 49 pulse output 52 continuous analog input
81. uick DataAcq application choose Frequency Counter from the Acquisition menu 3 Select the appropriate DT9812 DT9813 or DT9814 module from the Board list box 4 Inthe Count Duration text box enter the number of seconds during which events will be counted 5 Click Start to start the frequency measurement operation The operation automatically stops after the number of seconds you specified has elapsed and the application displays the frequency on the Screen If you want to stop the frequency measurement operation when it is in progress click Stop 61 Chapter 5 62 Testing Pulse Output To verify that the module can perform a pulse output operation do the following 1 Connect a scope to counter timer 0 on the DT9812 DT9813 or DT9814 module Refer to page 48 for an example of how to connect a scope a pulse output to counter timer 0 Note The Quick DataAcq application works only with counter timer 0 In the Quick DataAcq application choose Pulse Generator from the Control menu Select the appropriate DT9812 DT9813 or DT9814 module from the Board list box Select Continuous to output a continuous pulse stream Select High to low to output a falling edge pulse the low portion of the total pulse output period is the active portion of the signal Click Start to generate the pulse s The application displays the results both in text and graphical form Click Stop to stop a continuous p
82. ulse output operation Part 2 Using Your Module Principles of Operation Analog Input Features 2 edd ae ea 69 Analog Output Features 22 2 nee ae es 78 Digital 1 O Featutes oicc riean bet nee en 85 Counter Timer Fertige sea een na 87 65 Chapter 6 Figure 13 shows a block diagram of the DT9812 2 5V and DT9812 10V modules Power gt 5V Supply 2 5 V Reference C T Out 0 From USB 32 Bit 8 Channel Multiplexer T i Port Cuma eo een Te A D Ch7 lt q CTT Int Hp A D Ch6 A D Clock ra External Clock p 9 A D Ch5 External Trigger A D Ch4 eT gt DOUT e Converter S JA A D Ch3 le p gt DOUTO gt A D Ch2 Digital yo gt A D Chi a JL DIN7 o gt A D Cho isl ESD Protected to 4000 V La DINO M DAC1 lt 12 Bit D A ESD Protected to 4000 V DAC 0 7 Converter lt USB 2 0 or 1 1 Input FIFO Port Note For the DT9812 10V module the reference is 2 5 V For the DT9812 2 5V module the reference is 2 44 V Figure 13 Block Diagram of the DT9812 2 5V and DT9812 10V Modules 66 Principles of Operation Figure 14 shows a block diagram of the DT9813 10V module Power gt 5V Supply R 4 2 5 V Refe
83. will undo any D A calibration settings Once you have finished this procedure the analog output circuitry is calibrated To close the DT9812 Series Calibration Utility click the close box in the upper right corner of the window 122 A Specifications 123 Appendix A 124 Table 3 lists the specifications for the A D subsystem on the DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules Table 3 A D Subsystem Specifications Feature DT9812 2 5V DT9812 10V DT9813 10V DT9814 10V Number of analog input channels 8 single ended 8 single ended 16 single ended 24 single ended Number of gains 5 1 2 4 8 16 4 1 2 4 8 Resolution 12 bit 12 bit Data encoding binary twos complement System accuracy to of FSR Averaged over 50 readings 0 0496 0 04 Gain 1 0 06 0 06 Gain 2 0 08 0 08 Gain 4 0 10 0 10 Gain 8 0 15 Gain 16 Input Range Gain 1 0 to 2 44 V 10 V Gain 2 0 to 1 22 V 5 V Gain 4 0 to 0 610 V 2 5 V Gain 8 0 to 0 305 V 1 25 V Gain 16 0 to 0 1525 V Nonlinearity 0 05 0 05 Differential nonlinearity 1 2 LSB 1 2 LSB Inherent quantizing error 1 LSB 1 LSB Specifications Table 3 A D Subsystem Specifications cont DT9812 10V DT9813 10V Feature DT9812 2 5V DT9814 10V Drift Zero 50 UV 100 uV Gain 100 ppm 100 ppm Differential
84. xample assume that the software returns a code of 1040 for the analog input value Determine the analog input voltage as follows Voltage 20 1040 4096 5 078 V Error Conditions 6 An overrun condition is reported if the A D sample clock rate is too fast This error is reported if anew A D sample clock pulse occurs while the ADC is busy performing a conversion from the previous A D sample clock pulse It is up to the host application to handle this error by either ignoring the error or stopping acquisition To avoid this error use a slower sampling rate or increase the buffer size and or number of buffers 77 Chapter 6 78 Analog Output Features This section describes the following features of analog output operations Output resolution described below Analog output channels described below Output ranges and gains described on page 79 Output trigger described on page 80 Output clock described on page 80 Data format and transfer described on page 83 Error conditions described on page 84 Output Resolution The modules provide a fixed output resolution of 12 bits Note that the resolution is fixed it cannot be programmed in software Analog Output Channels DT9812 DT9813 and DT9814 modules provide two analog output channels DACs The modules can output data from a single analog output channel or from both analog output channels The following subsections describe how to specify the channels
85. yers DataAcq SDK to access the capabilities of Data Translation data acquisition devices DTx EZ Getting Started Manual UM 15428 This manual describes how to use the ActiveX controls provided in DTx EZ to access the capabilities of Data Translation data acquisition devices in Microsoft Visual Basic or Visual C DAQ Adaptor for MATLAB UM 22024 This document describes how to use Data Translation s DAO Adaptor to provide an interface between the MATLAB Data Acquisition subsystem from The MathWorks and Data Translation s DT Open Layers architecture Microsoft Windows 2000 or Windows XP documentation USB web site http ww w usb org Where To Get Help 14 Should you run into problems installing or using a 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 Overview Key Hardware Features u nn ea 16 Supported Sofaen een 17 19 Getting Started Procedure 15 Chapter 1 Key Hardware Features The DT9812 2 5V DT9812 10V DT9813 10V and DT9814 10V modules are economy multifunction mini instruments Table 1 lists the key features of each module Table 1 Key Features of the DT9812 DT9813 and DT9814 Modules Analog Analog UO Sam

DT9812, DT9813, and User`s Manual DT9814

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