National Instruments NI USB-9237 User's Manual
Contents
1. Gain drifts teme 10 ppm C max Offset drift 2 5 V excitation 0 6 u V V per C 3 3 V excitation 0 5 u V V per C 5 V excitation ee 0 3 u V V per C 10 V excitation eene 0 2 mV V per C Channel to channel matching calibrated 4 Gain Phase Input Signal Frequency fi Typical Maximum Maximum 0 to 1 kHz 0 1596 0 396 0 125 KHz fin 1 to 20 kHz 0 4 1 1 fin is in kHz Phase nonlinerarity Oto T KHz ce ee 0 001 0 to 20 KE Zs sette x 0 1 Input delay 4 2 tee 4 8 us 38 4 f Passband Erequ ncy ep EE 0 45 f Elatnes esf 0 1 dB max National Instruments Corporation 17 NI USB 9237 User Guide and Specifications Stopband Frequency nere ete 0 55 f Rejection i n 100 dB Alias free bandwidth 0 45 f Oversample rate esses 64 f Rejection at oversample rate 50 KS S eret 90 dB 3 2 MHz IO RS S t eitis 60 dB 640 kHz Common mode voltage All signals to earth ground 60 VDC Common mode rejection ratio CMRR Relative to earth ground 140 dB 0 to 60 Hz Relative to EX eese 85 dB 0 to 1 kH Input noise Density Total Excitation nV V s per 50 kS S 0 to 1 kHz Voltage J1HZz UL V V cms nV V ims 2 5N 8 1 3 250 3 3 V 6 1 0 190 5V 4 0 6 130 10 V 2 0 3 65 Spurious free d2. eeeeeeeee 60 VDC Measurement Category I Withstand sessss 1 000 Vms verified by a5 s dielectric withstand test Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage MAINS is a hazardous live electrical supply system that powers equipment This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Do not connect the NI USB 9237 to signals or use for measurements within Measurement Categories II IIL or IV Safety Standards The NI USB 9237 is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e EC 61010 1 EN 61010 1 e UL 61010 1 CSA 612010 1 B Note For UL and other safety certifications refer to the product label or visit ni com certification search by model number or product line and click the appropriate link in the Certification column Hazardous Locations The NI USB 9237 is not certified for use in hazardous locations Environmental The NI USB 9237 device is intended for indoor use only Operating temperature IEC60068 2 1 IEC 60068 2 2 0 to 60 C Storage temperature IEC60068 2 1 IE
3. Carrier The NI 9237 module and USB 9162 carrier are packaged separately Refer to Figure 3 while completing the following assembly steps 1 Make sure that no signals are connected to the NI 9237 module and the USB cable is not connected to the device 2 Remove the protective cover from the 15 pin D SUB connector NI USB 9237 User Guide and Specifications 6 ni com 3 Align the I O module with the carrier as shown in Figure 3 Figure 3 Module Installation 4 Squeeze the latches and insert the NI 9237 module into the USB 9162 carrier 5 Press firmly on the connector side of the NI 9237 module until the latches lock the module into place as shown in Figure 4 Figure 4 Locking Module into Place National Instruments Corporation 7 NI USB 9237 User Guide and Specifications Mounting the NI USB 9237 to a Panel Threaded inserts are located in the NI USB 9237 for mounting it to a panel Refer to Figure 5 for dimensions 85 7 mm 3 37 in 72 2 mm i in Threaded Insert M3 x 0 5 8 5 mm 0 34 in Max Depth 76 1 mm Figure 5 Module Dimensions in Millimeters Inches Connecting the NI USB 9237 to a Computer LED Indicator Plug one end of the USB cable into the NI USB 9237 and the other end into an available USB port on the computer Refer to the NJ DAQmx for USB Devices Getting Started Guide that shipped with your device and is also acc
4. Help which is fully integrated with the Microsoft Visual Studio NET help To view this help file in Visual Studio NET select Measurement Studio NI Measurement Studio Help To create an application in Visual C Visual C or Visual Basic NET follow these general steps 1 In Visual Studio NET select File New Project to launch the New Project dialog box 2 Find the Measurement Studio folder for the language you want to create a program in 3 Choose a project type You add DAQ tasks as a part of this step NI USB 9237 User Guide and Specifications 4 ni com ANSI C without NI Application Software The NI DAQmx Help contains API overviews and general information about measurement concepts Select Start All Programs National Instruments NI DAQ NI DAQmx Help The NI DAQmx C Reference Help describes the NI DAQmx Library functions which you can use with National Instruments data acquisition devices to develop instrumentation acquisition and control applications Select Start All Programs NationalInstruments NI DA Q NI DAQmx C Reference Help NET Languages without NI Application Software With the Microsoft NET Framework version 1 1 or later you can use NI DAQmx to create applications using Visual Cft and Visual Basic NET without Measurement Studio You need Microsoft Visual Studio NET 2003 or Microsoft Visual Studio 2005 for the API documentation to be installed The installed documentation contains
5. United Kingdom 44 0 1635 52354 National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1ega1 for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents 2007 National Instruments Corporation All rights reserved 372306B 01 Dec07
6. bridge Shunt calibration is most useful with quarter bridge sensors because there may be significant resistance in the wiring to the active resistor in the bridge The NI USB 9237 shunt calibration circuitry consists of a precision 100 kQ resistor and a software controlled switch You can leave the shunt calibration terminals connected to the sensor and then apply or remove the shunt calibration resistance in software While remote sensing corrects for resistances from the EX terminals on the NI USB 9237 to the sensor shunt calibration corrects for these errors and for errors caused by wire resistance within an arm of the bridge Shunt calibration involves simulating the input of strain by changing the resistance of an arm in the bridge by some known amount This is accomplished by shunting or connecting a large resistor of known value across one arm of the bridge creating a known strain induced change in resistance The output of the bridge can then be measured and compared to the expected voltage value The results are used to correct gain errors in the entire measurement path or to simply verify general operation to gain confidence in the setup A stable signal which is typically the unloaded state of the sensor is used first with the shunt calibration switch off and then again with the switch on The difference in these two measurements provides an indication of the gain errors from wiring resistances You can design the software a
7. r H USER GUIDE AND SPECIFICATIONS NI USB 9237 4 Channel 24 Bit Half Full Bridge Analog Input Device COFEAX2kOHBARZhRI OUuClE ni com manuals e SEL C X TZ amp UN For a Japanese language version go to ni com manuals This user guide describes how to use the National Instruments USB 9237 and lists the device specifications The NI USB 9237 provides a USB interface for four channels of 24 bit half full bridge analog input Introduction The NI USB 9237 consists of two components an NI 9237 module and an NI USB 9162 carrier as shown in Figure 1 NI USB 9237 Figure 1 NI USB 9237 Components Kc NATIONAL p INSTRUMENTS Dimensions Figure 2 shows the NI USB 9237 device dimensions CC CxCCC a FT 14 Hi Speed USB Carrier NI USB 9162 123 67 mm 120 68 mm 4 869 in 4 751 in II 121 28 mm 118 29 mm 4 775 in 4 567 in Won AP at Nee en I 88 11 mm 3 469 in m oo 25 08 mm 0 988 in Figure 2 NI USB 9237 Device in Millimeters Inches Safety Guidelines Operate the NI USB 9237 only as described in these operating instructions iyi Note Although the NI 9237 module may have more stringent certification standards than the NI USB 9237 when used with the NI USB 9162 carrier the combined system may be limited Refer to the Specifications sect
8. 3 EX 4 EX Figure 6 Four Position External Excitation Voltage Source Connection Connecting Loads to the NI USB 9237 Refer to Figure 7 for an illustration of how to connect full and half bridges to the NI USB 9237 When you connect a half bridge TEDS T to the NI USB 9237 the Al signal is not connected 1 The dotted line indicates that the full 2 These four signals are the only bridge is optional while the half bridge signals that must be connected is required Figure 7 Half and Full Bridge Connections 3 Note You can use a quarter bridge with the NI USB 9237 if you either add a resistor externally to create a half bridge or use the NI 9944 or NI 9945 Quarter Bridge Completion Accessory Visit ni com and search for the NI 9944 and or NI 9945 Quarter Bridge National Instruments Corporation 11 NI USB 9237 User Guide and Specifications Completion Accessories for more information about these accessories and how to purchase them Wiring TEDS Channels Ensure that neither the TEDS data T nor the TEDS return T is tied in common to any AI signals on the NI USB 9237 Visit ni com info and enter the info code rdteds for information about TEDS sensors NI USB 9237 Connection Options Wiring resistance can create errors in bridge circuits The NI USB 9237 provides two mechanisms to correct for these errors remote sensing and shunt calibration Remote Sens
9. C 60068 2 2 40 to 85 C Ingress protection seseese IP 40 NI USB 9237 User Guide and Specifications 20 ni com Operating humidity IEC 60068 2 56 sse 10 to 9096 RH noncondensing Storage humidity TEC 60068 2 56 sse 5 to 9596 RH noncondensing Maximum altitude 2 000 m Pollution Degree IEC 60664 2 Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement control and laboratory use e EN 61326 EMC requirements Minimum Immunity e EN 55011 Emissions Group 1 Class A e CE C Tick ICES and FCC Part 15 Emissions Class A 3 Note For EMC compliance operate this device with double shielded cables CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows e 2006 95 EC Low Voltage Directive safety e 2004 108 EC Electromagnetic Compatibility Directive EMC 3 Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column National Instruments Corporation 21 NI USB 9237 User Guide and Specifications Environmental Man
10. agement National Instruments is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers For additional environmental information refer to the NMI and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of their life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers and National Instruments WEEE initiatives visit ni com environment weee htm x ASRS mist l BEDE CHE RoHS OO PHA National Instruments 4 rb Edit TAA EP b b MT eS gt RoHS XT National Instruments FE RoHS CHER E ita ni com environment rohs china For information about China RoHS compliance go to ni com environment rohs china Calibration You can obtain the calibration certificate for the NI USB 9237 at ni com calibration Calibration interval esses year NI USB 9237 User Guide and Specifications 22 ni com Where to Go for Support The National Instruments Web site is your complete resource for technical support At ni com
11. d primarily by passband flatness and phase nonlinearity The filters reject frequencies within the stopband as much as possible as quantified by stopband rejection All signals that appear in the alias free bandwidth are either unaliased signals or signals that have been filtered by at least the amount of the stopband rejection Passband The signals within the passband have frequency dependent gain or attenuation The small amount of variation in gain with frequency is called the passband flatness The filters of the NI USB 9237 adjust the frequency range of the passband to match the data rate Therefore the amount of gain or attenuation at a given frequency depends on the data rate Figure 9 shows typical passband flatness for a range of data rates 0 025 0 000 e 2 c T 0 0 025 0 050 0 0 2 0 4 0 6 0 8 1 Frequency Sample Rate kHz Figure 9 Typical Passband Response National Instruments Corporation 15 NI USB 9237 User Guide and Specifications Stopband The filter significantly attenuates all signals above the stopband frequency The primary goal of the filter is to prevent aliasing Therefore the stopband frequency scales precisely with the data rate The stopband rejection is the minimum amount of attenuation applied by the filter to all signals with frequencies that would be aliased into the alias free bandwidth Alias Free Bandwidth Any signal that appears in the alias free bandwidth of th
12. e NI USB 9237 is not an aliased artifact of signals at a higher frequency The alias free bandwidth is defined by the ability of the filter to reject frequencies above the stopband frequency and equals the data rate minus the stopband frequency Specifications The following specifications are typical for the range 0 to 60 C unless otherwise noted Input Characteristics Number of channels se 4 Bridge completion Full and half Internal Qa rteE cete eite e epe External ADC resolution eseeeeeees 24 bits Type of ADC igne Delta sigma with analog prefiltering Sampling mode sess Simultaneous Data rates fs eem tease OU ENT po 1 2 31 Master timebase internal Frequency eee 12 8 MHz ACUTI oi nn e iia 100 ppm max Nominal full scale range 25 mV V Scaling coefficient susss 2 9802 nV V per LSB NI USB 9237 User Guide and Specifications 16 ni com Overvoltage protection between any two terminals 30V Accuracy Percent of Reading Percent of Range Error Gain Error Offset Error Calibrated max 0 to 60 C 0 20 0 25 Calibrated typ 25 C 5 C 0 05 0 05 Uncalibrated max 0 to 60 C 0 60 0 35 Uncalibrated typ 25 C 5 C 0 20 0 1 Excluding offset null or shunt calibration Range equals 25 mV V
13. e pin numbers of the RJ 50 10 position 10 conductor 10p10c modular plug and the NI USB 9237 receptacle The NI USB 9237 also has a four position connector you can use to connect an external excitation voltage source to the module Table 2 lists the connections between an external excitation voltage source and the NI USB 9237 iyi Note For a list of accessories available for use with the NI USB 9237 refer to ni com info and enter info code rd9237 National Instruments Corporation 9 NI USB 9237 User Guide and Specifications Table 2 Terminal Assignments RJ 50 10p10c Modular Plug and Receptacle Signal Signal Pin Numbers RJ 50 Pin RJ 45 Pin Name Description 1 SC Shunt calibration 2 1 AI Positive input signal 3 2 AI Negative input signal gt us C 2 4 3 RS Positive remote sense signal 5 4 RS Negative remote sense signal 6 5 EX Positive excitation signal 7 6 EX Negative excitation signal 8 7 T TEDS data 9 8 T TEDS return 10 SC Shunt calibration These signals are shared by all four RJ 50 connectors on the NI USB 9237 UN Caution National Instruments does not recommend using an RJ 45 with the NI USB 9237 because it can physically damage pins and 10 on the device and thus permanently disable shunt calibration no matter what connector you use NI USB 9237 User Guide and Specifications 10 ni com 1 EX 2 EX
14. ements measurement fundamentals NI DAQmx key concepts and device considerations LabWindows CVI The Data Acquisition book of the LabWindows CVI Help contains measurement concepts for NI DAQmx This book also contains Taking an NI DAQmx Measurement in LabWindows CVI which includes step by step instructions about creating a measurement task using the DAQ Assistant In LabWindows CVI select Help Contents then select Using LabWindows CVI Data Acquisition The NI DAQmx Library book of the LabWindows CVI Help contains API overviews and function reference for NI DAQmx Select Library Reference NI DAQmx Library in the LabWindows CVI Help Measurement Studio If you program your NI DAQmx supported device in Measurement Studio using Visual C Visual C or Visual Basic NET you can interactively create channels and tasks by launching the DAQ Assistant from MAX or from within Visual Studio NET You can generate the configuration code based on your task or channel in Measurement Studio Refer to the DAQ Assistant Help for additional information about generating code You also can create channels and tasks and write your own applications in your ADE using the NI DAQmx API For help with NI DAQmx methods and properties refer to the NI DAQmx NET Class Library or the NI DAQmx Visual C Class Library included in the NI Measurement Studio Help For general help with programming in Measurement Studio refer to the N Measurement Studio
15. essible from Start All Programs National Instruments NI DAQ for more information The NI USB 9237 device has a green LED next to the USB connector The LED indicator indicates device status as listed in Table 1 When the device is connected to a USB port the LED blinks steadily to indicate that the device is initialized and is receiving power from the connection If the LED is not blinking it may mean that the device is not initialized or the computer is in standby mode In order for the device to be recognized the device must be connected to a computer that has NI DAQmx installed on it If your device is not blinking make sure your computer has the latest version of NI DAQmx installed on it and the computer is not in standby mode NI USB 9237 User Guide and Specifications 8 ni com Table 1 LED State Device Status LED State Device Status Not lit Device not connected or in suspend On not blinking Device connected but no module installed Single blink Operating normally Double blink Connected to USB Full Speed port Device performance might be affected Refer to the Specifications section for more information Quadruple blink Device error Refer to ni com support Wiring the NI USB 9237 Device The NI USB 9237 has four RJ 50 receptacles that provide connections for four half or full bridges Table 2 lists the signal names of the terminals for each connector and shows the correlation between th
16. ing Remote sensing continuously and automatically corrects for errors in excitation leads and generally is most appropriate for full and half bridge sensors Long wire and smaller gauge wire has greater resistance which can result in gain error The voltage drop caused by resistance in the wires connecting the excitation voltage to the bridge is a source of gain error The NI USB 9237 includes remote sensing to compensate for this error Remote sense wires are connected to the point where the excitation voltage wires connect to the bridge circuit Figure 8 shows a diagram of how the NI USB 9237 uses remote sensing RS EX Roridge ridge Roridge EX RS Figure 8 Remote Sensor Error Compensation NI USB 9237 User Guide and Specifications 12 ni com As shown in Figure 8 the actual bridge excitation voltage is smaller than the voltage at the EX and EX leads If remote sensing of the actual bridge voltage is not used the resulting gain error is 2 Rag R bridge for full bridge sensors and Read Rpridge for half bridge sensors If the remote sense RS signals are connected directly to the bridge resistors the NI USB 9237 senses the actual bridge voltage sense and eliminates the gain errors caused by the resistance of the EX and EX leads Shunt Calibration Shunt calibration can correct for errors from the resistance of both the excitation wiring and wiring in the individual resistors of the
17. ing environments Select Start All Programs National Instruments NI DAQ NI DAQmx Help LabVIEW If you are a new user use the Getting Started with LabVIEW manual to familiarize yourself with the LabVIEW graphical programming environment and the basic LabVIEW features you use to build data acquisition and instrument control applications Open the Getting Started with LabVIEW manual by selecting Start All Programs National Instruments LabVIEW LabVIEW Manuals or by navigating to the labview manuals directory and opening LV Getting Started pdf Use the LabVIEW Help available by selecting Help Search the LabVIEW Help in LabVIEW to access information about LabVIEW programming concepts step by step instructions for using LabVIEW and reference information about LabVIEW VIs functions palettes menus and tools Refer to the following locations on the Contents tab of the LabVIEW Help for information about NI DAQmx e Getting Started Getting Started with DAQ Includes overview information and a tutorial to learn how to take an NI DAQmx measurement in LabVIEW using the DAQ Assistant e VI and Function Reference Measurement I O VIs and Functions Describes the LabVIEW NI DAQmx VIs and properties National Instruments Corporation 3 NI USB 9237 User Guide and Specifications Taking Measurements Contains the conceptual and how to information you need to acquire and analyze measurement data in LabVIEW including common measur
18. ion 5 NI USB 9237 User Guide and Specifications Training Courses If you need more help getting started developing an application with NI products NI offers training courses To enroll in a course or obtain a detailed course outline refer to ni com training Technical Support on the Web For additional support refer to ni com support or zone ni com Installing the Software Software support for the NI USB 9237 for Windows Vista XP 2000 is provided by NI DAQmx The DAQ Getting Started Guide which you can download at ni com manuals offers NI DAQmx users step by step instructions for installing software and hardware configuring channels and tasks and getting started developing an application Installing Other Software If you are using other software refer to the installation instructions that accompany your software Example Programs The NI DAQmx CD contains example programs that you can use to get started programming with the NI USB 9237 Refer to the NI DAQmx for USB Devices Getting Started Guide that shipped with your device and is also accessible from Start All Programs National Instruments NI DAQ for more information Installing the NI USB 9237 Device Before installing the device you must install the software you plan to use with the device Refer to the Installing the Software section of this guide and the documentation included with the software for more information Installing the NI 9237 in the USB 9162
19. ion for more details Hot Surface This icon denotes that the component may be hot Touching this component may result in bodily injury Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous Caution The NI USB 9237 is not certified for use in hazardous locations gt b amp b Be NI USB 9237 User Guide and Specifications 2 ni com Related Documentation Each application software package and driver includes information about writing applications for taking measurements and controlling measurement devices The following references to documents assume you have NI DAQmx 8 7 or later and where applicable version 7 1 or later of the NI application software NI DAQmx for Windows The DAQ Getting Started Guide describes how to install your NI DAQmx for Windows software your NI DAQmx supported DAQ device and how to confirm that your device is operating properly Select Start All Programs National Instruments NI DAQ DAQ Getting Started Guide The NI DAQ Readme lists which devices are supported by this version of NI DAQ Select Start All Programs National Instruments NI DAQ NI DAQ Readme The NI DAQmx Help contains general information about measurement concepts key NI DAQmx concepts and common applications that are applicable to all programm
20. nector NI USB 9237 Circuitry The NI USB 9237 is isolated from earth ground However the individual channels are not isolated from each other The EX EX and T signals are common among all channels You can connect the NI USB 9237 to a device that is biased at any voltage within the NI USB 9237 rejection range of earth ground Refer to the Specifications section for more information You also can connect floating signals to the NI USB 9237 If you connect floating signals to the NI USB 9237 National Instruments recommends you connect the EX signal to the earth ground or shield for better noise rejection NI USB 9237 User Guide and Specifications 14 ni com Each channel on the NI USB 9237 has an independent 24 bit ADC and input amplifier that enable you to sample signals from all four channels simultaneously The NI USB 9237 also includes filters to prevent aliasing The filters on the NI USB 9237 filter according to the sampling rate Understanding NI USB 9237 Filtering The NI USB 9237 uses a combination of analog and digital filtering to provide an accurate representation of desirable signals while rejecting out of band signals The filters discriminate between signals based on the frequency range or bandwidth of the signal The three important bandwidths to consider are the passband the stopband and the alias free bandwidth The NI USB 9237 represents signals within the passband as accurately as possible as quantifie
21. pplication to correct subsequent readings for this gain error National Instruments Corporation 13 NI USB 9237 User Guide and Specifications Excitation Voltages Although the sensor industry does not recognize a single standard excitation voltage level excitation voltage levels of between 2 5 V and 10 V are common You can program the NI USB 9237 to supply 2 5 V 3 3 V 5 V or 10 V of excitation voltage and the module can provide up to 150 mW of excitation power Unless you supply external excitation voltage National Instruments recommends that you set the excitation voltage to a value that keeps the total power below 150 mW The NI USB 9237 automatically reduces internal excitation voltages as needed to stay below 150 mW The power consumed by a single bridge is y 2 ex R where R is the total resistance of the bridge For a full bridge R is equal to the resistance of each element For a half or quarter bridge R is equal to two times the resistance of each element The 150 mW limit allows you to power full and half bridges as follows e Four 350 Q half bridges at 5 0 V e Four 350 Q full bridges at 3 3 V e Four 120 Q half bridges at 2 5 V If you need an excitation voltage greater than 150 mW use the four position external excitation voltage connector to connect an external excitation source to the NI USB 9237 Refer to Figure 6 for an illustration and pinout description of the four position external excitation voltage con
22. support you have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial 512 795 8248 For telephone support outside the United States contact your local branch office Australia 1800 300 800 Austria 43 662 457990 0 Belgium 32 0 2 757 0020 Brazil 55 11 3262 3599 Canada 800 433 3488 China 86 21 5050 9800 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 358 0 9 725 72511 France 01 57 66 24 24 Germany 49 89 7413130 India 91 80 41190000 Israel 972 3 6393737 Italy 39 02 41309277 Japan 0120 527196 Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 2005151 Taiwan 886 02 2377 2222 Thailand 662 278 6777 Turkey 90 212 279 3031
23. the NI DAQmx API overview measurement tasks and concepts and function reference This help is fully integrated into the Visual Studio NET documentation To view the NI DAQmx NET documentation go to Start Programs National Instruments NI DAQ NI DAQmx NET Reference Help Expand NI Measurement Studio Help NI Measurement Studio NET Class Library Reference to view the function reference Expand NI Measurement Studio Help NI Measurement Studio NET Class Library Using the Measurement Studio NET Class Libraries to view conceptual topics for using NI DAQmx with Visual Cft and Visual Basic NET To get to the same help topics from within Visual Studio go to Help Contents Select Measurement Studio from the Filtered By drop down list and follow the previous instructions Device Documentation and Specifications NI DAQmx includes the Device Document Browser which contains online documentation for supported DAQ SCXI and switch devices such as help files describing device pinouts features and operation and PDF files of the printed device documents You can find view and or print the documents for each device using the Device Document Browser at any time by inserting the CD After installing the Device Document Browser device documents are accessible from Start All Programs National Instruments NI DAQ Browse Device Documentation 3 Note You can download these documents at ni com manuals National Instruments Corporat
24. ynamic range SBEDR s esee treten ts 106 dB 1 KHz 60 dBFS Total harmonic distortion fundamental 20 dBFS EKHZz ii uS Rn 100 dB SZ iicet eer 90 dB Excitation noise eeeeeeeeeeees 0 1 mV V ims 1 Rejection by analog prefilter of signal frequencies at oversample rate 2 Measured with a balanced cable Shielded cables may be significantly unbalanced NI USB 9237 User Guide and Specifications 18 ni com Crosstalk Shunt calibration ReSistance ensi duet Resistor accuracy 29 Cuisine es 0 10 60 C sin sse Excitation Internal voltage Internal power External voltage Power Requirements Current consumption from USB Suspend mode s Bus Interface USB specification Physical Characteristics Dimensions Safety If you need to clean the module wipe it Safety Voltages 110 Q 200 Q 2 5 V 3 3 V 5 0 V 10 0 V 150 mW max 2Vtold0V 500 mA max 2 5 mA max USB 2 0 Hi Speed 12 1 cm x 8 6 cm x 2 5 cm 4 75 in x 3 37 in x 0 99 in Approx 250 g 8 8 oz with a dry towel Connect only voltages that are within these limits Between any two terminals National Instruments Corporation x 30 V max NI USB 9237 User Guide and Specifications Isolation Channel to channel No isolation between channels Channel to earth ground Continuous
Download Pdf Manuals
Related Search