National InstrumentsメーカーNI USB-9237の使用説明書/サービス説明書
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USER GUIDE AND SPECIFICATIONS NI USB-9237 4-Channel, 24-Bit Half/Full-Br idge Analog Input Device This user guide describes how to use the National Instruments USB-9237 and lists the device specif ications. The NI USB-9237 provides a USB interface for four channels of 24-b it half/full-bridge analog input.
NI USB-9237 U ser Guide and Specifications 2 ni.com Dimensions Figure 2 shows the NI USB-9237 device dim ensions. Figure 2. NI USB-9237 Device in Millimeters (Inches) Safety Guidelines Operate the NI USB-9237 on ly as described in thes e operating instructions.
© National Instruments Corporation 3 NI USB-9237 User Guid e and Specifications Related Documentation Each application software package an d dri ver includes information about writing applications for taking measur ements and controlling measurement devices.
NI USB-9237 U ser Guide and Specifications 4 ni.com • Taking Measurements —Contains the conceptual and ho w-to information you need to acquire and analyze measurement data in LabVIEW , including common measurements, measurement fundamentals, NI-DA Qmx key concepts, and de vice considerations.
© National Instruments Corporation 5 NI USB-9237 User Guid e and Specifications 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 .
NI USB-9237 User Guide and Specifications 6 ni.com T raining Courses If you need more help getting started developing an appli cation with NI products, NI offers training courses. To enroll in a co urse or obtain a detailed course outline, r efer to ni.
© National Instruments Corporation 7 NI USB-9237 User Guid e and Specifications 3. Align the I/O module with the carrier, as sho wn in Figure 3. Figure 3. Module Installation 4. Squeeze the latches and insert the NI 9237 module in to the USB-9162 carrier .
NI USB-9237 U ser Guide and Specifications 8 ni.com Mounting the NI USB-9237 to a Panel Threaded inserts are located in the NI USB-9237 for m ounting it to a panel.
© National Instruments Corporation 9 NI USB-9237 User Guid e and Specifications Wiring the NI USB-9237 Device The NI USB-9237 has four RJ-50 receptacles that provide connections for four half or full bridges.
NI USB-9237 U ser Guide and Specifications 10 ni.com Caution National Instruments does not recommend using an RJ-45 with the NI USB-9237 because it can physically damage pins 1 and 10 on the de vice, and th us permanently disable shunt calibration no matter what connect or you use.
© National Instruments Corporation 11 NI USB-9237 User Guid e and Specifications Figure 6. Four Position External Excita tion Voltage So urce Connection Connecting Loads to the NI USB-9237 Refer to Figure 7 for an illustration of how to connect full and half b ridges to the NI USB-9237.
NI USB-9237 U ser Guide and Specifications 12 ni.com Completion Accessories for more information about these accessories and how to purchase them. Wiring TEDS Channels Ensure that neither the TED S data (T+) nor the TEDS return (T–) is ti ed in common to any AI signals on the NI USB-9237.
© National Instruments Corporation 13 NI USB-9237 User Guid e and Specifications As shown in Figure 8, the actual bridge excitation voltage is smaller than the voltage at the EX+ and EX– leads. If remote sensin g of the actual b ridge voltage is not used, the resulting gain error is for full-bridge sensors, and for half-bridge sen sors.
NI USB-9237 U ser Guide and Specifications 14 ni.com Excitation V oltages Although the sensor in dustry does not recognize a single standa rd excitation voltage level , excitati on voltage le vels of between 2. 5 V and 10 V are common. You can program th e NI USB-9237 to supply 2.
© National Instruments Corporation 15 NI USB-9237 User Guid e and Specifications Each channel on the NI USB-9237 has an in dependent 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 pre vent aliasing.
NI USB-9237 U ser Guide and Specifications 16 ni.com Stopband The filter significantly attenuates all si gnals above the stopband frequency . The primary goal of the filter is to prevent aliasing. Therefore, the stopband frequency scales precisely with the data rate.
© National Instruments Corporation 17 NI USB-9237 User Guid e and Specifications Overvoltage protection between any two terminals ..................... ± 30 V Accuracy Gain drift ..... ................. .............. ............ 10 ppm/°C max Offset drift 2.
NI USB-9237 U ser Guide and Specifications 18 ni.com Stopband Frequency ...................... ................. .0.55 · f s Rejection .. .............. ................. .........100 dB Alias-free bandwidth .................. ............0.45 · f s Oversample rate .
© National Instruments Corporation 19 NI USB-9237 User Guid e and Specifications Crosstalk 1 kHz ......... ............... ................ ....... 110 dB 10 kHz ....... ............... ................ ....... 100 dB Shunt calibration Resistance ...
NI USB-9237 U ser Guide and Specifications 20 ni.com Isolation Channel-to-channel.............. ........ ....No isolation between channels Channel-to-earth g round Continuous .. .............. ...............60 VDC, Measurement Category I Withstand ..
© National Instruments Corporation 21 NI USB-9237 User Guid e and Specifications Operating humidity (IEC 60068-2-56) ....................... ............ 10 to 90% RH, noncondensing Storage humidity (IEC 60068-2-56) ................. ...... .........
NI USB-9237 U ser Guide and Specifications 22 ni.com Environmental Management National Instruments i s committed to designing and manu facturing products in an environmental ly responsible mann er. NI recognizes that eliminating certa in hazardous substances from our products is beneficial not only to t he environment but also to NI customers.
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National Instruments NI USB-9237をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはNational Instruments NI USB-9237の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。National Instruments NI USB-9237の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。National Instruments NI USB-9237で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
National Instruments NI USB-9237を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はNational Instruments NI USB-9237の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、National Instruments NI USB-9237に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちNational Instruments NI USB-9237デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
