Manuale d’uso / di manutenzione del prodotto NI 9225E del fabbricante National Instruments
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OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9225E 3-Channel, 300 V rm s , 24-Bit, Simultaneous, Channel-to-Channe l Isolated Analog In put Module.
NI 9225E Operating I nstructio ns and Specifica tions 2 ni.com This document describes how to use the National Instruments 9225E and includes dimensions, terminal assignments, and specifications for the NI 9225E. V isit ni.com/info and enter rdsoftwareversion to determine which software you need for the modules you are using.
© National Inst ruments Corp. 3 NI 9225E Operating In structions and Specificat ions NI 9225E Dimensions The following f igure shows the dimensions of the NI 9225E. Figure 1. NI 9225E Dimens ions in Mi llimeters (I nches) 73.4 (2.89) 0.0 (0.00) 26.7 (1.
NI 9225E Operating I nstructions and Specificati ons 4 ni.com Connecting the NI 9225E The NI 922 5E has three 2-t erminal detachab le screw-terminal connectors that provide con nections for three simultaneously sampled, isolated an alog input channels.
© National Inst ruments Corp. 5 NI 9225E Operating In structions and Specificat ions Y ou can connect ground-referenced or floating signal sources to the NI 9225E. Connect the positiv e signal of the signal source to the AI+ terminal, and con nect the negati ve signal of the signal source to the AI– terminal.
NI 9225E Operating I nstructions and Specificati ons 6 ni.com Figure 3. Connecting a Groun ded Signal Source to the NI 9225E Figure 4. Connecti ng a Floating Signal Sour ce to the NI 9225E NI 9225E Si.
© National Inst ruments Corp. 7 NI 9225E Operating In structions and Specificat ions The NI 9225E analog input channels are floating with respect to earth ground and each other . The incoming analog signal on each channel is conditioned, bu ffered , and then sampled by a 24-bit Delta-Sigma ADC.
NI 9225E Operating I nstructions and Specificati ons 8 ni.com Understanding NI 9225E Filtering The NI 9225E uses a combination of analog and digital filtering to prov ide an accurate representation of in-band signals whi le rejecting out-of-band si gnals.
© National Inst ruments Corp. 9 NI 9225E Operating In structions and Specificat ions Figure 6. T ypical Passband Response of the NI 9225E F requency/Data Rate 0.
NI 9225E Operating I nstructions and Specificati ons 10 ni.com Stopband The f ilter signif icantly attenuat es all signals abo ve the stop band frequency . The primary goal of the filter is to pre vent aliasing. Therefore, the stopband frequency sc ales precisely wi th the data rate.
© National Inst ruments Corp. 11 NI 92 25E Operating Instructions and Specifications modules must share a single master timebase source. Refer to the software help for information about conf iguring the master timebase source for the NI 9225E. V isit ni.
NI 9225E Operating I nstructions and Specificati ons 12 ni.com Sleep Mode This module supports a lo w-powe r sleep mode. Su pport for sleep mode at the system le vel depends on the chassis that the module is plugged into. Refer to the chassi s manual for information about support for sleep mode.
© National Inst ruments Corp. 13 NI 92 25E Operating Instructions and Specifications Specifications The follo wing specific ations are typical for the range – 40 to 85 °C unless otherwise noted. All v oltages are relati ve to the AI– signal on each channel unles s otherwise noted.
NI 9225E Operating I nstructions and Specificati ons 14 ni.com Data rate range ( f s ) using e xternal master timebase Minimum ................... ......... ........ 390.6 S/s Maximum ......... ............ ........... ... 51.2 kS/s Data rates 1 ( f s ) .
© National Inst ruments Corp. 15 NI 92 25E Operating Instructions and Specifications Accuracy Input noise .............. ............ ........... ... 2 mV rms Stability Gain drift .......... ............ ........... ... ±10 ppm/ °C Offset drift ...
NI 9225E Operating I nstructions and Specificati ons 16 ni.com Crosstalk (60 Hz) ......... ........... .......... –130 dB Phase match Ch-to-ch, max ............ ......... ........ 0.035°/kHz Module-to-module, max ... .......... 0.035°/kHz + 360° · f in / f M Phase linearity ( f s = 50 kS/s) .
© National Inst ruments Corp. 17 NI 92 25E Operating Instructions and Specifications T otal Harmonic Distortion (T HD) (1 kHz, –20 dB) ........... .
NI 9225E Operating I nstructions and Specificati ons 18 ni.com Physical Characteristics If you need to clean the module, wipe it with a dry towel. Screw-terminal wiring .......... ............ 16 to 28 A WG copper conductor wire with 7 mm (0.28 in.) of insulation stripped from the end T orque for screw terminals .
© National Inst ruments Corp. 19 NI 92 25E Operating Instructions and Specifications Isolation Voltages Channel-to-channel Continuous .............. ......... .......... 600 V rms , Measurement Category II, (Basic insulation) W ithstand .............
NI 9225E Operating I nstructions and Specificati ons 20 ni.com Safety Standards This product meets the requirements of the follo w ing standards of safety for electrica l equipment for measurement , c.
© National Inst ruments Corp. 21 NI 92 25E Operating Instructions and Specifications Environmental National Instruments C Series modules are in tended for indoor use only but may be used outdoors if inst alled in a suitable enclosure. Refer to the manual for the chassis you are using for more information about meetin g these specif ications.
NI 9225E Operating I nstructions and Specificati ons 22 ni.com Environmental Mana gement NI is committed to designing a nd manufacturing products in an en vironmentally responsible manner . NI recognizes that eliminating certain ha zardous substances from our products is benef icial to the en vironment and t o NI customers.
© National Inst ruments Corp. 23 NI 92 25E Operating Instructions and Specifications Calibration Y ou can obtain the calibration cert ificate and information about calibration services for th e NI 9225E at ni.com/calibration . Calibration interval ..
NI 9225E Operating I nstructions and Specificati ons 24 ni.com Where to Go for Support The National Instruments W eb site is your complete resource for technical support.
© 2008 National I nstruments Corp. All rights reserved. 372618A-01 Jul08 National Instruments, NI, n i.com, and LabVIEW are trademarks of National Instrument s Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il National Instruments NI 9225E è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del National Instruments NI 9225E - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso National Instruments NI 9225E imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul National Instruments NI 9225E ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il National Instruments NI 9225E, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del National Instruments NI 9225E.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il National Instruments NI 9225E. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo National Instruments NI 9225E insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
