Gebruiksaanwijzing /service van het product NI 9234 van de fabrikant National Instruments
Ga naar pagina of 36
OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9234 4-Channel, ± 5 V, 24-Bit Software-Selectable IEPE and AC/DC Analog Input Module ni.com/manuals Deutsch Français.
NI 9234 Operating I nstruction s and Specificati ons 2n i . c o m This doc u ment describes ho w to u se the National Instr u ments 9 234 and incl u des specif ications and con nector assignments for the NI 9234. V isit ni.com/info and enter rd s oftwarever s ion to determine which software yo u need for the mod u les yo u are u sing.
© National Instruments Corp. 3 NI 9234 Operating Instructi ons and Specific ations Safety Guidelines Operate the NI 9234 only as described in these operating instr u ctions. Hot Surface This icon denotes that the component may be hot. T o u ching this component may res u lt in bodily inj u ry .
NI 9234 Operating I nstruction s and Specificati ons 4n i . c o m Caution S u bstit u tion of components may impair s u itability for Class I, Division 2. Caution For Zone 2 applications, install the system in an enclos u re rated to at least IP 54 as defined b y IEC 60529 an d EN 60529 .
© National Instruments Corp. 5 NI 9234 Operating Instructi ons and Specific ations Special Conditions fo r Marine Ap plications Some mod u les are Lloyd’ s Register (LR) T ype Approv ed for marine applications. T o verify Llo yd’ s Register cert if ication, visit ni.
NI 9234 Operating I nstruction s and Specificati ons 6n i . c o m Connecting the NI 9234 The NI 9234 has fo u r BNC connectors that pr ovide connections to fo u r sim u ltaneo u sly sampled analog inp u t channels.
© National Instruments Corp. 7 NI 9234 Operating Instructi ons and Specific ations Each channel has a BNC connector to which yo u can connect a signal so u rce. Y o u can also enable excita tion c u rrent on a per-channel basis to connect Integr at ed Electronics Pi ezoelectric (IEPE) sensors.
NI 9234 Operating I nstruction s and Specificati ons 8n i . c o m Refer to Fig u res 2 and 3 for ill u strations of connecting gro u nded and floating signal so u rces to the NI 9234.
© National Instruments Corp. 9 NI 9234 Operating Instructi ons and Specific ations Figure 3. Connecting a Floating Signal Source to the NI 9234 The NI 9234 can also provide an IEPE excitation c u rr ent for ea ch channel to meas u re gr o u nd-referenced or floati ng IEPE sensors.
NI 9234 Operating I nstruction s and Specificati ons 10 ni.com NI 9234 Circuitr y The NI 9234 analog inp u t channels are referenced to chass is gro u nd thro u gh a 50 Ω resistor . T o minimize gro u nd noise, make s u re the chassis gro u nd is connected to earth gro u nd.
© National Instruments Corp. 11 NI 9234 O perating In structions and Specificat ions Figure 4. NI 9234 Input Cir cuitr y for One Channel The NI 9234 u ses common-mode bias c u rrent to bias the c u rrent-limiting diodes when IEPE c u rrent is t u rned off.
NI 9234 Operating I nstruction s and Specificati ons 12 ni.com Figure 5. Measurement Error Introduced by Common-Mode Bias Current The NI 9234 also has TEDS circ u itry .
© National Instruments Corp. 13 NI 9234 O perating In structions and Specificat ions Understanding NI 9234 Filtering The NI 9234 u ses a combination of anal og and digita l f iltering to provide an acc u rate representation of in-band signals whi le rejecting o u t-of-band signals.
NI 9234 Operating I nstruction s and Specificati ons 14 ni.com Figure 6. NI 9234 T ypical Passband Flatness F requency/Data Rate 0.5 0.4 0.025 0.000 –0.
© National Instruments Corp. 15 NI 9234 O perating In structions and Specificat ions Stopband The filter signif icantly atten u ates all signals abo ve the stop band freq u ency . The primary goal of the fi lter is to pre vent aliasing. Therefore, the stopband freq u ency scales precisel y with the data rate.
NI 9234 Operating I nstruction s and Specificati ons 16 ni.com Understanding NI 9234 Data Rates The freq u ency of a ma ster timebase ( f M ) controls the data rate ( f s ) of the NI 9234. The NI 9234 incl u des an int ernal master timebase with a freq u ency of 13.
© National Instruments Corp. 17 NI 9234 O perating In structions and Specificat ions of 13.1072 MHz, the res u lt is da ta rates of 51.2 kS/s, 25.6 kS/s, 17.067 kS/s, and so on do wn to 1. 652 kS/s, depending on the v al u e of n . When u sing an external timebase with a fre q u ency other than 13.
NI 9234 Operating I nstruction s and Specificati ons 18 ni.com Specifications The follo wing specif ications are typical for the rang e – 40 to 70 °C u nless otherwise noted. Input Characteristics N u mber of channels .................. ........ 4 a nalog inp u t channels ADC resol u tion .
© National Instruments Corp. 19 NI 9234 O perating In structions and Specificat ions Data rate range ( f s ) u sing external master timebase Minim u m ...................... ......... ..... 0.391 kS/s Maxim u m ....................... ............ 52.
NI 9234 Operating I nstruction s and Specificati ons 20 ni.com AC c u tof f freq u ency response F requency (Hz) 10 4 0.5 0.0 –0.5 –1.0 3 2 1 09 8 7 6 5 Gain (dB).
© National Instruments Corp. 21 NI 9234 O perating In structions and Specificat ions Inp u t range ...... ........ ............ ........... ... ±5 V AC v o l t a g e f u ll-scale range Minim u m .. ........ ............ ......... ..... ±5 V pk T ypi cal .
NI 9234 Operating I nstruction s and Specificati ons 22 ni.com IEPE compliance voltage .......... ........ 19 V ma x If yo u are u sing an IEPE sensor , u se the following eq u ation to make s u re yo u r config u ration meets the IEPE compliance v oltage range.
© National Instruments Corp. 23 NI 9234 O perating In structions and Specificat ions Acc u racy 1 1 Refer to the NI 9234 Circuitry section for informat ion regarding gro u nded signal so u rces and meas u rement acc u racy .
NI 9234 Operating I nstruction s and Specificati ons 24 ni.com Gain drift T ypi cal . ........... ......... ........... ........ 0.14 mdB/°C (16 ppm/° C) Maxim u m ......... ............ ........... ... 0.45 mdB/°C (52 ppm/°C) Offset drift T ypi cal .
© National Instruments Corp. 25 NI 9234 O perating In structions and Specificat ions Alias-free bandwidth ..... ......... .......... 0.45 · f s Oversample rate ......... ........... ......... ... 64 · f s Crosstalk (1 kHz) ........... ......... ...
NI 9234 Operating I nstruction s and Specificati ons 26 ni.com T otal harmonic distortion (THD) Intermod u lation distortion (–1 dBFS) DIN 250 Hz/8 kHz 4:1 amplit u de ratio ......... ............ –80 dB CCIF 11 kHz/12 kHz 1:1 amplit u de ratio ..
© National Instruments Corp. 27 NI 9234 O perating In structions and Specificat ions Power Requirements Power cons u mption fr om chassis Activ e mode .............. ............ ..... 900 mW max Sleep mode .......... ......... ........... ... 25 μ W max Thermal dissipation (at 70 °C) Active mode .
NI 9234 Operating I nstruction s and Specificati ons 28 ni.com Safety Safety Voltages Connect only v oltages that are within the follo wing limits. Channel-to-earth gro u nd .............. ..... ±30 V max, Meas u rement Category I Isolation Channel-to-channel .
© National Instruments Corp. 29 NI 9234 O perating In structions and Specificat ions Hazardous Locations U.S. (UL) .......... ......... ........... ......... ... Class I, Division 2, Gro u ps A, B, C, D, T4; Class I, Zone 2, AEx nA IIC T4 Canada (C-UL) .
NI 9234 Operating I nstruction s and Specificati ons 30 ni.com Electromagnetic Compatibility This prod u ct meets the req u irements of the follo wing EMC standards for electrical eq u ipment for meas.
© National Instruments Corp. 31 NI 9234 O perating In structions and Specificat ions CE Compliance This prod u ct meets the essent ial req u irem ents of app licable E u ropean Directi ves as follows.
NI 9234 Operating I nstruction s and Specificati ons 32 ni.com Shock and Vibration T o meet these specifications, yo u m u st panel mo u nt the system. Operating vibration Random (IEC 60068-2-64)......... 5 g rms , 10 to 500 Hz Sin u soidal (IEC 60068-2-6) .
© National Instruments Corp. 33 NI 9234 O perating In structions and Specificat ions Operating h u midity (IEC 60068-2-56)....... ........... ............ 10 to 90% RH, noncondensing Storage h u midity (IEC 60068-2-56)....... ........... ............
NI 9234 Operating I nstruction s and Specificati ons 34 ni.com Waste Electrical and Electronic Equipment (WEEE) EU Customers At t he end of their lif e cycl e, all prod u cts must be sent to a WEEE re c ycling center . For more information abo u t WEEE recycling ce nters and National Instr u ments WEEE initiati ves, visit ni.
© National Instruments Corp. 35 NI 9234 O perating In structions and Specificat ions Where to Go for Support The National Instr u ments W eb site is yo u r complete reso u rce for technical s u pport.
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 t rademarks. Other product and company names ment ioned herein are tradema rks or trade names of their respec tive companies.
Een belangrijk punt na aankoop van elk apparaat National Instruments NI 9234 (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen National Instruments NI 9234 heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens National Instruments NI 9234 vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding National Instruments NI 9234 leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over National Instruments NI 9234 krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van National Instruments NI 9234 bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de National Instruments NI 9234 kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met National Instruments NI 9234 . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
