NI 9234

[Pinar CK]

Maximum sampling rate for NI 9234 is given as 51.2 kS/s in NI documentation. This means that for a measurement assembly collecting measurements from 3 different instruments the rate is 51.2 kiloSample/second/3= 17 kiloSample/second. This is 17,000 sample/second. The number seems very high. Could someone please confirm if this is correct?

[JÞB]

---

@Pinar CK wrote:

Maximum sampling rate for NI 9234 is given as 51.2 kS/s in NI documentation. This means that for a measurement assembly collecting measurements from 3 different instruments the rate is 51.2 kiloSample/second/3= 17 kiloSample/second. This is 17,000 sample/second. The number seems very high. Could someone please confirm if this is correct?

---

You are just SLIGHTLY off with your math.  The 9234 is a simultaieous sampling device so you do not slow down.  In fact the max number os samples per second Acquired will be Sample Rate * Ch count or with three channels going at 51.2K and 24Bits (will transfer as a U32) you'll need to read 614.4KBytes per second to keep up

[Sean_N · Accepted solution]

As Jeff pointed out, the 9234 has an ADC per channel.  So if you are sampling 3 channels at 51.2 kS/s, then you are acquiring 153.6 kS/s.  At 3 bytes per sample, this means you are streaming 460.8 kB/s.  This is well within the specification of ethernet or USB, depending on the chassis you are using.  I hope this helps.

Thanks,

Sean

[Pinar CK]

Jeff and Sean,

I believe my lack of knowledge on the subject was quite obvious! Your responses helped, thanks.

Pinar

[Avenir]

Also can you confirm that the following Accelerometer from IMI Sensor will work with NI 9234

604B31: Triaxial ring-style, industrial, ceramic shear ICP accelerometer, 100mV/g, o.5 to 5k Hz, side exit, 4-pin connection

Thanks

[Carisa_L]

According to the specifications of that sensor it should work with the 9234. It can provide a max of 19V according to the User Manual on page 22. Hope this helps!

-Carisa

[Avenir]

Thanks: You have been a great help.

Iqbal

[Tpnini]

Is the sampling rate depending on the number of channels I use for NI 9234? 

51.2 kS/s is the maximum sampling rate for 9234 even if I use 1 channel?