I have been given the task to set up a test equipment in which we will measure the blast wave from a compressed air puls, duration of puls 100ms-200ms. I have a PCB Pressure sensor modell 113B28 that i want to use. I want to use 5 of these sensors when the final test will begin but at the moment i just want to try out one sensor to confirm that it works
My question is how do i set this up? I have a cDAQ 9171 and i will get an 8 slot cDAQ later this week. The set-ups that i have in mind looks like this:
-cDAQ + 9232BNC: BNC connector from sensor straight in to the module and happy days. Is it really this simple?
-cDAQ + 9229 + 9265 + Vsup: This is obviously more complicated and more expensive. Supply voltage and current using 9265 + Vsup and measure voltage using 9229.
Can the 9232 supply the 113B28 with the voltage and current necessary to drive and read the sensor? As it is an ICP sensor i was told to look for IEPE and then i should be on the right track?
I am in a hurry and need to get this done as soon as possible.
Thank you in advance for any responses!
YES, the 9232 will work with your PCB sensor,
sensor supply current range 2-20 mA , 9232 4mA 🙂
However, have a close look at the specifications, the passband ripple results in an accuracy of 0,6% so the 24bit reduces to less than 8bit accuracy in dynamic applications!!
If 51 kSPS is fine for your application switch to an 9234 wich is about 10 times better 😉 and the 2mA exitation current is still fine with your sensor IF you have short cables (<4m?)
Thank you very much! Is the 5V+- enough? (As you can see i have very little experience in this field). NI was kind enough to let me borrow an 9232 but my cDAQ has not yet arrived. I do not know how long cables i need to run. Probably in the 5-10 meter range if i don't get noise from other equipments. At what cable length will the 2mA exitation current limit me?
If i understand this correctly then i would be able to run 30m of cable at 40 000Hz: http://www.ni.com/tutorial/7274/en/
I don't really know how many samples/sec i need but i would guess that 10 000 is good enough.
Again, thank you very much for your help!