12-18-2014 02:33 PM
Greetings,
I have an application where i need to use 16 PCB ICP pressure sensors (Model: 113B22) with BNC plugs that have the following specs
Measurement Range: 5kpsi
Sensitivity: 1.0mV/psi (hence output signal +/-5VDC)
Excitation Voltage: 20 to 30VDC
Constant Current Excitation: 2 to 20mA
Output Bias Voltage: 8 to 14VDC
I am looking 9222 module and do I need an external power supply for pressure sensors? which module should I use?
12-19-2014 07:59 AM
You need a current supply with 2m-20mA for each sensor! If you connect a voltage supply the integrated electronic will signal with the magic white smoke 😉 , however it couldn't leave the housing so you only will end up with dead sensors.....
You should look for DAQ boards with IEPE current drive like the 9234.
Do you really need 400kS/s?
12-19-2014 08:50 AM
Thank You very much for your help. We have a Kistler 16 Channel Voltage Mode Piezoelectric Sensor Power Supply/Coupler to provides excitation power. 50 kS/s is good enough. What is different between NI 9239 and 9234?
12-19-2014 09:27 AM
Ask your NI engineer 🙂 , since I use external signal conditioner. I also just could look into the specs.